@inbook{5059, author = {{Fettig, Joachim and Oldenburg, Martin}}, booktitle = {{Physical and Cyber Safety in Critical Water Infrastructure}}, editor = {{Ratnaweera, H. and Pivovarov, O.}}, pages = {{82--90}}, publisher = {{IOS Press}}, title = {{{Overview: Preparedness in the Water Supply and the Sanitation and Sewerage Sectors in Germany and Europe}}}, volume = {{56}}, year = {{2019}}, } @misc{12237, abstract = {{The effectiveness of controlling nitrogen (N) to manage lake eutrophication is debated. Long-term, whole-lake case studies are required to determine whether diazotrophic cyanobacteria can fix sufficient N to offset a reduction of N-inputs. We document the recovery of shallow, productive Lake Müggelsee (Germany) over 37 yr (sampling interval 1–2 weeks) during a decrease of N and phosphorus (P) loading of 79% and 69%, respectively. Nitrogen concentrations in the lake responded immediately to loading reduction whereas P concentrations remained elevated for about 20 yr. Total nitrogen (TN) in the lake was always lower than TN in the inflow. Accordingly, estimated denitrification and N-burial rates substantially exceeded N2 fixation rates in the long term. Phosphorus was growth limiting in spring whereas N was clearly limiting in summer due to high sediment P-release. TN : TP ratios, normalized to phytoplankton biovolume by regression, were 25.5 (weight) in spring and 3.3 in summer. During the study period, dissolved inorganic N (DIN) concentrations in summer decreased and the duration of low DIN concentrations increased by ca. 100 d. The biovolume of cyanobacteria and total phytoplankton decreased by 89% and 76%, respectively. The proportion of N2-fixing cyanobacteria during summer decreased from 36% to 14% of the total phytoplankton biovolume. The total concentration of heterocysts and estimated total N2 fixation did not change over time. In the long term, decreasing N-inputs effectively controlled summer cyanobacteria including N2-fixing taxa, which did not compensate for the N-deficit. A P-only control strategy would not have been as successful.}}, author = {{Shatwell, Tom and Köhler, Jan}}, booktitle = {{Limnology and Oceanography}}, issn = {{1939-5590}}, number = {{S1}}, publisher = {{Wiley}}, title = {{{Decreased nitrogen loading controls summer cyanobacterial blooms without promoting nitrogen‐fixing taxa: Long‐term response of a shallow lake}}}, doi = {{10.1002/lno.11002}}, volume = {{64}}, year = {{2018}}, } @misc{12239, abstract = {{The modelling community has identified challenges for the integration and assessment of lake models due to the diversity of modelling approaches and lakes. In this study, we develop and assess a one-dimensional lake model and apply it to 32 lakes from a global observatory network. The data set included lakes over broad ranges in latitude, climatic zones, size, residence time, mixing regime and trophic level. Model performance was evaluated using several error assessment metrics, and a sensitivity analysis was conducted for nine parameters that governed the surface heat exchange and mixing efficiency. There was low correlation between input data uncertainty and model performance and predictions of temperature were less sensitive to model parameters than prediction of thermocline depth and Schmidt stability. The study provides guidance to where the general model approach and associated assumptions work, and cases where adjustments to model parameterisations and/or structure are required.}}, author = {{Bruce, Louise C. and Frassl, Marieke A. and Arhonditsis, George B. and Gal, Gideon and Hamilton, David P. and Hanson, Paul C. and Hetherington, Amy L. and Melack, John M. and Read, Jordan S. and Rinke, Karsten and Rigosi, Anna and Trolle, Dennis and Winslow, Luke and Adrian, Rita and Ayala, Ana I. and Bocaniov, Serghei A. and Boehrer, Bertram and Boon, Casper and Brookes, Justin D. and Bueche, Thomas and Busch, Brendan D. and Copetti, Diego and Cortés, Alicia and de Eyto, Elvira and Elliott, J. Alex and Gallina, Nicole and Gilboa, Yael and Guyennon, Nicolas and Huang, Lei and Kerimoglu, Onur and Lenters, John D. and MacIntyre, Sally and Makler-Pick, Vardit and McBride, Chris G. and Moreira, Santiago and Özkundakci, Deniz and Pilotti, Marco and Rueda, Francisco J. and Rusak, James A. and Samal, Nihar R. and Schmid, Martin and Shatwell, Tom and Snorthheim, Craig and Soulignac, Frédéric and Valerio, Giulia and van der Linden, Leon and Vetter, Mark and Vinçon-Leite, Brigitte and Wang, Junbo and Weber, Michael and Wickramaratne, Chaturangi and Woolway, R. Iestyn and Yao, Huaxia and Hipsey, Matthew R.}}, booktitle = {{Environmental modelling & software with environment data news }}, issn = {{1873-6726}}, keywords = {{Lake model, Stratification, GLM, Model assessment, Global observatory data, Network science}}, number = {{4}}, pages = {{274--291}}, publisher = {{Elsevier Science}}, title = {{{A multi-lake comparative analysis of the General Lake Model (GLM): Stress-testing across a global observatory network}}}, doi = {{10.1016/j.envsoft.2017.11.016}}, volume = {{102}}, year = {{2018}}, } @inbook{9924, author = {{Maas, Klaus and Wrenger, Burkhard}}, booktitle = {{25 Jahre Forschungsschwerpunkt Kulturlandschaft}}, editor = {{Riedl, Ulrich and Herber, Katrin and Lohr, Mathias and Eller-Studzinsky, Bettina}}, pages = {{60--63}}, title = {{{Fernerkundung und Drohnen als Analyse-Werkzeuge in der Kulturlandschaft}}}, year = {{2018}}, } @proceedings{10631, editor = {{Atzenbeck, Claus and Rubart, Jessica}}, isbn = {{978-1-4503-5658-9}}, location = {{Baltimore, Towson University, USA}}, publisher = {{Association for Computing Machinery (ACM)}}, title = {{{Proceedings of the 1st Workshop on Human Factors in Hypertext (HUMAN'18)}}}, doi = {{10.1145/3215611}}, year = {{2018}}, } @article{3085, author = {{Fettig, Joachim and Austermann-Haun, Ute and Liebe, H. and Meier, J. F. and Busch, A. and Gilbert, E.}}, journal = {{gwf - Wasser + Abwasser}}, number = {{September}}, pages = {{65 -- 79}}, title = {{{Möglichkeiten und Grenzen der Behandlung von Prozesswässern aus der Hydrothermalen Carbonisierung}}}, year = {{2018}}, } @inbook{5056, author = {{Fettig, Joachim and Austermann-Haun, Ute and Liebe, H. and Meier, J.F. and Busch, A. and Gilbert, E.}}, booktitle = {{Abwassertechnik und Kläranlagen 2018/2019}}, editor = {{Runge, Hella}}, pages = {{53--67}}, publisher = {{Vulkan-Verlag}}, title = {{{Möglichkeiten und Grenzen der Behandlung von Prozesswässern aus der Hydrothermalen Carbonisierung}}}, year = {{2018}}, } @article{5058, author = {{Le, Thi Thu Huyen and Fettig, Joachim and Meon, Günter}}, issn = {{1642-3593}}, journal = {{Ecohydrology & Hydrobiology}}, number = {{19}}, pages = {{54--65}}, title = {{{Kinetics and simulation of nitrification at various pH values of a polluted river in the tropics}}}, doi = {{10.1016/j.ecohyd.2018.06.006}}, year = {{2018}}, } @misc{12856, abstract = {{Multimodal interfaces provide users with a number of different ways of interacting with a system. This paper proposes the integration of an explicit interaction model as an extension of the well-known MVC architectural pattern. It builds upon previous extensions regarding explicit structure, user interface (UI), and environmental models. In addition, this paper proposes an explicit UI layer in a service-oriented hypermedia infrastructure to address requirements from multimodal interfaces.