慢滤-低压纳滤协同控制典型病原微生物与再生水深度净化原理

条件致病菌、病毒等病原微生物是城市污水再生利用过程中高度关注的风险因子，有效控制病原微生物风险，是再生水深度净化与水质安全保障的重要内容和挑战。本项目拟针对再生水中典型病原微生物去除及其风险控制难题，重点围绕病原微生物与介质滤料、纳滤膜表面的微界面作用过程与机制，综合利用颗粒物界面表征、分子生物学解析等手段，研究病原微生物在滤料表面的相迁移、粘附富集、增殖或灭活等过程，阐明典型病原微生物胁迫下滤料表面微生物菌群结构及其演变规律；探索纳滤对典型病原微生物及其代谢产物去除性能，阐明纳滤去除病原微生物及其代谢产物的界面过程与膜污染机制；构建以典型病原微生物控制和微量污染物去除为目标、慢滤-低压纳滤协同的再生水深度净化工艺模式。本项目将为再生水病原微生物控制与水质安全综合保障提供基础性支撑。

The control of opportunistic pathogens, viruses, and other pathogenic microorganisms has received great concern and is a great challenge in the reclamation of wastewater. This project focuses on the interfacial interactions between pathogenic microorganisms and the surfaces of filter media and nano-filtration (NF) membrane, and aims to carefully investigate the processes of phase transfer, attachment and enrichment, propagation and inactivation of pathogenic microorganisms on filter media surfaces involved in. The different methods of interfacial characterization and molecular biological analysis are to be used to explore the characters and transformation of microorganisms community structure on the surfaces of filter media upon pathogenic microorganisms stress, and to illustrate the interfacial interactions between pathogenic microorganisms and NF and the removal efficiency of pathogenic microorganisms and their intermediate products. On the basis of these study, this project tends to propose the advanced treatment strategy of reclaimed water by the combined use of slow sand filtration and low-pressure NF, and potentially provides the scientific and fundamental support to control pathogenic microorganisms and related health risks for safe water reclamation.