低温藻暴发不同应急工艺消毒副产物及嗅味的影响

Low-temperature Algae Outbreak Different Emergency Processes Effects of Disinfection by-products and Odor

为实现某水库冰封期低温高藻水嗅味去除,同时降低消毒副产物生成势,比较了高锰酸钾、过氧化氢、次氯酸钠和臭氧四种预氧化剂在单独预氧化和预氧化混凝两个过程的处理效果。研究表明,预氧化混凝过程优于单独预氧化处理;综合考量浊度、UV254、嗅味感官评价、三卤甲烷生成势和卤乙酸生成势五项指标,臭氧有更好的控制效果,最佳投加量为1.0 mg/L;过氧化氢最佳投加量为2.0 mg/L,高锰酸钾最佳投加量在0.5 mg/L,次氯酸钠最佳投加量在1.0 mg/L。

In order to remove the odor and the formation of disinfection by-products of the low temperature and high algae water of a reservoir during the icebound season, comparing four chemicals such as potassium permanganate, hydrogen peroxide, sodium hypochlorite and ozone in separate pre-oxidation and pre-oxidation colgulation. The results showed that pre-oxidation colgulation is better than a single pre-oxidation treatment. Under the consideration of the odor and the formation of disinfection by-products, it was the ozone that is the best pre-oxidant, and the appropriate dosage is 1.0 mg/L; hydrogen peroxide generated well in the control of disinfection by-products, but not well in odor removal, the appropriate dosage is 2.0 mg/L. The appropriate dosage of potassium permanganate is 0.5 mg/L and the best dosage of sodium hypochlorite is 1.0 mg/L.