}}, author = {{Rubart, Jessica}}, booktitle = {{Proceedings of the 1st Workshop on Human Factors in Hypertext}}, editor = {{Atzenbeck, Claus}}, isbn = {{978-1-4503-5658-9}}, keywords = {{Multimodal interaction, hypermedia structures, hypertext infrastructure, structure model, interaction model, MVC, digital boardroom}}, location = {{Baltimore, MD}}, pages = {{17--21}}, publisher = {{ACM}}, title = {{{Multimodal Interaction with Hypermedia Structures}}}, doi = {{10.1145/3215611.3215613}}, year = {{2018}}, } @misc{12238, abstract = {{Phytoplankton growth depends not only on mean intensity but also on the dynamics of the light supply. In surface mixed layers, phytoplankton may rapidly move between strong light and almost darkness. The nonlinear light‐dependency of growth may differ between constant and fluctuating light because of the different frequency distribution of light and/or acclimation processes. The present study compares for the first time light‐dependency of photosynthesis and growth of phytoplankton communities in situ under defined mixing conditions and at fixed depths. Maximum growth rates per day were not significantly different, but the growth efficiency was much higher under constant light than under fluctuating light of sub‐saturating daily irradiance. Phytoplankton incubated under fluctuating light needed about three times higher mean daily irradiances to balance photosynthesis and losses than under constant light. The difference in growth efficiency was mostly caused by the different frequency distribution of underwater light, as was estimated by a photosynthesis model of sufficient temporal resolution. The present study indicates a considerable overestimation of phytoplankton growth at sub‐saturating light in well‐mixed water layers by the common growth measurements under constant light. This implies an underestimation of the compensation light intensities and respective overestimations of the critical mixing depths.}}, author = {{Köhler, Jan and Wang, Lan and Guislain, Alexis and Shatwell, Tom}}, booktitle = {{Limnology and Oceanography}}, issn = {{1939-5590}}, number = {{3}}, pages = {{1156--1167}}, publisher = {{Wiley}}, title = {{{Influence of vertical mixing on light‐dependency of phytoplankton growth}}}, doi = {{10.1002/lno.10761}}, volume = {{63}}, year = {{2017}}, } @misc{12240, abstract = {{The hydrology of the lake-rich Tibetan Plateau is important for the global climate, yet little is known about the thermal regime of Tibetan lakes due to scant data. We (i) investigated the characteristic seasonal temperature patterns and recent trends in the thermal and stratification regimes of lakes on the Tibetan Plateau and (ii) tested the performance of the one-dimensional lake parameterization scheme FLake for the Tibetan lake system. For this purpose, we combined 3 years of in situ lake temperature measurements, several decades of satellite observations, and the global reanalysis data. We chose the two largest freshwater Tibetan lakes, Ngoring and Gyaring, as study sites. The lake model FLake faithfully reproduced the specific features of the high-altitude lakes and was subsequently applied to reconstruct the vertically resolved heat transport in both lakes during the last 4 decades. The model suggested that Ngoring and Gyaring were ice-covered for about 6 months and stratified in summer for about 4 months per year with a short spring overturn and a longer autumn overturn. In summer the surface mixed boundary layer extended to 6–8 m of depth and was about 20 % shallower in the more turbid Gyaring. The thermal regime of the transparent Ngoring responded more strongly to atmospheric forcing than Gyaring, where the higher turbidity damped the response. According to the reanalysis data, air temperatures and humidity have increased, whereas solar radiation has decreased, since the 1970s. Surprisingly, the modeled mean lake temperatures did not change, nor did the phenology of the ice cover or stratification. Lake surface temperatures in summer increased only marginally. The reason is that the increase in air temperature was offset by the decrease in radiation, probably due to increasing humidity. This study demonstrates that air temperature trends are not directly coupled to lake temperatures and underscores the importance of shortwave radiation for the thermal regime of high-altitude lakes.}}, author = {{Kirillin, Georgiy and Wen, Lijuan and Shatwell, Tom}}, booktitle = {{Hydrology and earth system sciences : HESS }}, issn = {{1607-7938}}, number = {{4}}, pages = {{1895--1909}}, publisher = {{Copernicus GmbH}}, title = {{{Seasonal thermal regime and climatic trends in lakes of the Tibetan highlands}}}, doi = {{10.5194/hess-21-1895-2017}}, volume = {{21}}, year = {{2017}}, } @misc{12241, abstract = {{Climate forecasts project a global increase in extreme weather events, but information on the consequences for ecosystems is scarce. Of particular significance for lakes are severe storms that can influence biogeochemical processes and biological communities by disrupting the vertical thermal structure during periods of stratification. An exceptional storm passing over northern Germany in July 2011 provided an opportunity to assess the consequences and underlying mechanisms of such extreme events on the interplay between the physics and ecological characteristics of a deep, nutrient-poor lake. Wind speeds were among the most extreme on record. A suite of variables measured throughout the event consistently indicates that a cascade of processes pushed the clear-water lake into an exceptionally turbid state. Specifically, thermocline deepening by the storm-entrained cyanobacteria of a deep chlorophyll maximum located at about 8 m depth into the surface mixed layer. Released from light limitation, intense photosynthesis of the cyanobacteria boosted primary production, increased algal biomass, raised the pH and thus induced massive calcite precipitation to a level never observed within three decades of lake monitoring. As a consequence, water transparency dropped from 6.5 to 2.1 m, the minimum on record for 40 years, and the euphotic zone shrank by about 8 m for several weeks. These results show that cyanobacterial blooms not only are promoted by climate warming, but can also be triggered by extreme storms. Clear-water lakes developing a deep chlorophyll maximum appear to be particularly at risk in the future, if such events become more intense or frequent.}}, author = {{Kasprzak, Peter and Shatwell, Tom and Gessner, Mark O. and Gonsiorczyk, Thomas and Kirillin, Georgiy and Selmeczy, Géza and Padisák, Judit and Engelhardt, Christof}}, booktitle = {{Ecosystems}}, issn = {{1435-0629}}, number = {{8}}, pages = {{1407--1420}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{Extreme Weather Event Triggers Cascade Towards Extreme Turbidity in a Clear-water Lake}}}, doi = {{10.1007/s10021-017-0121-4}}, volume = {{20}}, year = {{2017}}, } @misc{3741, author = {{Fettig, Joachim and Liebe, H. and Busch, A. and Austermann-Haun, Ute and Meier, J. F.}}, publisher = {{Deutsche Bundesstiftung Umwelt}}, title = {{{Entwicklung eines technischen Verwertungs- und Entsorgungskonzeptes für HTC-Prozesswasser}}}, year = {{2017}}, } @inbook{7921, author = {{Londong, Jörg and Giese, Thomas and Oldenburg, Martin}}, booktitle = {{Wasserinfrastrukturen für die zukunftsfähige Stadt, Beiträge aus der INIS-Forschung}}, editor = {{Libbe, Jens and Bock, Stephanie and Nickel, Darla and Langer, Margarethe and Wilhelm, Christian}}, pages = {{104 -- 107}}, publisher = {{Difu}}, title = {{{Stoffliche und energetische Nutzung der Teilströme in KREIS und ihre Umsetzung im Stadtquartier Jenfelder Au}}}, year = {{2017}}, } @inbook{7922, author = {{Winker, Martina and Giese, Thomas and Libbe, Jörg and Oldenburg, Martin and Schramm, Engelbert}}, booktitle = {{Wasserinfrastrukturen für die zukunftsfähige Stadt, Beiträge aus der INIS-Forschung}}, editor = {{Libbe, Jens and Bock, Stephanie and Nickel, Darla and Langer, Margarethe and Wilhelm, Christian}}, pages = {{134 -- 139}}, publisher = {{Difu}}, title = {{{Probleme und Stolpersteine beim Umsetzen neuartiger Wasserinfrastrukturen: Diskrepanzen zwischen Theorie und Praxis }}}, year = {{2017}}, } @misc{7923, author = {{Oldenburg, Martin}}, booktitle = {{Korrespondenz Abwasser}}, issn = {{1866-0010}}, number = {{12}}, pages = {{1074 -- 1082}}, publisher = {{DWA - Deutsche Vereinigung für Wasserwirtschaft, Abwasser und Abfall e. V.