Reduction of membrane fouling by simultaneous upward and downward air sparging in a pilot-scale submerged membrane bioreactor treating municipal wastewater

Title
Reduction of membrane fouling by simultaneous upward and downward air sparging in a pilot-scale submerged membrane bioreactor treating municipal wastewater
Authors
박희등이영행김현배문지희안창효김근태강문선
Keywords
Submerged membrane bioreactor; Membrane fouling; Dual header membrane module; Simultaneous upward and downward air sparging; KIMAS-20
Issue Date
2010-02
Publisher
Desalination
Citation
VOL 251, NO 1-3, 75-82
Abstract
A vertically oriented hollow fiber membrane module equipped with a downward aerator as well as an upward aerator for the simultaneous upward and downward air sparging was evaluated in a pilot-scale bioreactor. The operation was divided into three consecutive phases based on different membrane air sparging configurations: the simultaneous upward and downward air sparging (Phase 1), the single upward air sparging (Phase 2), and the simultaneous upward and downward air sparging (Phase 3). Although the SMBR operation, process performances including particulate matters, organic matters, and nutrients removals were stable, the membrane fouling characteristics were significantly different for the different air sparging configurations. The parameters such as the trans-membrane pressure increasing rate, the permeability decreasing rate, the irreversible membrane fouling rate, and the fouling resistance increased when the air sparging configuration was changed from the simultaneous upward and downward mode to the single upward mode (i.e., Phase 1 → Phase 2), while the parameters decreased when the air sparging configuration was switched from the single upward mode to the simultaneous upward and downward mode (i.e., Phase 2 → Phase 3). Taken together the results strongly support the effectiveness of the simultaneous upward and downward membrane air sparging in reducing membrane fouling.
URI
http://pubs.kist.re.kr/handle/201004/36204
ISSN
0011-9164
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KIST Publication > Article
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