再生水紫外和氯单独与组合消毒试验研究
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摘要
采用紫外、氯单独与组合方式对再生水处理过程的超滤出水进行了消毒试验,研究了消毒对指示性微生物的去除效果,以及消毒副产物三卤甲烷(THMs)生成量随有效氯投加量的变化。结果表明:在紫外线剂量为25 m J/cm2、有效氯投加量为2 mg/L的最佳组合消毒工艺条件下,对细菌总数的去除率为99.94%,出水总大肠菌群数和粪大肠菌群数均小于3 CFU/L,消毒后总大肠菌群指标满足《城市污水再生利用城市杂用水水质》(GB/T 18920—2002)的要求。THMs的生成量随着有效氯投加量的增加而增加,在最佳组合消毒工艺下其生成量为15.19μg/L,比氯单独消毒(有效氯投加量为4 mg/L)时减少了55.36%。
Single and combination modes of UV and chlorine were used to disinfect the ultrafiltration( UF) effluent in treatment of reclaimed water. The inactivation of microorganisms and influence of different available chlorine dosage on formation of trihalomethanes( THMs) were studied. The results showed that the removal rate of total bacteria was 99. 94%,and the total coliform bacteria and the fecal coliform bacteria in the effluent were less than 3 CFU/L under the optimum conditions of UV/chlorine combined process that UV dose was 25 m J/cm2 and available chlorine dosage was 2 mg/L. The total coliform bacteria after disinfection met the requirement of the Reuse of Urban Recycling Water—Water Quality Standard for Urban Miscellaneous Water Consumption( GB/T 18920-2002). Concentrations of THMs increased with the raise of available chlorine dosage. Under the optimum conditions of UV/chlorine combined process,the formation of THMs was 15. 19 μg/L which was decreased by 55. 36% compared with single chlorine disinfection with available chlorine dosage of 4 mg/L.
Single and combination modes of UV and chlorine were used to disinfect the ultrafiltration( UF) effluent in treatment of reclaimed water. The inactivation of microorganisms and influence of different available chlorine dosage on formation of trihalomethanes( THMs) were studied. The results showed that the removal rate of total bacteria was 99. 94%,and the total coliform bacteria and the fecal coliform bacteria in the effluent were less than 3 CFU/L under the optimum conditions of UV/chlorine combined process that UV dose was 25 m J/cm2 and available chlorine dosage was 2 mg/L. The total coliform bacteria after disinfection met the requirement of the Reuse of Urban Recycling Water—Water Quality Standard for Urban Miscellaneous Water Consumption( GB/T 18920-2002). Concentrations of THMs increased with the raise of available chlorine dosage. Under the optimum conditions of UV/chlorine combined process,the formation of THMs was 15. 19 μg/L which was decreased by 55. 36% compared with single chlorine disinfection with available chlorine dosage of 4 mg/L.
引文
[1]张一清,张永吉,周玲玲.紫外线及联合工艺对水中微生物的灭活效果[J].中国给水排水,2013,29(16):20-23.
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[4]Parker J A,Darby J L.Particle-associated coliform in secondary effluents:Shielding from ultraviolet light disinfection[J].Water Environ Res,1995,67(7):1065-1075.
[5]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.
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[7]孙仲昊,徐斌,胡晨燕,等.氯胺消毒过程中碘代三卤甲烷生成的影响因素[J].中国给水排水,2013,29(5):1-4,9.
[8]肖洁雯,周达诚,王保强,等.饮用水中常见细菌对氯消毒副产物的影响[J].中国给水排水,2013,29(3):47-50.
[9]杜婧茹,李魁晓,周军,等.膜生物反应器处理城市污水的后续次氯酸钠消毒研究[J].环境科学,2011,32(8):2292-2297.
[2]宫飞蓬,李鑫玮,张静慧,等.再生水消毒工艺优化生产性试验研究[J].中国给水排水,2012,28(7):82-84.
[3]杨川,王晓羽,王丹,等.再生水紫外—氯组合消毒与单一氯消毒比较分析[J].供水技术,2011,5(1):19-22.
[4]Parker J A,Darby J L.Particle-associated coliform in secondary effluents:Shielding from ultraviolet light disinfection[J].Water Environ Res,1995,67(7):1065-1075.
[5]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.
[6]朱昱,陈卫国.“紫外线+氯”联合消毒技术用于十堰市第三水厂工程[J].中国给水排水,2013,29(18):56-59.
[7]孙仲昊,徐斌,胡晨燕,等.氯胺消毒过程中碘代三卤甲烷生成的影响因素[J].中国给水排水,2013,29(5):1-4,9.
[8]肖洁雯,周达诚,王保强,等.饮用水中常见细菌对氯消毒副产物的影响[J].中国给水排水,2013,29(3):47-50.
[9]杜婧茹,李魁晓,周军,等.膜生物反应器处理城市污水的后续次氯酸钠消毒研究[J].环境科学,2011,32(8):2292-2297.