二氧化氯和液氯联合消毒城市污水的研究

Tests of Combined Use of ClO_2 and Liquid Chlorine For Sterilization of Municipal Sewage

通过二氧化氯和液氯两种消毒剂联合用于城市污水的消毒试验,对两种消毒剂的投加配比、与污水接触时间以及ClO2和Cl2的残余量对存活的粪大肠菌群数的影响进行了探讨,结果表明:二氧化氯和液氯按2∶1的比例联合用于城市污水消毒时,效果良好,二氧化氯投加量3mg/L,液氯投加量1.5mg/L,经30min接触时间,大肠菌灭活率达99.9%。

Two antiseptics of chlorine dioxide and liquid chlorine were tested in a combined way for the sterilization of municipal sewage.The effects of the proportioning of the two antiseptics,the time of their being in contact with the sewage as well as the quantity of residual ClO2 and Cl2 on the number of the survival colibacillusoid groups were studied,the result of which showed:When ClO2 and liquid chlorine were used in a combined way at a ratio of 2 ∶1 in sterilizing municipal sewage,the result was good.When the quantity of ClO2 fed in was 3 mg/L and that of liquid chlorine was 1.5 mg/L,with the contact time being 30 min.,the dieing out rate of colibacillus reached 99.9%.