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Effects of Operation Parameters on Critical Flux During Submerged-Type Membrane Filtration System  

Kim, Jun-Sung (한국과학기술연구원)
Ahn, Kyu-Hong (한국과학기술연구원)
Publication Information
Journal of Korean Society of Water and Wastewater / v.16, no.6, 2002 , pp. 717-725 More about this Journal
Abstract
A bench-scale submerged-type membrane filtration system (SMFS) was constructed to study a feasibility of membrane filtration for solid-liquid separation in water and wastewater treatment processes. In the case of applying the SMFS to a biological wastewater treatment process, so-called membrane bioreactor, aeration underneath membrane modules is usually employed in order to provide oxygen demand for microbial growth as well as to control membrane fouling. A study was investigated the effects of operation parameters by aeration intensity, feed concentration, foulant type and airlift pore size on critical flux. Critical flux tends to increase with aeration rate. Optimal aeration flow rate was found to be 10 L/min/module. Feed concentration and foulant type has a significant effect on membrane fouling and filtration performance. But downward position and pore size of airlift has no a significant effects on membrane fouling and filtration performance.
Keywords
submerged-type membrane filtration system; critical flux; fouling;
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