次氯酸钠对污水处理厂二级出水消毒效果的影响因素探讨  

Investigation on Influencing Factors of Disinfection Effect of Sodium Hypochlorite on Secondary Effluent of Wastewater Treatment Plant

作　　者：何敏[1] 许小燕[1] 牛璐瑶 余沛芝 李玲玲 曹荥玉 董晓晨[1] 关永年 WIDO Schmidt 刘洪波[2] HE Min;XU Xiaoyan;NIU Luyao;YU Peizhi;LI Lingling;CAO Xingyu;DONG Xiaochen;GUAN Yongnian;WIDO Schmidt;LIU Hongbo(Suzhou Industrial Park Qingyuan&Hongkong China Water Co.,Ltd.,Suzhou 215021,China;School of Environment and Architecture,University of Shanghai for Science and Technology,Shanghai 200093,China;DVGW-Technologiezentrum Wasser,Wasserwerkstr,Dresden 2,D-01326,Germany)

机构地区：[1]苏州工业园区清源华衍水务有限公司,江苏苏州215021 [2]上海理工大学环境与建筑学院,上海200093 [3]德国水技术中心,德国德累斯顿2d01326

出　　处：《净水技术》2019年第1期7-11,共5页Water Purification Technology

基　　金：国家自然科学基金资助项目(21206092);水处理技术研究以及相关领域虚拟合作平台创建协议资助项目(201608);饮用水消毒副产物及嗅味控制技术研究(201608-1)

摘　　要：采用次氯酸钠对城市污水厂二级生物处理出水进行消毒试验,从氨氮浓度、pH、消毒时间、水温这4个方面,分析其对次氯酸钠消毒效果的影响。当氨氮浓度≤0.2 mg/L时,次氯酸钠最佳投加量为15 mg/L;氨氮浓度为0.2～0.4 mg/L时,次氯酸钠最佳投加量为8 mg/L;氨氮浓度约0.6 mg/L时,次氯酸钠最佳投加量为6 mg/L;氨氮浓度为0.8～1.2 mg/L时,次氯酸钠最佳投加量为5 mg/L。当pH值为5. 0～6.0时,10 mg/L的次氯酸钠投加量即可使出水达标,若pH值为8.0～9.0时,必须加大次氯酸钠的投加量至15 mg/L。冬季气温较低时,尾水消毒要考虑延长消毒接触时间。夏季水温较高,可以相应减少加氯量。一般消毒接触时间为15～30 min时消毒效果最佳。Sodium hypochlorite was used to disinfect secondary effluent of wastewater treatment plant.Factors affecting disinfection effect of sodium hypochlorite were analyzed from four aspects:ammonia nitrogen,pH,disinfection time and water temperature.When the concentration of ammonia nitrogen was less than 0.2 mg/L,the optimal dosage of sodium hypochlorite was 15 mg/L.When it was in range of 0.2~0.4 mg/L,the optimal dosage was 8 mg/L.When the concentration of ammonia nitrogen was about 0.6 mg/L,the best sodium hypochlorite dosage was of 6 mg/L.When the concentration of ammonia nitrogen was in range of 0.8~1.2 mg/L,the optimal dosage of sodium hypochlorite was 5 mg/L.When pH value was in the range of 5.0~6.0,with the dosage of 10 mg/L sodium hypochlorite,the effluent could reach the standard,and if pH value was in range of 8.0~9.0,the dosage of sodium hypochlorite must be increased to 15 mg/L.The temperature in winter was low,the disinfection contact time should be extended,and the higher temperature in summer could reduce chlorination.Generally,the best disinfection contact time was 15~30 min.

关 键 词：次氯酸钠 二级出水 氨氮 粪大肠菌群 

分 类 号：TU992.3[建筑科学—市政工程]