J
J. Kappeler
Researcher at Swiss Federal Institute of Aquatic Science and Technology
Publications - 4
Citations - 444
J. Kappeler is an academic researcher from Swiss Federal Institute of Aquatic Science and Technology. The author has contributed to research in topics: Activated sludge & Wastewater. The author has an hindex of 3, co-authored 3 publications receiving 435 citations.
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Journal ArticleDOI
Estimation of Kinetic Parameters of Heterotrophic Biomass under Aerobic Conditions and Characterization of Wastewater for Activated Sludge Modelling
J. Kappeler,Willi Gujer +1 more
TL;DR: Measurements showed that the maximum specific growth rate µ max of heterotrophic biomass depends on temperature, reactor configuration and SRT.
Journal ArticleDOI
Temperature effects on wastewater characterization and the release of soluble inert organic material
TL;DR: In this paper, it was shown that the amount of inert, non-biodegradable organic material increases with decreasing process temperature, and it was concluded that the inert material must originally be associated with a chemically reduced, slowly biodegradability, lipophilic fraction of the activated sludge, which contains little nitrogen.
Journal ArticleDOI
Bulking in Activated Sludge Systems: A Qualitative Simulation Model for Sphaerotilus natans, Type 021N and Type 0961
J. Kappeler,Willi Gujer +1 more
TL;DR: It is demonstrated that not only the well known facts such as reactor configuration, readily biodegradable substrate and temperature exert a strong influence on bulking behaviour, but also the influent slowly biodegrades substrate as well as inoculating biomass.