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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 518-523A Model for Characterizing the Process of...

A Model for Characterizing the Process of Activated Sludge Compression Settling

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Abstract:

Based on batch settling tests, a model describing the compression settling stage was developed and validated by experimental data. A equation determining the critical point when the compression settling stage commences, and a new velocity function for compression settling process were deduced from the model. It was shown that compression settling velocity, time and sludge concentration of the critical point occurrence depend on the initial sludge concentrations, the initial sludge blanket height and the sludge characteristic. Dividing the entire settling process of activated sludge into the zone settling and compression settling stages, and describing them by respective velocity models was more reasonable for characterizing the entire settling behaviour of activated sludge. The method was applied to predict the sludge blanket height during batch settling tests, and the results showed that the settling processes could be simulated well.

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Advances in Environmental Science and Engineering

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Periodical:

Advanced Materials Research (Volumes 518-523)

Pages:

3680-3686

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.518-523.3680

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Online since:

May 2012

Authors:

Zhen Liang Li, Dai Jun Zhang

Keywords:

Activated Sludge, Batch Settling Test, Compression Settling, Critical Point of Settling

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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