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城市污水处理工艺对宿主特异性标记物和肠道病原菌的去除效果

Keywords: 宿主特异性标记物,肠道病原菌,序批式活性污泥法,混凝,过滤

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Abstract:

采用自制小型反应器模拟实验和实时荧光定量PCR检测方法,针对指示人类、犬类粪便污染的宿主特异性标记物,以及病原性大肠埃希氏菌、沙门氏菌和志贺氏菌等典型的肠道病原菌,分别考察了序批式活性污泥法(SBR)、混凝、过滤工艺对它们的去除效果。研究结果表明,SBR工艺的去除效果优于混凝和过滤工艺,对标记物和病原菌毒力基因的去除率都在93.5%以上。SBR工艺中初期短时间的搅拌即可去除大部分标记物和病原菌。在这3种处理工艺中,宿主特异性标记物与肠道病原菌毒力基因的去除率具有显著相关性,这说明宿主特异性标记物能够在一定程度上反映污水处理过程中肠道病原菌的含量。

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