}}, title = {{{Neuartige Sanitärsysteme (NASS) - Eine Bilanzierung von Nährstoffen, Energieverbrauch und CO2-Emissionen }}}, volume = {{64}}, year = {{2017}}, } @inproceedings{682, abstract = {{Well-designed interactive visualizations help users gaining insights into an organization's data and, finally, making decisions. In the Business Intelligence (BI) context, the most popular visualization approach is dashboards, which combine multiple visual components, such as charts, on a single view. Well-founded decisions require the collaboration of several analysts, such as domain experts, line-of-business managers, or key suppliers. For face-to-face collaboration settings, multi-display environments and smart meeting rooms have improved. In the BI context, support for boardrooms is being discussed for this setting. In this paper, we propose annotation dashboards, based on a multitouch and multiuser interaction approach, which are integrated in a multi-display environment constituting a BI digital boardroom. In addition, means of semantic navigation help business users to easily get insights into business context information.}}, author = {{Rubart, Jessica and Lietzau, Benjamin and Soehlke, Patrick and Alex, Bastian and Becker, Stephan and Wienboeker, Tim}}, booktitle = {{2017 IEEE 11th International Conference on Semantic Computing (ICSC)}}, isbn = {{978-1-5090-4285-2 }}, keywords = {{Semantics, Data visualization, Navigation, Collaboration, Context, Business intelligence, Digital Boardroom, Multitouch and Multiuser Interaction}}, location = {{San Diego, CA, USA}}, publisher = {{IEEE}}, title = {{{Semantic Navigation and Discussion in a Digital Boardroom}}}, doi = {{10.1109/icsc.2017.39}}, year = {{2017}}, } @proceedings{10634, editor = {{Rubart, Jessica and Yesilada, Yeliz}}, location = {{Prague, Czech Republic}}, publisher = {{CEUR-WS.org}}, title = {{{Hypertext 2017 Extended Proceedings}}}, year = {{2017}}, } @article{3057, author = {{Meier, J. F. and Austermann-Haun, Ute and Fettig, Joachim and Liebe, H. and Wichern, M.}}, journal = {{Water Science & Technology}}, number = {{8}}, pages = {{2065 -- 2074}}, title = {{{Operation of anaerobic filter compared with an anaerobic moving bed bioreactor for the treatment of waste water from hydrothermal carbonization of fine mulch}}}, volume = {{76}}, year = {{2017}}, } @article{5054, author = {{Fettig, Joachim and Pick, Volker and Liebe, H.}}, journal = {{Wat. Sci. Tech.}}, number = {{9}}, pages = {{2056--2063}}, title = {{{Particle separation from road runoff by a decentralised lamella system – laboratory tests and experiences in the field}}}, volume = {{75 }}, year = {{2017}}, } @article{5055, author = {{Meon, G. and Fettig, Joachim and Phuoc, N.V.}}, journal = {{Hydrologie und Wasserbewirtschaftung }}, number = {{6}}, pages = {{368--369}}, title = {{{Forschungskooperation mit Vietnam – das BMBF-Verbundvorhaben EWATEC-COAST}}}, volume = {{61}}, year = {{2017}}, } @misc{12242, abstract = {{Hutchinson and Löffler's (1956) classification of lakes based on the seasonal thermal mixing regime has become a cornerstone of any analysis of lakes as elements of the earth surface. Until now however the lake classification has lacked a physically sound quantitative criterion distinguishing between two fundamental lake types: thermally stratified during a large portion of the year (mono- and dimictic) and predominantly mixed to the bottom (polymictic). Using the mechanistic balance between potential and kinetic energy we review the different formulations of the Richardson number to derive a generalized scaling for seasonal stratification in a closed lake basin. The scaling parameter is the critical mean basin depth, Hcrit, that delineates lakes that mix regularly from those that stratify seasonally based on lake water transparency, lake length, and an annual mean estimate for the Monin-Obukhov length. We validate the scaling on available data of lakes worldwide using logistic regression. The scaling criterion consistently described the mixing regime significantly better than either the conventional unbounded basin scaling or a simple depth threshold. Thus, the generalized scaling is universal for freshwater lakes and allows the seasonal mixing regime to be estimated without numerically solving the heat transport equations.}}, author = {{Kirillin, G. and Shatwell, Tom}}, booktitle = {{Earth-Science Reviews}}, issn = {{0012-8252}}, keywords = {{Richardson number, Lake classification, Seasonal stratification, Dimixis, Polymixis, Water transparency, Lake databases, Lake modeling, Secchi depth}}, pages = {{179--190}}, publisher = {{Elsevier BV}}, title = {{{Generalized scaling of seasonal thermal stratification in lakes}}}, doi = {{10.1016/j.earscirev.2016.08.008}}, volume = {{161}}, year = {{2016}}, } @misc{12243, abstract = {{Water transparency affects the thermal structure of lakes and within certain lake depth ranges, it can determine whether a lake mixes regularly (polymictic regime) or stratifies continuously (dimictic regime) from spring through summer. Phytoplankton biomass can influence transparency but the effect of its seasonal pattern on stratification is unknown. Therefore we analysed long term field data from two lakes of similar depth, transparency and climate but one polymictic and one dimictic and simulated a conceptual lake with a hydrodynamic model. Transparency in the study lakes was typically low during spring and summer blooms and high in between during the clear water phase (CWP), caused when zooplankton graze the spring bloom. The effect of variability of transparency on thermal structure was stronger at intermediate transparency and stronger during a critical window in spring when the rate of lake warming is highest. Whereas the spring bloom strengthened stratification in spring, the CWP weakened it in summer. The presence or absence of the CWP influenced stratification duration and under some conditions determined the mixing regime. Therefore seasonal plankton dynamics, including biotic interactions that suppress the CWP, can influence lake temperatures, stratification duration and potentially also the mixing regime.}}, author = {{Shatwell, Tom and Adrian, Rita and Kirillin, Georgiy}}, booktitle = {{Scientific Reports}}, issn = {{2045-2322}}, number = {{1}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{Planktonic events may cause polymictic-dimictic regime shifts in temperate lakes}}}, doi = {{10.1038/srep24361}}, volume = {{6}}, year = {{2016}}, } @book{3762, abstract = {{Das vorliegende Buch vermittelt die Grundlagen zur Berechnung von Kälteanlagen und Wärmepumpen. Hierzu zählen - die Bemessung von Kühllasten, - die Auswahl von Verfahren und Kältemitteln und - die Berechnung der erforderlichen Komponenten. Zusammenhänge werden verständlich hergeleitet und anhand eingehender Praxisbeispiele erörtert. Die Gliederung des Buches folgt einer klaren didaktischen Linie. Aus dem Abkühlverhalten verschiedener Stoffe wird auf Kälteverfahren unterschiedlicher Komplexität und schließlich auf das Thema Wärmeübertragung übergeleitet. Der Schwierigkeitsgrad der basierenden thermodynamischen Konzepte wird dabei stufenweise gesteigert. Das Buch eignet sich daher auch zum Selbststudium.}}, author = {{Dohmann, Joachim}}, isbn = {{978-3-662-49109-6}}, keywords = {{Kühllast, Atmungswärme, Phasenumwandlung, Kaltgasprozess, Stirling, Kaltdampfprozess, Kälteanlagen, Kaskadenschaltung, Wärmepumpen, Verdampfer, Verflüssiger, Kältekompressor, Kälteträger, Wärmeübertrager, Wärmequellen, Kältetransport, Kälte, Dimensionierung von Anlagen, Projektierung von Anlagen, Spezifizierung von Apparaten}}, pages = {{264}}, publisher = {{Springer Vieweg}}, title = {{{ Thermodynamik der Kälteanlagen und Wärmepumpen : Grundlagen und Anwendungen der Kältetechnik}}}, doi = {{10.1007/978-3-662-49110-2}}, year = {{2016}}, } @misc{7920, author = {{Londong, Jörg and Giese, Thomas and Oldenburg, Martin}}, booktitle = {{Korrespondenz Abwasser}}, issn = {{1866-0010}}, number = {{11}}, pages = {{968 -- 974}}, publisher = {{DWA - Deutsche Vereinigung für Wasserwirtschaft, Abwasser und Abfall e. V.