超滤与反渗透膜组合工艺处理污水厂二级出水时溶解有机物去除特性及膜污染研究。
Removal characteristics of dissolved organic matter and membrane fouling in ultrafiltration and reverse osmosis membrane combined processes treating the secondary effluent of wastewater treatment plant.
机构信息
Beijing Engineering Research Center of Sustainable Urban Sewage System Construction and Risk Control, Beijing University of Civil Engineering and Architecture, Beijing 100044, China and Key Laboratory of Urban Stormwater System and Water Environment, Ministry of Education, Beijing University of Civil Engineering and Architecture, Beijing 100044, China E-mail:
Innovation Academy for Green Manufacture, CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China.
出版信息
Water Sci Technol. 2021 Feb;83(3):689-700. doi: 10.2166/wst.2020.589.
The widespread implementation of municipal wastewater treatment and reuse must first ensure the safety of reused wastewater. The effluent of the municipal wastewater treatment plant contains a large amount of dissolved organic matter (DOM), which adversely affects the reuse of wastewater. In this study, the ultrafiltration (UF) + reverse osmosis (RO) process was used to treat the secondary effluent from wastewater treatment plants. The relationship between the removal performance, membrane fouling of the UF + RO process, and DOM removal characteristics of influent were studied. The results show that DOM can be removed effectively by UF + RO process. The UF mainly removes DOM with a molecular weight greater than 10 kDa, while RO has a significant removal effect on low-molecular-weight DOM, which mainly causes UF and RO membrane fouling. The UF + RO process has a significant removal rate on fulvic acid, humic acid, tyrosine, and tryptophan, and the order is humic acid > fulvic acid > tyrosine > tryptophan. Fulvic acid contributed the most to the UF membrane fouling, while fulvic acid and protein-like proteins contributed mainly to the RO membrane fouling.
城市污水再生利用的广泛实施，必须首先保证再生水的安全。城市污水处理厂的出水含有大量的溶解有机物（DOM），这对污水的再利用有不利影响。本研究采用超滤（UF）+反渗透（RO）工艺处理污水处理厂的二级出水，研究了 UF+RO 工艺的去除性能、膜污染与进水 DOM 去除特性之间的关系。结果表明，UF+RO 工艺能有效去除 DOM。UF 主要去除分子量大于 10 kDa 的 DOM，而 RO 对低分子量 DOM 有显著的去除效果，这主要导致 UF 和 RO 膜的污染。UF+RO 工艺对富里酸、腐殖酸、酪氨酸和色氨酸的去除率较高，顺序为腐殖酸>富里酸>酪氨酸>色氨酸。富里酸对 UF 膜污染的贡献最大，而腐殖酸和类蛋白主要对 RO 膜污染有贡献。
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