Separation of Activated Sludge with Sub-Mili Filtration

Yan Ping Cui; Bing Hua Yao

doi:10.4028/www.scientific.net/AMR.807-809.1523

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 807-809Separation of Activated Sludge with Sub-Mili...

Separation of Activated Sludge with Sub-Mili Filtration

Abstract:

Separation is one of the most important unit operations in biological wastewater treatment. Two commonly employed methods are gravity sedimentation (e.g. secondary clarifier) and membrane filtration (e.g. membrane bioreactor, MBR). Their efficiency at sludge concentrations higher than 10g/L as mixed liquor suspended solids (MLSS) would not meet actual engineering needs any longer. It is of interest to develop a cost-effective process which might pave ways for controlled redistribution of sludge concentration and eventually for reduced excess sludge. This work is to introduce a sub-mili filter as separation media to obtain a target effluent of suspended solids (SS) less than 500mg/L at flux higher than 100L/m²·h and sludge concentration about 20g/L as MLSS. Results show desired effluent SS can be achieved as low as 5mg/L, indicating sub-mili filtration could be an effective supplement to membrane separation and gravity sedimentation for specific applications.

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Periodical:

Advanced Materials Research (Volumes 807-809)

Pages:

1523-1526

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.807-809.1523

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Online since:

September 2013

Authors:

Yan Ping Cui, Bing Hua Yao

Keywords:

Activated Sludge, Separation, Sub-Mili Filter

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