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。
Chlorine dioxide （Cl02） was adopted as a disinfectant for a secondary water supply. Under experimental conditions, the effects of CIO2 dosage, NH3-N and CODMn concentrations, and pH on the attenuation of ClO2 and 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 C102 was 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 ClO2 was over 0.7 mg/L.
出处
《水处理技术》
CAS
CSCD
北大核心
2012年第9期83-87,共5页
Technology of Water Treatment
基金
国家水体污染控制与治理重大专项资助(2009ZX07423-004)
关键词
二氧化氯
二次供水
氯酸盐
亚氯酸盐
消毒副产物
chlorine dioxide
secondary water supply
chlorate
chlorite
disinfection by-products