}}, title = {{{KREIS - Ergebnisse für die Übertragbarkeit in die Praxis }}}, year = {{2016}}, } @misc{7924, author = {{Oldenburg, Martin and To, Kieu-Anh}}, booktitle = {{Workshop "Entwicklung von Lernmaterialien für Studierende"}}, location = {{TH Georg Simon Ohm, Nürnberg}}, title = {{{Von Fehlern anderer Lernen }}}, year = {{2016}}, } @proceedings{10635, editor = {{Blustein, Jamie and Herder, Eelco and Rubart, Jessica and Ashman, Helen}}, isbn = {{978-1-4503-4247-6}}, location = {{Halifax, Canada}}, publisher = {{Association for Computing Machinery (ACM)}}, title = {{{Proceedings of the 27th ACM Conference on Hypertext and Social Media (HT'16)}}}, doi = {{10.1145/2914586}}, year = {{2016}}, } @article{5053, abstract = {{Treatment of wastewater from a tannery in Greater Ho Chi Minh City (Vietnam) was investigated on a pilot scale. After pre-treatment by the tannery that included batch-coagulation and sedimentation, the wastewater was treated by dissolved air flotation, a membrane bioreactor (MBR) and granular activated carbon (GAC) for polishing the MBR effluent. The average removal efficiency for organic substances in the MBR was 81% while total nitrogen could only be removed by 36%. The performance of the GAC column could be successfully predicted using adsorption parameters determined in laboratory experiments. A larger proportion of the organics in the MBR effluent was only weakly adsorbable, therefore the usable carbon capacity was limited as confirmed by the modelling approach. The results were used to outline the size of a technical plant with a volumetric loading rate of 3 kg COD/(m3*d) for the MBR and a specific carbon demand of about 1.8 kg/m3.}}, author = {{Fettig, Joachim and Pick, V. and Oldenburg, Martin and Phuoc, N. V.}}, issn = {{2220-1319}}, journal = {{Journal of Water Reuse and Desalination}}, number = {{4}}, pages = {{420--428}}, title = {{{Treatment of tannery wastewater for reuse by physico-chemical processes and a membrane bioreactor}}}, doi = {{10.2166/wrd.2016.036}}, volume = {{7}}, year = {{2016}}, } @misc{12244, abstract = {{In this paper the concept of resilience is discussed on the base of 13 case studies from the German branch of the International Long-Term Ecological Research Program. In the introduction the resilience approach is presented as one possibility to describe ecosystem dynamics. The relations with the concepts of adaptability and ecological integrity are discussed and the research questions are formulated. The focal research objectives are related to the conditions of resilient behaviour of ecosystems, the role of spatio-temporal scales, the differences between short- or long-term dynamics, the basic methodological requirements to exactly define resilience, the role of the reference state and indicators and the suitability of resilience as a management concept. The main part of the paper consists of 13 small case study descriptions, which demonstrate phase transitions and resilient dynamics of several terrestrial and aquatic ecosystems at different time scales. In the discussion, some problems arising from the interpretation of the time series are highlighted and discussed. The topics of discussion are the conceptual challenges of the resilience approach, methodological problems, the role of indicator selection, the complex interactions between different disturbances, the significance of time scales and a comparison of the case studies. The article ends with a conclusion which focuses on the demand to link resilience with adaptability, in order to support the long-term dynamics of ecosystem development.}}, author = {{Müller, F. and Bergmann, M. and Dannowski, R. and Dippner, J.W. and Gnauck, A. and Haase, P. and Jochimsen, Marc C. and Kasprzak, P. and Kröncke, I. and Kümmerlin, R. and Küster, M. and Lischeid, G. and Meesenburg, H. and Merz, C. and Millat, G. and Müller, J. and Padisák, J. and Schimming, C.G. and Schubert, H. and Schult, M. and Selmeczy, G. and Shatwell, Tom and Stoll, S. and Schwabe, M. and Soltwedel, T. and Straile, D. and Theuerkauf, M.}}, booktitle = {{ Ecological indicators : integrating monitoring, assessment and management}}, issn = {{1872-7034}}, keywords = {{Long-term ecological research, LTER, Ecosystem resilience and adaptability, Spatio-temporal scales, Indicator selection}}, number = {{6}}, pages = {{10--43}}, publisher = {{Elsevier BV}}, title = {{{Assessing resilience in long-term ecological data sets}}}, doi = {{10.1016/j.ecolind.2015.10.066}}, volume = {{65}}, year = {{2015}}, } @misc{12245, abstract = {{Rewetting of long-term drained fens often results in the formation of eutrophic shallow lakes with an average water depth of less than 1 m. This is accompanied by a fast vegetation shift from cultivated grasses via submerged hydrophytes to helophytes. As a result of rapid plant dying and decomposition, these systems are highly dynamic wetlands characterised by a high mobilisation of nutrients and elevated emissions of CO2 and CH4. However, the impact of specific plant species on these phenomena is not clear. Therefore we investigated the CO2 and CH4 production due to the subaqueous decomposition of shoot biomass of five selected plant species which represent different rewetting stages (Phalaris arundinacea, Ceratophyllum demersum, Typha latifolia, Phragmites australis and Carex riparia) during a 154 day mesocosm study. Beside continuous gas flux measurements, we performed bulk chemical analysis of plant tissue, including carbon, nitrogen, phosphorus and plant polymer dynamics. Plant-specific mass losses after 154 days ranged from 25% (P. australis) to 64% (C. demersum). Substantial differences were found for the CH4 production with highest values from decomposing C. demersum (0.4 g CH4 kg−1 dry mass day) that were about 70 times higher than CH4 production from C. riparia. Thus, we found a strong divergence between mass loss of the litter and methane production during decomposition. If C. demersum as a hydrophyte is included in the statistical analysis solely nutrient contents (nitrogen and phosphorus) explain varying greenhouse gas production of the different plant species while lignin and polyphenols demonstrate no significant impact at all. Taking data of annual biomass production as important carbon source for methanogens into account, high CH4 emissions can be expected to last several decades as long as inundated and nutrient-rich conditions prevail. Different restoration measures like water level control, biomass extraction and top soil removal are discussed in the context of mitigation of CH4 emissions from rewetted fens.}}, author = {{Zak, D. and Reuter, H. and Augustin, J. and Shatwell, Tom and Barth, M. and Gelbrecht, J. and McInnes, R. J.}}, booktitle = {{Biogeosciences}}, issn = {{1726-4189}}, number = {{8}}, pages = {{2455--2468}}, publisher = {{Copernicus GmbH}}, title = {{{Changes of the CO2 and CH4 production potential of rewetted fens in the perspective of temporal vegetation shifts }}}, doi = {{10.5194/bg-12-2455-2015}}, volume = {{12}}, year = {{2015}}, } @article{3094, author = {{Fettig, Joachim and Austermann-Haun, Ute and Liebe, H. and Meier, J. F. and Wichern, M.}}, journal = {{KA Korrespondenz Abwasser Abfall}}, number = {{6}}, pages = {{529 -- 536}}, title = {{{Ein Konzept zur Behandlung von Prozesswässern aus der Hydrothermalen Carbonisierung }}}, volume = {{62}}, year = {{2015}}, } @article{5052, author = {{Fettig, Joachim and Liebe, H.