Innovative Treatment of Organic Contaminants in Reverse Osmosis Concentrate from Water Reuse: a Mini Review
Innovative Treatment of Organic Contaminants in Reverse Osmosis Concentrate from Water Reuse: a Mini Review
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DOI：
10.1007/s40726-019-00119-2
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发表时间：
2019-07
影响因子：
7.3
通讯作者：
Q. Xiang;Youhei Nomura;S. Fukahori;T. Mizuno;Hiroaki Tanaka;T. Fujiwara
中科院分区：
文献类型：
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作者：
Q. Xiang;Youhei Nomura;S. Fukahori;T. Mizuno;Hiroaki Tanaka;T. Fujiwara
中水回用中废水回收产生的反渗透浓缩液 (ROC) 保留了浓缩的有毒生物难降解有机物，开发去除这些有机物的技术至关重要。本文回顾了 ROC 中有机污染物的创新处理技术，并提出了应用的处理方案。为了充分管理 ROC，减少体积和提高质量非常重要。正向渗透 (FO) 可以减少 ROC 体积。高级氧化工艺（AOP）可降解有机污染物并产生可生物降解的有机物，但需要减少能源消耗。混凝是 AOP 预处理的有效选择，可以提高 ROC 的生物降解性。部分使用短时间AOP可以将高分子量有机物转化为相对可生物降解的有机物。在 AOP 中，旋转高级氧化接触器 (RAOC) 是一种利用太阳光照射从 ROC 中去除生物难降解有机物的节能技术。后生物处理可以显着节省能源并有效消除AOP产生的可生物降解有机物。微藻培养也是 ROC 资源回收的有效选择。考虑到这些技术，提出了一种包括 FO、预凝、短时间和/或太阳能驱动的 AOP（例如 RAOC）和后生物处理的集成工艺，作为 ROC 处理的节能且具有成本效益的技术。
Reverse osmosis concentrate (ROC) from wastewater reclamation in water reuse retains concentrated toxic bio-refractory organics, and developing technologies for their removal is essential. This paper reviews innovative treatment technologies for organic contaminants in the ROC, and treatment options for applications are proposed. To adequately manage ROC, volume reduction and quality improvement are important. Forward osmosis (FO) can reduce the ROC volume. Advanced oxidation processes (AOPs) result in degrading organic contaminants and producing biodegradable organics, but the reduction of energy consumption is required. Coagulation is an effective option as a pre-treatment of AOPs and can improve the biodegradability of ROC. Partial use of short-time AOPs can transform high molecular weight organics into relatively biodegradable organics. Among AOPs, a rotating advanced oxidation contactor (RAOC) can be an energy-saving technique for removing bio-refractory organics from ROC using solar light irradiation. Post-biological treatment can significantly save energy and efficiently eliminate biodegradable organics that are produced by AOPs. Microalgae cultivation is also an effective option for resource recovery from ROC. Considering the techniques, an integrated process comprising FO, pre-coagulation, short-time and/or solar-driven AOPs (e.g., RAOC), and post-biological treatment is proposed as an energy-saving and cost-effective technology for ROC treatment.