次氯酸钠、臭氧及其组合再生水消毒技术研究

发布时间：2018-03-18 05:10

本文选题：再生水　切入点：次氯酸钠　出处：《环境工程》2017年11期 　论文类型：期刊论文

【摘要】：以某城市污水处理厂二级出水为原水,采用次氯酸钠、臭氧以及臭氧/次氯酸钠组合工艺,研究了不同消毒方式对总大肠菌群、粪大肠菌群和色度的去除规律,消毒副产物中三卤甲烷(THMs)生成量随有效氯投加量变化的规律。试验结果表明:在次氯酸钠消毒过程中,有效氯投加量为5 mg/L时,总大肠菌群和粪大肠菌群去除率分别为99.91%和99.99%,色度去除率为26.00%;臭氧消毒过程中,当臭氧剂量为2.6 mg/L时,总大肠菌群和粪大肠菌群去除率分别为99.70%和99.73%,色度去除率为71.65%;在组合工艺中,当臭氧剂量为2 mg/L、有效氯投加量为0.5 mg/L时,出水总大肠菌群和粪大肠菌群总数去除率分别为99.94%和99.87%,色度去除率为70.60%;在相同有效氯投加量条件下,组合工艺较单独次氯酸钠消毒出水的总大肠菌群和粪大肠菌群更低,三氯甲烷生成量降低36.67%,一氯二溴甲烷未检出。
[Abstract]:The removal of total coliform bacteria, fecal coliform bacteria and chromaticity of total coliform bacteria, fecal coliform bacteria and chromaticity was studied by using the combined process of sodium hypochlorite, ozone and ozone / sodium hypochlorite with the secondary effluent of a municipal wastewater treatment plant as raw water. The variation of trihalomethane (THMs) production with the amount of available chlorine in disinfection by-products. The experimental results show that during the disinfection of sodium hypochlorite, the available chlorine dosage is 5 mg/L. The removal rates of total coliform group and fecal coliform group were 99.91% and 99.99, respectively. The removal rates of total coliform group and fecal coliform group were 99.70% and 99.73, respectively, and the chromaticity removal rate was 71.650.When the ozone dose was 2 mg / L and the effective chlorine dosage was 0.5 mg/L, The removal rates of total coliform group and fecal coliform group in effluent were 99.94% and 99.87, respectively, and the chroma removal rate was 70.600.Under the same effective chlorine dosage, the combined process was lower than the total coliform group and fecal coliform group in the disinfected effluent of sodium hypochlorite alone. The yield of trichloromethane was reduced by 36.67%, and methylene chloride dichlorobromate was not detected.
【作者单位】：北京工业大学北京市水质科学与水环境恢复工程重点实验室;北京城市排水集团有限责任公司科技研发中心;
【分类号】：X703

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