【摘要】 采用消毒剂二氧化氯(ClO2)进行二次供水水质消毒试验研究,考察了ClO2投加量、氨氮、CODMn和pH对ClO2的衰减及氯酸盐和亚氯酸盐消毒副产物生成的影响,并建立了氯酸盐(ClO3-)和亚氯酸盐(ClO2-)生成质量浓度的预测经验模型。结果表明,当原水CODMn<4.20 mg/L、氨氮的质量浓度<0.582 mg/L、pH在6.5～8.5、水中投加0.05mg/L的ClO2、HRT为48 h时,一定的液位降泵启动,消毒副产物在监测12 h内不超过GB 5749-2006的规定,并在水箱中基本检测不到微生物的存在。相同条件下,若ClO2投加量大于0.70 mg/L时,消毒副产物则可能超标。更多还原

【Abstract】 Chlorine dioxide(ClO2) was adopted as a disinfectant for a secondary water supply.Under experimental conditions,the effects of ClO2dosage,NH3-N and CODMnconcentrations,and pH on the attenuation of ClO2and the formation of chlorate(ClO3-) and chlorite(ClO2-) were investigated,and the predictive models for the produced ClO3-and ClO2-concentrations were developed.The results of the test showed that: when CODMn<4.20 mg/L,ammonia concentration <0.582 mg/L and pH was 6.5~8.5 in the raw water,dosing of ClO2was 0.05 mg/L,hydraulic retention time was 48 h,the starting of pumps in some certain liquid level drop,disinfection by-products did not exceed the provisions of GB 5749-2006 during monitoring 12 h and microorganisms were basically not monitored.Under the same condition,the disinfection by-products was maybe more than the standard level if the dosing of ClO2was over 0.7 mg/L.更多还原