Saba Beenish, Hasan Shadi W, Kjellerup Birthe V, Christy Ann D
Department of Food, Agricultural and Biological Engineering, The Ohio State University, 590 Woody Hayes Drive, Columbus, OH 43210, USA.
Department of Environmental Sciences, PMAS Arid Agriculture University Rawalpindi, 46300, Rawalpindi, Pakistan.
Bioresour Technol Rep. 2021 Sep;15:100737. doi: 10.1016/j.biteb.2021.100737. Epub 2021 Jun 18.
Water is one of many viral transmission routes, and the presence of Severe Acute Respiratory Syndrome Corona Virus 2 (SARS-CoV-2) in wastewater has brought attention to its treatment. SARS CoV-2 primarily transmits in the air but the persistence of the virus in the water possibly can serve as a secondary source even though current studies do not show this. In this paper, an evaluation of the current literature with regards to the treatment of SARS-CoV-2 in wastewater treatment plant (WWTP) effluents and biosolids is presented. Treatment efficiencies of WWTPs are compared for viral load reduction on the basis of publicly available data. The results of this evaluation indicate that existing WWTPs are effectively removing 1-6 log viable SARS-CoV-2. However, sludge and biosolids provide an umbrella of protection from treatment and inactivation to the virus. Hence, sludge treatment factors like high temperature, pH changes, and predatory microorganisms can effectively inactivate SARS-CoV-2.
水是多种病毒传播途径之一，严重急性呼吸综合征冠状病毒2（SARS-CoV-2）在废水中的存在引发了人们对其处理的关注。SARS-CoV-2主要通过空气传播，但尽管目前的研究并未表明这一点，但病毒在水中的持久性可能会成为次要传播源。本文对当前有关污水处理厂（WWTP）废水和生物固体中SARS-CoV-2处理的文献进行了评估。根据公开数据比较了污水处理厂对病毒载量降低的处理效率。该评估结果表明，现有的污水处理厂能有效去除1-6个对数级的活SARS-CoV-2。然而，污泥和生物固体为病毒提供了免受处理和灭活的保护。因此，诸如高温、pH值变化和捕食性微生物等污泥处理因素可有效灭活SARS-CoV-2。
