In Ontario, Canada, information is lacking on chlorine and ultraviolet (UV) light disinfection performance against enteric viruses in wastewater. We enumerated enteroviruses and noroviruses, coliphages, and Escherichia coli per USEPA methods 1615, 1602, and membrane filtration, respectively, in pre- and post-disinfection effluent at five wastewater treatment plants (WWTPs), with full-year monthly sampling, and calculated log10 reductions (LRs) while WWTPs complied with their monthly geometric mean limit of 200 E. coli/100 mL. Modeling of densities by left-censored estimation and Bayesian inference gave very similar results. Polymerase chain reaction (PCR)-detected enteroviruses and noroviruses were abundant in post-disinfection effluent (mean concentrations of 2.1 × 10+4-7.2 × 10+5 and 2.7 × 10+4-3.6 × 10+5 gene copies (GC)/L, respectively). Chlorine or UV disinfection produced modest LRs for culture- (0.3-0.9) and PCR-detected enteroviruses (0.3-1.3), as well as noroviruses GI + GII (0.5-0.8). Coliphages and E. coli were more susceptible, with LRs of 0.8-3.0 and 2.5, respectively. Sand-filtered effluent produced significantly higher enteric virus LRs (except cultured enteroviruses). Coliphage and human enteric virus densities gave significantly positive correlations using Kendall's Tau test. Enteric viruses are abundant in wastewater effluent following routine chlorine or UV disinfection processes that target E. coli. Coliphages appear to be good indicators for evaluating wastewater disinfection of enteric viruses.

中文翻译：

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用氯和紫外线消毒前后，市政废水中的肠病毒。

在加拿大安大略省，缺乏有关氯和紫外线（UV）消毒液对废水中肠病毒的消毒性能的信息。我们按照USEPA方法1615、1602和膜过滤分别对五个污水处理厂（WWTP）的消毒前后废水中的肠病毒和诺如病毒，大肠杆菌和大肠杆菌进行了计数，并按月进行了全年采样，并进行了计算污水处理厂的log10减少量（LRs）符合每月几何平均限值200大肠杆菌/ 100 mL。通过左删失估计和贝叶斯推断对密度进行建模的结果非常相似。聚合酶链反应（PCR）检测到的肠道病毒和诺如病毒在消毒后流出物中含量很高（平均浓度为2.1×10 + 4-7.2×10 + 5和2.7×10 + 4-3.6×10 + 5基因拷贝（GC） / L）。氯或紫外线消毒对培养物（0.3-0.9）和经PCR检测的肠病毒（0.3-1.3）以及诺如病毒GI + GII（0.5-0.8）产生适度的LR。鹅肝和大肠杆菌更易感，LR分别为0.8-3.0和2.5。沙滤出水产生的肠道病毒LRs明显更高（培养的肠病毒除外）。使用肯德尔的Tau检验，鹅毛和人类肠道病毒的密度显着正相关。在针对大肠杆菌的常规氯气或紫外线消毒过程中，废水中富含肠道病毒。鹅肝似乎是评估肠病毒废水消毒的良好指标。大肠杆菌更易感，LR分别为0.8-3.0和2.5。沙滤出水产生的肠道病毒LRs明显更高（培养的肠病毒除外）。使用Kendall的Tau检验，鹅毛和人类肠道病毒的密度显着正相关。在针对大肠杆菌的常规氯气或紫外线消毒过程中，废水中富含肠道病毒。鹅肝似乎是评估肠病毒废水消毒的良好指标。大肠杆菌更易感，LR分别为0.8-3.0和2.5。沙滤出水产生的肠道病毒LRs明显更高（培养的肠病毒除外）。使用Kendall的Tau检验，鹅毛和人类肠道病毒的密度显着正相关。在针对大肠杆菌的常规氯气或紫外线消毒过程中，废水中富含肠道病毒。鹅肝似乎是评估肠病毒废水消毒的良好指标。在针对大肠杆菌的常规氯气或紫外线消毒过程中，废水中富含肠道病毒。鹅肝似乎是评估肠病毒废水消毒的良好指标。在针对大肠杆菌的常规氯气或紫外线消毒过程中，废水中富含肠道病毒。鹅肝似乎是评估肠病毒废水消毒的良好指标。