Can we decode the messages of activated sludge through the respirograms?

Hoque, Muhammad A. and Aravinthan, Vasantha and Pradhan, Nishant M. (2009) Can we decode the messages of activated sludge through the respirograms? Water, Air, and Soil Pollution: Focus, 9 (5/6). pp. 449-459. ISSN 1567-7230


Wastewater contains varieties of carbonaceous and nitrogenous compounds that undergo complicated biodegradation process in wastewater treatment plants. How these different compounds are degraded by activated sludge in aerobic conditions is still a mystery. Researchers have been trying to interpret it using the oxygen uptake rate (OUR) derived from the respirograms of respective substrates. Several models have been proposed to interpret the substrate removal mechanisms using the experimental observations. Have we succeeded in understanding the messages by activated sludge correctly using these models? In this paper, the distinctive nature of the respirograms when activated sludge is fed with different substrates and the biokinetic models that have been developed to explain the substrate removal mechanisms using derived OUR profiles are reviewed. In addition, a sensitivity study was conducted on the recently evolved simultaneous storage and growth model to investigate the influence of key parameters on OUR profiles during the biodegradation process.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Awaiting Author's version, which may be deposited in accordance with the copyright policy of the publisher.
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Agricultural, Civil and Environmental Engineering
Date Deposited: 22 Dec 2009 12:03
Last Modified: 02 Jul 2013 23:27
Uncontrolled Keywords: respirogram; oxygen uptake rate (OUR); substrate removal mechanisms; activated sludge models
Fields of Research : 09 Engineering > 0907 Environmental Engineering > 090702 Environmental Engineering Modelling
09 Engineering > 0904 Chemical Engineering > 090409 Wastewater Treatment Processes
03 Chemical Sciences > 0399 Other Chemical Sciences > 039903 Industrial Chemistry
Socio-Economic Objective: D Environment > 96 Environment > 9611 Physical and Chemical Conditions of Water > 961199 Physical and Chemical Conditions of Water not elsewhere classified
D Environment > 96 Environment > 9605 Ecosystem Assessment and Management > 960506 Ecosystem Assessment and Management of Fresh, Ground and Surface Water Environments
Identification Number or DOI: 10.1007/s11267-009-9238-6

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