某市常规水处理工艺对消毒副产物前体物的去除

Characteristics of Removing Disinfection By-Product Precursors by Conventional Processes

目的研究某市常规给水处理工艺对消毒副产物前体物的去除特性。方法2003年1—4月,采用气相色谱法测定T水厂原水、预氯化出水、沉淀出水、滤后水、出厂水中的三卤甲烷和卤乙酸前体物浓度。结果2003年3、4月原水三卤甲烷形成潜能(THMFP)分别为15.01和39.83μg/L,出厂水THMFP分别为13.85和13.42μg/L,原水卤乙酸形成潜能(HAAFP)为61.79～78.72μg/L,该工艺对原水HAAFP的平均去除率为44.13%。结论现有常规水处理工艺对THMFP和HAAFP均有一定去除作用。建议对不同地区、不同原水中的有机物进行分析,探求消毒副产物前体物的氯化反应活性和消毒副产物生成能力,从而为进一步控制消毒副产物的形成打下理论基础。

Objective Characteristics of removing disinfection by-product precursors by conventional processes were studied in a certain city that lives on surface water. Methods Gas chromatography was employed to determine trihalomethane and haloacetic acids in water. Sampling time was from January to April in 2003 and there were 5 sampling sites each time. Results Trihalomethane formation potential （THMFP） in the source water was 15.00-39.83 μg/L and in the supply drinking water it was 13.42-13.85μg/L. It showed that the conventional water treatment processes played a positive role in comrolling THMFP. Haloacetic acids formation potential（HAAFP） in source water changed from 61.79μg/L to 78.72μg/L and the average removing rate of HAAFP by conventional processes was 44.13%. Conclusion Further studies are needed about organic matters in different kinds of source water in different areas and reactivity of DBP precursors with chlorine and DBPs generating ability. All these studies will contribute to control DBPs in drinking water.