给水管网管壁生物膜脱落的影响因素研究现状

Research Progress on the Influence Factors of Biofilm Detached in Drinking Water Distribution System

城市给水管网系统是将饮用水从处理厂输送到用户端的关键基础设施,但饮用水在输送过程中会出现水质下降的问题,而管壁生物膜的脱落是影响水质的重要原因之一。总结了生物膜的形成和脱落过程,生物膜物理结构以及引起生物膜脱落进入管网水的影响因素。结果表明,消毒作用、营养物质的浓度、水力条件的变化都会导致生物膜脱落进入管网水,进而影响水质。因此,为保证给水系统中饮用水的安全必须关注管壁生物膜的脱落问题。

The drinking water distribution system is a critical infrastructure that transports drinking water from the water treatment plant to end-users.However,during the distribution process,there would be a problem of water quality degradation.The growth and detachment of biofilms on pipe walls were the important reasons which affecting water quality.This article presents a critical review of research on the growth and detachment process of biofilms,the structure of biofilms,and the reasons why they detach into the bulk water.The results indicate that disinfection,nutrient concentration,and changes in hydraulic conditions can cause the biofilm to detach into the bulk water,which affects water quality.Therefore,care must be taken with the detachment of biofilm to ensure the safety of drinking water in the drinking water distribution system.