不同消毒工艺对韩江滤后水消毒效果的影响
- Title:
- Disinfection Efficiency of Filtered Water from Hanjiang River by Different Disinfection Processes
- Keywords:
- font-size: 10pt; ">filtered water from Hanjiang River; sodium hypochlorite; ozone; ultraviolet rays; combination disinfection; organic disinfection by- font-size: 10pt; ">products
- 摘要:
-
韩江是潮汕地区的饮用水源，其水质好坏直接关系到千家万户的用水安全。以汕头市某自来水厂滤后水为原水，采用次氯酸钠消毒（NaClO）、臭氧消毒（O3）、紫外消毒（UV）、次氯酸钠和紫外同时消毒（NaClO/UV）、臭氧和紫外同时消毒（O3/UV）、先臭氧后次氯酸钠消毒（O3+NaClO）6种消毒工艺，研究了不同消毒工艺的杀菌效果、UV254去除率和有机消毒副产物生成情况，并比选出最佳消毒工艺。结果表明：6种消毒工艺对水中细菌的灭杀效果均良好；O3+NaClO组合工艺对UV254的去除率最高，达到48.4%；6种消毒工艺出水的消毒副产物总量均符合我国《生活饮用水卫生标准》（GB 5749—2006）的要求，O3+NaClO组合工艺的有机消毒副产物生成风险最低。
- Abstract:
-
Hanjiang River is a drinking water source of Chaoshan area, and its water quality is directly related to the water safety of millions of households. The filtered water from a waterworks in Shantou was taken as the raw water. The germicidal efficacy, UV 254 removal efficiency and organic disinfection by-products formation during six disinfection processes sodium hypochlorite disinfection (NaClO), ozone disinfection (O3), ultraviolet disinfection (UV), simultaneous sodium hypochlorite and ultraviolet disinfection (NaClO/UV), simultaneous ozone and ultraviolet disinfection (O3/UV), and disinfection by ozone followed by sodium hypochlorite (O3+NaClO)］were investigated. Finally, the best disinfection process was explored, and the optimal disinfection process was selected. The six disinfection processes had good germicidal efficacy on bacteria in raw water. The removal efficiency of UV254 by the combined process of O3+NaClO was the highest, which reached 48.4%. The total amount of disinfection by-products produced by the six disinfection processes all met the requirements of Standards for Drinking Water Quality(GB 5749-2006), and the formation risk of organic disinfection by-products in effluent of O3+NaClO combined process was the lowest.
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