Q市给水系统中消毒副产物的变化研究

Variation of Disinfection By-products in Domestic Drinking Water in Q City

以Q市石头坪水厂的水源水、滤后水、出厂水和管网水为检测对象,考察了采用液氯消毒工艺时水中消毒副产物的组成、变化规律和影响因素,并提出了控制饮用水中消毒副产物的对策。结果表明,Q市自来水中消毒副产物含量均低于国标限值,其中三氯甲烷含量最多,浓度为11.11μg/L,是主要控制指标;消毒副产物主要产生于净水厂,且随输水管线的延长,其含量有增加的趋势;水中消毒副产物含量具有季节性变化规律;净水工艺对水中有机物的去除率可达到52%,通过提高有机物去除率和控制投氯量可有效减少消毒副产物的产生。

Source water, filtered Waterworks were investigated regarding water, clear water, and water in pipe network from Shitouping the composition and variation of disinfection by-products （DBPs） in the conventional treatment process. Additionally, strategies were proposed for controlling the DBPs. The results showed that, DBPs contents were below the limits in the national standard, and the major composition of DBPs was chloroform, whose concentration was 11.11μg/L. DBPs were produced mainly in the water treatment plants and the concentration increased with the extension of water-pipelines. A seasonal variation in DBPs was observed. The removal rate of organic matters reached 52% at the waterworks. Increasing the removal rate of organic matters and controlling the chlorine dosage could effectively reduce the production of disinfection by-products.