城市污水处理厂尾水消毒应急提标改造研究
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摘要
在某城市污水处理厂一级A应急提标改造过程中,研究了不同尾水消毒方式的消毒效果,发现当水量高于6 500 m~3/h时,无法仅通过紫外线消毒使出水水质达到一级A排放标准。可以通过投加2. 0 mg/L的次氯酸钠,或采用紫外线与投加1. 0 mg/L的次氯酸钠组合方式使出水粪大肠菌群数稳定达到一级A排放标准。在该污水处理厂应急提标阶段,选择紫外线与次氯酸钠组合的消毒方式,既能够保证出水水质稳定达到一级A排放标准,又可以最大限度节省运行成本。
The effect of different tail wastewater disinfection methods was studied during emergency upgrading and reconstruction of a municipal wastewater treatment plant to meet the first class A discharge standard. It was found that the effluent quality could not meet the first class A discharge standard only by ultraviolet (UV) disinfection when the flow rate of the wastewater was above 6 500 m~3/h. However,the number of effluent fecal coliform could meet the first class A discharge standard by adding 2. 0 mg/L sodium hypochlorite,or adopting combined process of UV and 1. 0 mg/L sodium hypochlorite. The combined disinfection method of UV and sodium hypochlorite could not only ensure the effluent quality always conforming the first class A discharge standard,but also save the operation cost to the greatest extent during emergency upgrading and reconstruction of the plant.
The effect of different tail wastewater disinfection methods was studied during emergency upgrading and reconstruction of a municipal wastewater treatment plant to meet the first class A discharge standard. It was found that the effluent quality could not meet the first class A discharge standard only by ultraviolet (UV) disinfection when the flow rate of the wastewater was above 6 500 m~3/h. However,the number of effluent fecal coliform could meet the first class A discharge standard by adding 2. 0 mg/L sodium hypochlorite,or adopting combined process of UV and 1. 0 mg/L sodium hypochlorite. The combined disinfection method of UV and sodium hypochlorite could not only ensure the effluent quality always conforming the first class A discharge standard,but also save the operation cost to the greatest extent during emergency upgrading and reconstruction of the plant.
引文
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[2]柯强,李文红,陈英旭.紫外线杀菌效能的研究[J].环境污染与防治,2003,25(3):136-138,144.Ke Qiang,Li Wenhong,Chen Yingxu.Study on disinfection efficiency by ultraviolet[J].Environmental Pollution&Control,2003,25(3):136-138,144(in Chinese).
[3]王俊娇,吕鑑,张英,等.紫外线持续消毒能力的研究[J].工业用水与废水,2006,37(4):44-46.Wang Junjiao,LüJian,Zhang Ying,et al.Persistent disinfection ability of ultraviolet radiation[J].Industrial Water&Wastewater,2006,37(4):44-46(in Chinese).
[4]张惠华.污水处理厂利用次氯酸钠消毒实验研究[J].广东化工,2012,39(12):118-119.Zhang Huihua.Experiment study of sodium hypochlorite used to disinfection in sewage treatment plants[J].Guangdong Chemical Industry,2012,39(12):118-119(in Chinese).
[5]Platikanov S,Puig X.Chemometric modeling and prediction of trihalomethane formation in Barcelona’s water works plant[J].Water Res,2007,41(15):3394-3406.
[6]郭美婷,胡洪营.紫外线和氯组合方式对大肠杆菌灭活效果的影响研究[J].中国给水排水,2007,23(17):80-83.Guo Meiting,Hu Hongying.Influence of different combination modes of UV and chlorine on inactivation effect of Escherichia coli[J].China Water&Wastewater,2007,23(17):80-83(in Chinese).
[7]濮晨熹.城市污水处理厂消毒技术应用研究[D].广州:广州大学,2012.Pu Chenxi.Study on Application of Disinfection in Urban Sewage Treatment Plants[D].Guangzhou:Guangzhou University,2012(in Chinese).