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Enhancement of Organic Matter Removal in an Integrated Biofilm-Membrane Bioreactor Treating High-Salinity Wastewater

机译：集成生物膜-膜生物反应器处理高盐度废水中有机物去除的增强

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High salinity can strongly inhibit microbial activity and decrease the sedimentation ability of activated sludge. The combination of biofilm and membrane bioreactor is a practical approach towards effective removal of pollutants and low fouling rate. An integrated biofilm-membrane bioreactor (BMBR) treating mustard tuber wastewater was investigated. An average COD removal efficiency of 94.81% and ammonium removal efficiency of 96.84% were achieved at an organic load of 0.5 kg COD/(m3·d). However, the reactor showed a relatively low efficiency in total nitrogen and soluble phosphorus removal due to the lack of anaerobic environment. The increase of influent organic load resulted in a performance degradation because a balance between the degradation ability and pollution has been reached. Images of scanning electron microscopy revealed that halophilic bacteria were the dominant microbe in the system that leads to a loose sludge structure and declined settling properties. It was found that membrane fouling was the consequence of the interaction of microbial activities and NaCl crystallization.
机译：高盐度会强烈抑制微生物活性并降低活性污泥的沉降能力。生物膜和膜生物反应器的结合是一种有效去除污染物和降低结垢率的实用方法。研究了一体化的生物膜-膜生物反应器（BMBR）处理芥菜块茎废水。有机负荷为0.5 kg COD /（m 3 ·d）时，平均COD去除率达到94.81％，铵盐去除率达到96.84％。然而，由于缺乏厌氧环境，反应器在总氮和可溶性磷的去除方面显示出相对较低的效率。由于已达到降解能力和污染之间的平衡，因此流入有机物负荷的增加导致性能下降。扫描电子显微镜的图像显示，嗜盐细菌是系统中的主要微生物，会导致污泥结构疏松和沉降性能下降。发现膜结垢是微生物活性和NaCl结晶相互作用的结果。

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