摘要
淮河流域某水源水面临微量有机污染物种类增多、藻类季节性暴发而导致消毒副产物前体物增多的问题。试验在淮河流域某水厂建立的深度处理中试装置进行,重点探讨不同臭氧投加量条件下各处理单元对三卤甲烷前体物(THMFP)与卤乙酸前体物(HAAFP)的去除规律。结果表明,预臭氧-强化常规处理(生物强化滤柱)工艺主要去除三氯甲烷前体物(TCMFP),去除率为70.2%;臭氧-生物活性炭(O3-BAC)深度处理单元以去除二溴一氯甲烷前体物(CDBMFP)为主,去除率为56.8%。针对卤乙酸前体物(HAAFP),预臭氧-强化常规单元和O3-BAC深度处理单元都以去除二氯乙酸前体物(DCAAFP)为主,去除率分别为67.9%和45.5%。当预臭氧投加量为1.1 mg/L,主臭氧投加量为2 mg/L时,整个工艺对TTHMFP及THAAFP的去除率分别可达78.1%和52.4%,说明采用预氧化-强化常规处理-深度处理组合工艺可以有效去除水中的消毒副产物前体物,保障出厂水水质安全。
The water source in a certain area of the Huaihe River Basin faces many problems,such as increasing types of trace organic pollutants and seasonal algae outbreaks,which in turn led to an increase of disinfection by-product formation potential(DBPFP).Based on the pilot plant in a certain area of the Huaihe River Basin,this study focused on effects of ozone dosages on the removal efficiency of DBPFP in each treatment unit,mainly trihalomethanes formation potential(THMFP)and halogenated acid formation potential(HAAFP).The pre-ozone-enhanced conventional treatment(bio-enhancement filter unit)mainly removed the trichloromethane formation potential(TCMFP),with a removal rate of 70.2%;the ozone-bio-activated carbon treatment(03-BAC unit)removed the dibromochloromethane precursos(CDBMFP),and the removal rate was 56.8%.Meanwhile,the pre-ozone-enhanced conventional treatment and the 03-BAC unit mainly removed dichloroacetic acid formation potential(DCAAFP)with a rate of 67.9% and 45.5%,respectively.When the 03 dosages in the pre-ozone unit and 03-BAC unit were 1.1 mg/L and 2 mg/L respectively,with pre-ozonation+conventional water treatment+advanced treatment process,removal rates of TTHMFP and THAAFP were up to 78.1% and 52.4% respectively.The result indicates that the combination of pretreatment,enhanced-conventional treatment unit and advanced treatment could effectively reduce pollutants and ensure the safety of drinking water.
作者
杨阳
杨忠莲
吴倩
朱光灿
YANG Yang;YANG Zhonglian;WU Qian;ZHU Guangcan(School of Energy and Environment,Southeast University,Nanjing 210096,China)
出处
《净水技术》
CAS
2019年第8期53-63,共11页
Water Purification Technology
基金
国家科技重大专项(2014ZX07405002)
关键词
臭氧-生物活性炭
臭氧投加量
消毒副产物前体物
饮用水深度处理
ozone-biological activated carbon(O3-BAC)
ozone dosage
disinfection by-product formation potential(DBPFP)
advanced treatment of drinking water
