人工复合土层去除再生水中微量有机污染物的研究进展

A review of micro-organic-pollutants removal from the reclaimed water by artificial composite soil treatment system

再生水经深度处理后资源化回用是缓解水资源紧缺问题的有效途径之一。由于微量有机污染物的持久性与累积性,所以其在再生水及地下水中也有检出,且在极低浓度下能对人体健康及生态环境产生不利影响。人工复合土层利用物理、化学吸附、生物降解等作用实现污染物的去除,具有投资少、运行成本低、操作简单等优点,去除能力与污染物的迁移转化规律密切相关。目前对复合土层系统的研究主要包括渗滤介质、系统复氧方式、微生物特性、堵塞问题、运行方式,但主要集中在对常规污染物的去除,对水体中微量有毒有害污染物的研究缺乏。提高复合土层系统对再生水中微量有机污染物去除的稳定性及持久性,在实际工程应用中具有重要意义。

Wastewater reclamation and reuse is an efficient approach to solve water shortage problems in China.As the persistent and cumulative of micro-organic-pollutants,they were frequently detected in reclaimed water and even in groundwater.These micro-organic-pollutants could do harm to human health and the environment at very low concentrations.Artificial composite soil treatment system could remove pollutants from the wastewater through the physical,chemical,or biological interactions between the filter materials and the contaminants.It could effectively remove these micro-organic-pollutants with less investment,low operating costs and simple operation process.Current researches on artificial soil treatment system were about filter materials,the re-oxygenation way of the system,microbial properties,clogging and operation method which focused on the removal of some conventional pollutants,such as COD,TN,TP and so on,while the studies on the removal of some emerging organic pollutants were lacking.To get stable and better removal of micro-organic-pollutants on artificial composite soil treatment system is of significance for practical engineering application.