Municipal Wastewater Treatment Using a UASB Coupled with Cross-Flow Membrane Filtration
Publication: Journal of Environmental Engineering
Volume 135, Issue 2
Abstract
A pilot scale up-flow anaerobic sludge blanket (UASB) coupled with cross-flow membrane filtration was used to treat low strength municipal wastewater in Singapore. The application of membrane filtration as a polishing unit of UASB effluent could produce better effluent quantity than conventional UASB. In this research, with gradually reducing hydraulic retention time from , membrane effluent was able to meet the more stringent effluent criterion over the whole experiment. Simultaneously, biogas yield increased from , in which methane percentages were also increased from 59.3 to 65.2%, respectively. Furthermore, the results of anaerobic membrane filtration showed that there were three different methods could effectively mitigate rapid membrane fouling and maintain trans-membrane pressure as low and stable as possible. These would reduce membrane cleaning frequency and prolong membrane life span.
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Acknowledgments
The writers would like to express heartfelt thanks to the Public Utilities Board of Singapore for providing grants for this research. The Ulu Pandan Wastewater Treatment and Reclamation plant is equally thanked for their assistance in providing the sludge and wastewater sample.
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Information & Authors
Information
Published In
Journal of Environmental Engineering
Volume 135 • Issue 2 • February 2009
Pages: 86 - 91
Copyright
© 2009 ASCE.
History
Received: Oct 13, 2006
Accepted: Sep 23, 2008
Published online: Feb 1, 2009
Published in print: Feb 2009
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