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研究了北京市第九水厂处理工艺过程中卤乙酸的去除特性，并测定了五个水厂配水管网中卤乙酸的变化情况。结果表明：①传统水处理工艺对卤乙酸的去除率仅在２０％以下；活性炭对卤乙酸的去除效果较好，不同运行时期的炭床对其进水中的卤乙酸去除率为５０％～８５％，去除的卤乙酸占预氯化后水厂进水中卤乙酸总量的４０％～７０％，其去除作用包括活性炭的吸附和炭床中的生物分解，两者所去除的卤乙酸量基本相同。②配水管网中影响卤乙酸变化的因素较多，如清水池停留时间较短，出水余氯较高，则可能在管网前部继续生成卤乙酸，使其浓度升高；在管网末梢，余氯较低，在微生物的作用下卤乙酸浓度将降低。
The removal characteristics of haloacetic acid in the process of Beijing No. 9 Water Plant were studied, and the changes of haloacetic acid in the water distribution network of the five water plants were determined. The results show that: 1 the removal rate of haloacetic acid in traditional water treatment process is only below 20%; the removal effect of activated carbon on haloacetic acid is better, and the removal rate of haloacetic acid in the feed water of carbon bed in different operation periods is 50%~ 85% of the removed haloacetic acid accounts for 40% to 70% of the total amount of haloacetic acid in the influent water of the plant after pre-chlorination. The removal includes the adsorption of activated carbon and the biodegradation in the carbon bed, and the haloacetic acid removed by the two. The amount is basically the same. 2 There are many factors affecting the change of haloacetic acid in the water distribution network. If the residence time of the clear water pond is short and the residual chlorine is higher, the haloacetic acid may continue to be generated in the front part of the pipe network to increase its concentration; With low residual chlorine, the concentration of haloacetic acid will be reduced under the action of microorganisms.