城市污水处理厂常见肠道病毒流行状况及污水回用对健康的危害

IF 2.3 Q3 ENVIRONMENTAL SCIENCES
Peng Liu, Zihan Li, Zifan Che, Hu Xinran, M. Ying, H. Ren, Xu-xiang Zhang
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引用次数: 1

摘要

众所周知,肠道病毒在城市废水中普遍存在,但关于废水再利用带来的健康风险的信息有限。这项研究量化了中国三家大型污水处理厂未经处理的废水中的六种常见肠道病毒,并确定了不同的二级和三级处理工艺在降低其丰度方面的有效性。在未处理的废水中,多瘤病毒BK和诺如病毒GII(Nov-GII)在检测到的DNA和RNA病毒中分别表现出最高的丰度,浓度>5 log10拷贝/L。原废水中的病毒主要通过二次处理过程去除,对数还原值在1至2之间。氯化和紫外线照射的三级处理工艺促进了病毒的进一步减少。应用定量微生物风险评估来评估腺病毒(Adv)和Nov-GII在将处理后的废水重新用于灌溉公共绿地和作物时的健康风险。两种重复使用的Adv和Nov GII的估计残疾调整寿命高于世界卫生组织在实际情况下要求的风险阈值(10−6)。应采用更有效的处理技术来去除病毒,以安全地重复使用处理过的废水。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Prevalence of common enteric viruses in municipal wastewater treatment plants and their health risks arising from wastewater reuse
Enteric viruses are known to be prevalent in municipal wastewater, but information on the health risks arising from wastewater reuse is limited. This study quantified six common enteric viruses in raw wastewater and determined the effectiveness of different secondary and tertiary treatment processes at reducing their abundances in three full-scale wastewater treatment plants in China. In the raw wastewater, polyomavirus BK and norovirus GII (Nov GII) exhibited the highest abundance among the detected DNA and RNA viruses, respectively, with concentrations >5 log10 copies/L. Viruses in the raw wastewater were mainly removed by the secondary treatment processes, with log reduction values ranging from 1 to 2. The tertiary treatment processes of both chlorination and ultraviolet irradiation facilitated the additional reduction of viruses. The quantitative microbial risk assessment was applied to estimate the health risks of adenovirus (Adv) and Nov GII when reusing the treated wastewater for irrigation of public green spaces and crops. Estimated disabled-adjusted life-years of Adv and Nov GII for both reuses were higher than the risk threshold (10−6) required by the WHO in the actual scenarios. More effective treatment technologies should be implemented to remove viruses for safe reuse of the treated wastewater.
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来源期刊
Blue-Green Systems
Blue-Green Systems Multiple-
CiteScore
8.70
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