Assessment on activated sludge models for acetate biodegradation under aerobic conditions

Hoque, M. A. and Aravinthan, V. and Pradhan, N. M. (2009) Assessment on activated sludge models for acetate biodegradation under aerobic conditions. Water Science and Technology, 60 (4). pp. 983-994. ISSN 0273-1223

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Official URL: http://www.iwaponline.com/wst/06004/0983/060040983.pdf

Identification Number or DOI: doi: 10.2166/wst.2009.446

Abstract

A comparison of four different established models along with parameter estimation was carried out in order to explain the aerobic biodegradation of acetate in an activated sludge system. These models were investigated using experimental OUR data from batch experiments of three different concentration studies. Model calibration reveals that ASM1 model is not suitable to explain the observed experimental OUR during the famine phase implying storage compounds could play important role during that stage. Besides, the model corresponds to the accumulation concept is not well fitted for all concentrations studies though it includes the storage phenomena. Both the ASM3 model and the model for simultaneous storage and growth on substrate can well describe the acetate biodegradation process, however the OUR data alone is not sufficient to justify the suitability of those models. Simulated profiles using the model outputs demonstrate that storage is overestimated while ammonia degradation is underestimated in ASM3 compared to simultaneous growth and storage model. The current study also gives reasonable outcomes related to parameter estimation as compared with previous study which is statistically interpreted in this paper.

Item Type:	Article (Commonwealth Reporting Category C)
Additional Information:	Permanent restricted access to paper due to publisher copyright restrictions.
Uncontrolled Keywords:	activated sludge model; sludge storage; oxygen uptake rate (OUR); parameter estimation
Fields of Research (FOR2008):	09 Engineering > 0907 Environmental Engineering > 090702 Environmental Engineering Modelling 09 Engineering > 0904 Chemical Engineering > 090409 Wastewater Treatment Processes 09 Engineering > 0905 Civil Engineering > 090508 Water Quality Engineering
Subjects:	290000 Engineering and Technology > 291100 Environmental Engineering > 291101 Environmental Engineering Modelling
Socio-Economic Objective (SEO2008):	D Environment > 96 Environment > 9609 Land and Water Management > 960912 Urban and Industrial Water Management D Environment > 96 Environment > 9609 Land and Water Management > 960999 Land and Water Management of Environments not elsewhere classified
ID Code:	5936
Deposited By:	Dr Vasantha Aravinthan
Deposited On:	01 Nov 2009 23:51
Last Modified:	20 Dec 2011 13:12

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