}}, journal = {{Wat. Sci. Tech. }}, number = {{1}}, pages = {{77--83}}, title = {{{Modelling GAC adsorption of biologically pre-treated process water from hydrothermal carbonization}}}, volume = {{72}}, year = {{2015}}, } @misc{12246, abstract = {{In lakes, trophic change and climate change shift the relationship between nutrients and physical factors, like temperature and photoperiod, and interactions between these factors should affect the growth of phytoplankton species differently. We therefore determined the relationship between P-limited specific growth rates and P-quota (biovolume basis) of Stephanodiscus minutulus and Nitzschia acicularis (diatoms) at or near light saturation in axenic, semi-continuous culture at 10, 15 and 20 °C and at 6, 9 and 12 h d−1 photoperiod. Photoperiod treatments were performed at constant daily light exposure to allow comparison. Under these conditions, we also performed competition experiments and estimated relative P-uptake rates of the species. Temperature strongly affected P-limited growth rates and relative P uptake rates, whereas photoperiod only affected maximum growth rates. S. minutulus used internal P more efficiently than N. acicularis. N. acicularis was the superior competitor for P due to a higher relative uptake rate and its superiority increased with increasing temperature and photoperiod. S. minutulus conformed to the Droop relationship but N. acicularis did not. A model with a temperature-dependent normalised half-saturation coefficient adequately described the factor interactions of both species. The temperature dependence of the quota model reflected each species’ specific adaptation to its ecological niche. The results demonstrate that increases in temperature or photoperiod can partially compensate for a decrease in P-quota under moderately limiting conditions, like during spring in temperate lakes. Thus warming may counteract de-eutrophication to some degree and a relative shift in growth factors can influence the phytoplankton species composition.}}, author = {{Shatwell, Tom and Köhler, Jan and Nicklisch, Andreas}}, booktitle = {{PLoS ONE}}, issn = {{1932-6203}}, number = {{7}}, publisher = {{Public Library of Science (PLoS)}}, title = {{{Temperature and Photoperiod Interactions with Phosphorus-Limited Growth and Competition of Two Diatoms}}}, doi = {{10.1371/journal.pone.0102367}}, volume = {{9}}, year = {{2014}}, } @article{5038, author = {{Büdicker, K. and Deister, U. and Fettig, Joachim and Glinka, U. and Götz, M. and Rudolph, B.}}, journal = {{VDI UmweltMagazin }}, pages = {{3}}, title = {{{10 Jahre Treffen der Umwelttechnikstudiengänge}}}, volume = {{44}}, year = {{2014}}, } @inbook{5061, author = {{Fettig, Joachim and Pick, Volker}}, booktitle = {{Contributions by EWATEC-COAST to 4th International Conference for Environment and National Resources, ICENR 2014}}, editor = {{Meon, G.}}, pages = {{194--203}}, publisher = {{Cuvillier}}, title = {{{Treatment of Tannery Wastewater by Enhanced Biological Processes – Preliminary Results}}}, year = {{2014}}, } @misc{12247, abstract = {{When severely degraded fens are rewetted, they often become shallow lakes with an average water depth of less than 1 m. The additional high nutrient availability in highly decomposed peat soils of these newly formed ecosystems favours the fast establishment of a small number of helophytes while the return of lost target species like low sedges and brown mosses could be delayed for decades. We hypothesise that the phosphorus (P) uptake of the newly developed vegetation substantially influences the P cycle in rewetted fens. Therefore, we investigated how much of the P released in upper degraded peat soils is pumped across the redox-interface between the soil and surface water (=‘P barrier’) during the growing season (∼150 days) by six helophytes (Phragmites australis, Typha latifolia, Glyceria maxima, Carex acutiformis, Carex riparia, and Phalaris arundinacea) in five rewetted fens. We then assessed how this would affect the different plant-available P fractions in the rooted degraded peat layers. The highest P uptake during the growing season (duration 150 days from May to September) was recorded for T. latifolia and G. maxima (3.0 and 2.8 g m−2, respectively). Overall, the P uptake was in the range of the P mobilisation rates we measured in highly decomposed peat soils (range: 0.8–15.6 g P m−2, n = 30), but four to 10-fold higher than diffusive net P fluxes at the interface between soil and surface water. Accordingly, helophytes are able to compensate for the high P mobilisation in degraded peat soils during the growing season, by incorporating this P into biomass. On the other hand a large part of the plant-P stock is released after die back through leaching and mineralisation, which increases the P load of these newly formed shallow lakes and possibly also of adjacent water courses. We estimated that it would still take 20–50 years to exhaust the large pool of plant-available P in highly decomposed peat soils if aboveground biomass was removed. Without any further management apart from fen rewetting it is unlikely that the fens will return to low nutrient levels within a human life time.}}, author = {{Zak, Dominik and Gelbrecht, Jörg and Zerbe, Stefan and Shatwell, Tom and Barth, Martin and Cabezas, Alvaro and Steffenhagen, Peggy}}, booktitle = {{Ecological Engineering}}, issn = {{0925-8574}}, keywords = {{Leaching, Phosphorus retention, Phragmites australis, Top soil removal, Redox interface, Rewetting}}, number = {{5}}, pages = {{82--90}}, publisher = {{Elsevier BV}}, title = {{{How helophytes influence the phosphorus cycle in degraded inundated peat soils – Implications for fen restoration}}}, doi = {{10.1016/j.ecoleng.2013.10.003}}, volume = {{66}}, year = {{2013}}, } @misc{12248, abstract = {{Diatoms often dominate temperate lakes and rivers in spring, when increasing temperature and daylength coincide with decreasing silicate concentrations. Since interactions between these factors may be important, we cultivated Stephanodiscus minutulus and Nitzschia acicularis (freshwater diatoms) under silicon limitation at different temperatures and photoperiods in continuous and batch culture. The Monod parameters of Si-limited growth indicated that S. minutulus should be superior under Si limitation. The type of interaction between silicate, temperature and photoperiod differed between species and indicated that the advantage of S. minutulus increases under low temperatures and photoperiods. Competition experiments in semicontinuous culture confirmed these predictions and were described accurately with a model of factor interactions. Multiple regression analysis of field data from a shallow eutrophic lake showed that dissolved silicate (DSi), temperature, photoperiod and total phosphorus (TP) were the most important predictors of spring centric diatom biovolume, where lower temperatures and photoperiods favour this group and higher biovolumes coincide with DSi depletion and higher TP. Pennate diatoms depended more on light, winter population size and grazer abundance. Conditions in situ suggested that factor interactions play a role during spring under strong Si limitation. We propose that the type of interaction reflects specific niche adaptation. Understanding interactions between physical factors and nutrients will increase our understanding of phytoplankton diversity and predictive accuracy of phytoplankton dynamics including combined effects of climate and trophic change.