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首页> 外文期刊>Journal of Environmental Engineering >Settling and Peracetic Acid for End-of-Pipe Treatment of sul1-Carrying Indicator Organisms and Impact on Receiving Water
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Settling and Peracetic Acid for End-of-Pipe Treatment of sul1-Carrying Indicator Organisms and Impact on Receiving Water

机译：沉降和过乙酸用于管道端部治疗SUL1携带指示器生物和对接收水的影响

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摘要

Combined sewer overflow (CSO) negatively impacts water quality during wet weather. An end-of-pipe treatment train with settleable particle removal and peracetic acid (PAA) disinfection was investigated for treatment of Escherichia coli (E. coli), sul1 gene-carrying E. coli, and total coliform (TC) in simulated CSO effluent. Settling reduced chemical oxygen demand by 49%+/- 11% and total suspended solids by 78%+/- 7%. Overall removals of 3.1 +/- 0.14-log and 2.5 +/- 0.37-log were achieved for E. coli and TC, respectively, with settling and disinfection, but these removals were not significantly different from removals with disinfection only. After disinfection, the fraction of E. coli carrying the antibiotic-resistance gene (ARG) sul1 increased. Treated samples were spiked into estuarine water to determine regrowth potential of target bacteria following release. After 7 days, E. coli was not detected in reactors with treated CSO, and TC concentrations decreased significantly. This research provides insight into a potential end-of-pipe treatment and suggests that disinfection rather than settling is more effective for microbial treatment of the wastewater component of CSO effluent.
机译：组合下水道溢出（CSO）对潮湿的天气产生负面影响。研究了具有可沉降的颗粒去除和过乙酸（PAA）消毒的管端部处理火车用于治疗大肠杆菌（大肠杆菌），携带的COLI（大肠杆菌），携带大肠杆菌和总大肠杆菌（TC），在模拟CSO流出物中。将化学氧需求降低49％+ / - 11％，总悬浮固体沉降78％+ / - 7％。对于大肠杆菌和TC，分别实现了3.1 +/- 0.14-log和2.5 +/- 0.37日志的总体去除，并且这些除去不会显着与消毒消毒的除去显着不同。消毒后，携带抗生素抗性基因（Arg）Sul1的大肠杆菌的分数增加。将处理的样品掺入偏卤素水中以确定释放后靶细菌的再生潜力。 7天后，在具有处理的CSO的反应器中未检测到大肠杆菌，TC浓度显着降低。本研究提供了对潜在的管道端部处理的洞察力，并表明消毒而不是沉降对于CSO流出物的废水组分的微生物处理更有效。

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