Composition characteristics and ultra-high standard treatment of reverse osmosis effluent produced during municipal wastewater reclamation process
HUANG Nan1,2, WANG Wen-Long3, WU Qian-Yuan3, WANG Qi1, WU Yin-Hu1,2, CHEN Zhuo1,2, XU Ao4, XIONG Jiang-Lei5, HU Hong-Ying1,2
1. Environmental Simulation and Pollution Control State Key Joint Laboratory, School of Environment, Tsinghua University, Beijing 100084, China; 2. Beijing Laboratory for Environmental Frontier Technologies, Beijing 100084, China; 3. Key Laboratory of Microorganism Application and Risk Control of Shenzhen, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China; 4. Research Institute for Environmental Innovation (Suzhou), Tsinghua, Suzhou 215163, China; 5. China Electronics System Engineering NO. 2 Construction Co., Ltd., Wuxi, 214135 China
Abstract：Because reverse osmosis (RO) can remove most pollutants from the feed water, RO technology has great application potential in treating municipal wastewater and producing reclaimed water for boilers, electronics industry and potable reuse. This study systematically summarized the concentration level, composition characteristics and sources of organic matter in municipal wastewater reclamation reverse osmosis (mWRRO) effluent. The usages of mWRRO effluent and corresponding risks were analyzed. The current ultra-high standard treatment technologies for mWRRO effluent and their developing trends were discussed. Compared with conventional water sources, the concentration of organic matter in the RO effluent produced during municipal wastewater reclamation process was higher (up to 500~1000μg-C/L). More than 100 organic contaminants have been identified in mWRRO effluent. Pharmaceuticals and personal care products, industrial compounds, endocrine disruptors, and oxidative by-products in RO effluent are frequently detected (10-3~2.5μg/L). Their long-term health risks deserve attention. The composition and characteristics of around 70% of the organic matter (calculated by organic carbon) in RO effluent have not been fully elucidated, which require systematic investigation. The radical synergistic oxidation and dual-wavelength ultraviolet (VUV/UV) technology are important developing trends of ultra-high standard treatment technology for RO effluent.
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