}}, author = {{Shatwell, Tom and Köhler, Jan and Nicklisch, Andreas}}, booktitle = {{Journal of Plankton Research}}, issn = {{1464-3774}}, number = {{5}}, pages = {{957--971}}, publisher = {{Oxford University Press (OUP)}}, title = {{{Temperature and photoperiod interactions with silicon-limited growth and competition of two diatoms}}}, doi = {{10.1093/plankt/fbt058}}, volume = {{35}}, year = {{2013}}, } @misc{12249, abstract = {{We investigated the combined effects of thermal pollution from a nuclear power plant (NPP) and regional climate warming on the thermal regime of a lake. For this purpose, we used the lake model FLake and analyzed 50 years of temperature data from Lake Stechlin, Germany, which served as the cooling water reservoir for the Rheinsberg NPP from 1966 until 1990. Both modeling and statistical data analysis revealed a strong influence of the NPP cooling water discharge on the lake water temperatures and the vertical stability of the water column. A remarkable effect of thermal pollution consisted of strong vertical mixing in winter produced by the discharge of warm water into the lake when ambient water temperatures were below 4 °C. This effect caused a significant increase in the deep hypolimnion temperatures and a corresponding decrease of the vertical stability in the summer. In turn, climate warming had the opposite effect on the summer stability by increasing lake surface temperatures. Both the thermal pollution and climate change increased the duration of the summer stratification period. Our results suggest that industrial thermal pollution in temperate lakes during winter is stored in the deep water column until the next winter, whereas heat added in the summer dissipates relatively rapidly into the atmosphere. Accordingly, the winter thermal pollution could have a long-lasting effect on the lake ecology by affecting benthic biogeochemical processes.}}, author = {{Kirillin, Georgiy and Shatwell, Tom and Kasprzak, Peter}}, booktitle = {{Journal of Hydrology}}, issn = {{1879-2707}}, keywords = {{Industrial thermal pollution, Global warming, Lake stratification, FLake model}}, number = {{7}}, pages = {{47--56}}, publisher = {{Elsevier BV}}, title = {{{Consequences of thermal pollution from a nuclear plant on lake temperature and mixing regime}}}, doi = {{10.1016/j.jhydrol.2013.05.023}}, volume = {{496}}, year = {{2013}}, } @misc{3745, author = {{Fettig, Joachim and Liebe, H. and Austermann-Haun, Ute and Meier, J. F.}}, publisher = {{Deutsche Bundesstiftung Umwelt}}, title = {{{Verwertung des Prozesswassers aus der hydrothermalen Carbonisierung von organischen Abfällen}}}, year = {{2013}}, } @article{3059, author = {{Fettig, Joachim and Pick, Volker and Austermann-Haun, Ute and Blumberg, M. and Phuoc, N. V.}}, journal = {{Water Science & Technology}}, number = {{6}}, pages = {{1264 -- 1270}}, title = {{{Treatment of tapioca starch wastewater by a novel combination of physical and biological processes}}}, volume = {{68}}, year = {{2013}}, } @inproceedings{3103, author = {{Austermann-Haun, Ute and Meier, J. F. and Wichern, M. and Fettig, Joachim Hans Otto and Liebe, H.}}, booktitle = {{IndustrieTage – Wassertechnik - Tagungsband}}, location = {{Fulda}}, pages = {{37 -- 47}}, title = {{{Anaerobe Behandlung von Prozesswässern aus der Hydrothermalen Carbonisierung}}}, year = {{2013}}, } @inbook{5036, author = {{Fettig, Joachim and Liebe, H.}}, booktitle = {{Initiativen zum Umweltschutz}}, editor = {{Grimm, C.}}, pages = {{115--130}}, publisher = {{Erich-Schmidt-Verlag}}, title = {{{Analytik und physikalisch-chemische Behandlung von Prozesswässern aus der hydrothermalen Carbonisierung von organischen Abfällen – erste Ergebnisse}}}, volume = {{87}}, year = {{2013}}, } @inproceedings{5037, author = {{Meon, G. and Le, T.T.H. and Fettig, Joachim and Nguyen, P.}}, location = {{Ho Chi Minh City}}, title = {{{Water pollution management in the vicinity of the Lower Mekong Basin: German-Vietnamese research projects “TAPIOCA” and “EWATEC-Coast” }}}, year = {{2013}}, } @misc{12250, abstract = {{We measured specific growth rates of Stephanodiscus minutulus, Nitzschia acicularis (diatoms), and Limnothrix redekei (cyanobacterium) under fluctuating and constant light in semi-continuous culture at 10°C, 15°C, and 20°C and under photoperiods of 6 h d−1 and 12 h d−1. Fluctuating light regimes simulated regular vertical mixing in lakes with a ratio of euphotic to mixed depth (zeu : zmix) of 1 and 0.5 on a cloudless day. Light fluctuations at zeu : zmix = 1 decreased the growth rates of S. minutulus, N. acicularis, and L. redekei by 18%, 33%, and 29%, respectively, compared to constant light at the same daily light supply. Temperature had no effect on this decrease. Halving zeu : zmix (simulating deep mixing) had the same effect on growth as halving the photoperiod, demonstrating that these factors are cumulative. We introduce a simple empirical factor to adjust growth rates measured under constant light to account for fluctuating light. This factor is independent of temperature and photoperiod, applies over a range of zeu : zmix, and accurately describes present and published growth rates of several species. We show how to account for temporal variability of the light supply at different temperatures and photoperiods when predicting growth rates of phytoplankton.}}, author = {{Shatwell, Tom and Nicklisch, Andreas and Köhler, Jan}}, booktitle = {{Limnology and Oceanography}}, issn = {{0024-3590}}, number = {{2}}, pages = {{541--553}}, publisher = {{Wiley}}, title = {{{Temperature and photoperiod effects on phytoplankton growing under simulated mixed layer light fluctuations}}}, doi = {{10.4319/lo.2012.57.2.0541}}, volume = {{57}}, year = {{2012}}, } @article{5035, author = {{Deister, U.K. and Büdicker, K. and Fettig, Joachim and Glinka, U. and Götz, M. and Hass, V.C. and Mennerich, A. and Rudolph, B. and Scheffold, K. and Wolfertz, R.}}, journal = {{Die Neue Hochschule }}, number = {{1}}, pages = {{6--12}}, title = {{{Forschendes Lernen und Lehren in der Umwelttechnik}}}, year = {{2012}}, } @inproceedings{3106, author = {{Pick, V. and Fettig, Joachim and Austermann-Haun, Ute and Fabritius, B. and Stein, A. and Blumberg, M. and van Phunoc, N.}}, booktitle = {{IndustrieTage – Wassertechnik - Tagungsband}}, location = {{Frankfurt}}, pages = {{140 -- 147}}, title = {{{Eine neue Verfahrenskombination zur Reinigung von Stärkeabwasser in Vietnam}}}, year = {{2011}}, } @inbook{5031, author = {{Ramke, Hans-Günter and Blöhse, D. and Lehmann, Hans-Joachim and Fettig, Joachim}}, booktitle = {{Tagungsband, 22. Kasseler Abfall- und Bioenergieforum}}, location = {{Witzenhausen}}, pages = {{141--157}}, title = {{{Hydrothermale Carbonisierung organischer Siedlungsabfälle}}}, year = {{2010}}, } @inbook{5032, author = {{Wehnert, J. and Schulte-Ebbert, U. and Schlett, C. and Willme, U. and Zullei-Seibert, N. and Fettig, Joachim}}, booktitle = {{Tagungsband, Jahrestagung der Wasserchemischen Gesellschaft}}, location = {{Bayreuth}}, pages = {{258--262}}, title = {{{Orientierende Untersuchungen zum Rückhalt von EDTA, Carbamazepin und Amidotrizoesäure an verschiedenen Austauscher-/Adsorbermaterialien}}}, year = {{2010}}, } @article{5033, author = {{Fettig, Joachim}}, journal = {{Int. Rev. Appl. Sci. Eng.}}, number = {{1-2}}, pages = {{51--54}}, title = {{{Drinking Water Quality and Protection of Resources}}}, volume = {{1}}, year = {{2010}}, } @inproceedings{5034, author = {{Lorenz, M. and Le, T.T.H. and Pick, Volker and Meon, G. and Fettig, Joachim}}, location = {{Kiel}}, title = {{{Simulation of non-point pollution and reduction of water pollution in Tay Ninh catchment in Vietnam}}}, year = {{2010}}, } @inproceedings{4186, author = {{Ramke, Hans-Günter and Blöhse, Dennis and Lehmann, Hans-Joachim and Fettig, Joachim}}, booktitle = {{Sardinia 2009: Twelfth International Waste Management and Landfill Symposium}}, editor = {{Cossu, Raffaello and Diaz, Luis F. and Stegmann, Rainer}}, location = {{ S. Margherita di Pula (Cagliari), Sardinia, Italy}}, publisher = {{CISA Publisher}}, title = {{{Hydrothermal Carbonization of Organic Waste}}}, year = {{2009}}, } @misc{12252, abstract = {{Global climate change alters the relationship between temperature and light in aquatic ecosystems, which is expected to affect the success of different phytoplankton species. To examine this, the interactions between temperature, photoperiod and light exposure (LE) (integral daily light supply) on specific growth rates were analysed for Limnothrix redekei, Planktothrix agardhii (cyanobacteria), Nitzschia acicularis and Stephanodiscus minutulus (diatoms). A model of factor interactions was developed based on new (P. agardhii and St. minutulus) and previously published laboratory studies. It describes the measured data with high precision. Temperature and photoperiod affect the parameters of the light-growth response curve differently, but these effects are the same for all species. The link between functions for temperature and photoperiod is more species-specific. Using meteorological data, the model developed here was used to study the interplay of these factors during a spring bloom in Lake Müggelsee (Berlin). It was found that while all three factors influenced phytoplankton growth, temperature and photoperiod were more important than LE. Both the intensities of the factors and the interactions between them influenced each species to a different degree. The results may help improve our understanding and ability to predict shifts in phytoplankton communities caused by weather patterns and climate change.