不同净水工艺对含溴水体消毒副产物生成势的影响  

Influence of Different Water Purification Processes on Disinfection By-products Formation Potential of Bromide-containing Water

作　　者：毛玉琴 应海儿 杨宏伟 MAO Yu-qin;YING Hai-er;YANG Hong-wei(College of Biological and Environmental Engineering,Zhejiang Shuren University,Hangzhou 310015,China;Research Institute for Environmental InnovationTsinghua,Suzhou 215163,China)

机构地区：[1]浙江树人大学生物与环境工程学院,浙江杭州310015 [2]清华苏州环境创新研究院,江苏苏州215163

出　　处：《中国给水排水》2020年第5期1-6,共6页China Water & Wastewater

基　　金：浙江省自然科学基金资助项目(LQ20E080015);浙江省哲学社会科学规划课题(20NDJC20Z);浙江树人大学“青年博士创新计划”项目(2019QC19)。

摘　　要：以溴离子和有机物浓度不同的5个水厂原水和各工艺段出水为研究对象,考察了不同净水工艺对三卤甲烷(THMs)和卤乙酸(HAAs)这两类典型消毒副产物生成势和种类分布的影响。结果表明,仅采用常规处理工艺对THMs和HAAs生成势的控制效果不明显,而增设生物预处理和臭氧氧化预处理工艺能显著提高常规工艺对THMs和HAAs前体物的去除效果,臭氧/生物活性炭(O3/BAC)深度处理工艺能进一步去除THMs和HAAs的前体物。增设预处理和O3/BAC深度处理工艺,并采取砂滤池后置的净水工艺流程对THMs和HAAs生成势的控制效果最好。对于含溴水体,溴离子浓度越高,有机物中亲水性组分所占比例越高,经氯消毒后生成的溴代THMs和HAAs所占比例就越高。随着处理工艺流程的进行,THMs和HAAs的生成势逐渐降低,但是它们的溴结合因子逐渐增大,即毒性更大的溴代组分所占比例逐渐增大。Raw water and effluent of each process unit in five waterworks with different concentrations of bromide and organics were collected.The effects of different water purification processes on formation potential and speciation distribution of two typical disinfection by-products,namely trihalomethanes(THMs)and haloacetic acids(HAAs),were investigated.The control effect of single conventional treatment on THMs and HAAs formation potential was not obvious.However,the biological pretreatment and ozonation pretreatment could significantly improve the removal efficiencies of THMs and HAAs precursors,and ozonation/biological activated carbon(BAC)advanced treatment process could further reduce the THMs and HAAs precursors.The water purification process adding pretreatment,ozonation/BAC advanced treatment and post sand filter had the best control effect on formation potential of THMs and HAAs.The higher the bromide concentration of the water,the higher the proportion of hydrophilic components in organics,and the higher the proportion of brominated THMs and HAAs generated after chlorination.The formation potential of THMs and HAAs decreased along the treatment process.However,the bromine incorporation factor gradually increased,indicating that the proportion of brominated DBPs with higher toxicity increased along the treatment process.

关 键 词：含溴水体 净水工艺 氯消毒 消毒副产物生成潜能 三卤甲烷 卤乙酸 溴结合因子 

分 类 号：TU991[建筑科学—市政工程]