移动床膜生物反应器与传统膜生物反应器在膜污染方面的比较。
Comparison between a moving bed membrane bioreactor and a conventional membrane bioreactor on membrane fouling.
作者信息
Yang Shuai, Yang Fenglin, Fu Zhimin, Lei Ruibo
机构信息
Key Laboratory of Industrial Ecology and Environmental Engineering, MOE, School of Environmental and Biological Science and Technology, Dalian University of Technology, Dalian 116024, PR China.
出版信息
Bioresour Technol. 2009 Dec;100(24):6655-7. doi: 10.1016/j.biortech.2009.07.009. Epub 2009 Jul 28.
A membrane bioreactor filled with carriers instead of activated sludge named a moving bed membrane bioreactor (MBMBR) was investigated to minimize the effect of suspended solids on membrane fouling. The MBMBR and a conventional membrane bioreactor (CMBR) were operated in parallel for about two months. Unexpectedly, the rate of membrane fouling in MBMBR was about three times of that in CMBR. MBMBR showed a higher cake layer resistance than CMBR due to plenty of filamentous bacteria inhabited in suspended solids in MBMBR. Protein and polysaccharide contents of soluble EPS in MBMBR were obviously larger than those in CMBR. It could be speculated that the overgrowth of filamentous bacteria in MBMBR resulted in severe cake layer and induced a large quantity of EPS, which deteriorated the membrane fouling.
研究了一种填充载体而非活性污泥的膜生物反应器，即移动床膜生物反应器（MBMBR），以尽量减少悬浮固体对膜污染的影响。MBMBR和传统膜生物反应器（CMBR）并行运行约两个月。出乎意料的是，MBMBR中的膜污染速率约为CMBR中的三倍。由于MBMBR中悬浮固体中存在大量丝状细菌，MBMBR表现出比CMBR更高的滤饼层阻力。MBMBR中可溶性胞外聚合物（EPS）的蛋白质和多糖含量明显高于CMBR。可以推测，MBMBR中丝状细菌的过度生长导致了严重的滤饼层，并诱导产生大量EPS，从而加剧了膜污染。
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