}}, author = {{Nicklisch, Andreas and Shatwell, Tom and Kohler, Jan}}, booktitle = {{Journal of Plankton Research}}, issn = {{1464-3774}}, number = {{1}}, pages = {{75--91}}, publisher = {{Oxford University Press (OUP)}}, title = {{{Analysis and modelling of the interactive effects of temperature and light on phytoplankton growth and relevance for the spring bloom}}}, doi = {{10.1093/plankt/fbm099}}, volume = {{30}}, year = {{2007}}, } @misc{3753, author = {{Austermann-Haun, Ute and Klaerding, Sebastian and Gniffke, Saskia and Fettig, Joachim and Pick, Volker}}, publisher = {{Ministerium für Umwelt und Naturschutz, Landwirtschaft und Verbraucherschutz des Landes Nordrhein-Westfalen}}, title = {{{„Konzeption der Bewirtschaftungsplanung – Teilbereich Punktquellen – zur Umsetzung der EG-Wasserrahmenrichtlinie am Beispiel des Flussgebiets der Werre“}}}, year = {{2007}}, } @inbook{4185, author = {{Fettig, Joachim and Miethe, Manfred and Pick, Volker}}, booktitle = {{Chemical Water and Wastewater Treatment IX}}, editor = {{Hahn, Hermann H. and Hoffmann, Erhard and Hallvard, Odegard}}, pages = {{103--113}}, publisher = {{IWA Publishing}}, title = {{{Decentralised Treatment of Runoff from Traffic Areas – Principles and Practical Aspects}}}, doi = {{10.2166/9781780402079}}, year = {{2007}}, } @misc{8181, author = {{Niederste-Hollenberg, Jutta and Oldenburg, Martin and Weilbeer, Jutta and Weissmann, Heike}}, booktitle = {{Hamburger Berichte zur Siedlungswasserwirtschaft TU}}, editor = {{Meinzinger, F. and Otterpohl, R.}}, location = {{Lübeck}}, pages = {{139--154}}, publisher = {{TU Hamburg-Harburg}}, title = {{{Die Vorklärung als Kohlenstoffsenke - ein Problem?}}}, year = {{2007}}, } @proceedings{10636, abstract = {{Any academic conference requires the efforts of many people, from conference committee members to reviewers to authors to attendees. I would like to thank some of the people who helped organize ACM Hypertext 2006 here. Uffe K. Wiil did an excellent job as General Chair, taking care of the lion's share of the budgeting, planning, and organizing, from the hotel selection to the day-to-day logistics. Jessica Rubart was an extremely able and effective co-Program Chair. Niels Olof Bouvin, the Technical Services Chair, worked hard to set up, customize and maintain our review system. Publicity Chair David Millard ensured that word of the conference reached many people.The reviewers this year did an excellent job. We received 41 full paper submissions, of which 12 were accepted. We also received 29 short paper submissions, of which 10 were accepted. As these acceptance rates indicate, we were unable to accept every paper we would have liked. We were particularly pleased to see a large number of papers that spoke to this year's theme of social networks and networking. This pays tribute to the breadth and flexibility of the community, something that many people note as one of the true strengths of this conference series.ACM Hypertext, as a conference series, is at a crossroads. When Uffe Wiil and I agreed to organize this year's event, we generated a quick preliminary call for papers with the headline "Quo Vadimus?" Looking at the submissions and accepted papers at this year (and, indeed the past several years) conference gives us some idea of how the Hypertext community has changed since the initial workshops of the late 1980's. Understanding this change can help us answer our question about where we are going. I hope we can use this event not only to further our understanding of the research aspects of our community, but also to plot a sustainable course for the future.}}, editor = {{Wiil, Uffe K. and Nürnberg, Peter J. and Rubart, Jessica}}, isbn = {{978-1-59593-417-8}}, location = {{Odense, Denmark}}, publisher = {{Association for Computing Machinery (ACM)}}, title = {{{Proceedings of the seventeenth conference on Hypertext and hypermedia (HT'06)}}}, doi = {{10.1145/1149941}}, year = {{2006}}, } @article{4184, author = {{Fassnacht, Axel and Fettig, Joachim and Lendt, Benno and Mundus, B.}}, issn = {{1436-6134}}, journal = {{DVGW energie | wasser-praxis}}, number = {{4}}, pages = {{38--42}}, publisher = {{Wirtschafts- und Verlagsgesellschaft Gas und Wasser}}, title = {{{Bachelor- und Masterstudiengänge an Fachhochschulen}}}, volume = {{56}}, year = {{2005}}, } @inbook{8107, author = {{Oldenburg, Martin}}, booktitle = {{Betriebs- und Regenwassernutzung - Bestandsaufnahme und Zukunftsvision}}, isbn = {{3-9804111-9-2}}, pages = {{107--118}}, title = {{{Möglichkeiten der Betriebs- und Regenwassernutzung im Rahmen von neuen Sanitärkonzepten}}}, year = {{2005}}, } @article{4175, abstract = {{{The environmental labour market in the Czech Republic, Germany, Italy, Sweden and the Netherlands was evaluated by analysing up to 120 job advertisements in each country. The conditions and requirements were grouped into 11 categories showing clear similarities and differences between the five countries. Further evaluation of the data gives evidence that the private sector plays a significant role for technical environmental professionals in Europe. As a central task, conclusions regarding degree and knowledge requirements, respectively, and the importance of a variety of skills are drawn. Suggestions are made how the findings can be accounted for in environmental curricula. Furthermore the role of networks for the graduates' entry into the labour market is emphazised.}}}, author = {{Fettig, Joachim}}, issn = {{0273-1223}}, journal = {{Water Science and Technology}}, keywords = {{Environmental curricula, knowledge requirements, labour market, professional skills}}, number = {{8}}, pages = {{109--116}}, publisher = {{IWA Publishing}}, title = {{{Some aspects of the environmental labour market in five European countries and conclusions with respect to environmental curricula}}}, doi = {{10.2166/wst.2004.0500}}, volume = {{49}}, year = {{2004}}, } @article{4176, abstract = {{Ingenieurstudium - Die neuen Abschlüsse Bachelor und Master werden in Deutschland auch in den Ingenieurwissenschaften die Diplomabschlüsse ablösen. Zu den Veränderungen in der Hochschulausbildung besteht in der Wirtschaft noch erheblicher Informationsbedarf. }}, author = {{Fettig, Joachim and Lendt, Benno and Merkl, Gerhard and Fassnacht, Axel}}, issn = {{0016-3651}}, journal = {{GWF Wasser, Abwasser}}, keywords = {{Ingenieurstudium, Bachelor-Abschluss, Master-Abschluss, Bologna-Erklärung}}, number = {{10}}, pages = {{696--699}}, publisher = {{Vulkan-Verlag GmbH}}, title = {{{Bachelor und Master in den Ingenieurstudiengängen}}}, volume = {{145}}, year = {{2004}}, } @article{4171, abstract = {{For 11 years, the Division of Applied Science, University of Paderborn, has offered a four‐year undergraduate technical environmental protection course. More than 500 graduates have completed the programme so far. By means of regular surveys, the job situations of the graduates are evaluated, and feedback about the strengths and weaknesses of the education is requested. In addition, the faculty members keep in close contact with potential employers by supervising students during their professional practical training and by joint projects. The results of this exchange of information and ideas with respect to the professional situation and perspective are described.