摘要
对比研究了4种预氧化剂在给水厂滤池反冲洗水(FBWW)回用条件下,对消毒副产物生成势(DBPFP)的影响。结果表明,尽管FBWW回用可有效提高浊度去除效率,但由于部分颗粒状有机物在预氧化阶段被氧化为更加难以去除的溶解态有机物,致使溶解态有机物去除率降低,从而影响后续消毒过程中消毒副产物(DBPs)生成量.在FBWW回用体积比10%条件下,使用NaCIO对原水进行预氧化处理可大幅削减三卤甲烷生成势(THMFP,28.5%),使用KMnO4可显著降低卤代硝基甲烷生成势(HNMFP,43.6%),使用ClO2可有效减少卤乙腈(HANs.38.3%)和三氯丙酮的生成量(9.7%),使用O3也可以减小卤乙腈生成势(HANFP,21.2%)。以氯胺作为消毒剂时的DBPFP较NaClO作为消毒剂时的DBPFP含量大幅降低。
The effect of four disinfectants on disinfection by-products formation potential (DBPFP) under the reuse of filter backwash water (FBWW) was comparative studied.The results showed that,although the FBWW could effectively improve the turbidity removal efficiency,some of the particulate organic matter was oxidized to dissolved organic matter in the pre-oxidation stage,resulting in a decrease in the organic matter removal rate.Thereby,the transformation affected the subsequent disinfection process and the production amount of DBPs.When FBWW reuse volume ratio was 10%,the preoxidation of raw water with NaClO could significantly reduce the formation potential of trihalomethanes (THMFP,28.5%),the use of KMnO4,ClO2,O3 could significantly reduce the formation potential of halonitromethanes (HNMFP,43.6%),haloacetonitriles (HANs,38.3%) and trichloroacetone (TCP,9.7%),(HANFP,21.2%),respectively.The DBPFP content of chloroammonia as the disinfectant was much lower than that of NaClO.
作者
蒙珂
李伟
刘玉灿
段晋明
MENG Ke;LI Wei;LIU Yucan;DUAN Jinming(Shaanxi Key Laboratory of Environmental,Engineering,Key Laboratory of Northwest Water Resources,Environment and Ecology,MOE,Xi'an University of Architecture and Technology,Xi'an 710055,China;POW ERCHINA Northwest Engineering Corporation Limited,Xi'an 710065,China;School of Civil Engineering,Yantai University,Yantai 264005,China)
出处
《水处理技术》
CAS
CSCD
北大核心
2020年第8期94-98,共5页
Technology of Water Treatment
基金
国家自然科学基金(51308437)
陕西省自然科学基金(2018JM5156)
山东省自然科学基金项目(ZR2017BEE016)
关键词
给水处理
预氧化
滤池反冲洗水
回用
消毒副产物生成势
drinking water treatment
pre-oxidation
filter backwash water
reuse
formation potential of disinfection by-products
