Department of Environmental Engineering/Center of Excellence for Environmental and Hazardous Waste Management, Faculty of Engineering, Kasetsart University, Bangkok 10900, Thailand E-mail:
Water Sci Technol. 2013;68(5):1091-9. doi: 10.2166/wst.2013.350.
The removal of dissolved organic matter (DOM) during municipal solid waste leachate treatment in a membrane bioreactor (MBR) was investigated. The MBR was operated with fouled and cleaned membranes, at a time. DOM, mixed liquor, and effluent were characterized by fractionation and fluorescence excitation-emission matrix (EEM) spectroscopy. Results showed DOM removals of 82% during the MBR operation with the fouled membrane. The DOM characterization indicated that most of the hydrophilic compounds and protein-like substances could be significantly removed by microbial activities in the treatment processes. Furthermore partial removal or transformation of organic substances was observed during membrane filtration. The fouled membrane improved DOM rejection by only about 2% when compared to the cleaned membrane, which demonstrated the significance of irreversible foulants on DOM rejection. There were insignificant differences in DOM fractionation and EEM fluorescence spectra between water samples filtered through the fouled and cleaned membranes.
研究了膜生物反应器（MBR）中在处理城市固体废物渗滤液时对溶解有机物（DOM）的去除效果。该 MBR 同时使用污染和清洁的膜进行操作。通过分级和荧光激发-发射矩阵（EEM）光谱对 DOM、混合液和流出物进行了表征。结果表明，在用污染膜进行 MBR 操作期间，DOM 的去除率为 82%。DOM 的表征表明，在处理过程中，大多数亲水化合物和蛋白质样物质可以通过微生物的活性得到显著去除。此外，在膜过滤过程中观察到有机物质的部分去除或转化。与清洁膜相比，污染膜对 DOM 的去除率仅提高了约 2%，这表明不可逆污染物对 DOM 去除的重要性。通过污染和清洁膜过滤的水样在 DOM 分级和 EEM 荧光光谱方面没有显著差异。