}}, author = {{Fettig, Joachim and Henne, Karl-Heinz and Maßmeyer, Klaus}}, issn = {{1467-6370}}, journal = {{International Journal of Sustainability in Higher Education}}, number = {{1}}, pages = {{67--74}}, publisher = {{MCB UP Ltd }}, title = {{{A technical environmental protection curriculum in Germany: Intentions, acceptance and future improvements}}}, doi = {{10.1108/14676370210414182}}, volume = {{3}}, year = {{2002}}, } @article{5028, author = {{Fettig, Joachim and Pick, Volker and Miethe, Manfred and Strüber, K.}}, journal = {{KA Wasserwirtschaft, Abwasser, Abfall }}, number = {{3}}, pages = {{312--320}}, title = {{{Dezentrale Behandlung des Niederschlagsabflusses von Verkehrsflächen in einer mehrstufigen Schachtfilteranlage}}}, volume = {{49}}, year = {{2002}}, } @misc{3769, abstract = {{Mit polyhalogenierten aromatischen Kohlenwasserstoffen und flüchtigen anorganischen Stoffen kontaminierte Feststoffe werden unter Sauerstoffmangelbedingungen erhitzt und anschließend gekühlt. Die bei der Erhitzung entstehenden Brüden werden abgesaugt und mit einer kälteren Quenchflüssigkeit in Kontakt gebracht. Ein Teilstrom dieser Quenchflüssigkeit wird aus dem System ausgeschleust.}}, author = {{Dohmann, Joachim}}, title = {{{Verfahren zur Behandlung von kontaminierten Feststoffen }}}, year = {{2000}}, } @article{3770, abstract = {{Die Leistung der Feuerung von Müllverbrennungsanlagen ist abhängig vom verbrennenden Müllmassenstrom, vom Heizwert des eingesetzten Mülls und von der Luftzahl, mit der die Feuerung betrieben wird. Aufgrund der stark inhomogenen Zusammensetzung der eingesetzten Abfallbrennstoffe unterliegt dabei der Heizwert größeren Schwankungen, so dass auch die Feuerleistung bei gleichem Müllmassenstrom schwankt. Aus verschiedenen Gründen ist es sinnvoll, die aktuelle Feuerleistung zu ermitteln, etwa zur Regelung der Feuerung, zur Bewertung des Mülls hinsichtlich seines Heizwertes (zum Beispiel für Abrechnungszwecke) und zur Charakterisierung des Feuers (zum Beispiel zum Erkennen einer verzögerten Verbrennung und damit der Akkumulation von unverbranntem Müll). }}, author = {{Dohmann, Joachim and Starke, Cord}}, issn = {{1863-9763}}, journal = {{ Müll und Abfall }}, number = {{9}}, pages = {{528--531}}, publisher = {{Erich Schmidt Verlag}}, title = {{{Ermittlung der Feuerleistung von Müllverbrennungsanlagen }}}, doi = {{10.37307/j.1863-9763.2000.09.01}}, year = {{2000}}, } @misc{3773, author = {{Dohmann, Joachim and Mian, Iqbal Muhammad}}, title = {{{Reaktor zur Vergärung biogener Stoffe}}}, year = {{2000}}, } @article{3352, author = {{Müller, Ulrich and Dohmann, Joachim}}, journal = {{Lebensmitteltechnik}}, number = {{10}}, title = {{{Optimale Temperaturen fahren - Entwicklungen in der Kältetechnik}}}, volume = {{32}}, year = {{2000}}, } @misc{3734, author = {{Dohmann, Joachim and Keldenich, Kai and Mian , Iqbal Muhammad}}, title = {{{Aerosolminderung}}}, year = {{1999}}, } @article{3736, abstract = {{Grenzwerte für gasförmige Emissionen aus Müllverbrennungsanlagen sind in Deutschland durch die 17. BImSchV verbindlich festgelegt. In diesem Regelwerk wird die Beladung des Abgases mit organischem Kohlenstoff in der Absicht begrenzt, einen vollständigen chemischen Umsatz der brennbaren Rauchgasbestandteile in der Feuerung sicherzustellen. Ergänzend dazu wird für die im Spurenbereich auftretende Beladung des Abgases mit polychlorierten Dibenzo-p-dioxinen bzw. -furanen (PCDD/F) auf 0,1 ng TE/m3 (i. N. tr) begrenzt. Weitergehende Anforderungen, etwa in Bezug auf andere organische Stoffklassen, werden nicht definiert. Es bestehen keine Vorschriften, die die Beladungen von Rauchgasen mit anderen, möglicherweise toxischen organischen Verbindungen innerhalb der Rauchgasreinigungsanlagen begrenzen. Die Stoffgruppe der PCDD/F steht somit stellvertretend für weitere umweltrelevante organische Stoffe. An der modernen, nach dem Stand der Technik errichteten Rauchgasreinigungsanlage der Müllverbrennungsanlage Bielefeld wurde ein umfangreiches Untersuchungsprogramm mit dem Ziel durchgeführt, Stoffbilanzen für eine Vielzahl organischer Spurenstoffe aufzustellen. Diese Bilanzen erlauben detaillierte Rückschlüsse auf das Verhalten dieser Stoffe innerhalb der Rauchgasreinigungsanlage. }}, author = {{Dohmann, Joachim and Keldenich, Kai and Mian, Iqbal Muhammad and Böske, Jürgen}}, issn = {{ 1863-9763}}, journal = {{Müll und Abfall}}, number = {{9}}, pages = {{556--562}}, publisher = {{Erich Schmidt Verlag}}, title = {{{Organische Spurenstoffe in Müllverbrennungsanlagen }}}, doi = {{10.37307/j.1863-9763.1999.09.04}}, year = {{1999}}, } @misc{3771, abstract = {{Zum Reinigen von Rauchgas, insbesondere aus Müllverbrennungsanlagen, wird dieses Rauchgas in einem Sprühtrockner gekühlt, anschließend entstaubt und in zwei hintereinander geschalteten Wäschern von Halogenwasserstoffen und Schwefeloxiden befreit. Die Waschflüssigkeit oder die Abflutungen der beiden Wäscher werden mit einem Neutralisationsmittel neutralisiert und dem Sprühtrockner zugeführt. Die Abflutung oder die Waschflüssigkeit des ersten Wäschers wird mit einem trockenen Neutralisationsmittel neutralisiert.}}, author = {{Dohmann, Joachim and Mian, Iqbal Muhammad}}, title = {{{Verfahren zum Reinigen von Rauchgas }}}, year = {{1999}}, } @article{3772, author = {{Dohmann, Joachim and Palitzsch, Sylke and Marzi, Thomas and Beckmann, Ralf and Kümmel, Rolf}}, issn = {{1863-9763}}, journal = {{Müll und Abfall}}, number = {{3}}, pages = {{129 -- 136}}, publisher = {{Erich Schmidt Verlag}}, title = {{{Künstliche Alterung - ein wirtschaftlicher Weg zur Verringerung der Schwermetallfreisetzung aus Müllverbrennungsaschen}}}, doi = {{10.37307/j.1863-9763.1999.03.02}}, volume = {{31}}, year = {{1999}}, } @misc{3733, author = {{Dohmann, Joachim and Keldenich, Kai}}, pages = {{3}}, title = {{{Absorber}}}, year = {{1998}}, } @article{3735, abstract = {{Using a basic model of the collision process, the major parameters which dominate the disintegration processes are discussed. The observed and described effect of secondary drop dispersion leads to an improvement of atomization and can be used to improve heat and mass transfer performance of technical equipment.}}, author = {{Dohmann, Joachim}}, journal = {{Chemical Engineering \& Technology}}, number = {{4}}, pages = {{341--345}}, title = {{{Dispersion and Coagulation of Droplets in Intersecting Sprays}}}, doi = {{10.1002/(SICI)1521-4125(199804)21:4<341::AID-CEAT341>3.0.CO;2-4}}, volume = {{21}}, year = {{1998}}, } @misc{8327, author = {{Dücker, Marita and Müller, Wolfgang and Rubart, Jessica}}, booktitle = {{Proceedings of Symposium on Visual Languages’98}}, isbn = {{0-8186-8712-6}}, issn = {{1049-2615}}, location = {{ Halifax, NS, Canada}}, publisher = {{IEEE}}, title = {{{ VIPspace – A Visually Programmable Shared Workspace}}}, doi = {{10.1109/VL.1998.706150}}, year = {{1998}}, } @inproceedings{6528, author = {{Prick, V. and Fettig, Joachim}}, booktitle = {{Abwässer der metallverarbeitenden Industrie - Tagungsband}}, location = {{Bremen}}, pages = {{B3 -- B20}}, title = {{{Rückgewinnung von Aluminium aus Abwasserteilströmen eines metallverarbeitenden Betriebes}}}, year = {{1996}}, } @inbook{6520, author = {{Fettig, Joachim and Ratnaweera, H. and Ødegaard, H.}}, booktitle = {{Chemical Water and Wastewater Treatment}}, editor = {{Hahn, H. H. and Klute, R.}}, pages = {{221 -- 242}}, publisher = {{Springer}}, title = {{{Simultaneous Phosphate Precipitation and Particle Destabilization Using Aluminium Coagulants of Different Basicity}}}, year = {{1990}}, } @article{6494, author = {{Sontheimer, H. and Cornel, P. and Fettig, Joachim and Rohmann, U.}}, journal = {{gwf - Wasser/Abwasser}}, number = {{11}}, pages = {{521 -- 530}}, title = {{{Grundwasserverunreinigungen - Bedrohung für die öffentliche Wasserversorgung?}}}, volume = {{123}}, year = {{1982}}, }