微量有机污染物、天然有机物和病原微生物的复合污染水源给饮用水安全带来了极大挑战，管网末端龙头水依然存在着消毒副产物(DBPs)、难降解痕量有机污染物、致病微生物以及抗药基因问题。本项目提出通过活性炭基质材料改性、过渡金属修饰等，调控优化生物活性炭工艺，提高去除微量有机污染物与天然有机物的效率，同时塑型输配管网中微生物群落结构，控制管网微生物胞外聚合物（EPS）的结构特征，抑制由EPS引发的持续DBPs生成，以及条件致病菌和抗药基因的传播，实现龙头水水质风险的控制。重点研究不同活性炭基质载体的生物活性炭水质净化效能，界面微生物与化学协同的污染物转化机制，优化生物活性炭载体材料，构建化学强化的生物活性炭处理系统，研究生物活性炭界面改性对管网微生物群落的塑型作用与调控机制，以及管网输配过程中DBPs与条件致病菌和抗药基因生成控制原理，为保障龙头水水质安全提供理论基础。

The combined pollution of trace organic pollutants, natural organic matter and pathogenic microorganisms in water source has brought great challenges to the safety of drinking water. There are still some problems including disinfection by-products (DBPs), refractory trace organic pollutants, pathogenic microorganisms and antibiotic resistance genes (ARGs) in tap water at the end of drinking water distribution systems (DWDSs). In this study, based on modification of activated carbon matrix materials or transition metal, by adjusting and optimizing biological activated carbon (BAC) treatment, and then, improving the efficiency of removing trace organic pollutants and natural organic matters, shaping the microbial community in DWDSs, controlling the structural characteristics of microbial extracellular polymeric substances (EPS), inhibiting the continuous DBPs formation and transmission of pathogenic microorganisms/ARGs induced by EPS, the control of tap water quality risk could be achieved. The purification efficiency of activated carbon from different substrates and the mechanism of pollutant transformation based on the cooperation of interface microorganism and chemistry will be studied emphatically. The project aims to optimize BAC carrier materials and build a chemically enhanced BAC treatment system. The shaping effect and regulation mechanism of interface modification of BAC on the microbial community in DWDSs, as well as the generation and control principle of DBPs, opportunistic pathogens and ARGs in DWDSs will be studied in depth, in order to supply the theoretical basis for the guarantee of the tap water quality security.