供水管网中AOC、消毒副产物的变化规律

Study on Variability in AOC and Disinfection Byproduct in Water Distribution System

以西南L市的供水管网为研究对象 ,以可同化有机碳 (AOC)、三卤甲烷 (THMs)、卤乙酸 (HAAs)为评价指标 ,研究了不同季节给水管网中水质的变化情况。结果表明 :三卤甲烷在管网中只受余氯的影响 ,其含量一般随管道长度的增加而增加 ;卤乙酸和AOC在管网中的变化受余氯和微生物活性的影响 ,其含量一般随管网延伸而先增加后减少 ,温度越高则下降越快。温度和余氯是管网中控制消毒副产物和AOC浓度的重要因素。

Water quality variation with different seasons in water distribution system was investigated in L city, southwest of China. The assimilable organic carbon ( AOC ), trihalomethanes ( THMs ), and haloacetic acids ( HAAs ) were used as assessment indexes. The results show that THMs concentration is controlled by chlorine residual and is increased with the increase of pipe length. HAAs and AOC are varied based on the chlorine residual and microbial activity, and the concentration is increased firstly and then decreased with the extension of pipe net. The higher temperature results in more rapid reduction of concentration. Temperature and chlorine residual are the important factors that control the disinfection byproduct and AOC concentration.