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Fouling and cleaning of microfiltration membrane in municipal wastewater reclamation

This paper presents an investigation on fouling and cleaning of a tubular microfiltration membrane for municipal wastewater reclamation. A bi-level complex model, namely channel clogging and pore plugging, was introduced to elucidate the fouling mechanism. Based on 135 days of microfiltration of act...

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Bibliographic Details
Published in:Water science and technology 2003, Vol.47 (1), p.263-270
Main Authors: XING, C.-H, WEN, X.-H, QIAN, Y, SUN, D, KLOSE, P. S, ZHANG, X. Q
Format: Article
Language:English
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Summary:This paper presents an investigation on fouling and cleaning of a tubular microfiltration membrane for municipal wastewater reclamation. A bi-level complex model, namely channel clogging and pore plugging, was introduced to elucidate the fouling mechanism. Based on 135 days of microfiltration of activated sludge, a preventive method for channel clogging was reasonably proposed and proven to be effective. Without channel clogging, the operation period was observed a five-fold increase on average, reaching 3-4 weeks. To remove pore plugging, a multi-step chemical cleaning was employed and further optimized in terms of temperature and alkaline concentration. Generally, the chemical cleaning could restore the membrane permeability to higher than 90%.
ISSN:0273-1223
1996-9732
DOI:10.2166/wst.2003.0065