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针对常规工艺在给水处理中的局限性,为进一步优化出水水质,对比研究了预氯化与高锰酸钾预氧化对长江芜湖段水源水的强化混凝效果,分别考察了两种不同预氧化技术对去除浊度、CODMn、UV254、NH3-N、亚硝酸盐氮和三卤甲烷生成势(THMFP)的影响。结果表明:预氯化处理效果总体上优于高锰酸钾预氧化效果,但预氯化对于三卤甲烷生成势的控制以及助凝作用不及高锰酸钾预氧化。综合考虑除污效果及经济性,选取预氯化最佳工况为0.4 mg/L次氯酸钠预氧化60 min,高锰酸钾预氧化最佳工况为:高锰酸钾投量为0.4 mg/L、与混凝剂同时投加,并以预氯化为优选方案。
In order to further optimize the quality of effluent, aiming at the limitation of routine process in water treatment, the effect of pre-chlorination and pre-oxidation of potassium permanganate on the strengthening coagulation of the source water in the Wuhu section of Yangtze River was investigated. Two different pre-oxidation Effect of Technology on Removal of Turbidity, CODMn, UV254, NH3-N, Nitrite Nitrogen and Trihalomethane Formation Potential (THMFP). The results show that the pre-chlorination treatment is generally superior to the pre-oxidation of potassium permanganate. However, the pre-chlorination can not control the generation potential of trihalomethane and the coagulation-promoting effect is less than the pre-oxidation of potassium permanganate. Taking into account the decontamination effect and economy, the optimum condition of pre-chlorination was selected as 0.4 mg / L sodium hypochlorite pre-oxidation for 60 min. The optimal conditions for pre-oxidation of potassium permanganate were as follows: the dosage of potassium permanganate was 0.4 mg / L, and coagulant dosing at the same time, and the pre-chlorination for the preferred program.