Assessment on activated sludge models for acetate biodegradation under aerobic conditions

Article

Hoque, M. A., 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. https://doi.org/10.2166/wst.2009.446
Article Title

Assessment on activated sludge models for acetate biodegradation under aerobic conditions

ERA Journal ID4696
Article CategoryArticle
AuthorsHoque, M. A. (Author), Aravinthan, V. (Author) and Pradhan, N. M. (Author)
Journal TitleWater Science and Technology
Journal Citation60 (4), pp. 983-994
Number of Pages12
Year2009
PublisherIWA Publishing
Place of PublicationLondon, England
ISSN0273-1223
1996-9732
Digital Object Identifier (DOI)https://doi.org/10.2166/wst.2009.446
Web Address (URL)http://www.iwaponline.com/wst/06004/0983/060040983.pdf
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.

Keywordsactivated sludge model; sludge storage; oxygen uptake rate (OUR); parameter estimation
ANZSRC Field of Research 2020401199. Environmental engineering not elsewhere classified
400410. Wastewater treatment processes
400499. Chemical engineering not elsewhere classified
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Byline AffiliationsAustralian Centre for Sustainable Catchments
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