Substrate consumption and excess sludge reduction of activated sludge in the presence of uncouplers: A modeling approach

Xie, Wen-Ming, Ni, Bing-Jie, Sheng, Guo-Ping, Yu, Han-Qing and Yang, Min (2010) Substrate consumption and excess sludge reduction of activated sludge in the presence of uncouplers: A modeling approach. Applied Microbiology and Biotechnology, 85 6: 2001-2008. doi:10.1007/s00253-009-2255-6


Author Xie, Wen-Ming
Ni, Bing-Jie
Sheng, Guo-Ping
Yu, Han-Qing
Yang, Min
Title Substrate consumption and excess sludge reduction of activated sludge in the presence of uncouplers: A modeling approach
Journal name Applied Microbiology and Biotechnology   Check publisher's open access policy
ISSN 0175-7598
Publication date 2010-02
Sub-type Article (original research)
DOI 10.1007/s00253-009-2255-6
Volume 85
Issue 6
Start page 2001
End page 2008
Total pages 8
Place of publication Heidelberg, Germany
Publisher Springer
Language eng
Formatted abstract
A mathematical model with a consideration of energy spilling is developed to describe the activated sludge in the presence of different levels of metabolic uncouplers. The consumption of substrate and oxygen via energy spilling process is modeled with a Monod term, which is dependent on substrate and inhibitor. The sensitivity of the developed model is analyzed. Three parameters, maximum specific growth rate (μmax), energy spilling coefficient (qmax), and sludge yield coefficient (YH) are estimated with experimental data of different studies. The values of μmax, qmax, and YH are found to be 6.72 day-1, 5.52 day-1, and 0.60 mg COD mg-1 COD for 2, 4-dinitrophenol and 7.20 day-1, 1.58 day-1, and 0.62 mg COD mg-1 COD for 2, 4-dichlorophenol. Substrate degradation and sludge yield could be predicted with this model. The activated sludge process in the presence of uncouplers that is described more reasonably by the new model with a consideration of energy spilling. The effects of uncouplers on substrate consumption inhibition and excess sludge reduction in activated sludge are quantified with this model
Keyword Activated sludge
Energy spilling
Sludge yield
Substrate consumption
Uncoupler
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Advanced Water Management Centre Publications
 
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