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以低温低浊期引滦原水为处理对象,在天津某净水厂采用预氯化和预臭氧两种预氧化方式进行生产性优化试验。结果表明,预氯化和预臭氧去除浊度和有机物的效果无明显差别,产生的消毒副产物都远低于国标限值;但预臭氧对控制THMs的生成作用明显好于预氯化,前者比后者滤后水的THMs生成量低91.7%,对应的出厂水低58.5%;预氯化处理成本远低于预臭氧,后者约为前者的3~5倍。综合分析比较,引滦原水低温低浊期优选预氯化处理方式,预臭氧作为应急备用,可实现保证水质、优化运行和节能降耗的目标。
Taking low-temperature and low-turbidity raw water from the Luanhe River as raw material, two pre-chlorination and pre-ozone pre-oxidation methods were used to optimize the production in a water purification plant in Tianjin. The results showed that the effects of pre-chlorination and pre-ozone to remove turbidity and organic matter had no significant difference, and the disinfection by-products produced were much lower than the national standard limits. However, the pre-ozone produced better control of THMs than the pre-chlorination, The latter produced 91.7% less THMs than the filtered water, corresponding to 58.5% lower ex-factory water. The cost of pre-chlorination was much lower than that of pre-ozone, which was about 3-5 times that of the former. According to comprehensive analysis and comparison, pre-chlorination treatment of low-temperature and low-turbidity raw water from Luanhe River is preferred. Pre-ozone can be used as an emergency backup to achieve the goal of ensuring water quality, optimizing operation and saving energy and reducing consumption.