Laboratory Efficacy and Disinfection by-Product Formation of a Coagulant/Disinfectant Tablet for Point-of-Use Water Treatment
Laboratory Efficacy and Disinfection by-Product Formation of a Coagulant/Disinfectant Tablet for Point-of-Use Water Treatment
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DOI：
10.3390/w10111567
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发表时间：
2018-11
期刊：
影响因子：
3.4
通讯作者：
Félix Légaré-Julien;O. LeMay;Ulysse Vallée-Godbout;C. Bouchard;C. Dórea
中科院分区：
文献类型：
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作者：
Félix Légaré-Julien;O. LeMay;Ulysse Vallée-Godbout;C. Bouchard;C. Dórea
混凝剂/消毒产品（CDP）是一种使用点（POU）水处理技术，可以改善微生物质量，降低浊度，并产生游离余氯（FCR），在各种情况下，包括人道主义紧急情况，作为分散式水处理的潜在有效选择。一种新型的CDP与二氯异氰尿酸钠为基础的消毒剂进行了评价，其实验室水处理效果和消毒副产物（DBPs）的产生。CDP水处理性能相对于细菌学（E.大肠杆菌）人道主义水质目标、世界卫生组织关于评估POU水处理方案的建议以及现有的DBP法规和指南。至少4 log10 E.在测试条件下，实现了对于细菌减少的"高度保护"状态的大肠杆菌减少。处理过的沃茨中大肠杆菌的浓度始终低于10 MPN/100 mL。大肠杆菌浓度，大多数样品显示检测不到大肠杆菌。杆菌对于大多数条件，未达到目标FCR值。处理后的水浊度水平大多在5 NTU和10 NTU之间。DBP水平低于监管和健康为基础的目标，这两个家庭的DBP研究。本研究用于确定在具有挑战性的条件下测试的CDP的性能范围。
Coagulant/disinfection products (CDPs) are a point-of-use (POU) water treatment technique that can improve microbial quality, reduce turbidity, and produce a free chlorine residual (FCR), serving as a potentially effective option for decentralized water treatment in a variety of contexts, including humanitarian emergencies. A novel CDP with a sodium dichloroisocyanurate-based disinfectant was evaluated with regard to its laboratory water treatment efficacy and generation of disinfection byproducts (DBPs). The CDP water treatment performance was assessed relative to bacteriological (E. coli) humanitarian water quality objectives, World Health Organization recommendations for evaluating POU water treatment options, and available DBP regulations and guidelines. At least 4 log10 E. coli reductions, for a “highly protective” status with regard to bacterial reductions, were attained in the tested conditions. Treated waters were consistently below 10 MPN/100 mL with regard to E. coli concentrations, with the majority of samples showing no detectable E. coli. For most conditions, target FCR values were not attained. Treated water turbidity levels were mostly between 5 NTU and 10 NTU. DBP levels were below the regulatory and health-based targets for both families of DBPs studied. This study has served to identify the performance envelopes of the CDP tested under challenging conditions.