Mathematical Modeling and Analysis of Wastewater Treatment Plant Using the Cannibal Process
Publication: Journal of Environmental Engineering
Volume 146, Issue 2
Abstract
The Combined Activated Sludge Anaerobic Digestion Model (CASADM) was configured to represent the operational results of a full-scale Cannibal wastewater treatment plant that operated over a 2-year period and had a net sludge yield that was low, approximately g volatile suspended solids/g chemical oxygen demand (g VSS/g COD) removed based on the model. CASADM accurately described available information on effluent quality and mixed-liquor volatile suspended solids (MLVSS) concentrations in each tank. Modeling results led to important insights into what led to the low net sludge yield of this Cannibal plant. For example, widespread net decay or slow growth [negative or very large positive values of solids retention times (SRTs)] of biomass caused total active biomass to be only 13%–21% of the MLVSS, and about 28% of the total input COD was converted to in the system. Input of active biomass and a low sludge-wasting rate proved to be key factors causing net decay or slow growth of active biomass, which, when combined with significant production, led to low net sludge yield.
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Data Availability Statement
All data, models, or code generated or used during the study are available from the corresponding author by request (including the CASADM model code and model results).
Acknowledgments
Jianglei Xiong was financially supported by the China Scholarship Council. Siemens Water Technology supported data collection and partially supported the development of CASADM.
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Published In
Journal of Environmental Engineering
Volume 146 • Issue 2 • February 2020
Copyright
©2019 American Society of Civil Engineers.
History
Received: Dec 20, 2018
Accepted: May 30, 2019
Published online: Dec 3, 2019
Published in print: Feb 1, 2020
Discussion open until: May 3, 2020
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