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Development of a mathematical model for "aerobic bulking"
Kappeler, J., & Gujer, W. (1994). Development of a mathematical model for "aerobic bulking". Water Research, 28(2), 303-310. https://doi.org/10.1016/0043-1354(94)90268-2
Influences of wastewater composition and operating conditions on activated sludge bulking and scum formation
Kappeler, J., & Gujer, W. (1994). Influences of wastewater composition and operating conditions on activated sludge bulking and scum formation. Water Science and Technology, 30(11), 181-189. https://doi.org/10.2166/wst.1994.0558
Verification and applications of a mathematical model for "aerobic bulking"
Kappeler, J., & Gujer, W. (1994). Verification and applications of a mathematical model for "aerobic bulking". Water Research, 28(2), 311-322. https://doi.org/10.1016/0043-1354(94)90269-0
Modelling the competition of filamentous and flocforming Bacteria in activated sludge plants
Gujer, W., & Kappeler, J. (1993). Modelling the competition of filamentous and flocforming Bacteria in activated sludge plants. In D. Jenkins, R. Ramadori, & L. Cingolani (Eds.), Prevention and Control of Bulking Activated Sludge (pp. 55-68). Perugia.
Influence of operating problems in wastewater treatment plants on the interactions between sewers, treatment plant and receiving water
Kappeler, J., & Gujer, W. (1993). Influence of operating problems in wastewater treatment plants on the interactions between sewers, treatment plant and receiving water. Water Science and Technology, 27(12), 199-203. https://doi.org/10.2166/wst.1993.0301
Populationsdynamik in Belebungsanlagen "aerober Blähschlamm"
Kappeler, J. (1993). Populationsdynamik in Belebungsanlagen "aerober Blähschlamm". Schriftenreihe Umwelt: Gewässerschutz, 183 (156 pp.).
Modelling population dynamics in activated sludge systems
Gujer, W., & Kappeler, J. (1992). Modelling population dynamics in activated sludge systems. Water Science and Technology, 25(6), 93-103. https://doi.org/10.2166/wst.1992.0116
Bulking in activated sludge systems: a qualitative simulation model for <I>Sphaerotilus natans</I>, Type 021N and Type 0961
Kappeler, J., & Gujer, W. (1992). Bulking in activated sludge systems: a qualitative simulation model for Sphaerotilus natans, Type 021N and Type 0961. Water Science and Technology, 26(3-4), 473-482. https://doi.org/10.2166/wst.1992.0427
Estimation of kinetic parameters of heterotrophic biomass under aerobic conditions and characterization of wastewater for activated sludge modeling
Kappeler, J., & Gujer, W. (1992). Estimation of kinetic parameters of heterotrophic biomass under aerobic conditions and characterization of wastewater for activated sludge modeling. Water Science and Technology, 25(6), 125-139. https://doi.org/10.2166/wst.1992.0118
Leben im Belebtschlamm - Eine Photodokumentation
Kappeler, J. (1992). Leben im Belebtschlamm - Eine Photodokumentation. Dübendorf, Schweiz: Eidg. Anstalt für Wasserversorgung, Abwasserreinigung und Gewässerschutz (Eawag).
Temperature effects on wastewater characterization and the release of soluble inert organic material
Sollfrank, U., Kappeler, J., & Gujer, W. (1992). Temperature effects on wastewater characterization and the release of soluble inert organic material. Water Science and Technology, 25(6), 33-41. https://doi.org/10.2166/wst.1992.0112
Calibration of an activated sludge model based on human expertise and on a mathematical optimization technique - a comparison
Wanner, O., Kappeler, J., & Gujer, W. (1992). Calibration of an activated sludge model based on human expertise and on a mathematical optimization technique - a comparison. Water Science and Technology, 25(6), 141-148. https://doi.org/10.2166/wst.1992.0119
Entstehung und Bekämpfung von Blähschlamm in Belebungsanlagen
Kappeler, J., & Gujer, W. (1990). Entstehung und Bekämpfung von Blähschlamm in Belebungsanlagen. Schriftenreihe Umweltschutz: Vol. 117. Bern: Bundesamt für Umwelt, Wald und Landschaft.