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Improved model of secondary clarifier in A 2 /O process
Author(s) -
Longhua Ma,
Guodong Sun,
Yatong Qin
Publication year - 2009
Publication title -
asia‐pacific journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.348
H-Index - 35
eISSN - 1932-2143
pISSN - 1932-2135
DOI - 10.1002/apj.209
Subject(s) - clarifier , effluent , process (computing) , process engineering , environmental science , engineering , waste management , biochemical engineering , computer science , operating system
The complex behavior of the secondary clarifier and its great importance in the successful operation of the activated sludge process (ASP) have made the settling process a major issue for researchers working in the field of mathematical modeling. So, a precise model of the secondary clarifier can describe the actual behavior of a sewage plant better. But in ASM2, the solid/liquid separation in a secondary clarifier, which is highly nonlinear, is not considered. The solid/liquid separation affects not only the biological reaction but also the quality of the effluent. In this paper an improved secondary clarifier model based on a one‐dimensional settler model is established in terms of the solid flux concept and a mass balance. Through some given assumptions, a model of A 2 /O process including secondary clarifier is built, and then simulated. Copyright © 2009 Curtin University of Technology and John Wiley & Sons, Ltd.