E3S Web of Conferences
Volume 44, 201810th Conference on Interdisciplinary Problems in Environmental Protection and Engineering EKO-DOK 2018
|Number of page(s)||8|
|Published online||03 July 2018|
Decay processes of AOB in ASM including protozoa grazing
Wroclaw University of Technology, Faculty of Environmental Engineering, Plac Grunwaldzki 9, 50-377 Wroclaw, Poland
2 Municipal Water and Sewage Company, Na Grobli 14/16 50-421 Wroclaw, Poland
* Corresponding author: email@example.com
Protozoa grazing of nitrifiers is important process in activated sludge process that leads to decrease of mass of active bacteria. In classical models this process is included in decay processes. Such approach makes modelling of influence of protozoa grazing on nitrifiers impossible. In cases when maximization of nitrifiers growth is important (such as nitrifiers cultivation for bioaugmentation) this simplification becomes major drawback. This paper presents extended version of ASM3 model that includes protozoa grazing as well as results of calibration of protozoa grazing process on experimental data. Additionally new approach for analysis of decay rate is proposed. This approach includes calculation of new parameters: substitute decay rate which is sum of ASM3 base decay rate and excluded predation process.
© The Authors, published by EDP Sciences, 2018
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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