海绵浸没式膜生物反应器与传统膜生物反应器中膜污染的对比研究。
A comparison study on membrane fouling in a sponge-submerged membrane bioreactor and a conventional membrane bioreactor.
机构信息
Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology, Sydney, Broadway, NSW 2007, Australia.
Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology, Sydney, Broadway, NSW 2007, Australia.
出版信息
Bioresour Technol. 2014 Aug;165:69-74. doi: 10.1016/j.biortech.2014.02.111. Epub 2014 Mar 6.
This study compared membrane fouling in a sponge-submerged membrane bioreactor (SSMBR) and a conventional membrane bioreactor (CMBR) based on sludge properties when treating synthetic domestic wastewater. In the CMBR, soluble microbial products (SMP) in activated sludge were a major contributor for initial membrane fouling and presented higher concentration in membrane cake layer. Afterwards, membrane fouling was mainly governed by bound extracellular polymeric substances (EPS) in activated sludge, containing lower proteins but significantly higher polysaccharides. Sponge addition could prevent cake formation on membrane surface and pore blocking inside membrane, thereby alleviating membrane fouling. The SSMBR exhibited not only less growth of the biomass and filamentous bacteria, but also lower cake layer and pore blocking resistance due to lower bound EPS concentrations in activated sludge. Less membrane fouling in SSMBR were also attributed to larger particle size, higher zeta potential and relative hydrophobicity of sludge flocs.
本研究比较了海绵浸没式膜生物反应器（SSMBR）和传统膜生物反应器（CMBR）在处理合成生活污水时基于污泥性质的膜污染情况。在 CMBR 中，活性污泥中的溶解性微生物产物（SMP）是初始膜污染的主要原因，并且在膜饼层中具有更高的浓度。之后，膜污染主要由活性污泥中的结合态胞外聚合物（EPS）控制，其蛋白质含量较低，但多糖含量显著较高。海绵的添加可以防止在膜表面形成饼层和膜内部堵塞，从而缓解膜污染。SSMBR 不仅表现出较低的生物量和丝状菌生长，而且由于活性污泥中结合态 EPS 浓度较低，其膜饼层和孔堵塞阻力也较低。SSMBR 中较少的膜污染还归因于污泥絮体较大的粒径、较高的zeta 电位和相对疏水性。
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