生物活性炭工艺对二氯乙腈生成势去除机理  

Removal Mechanism of Dichloroacetonitrile Formation Potential by Biological Activated Carbon Process

作　　者：颜勇 谭怡雯 林涛[2] Yan Yong;Tan Yiwen;Lin Tao(Jiangsu Changjiang Water Co., Ltd. , Yangzhou 225009, China;College of Environment,Hohai University,Nanjing 210098,China)

机构地区：[1]江苏长江水务股份有限公司,江苏扬州225009 [2]河海大学环境学院,江苏南京210098

出　　处：《净水技术》2018年第12期52-58,共7页Water Purification Technology

基　　金：国家自然科学基金重点项目:含氮污染物在城市给水系统中转化过程与控制原理(51438006)

摘　　要：针对典型的含氮消毒副产物-二氯乙腈,选取以太湖为水源的水厂,结合有机物分子量分布,探究生物活性炭滤池对其生成势的去除效果。结果表明,A活性炭滤池对二氯乙腈生成势的平均去除率为35.85%,然而,使用时间更长的B活性炭滤池则为14.22%。对A和B两种活性炭滤池的出水差异进行分析,发现活性炭吸附作用和微生物代谢作用是其原因,其中微生物降解是主要因素,B活性炭滤池可产生更多的氨基酸、氨基糖、多糖和蛋白质,对有机物的代谢强度低于A活性炭滤池。因此,虽然生物活性炭池对二氯乙腈生成势去除效果较好,但仍需定期检测,及时更换。Dichloracetonitrile is a typical nitrogen containing DBP.Taking Taihu Lake as an example,removal rate of dichloracetoni-trile formation potential in biological activated carbon(BAC)filters was studied combined with molecular weight distribution of organic matter.Average removal rate of dichloroacetonitrile forming potential for a BAC filter was35.85%,while that of B BAC filter which operated a longer time was14.22%.After analyzing the effluent differences between two BAC filters,it was found that both activated carbon adsorption and microbial metabolism were the cause of dichloroacetonitrile degradation,and microbial degradation was the main factor.B BAC filter produced more amino acids,amino sugars,polysaccharides and proteins,and metabolic intensity of organic matters was lower than A BAC filter.Therefore,activated carbon in BAC filters need to be tested regularly and replaced timely,although BAC filter has a good removal effect on dichloroacetonitrile forming potential..

关 键 词：含氮消毒副产物 饮用水 二氯乙腈 前体物 生物活性炭 

分 类 号：TU991.2[建筑科学—市政工程]