tetano
Editor, Senior Moderator
Sci Total Environ
. 2020 Jun 23;741:140445.
doi: 10.1016/j.scitotenv.2020.140445. Online ahead of print.
Potential Spreading Risks and Disinfection Challenges of Medical Wastewater by the Presence of Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) Viral RNA in Septic Tanks of Fangcang Hospital
Dayi Zhang[SUP] 1 [/SUP], Haibo Ling[SUP] 2 [/SUP], Xia Huang[SUP] 3 [/SUP], Jing Li[SUP] 4 [/SUP], Weiwei Li[SUP] 2 [/SUP], Chuan Yi[SUP] 2 [/SUP], Ting Zhang[SUP] 4 [/SUP], Yongzhong Jiang[SUP] 4 [/SUP], Yuning He[SUP] 5 [/SUP], Songqiang Deng[SUP] 5 [/SUP], Xian Zhang[SUP] 3 [/SUP], Xinzi Wang[SUP] 3 [/SUP], Yi Liu[SUP] 3 [/SUP], Guanghe Li[SUP] 3 [/SUP], Jiuhui Qu[SUP] 6 [/SUP]
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Abstract
The outbreak of coronavirus infectious disease-2019 (COVID-19) pneumonia raises the concerns of effective deactivation of the Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) in medical wastewater by disinfectants. In this study, we evaluated the presence of SARS-CoV-2 viral RNA in septic tanks of Wuchang Cabin Hospital and found a striking high level of (0.5-18.7) ? 10[SUP]3[/SUP] copies/L after disinfection with sodium hypochlorite. Embedded viruses in stool particles might be released in septic tanks, behaving as a secondary source of SARS-CoV-2 and potentially contributing to its spread through drainage pipelines. Current recommended disinfection strategy (free chlorine ≥0.5 mg/L after at least 30 min suggested by World Health Organization; free chlorine above 6.5 mg/L after 1.5-h contact by China Centers for Disease Control and Prevention) needs to be reevaluated to completely remove SARS-CoV-2 viral RNA in non-centralized disinfection system and effectively deactivate SARS-CoV-2. The effluents showed negative results for SARS-CoV-2 viral RNA when overdosed with sodium hypochlorite but had high a level of disinfection by-product residuals, possessing significant ecological risks.
Keywords: Cabin hospital; Disinfection; Disinfection by-products; Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2).
. 2020 Jun 23;741:140445.
doi: 10.1016/j.scitotenv.2020.140445. Online ahead of print.
Potential Spreading Risks and Disinfection Challenges of Medical Wastewater by the Presence of Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) Viral RNA in Septic Tanks of Fangcang Hospital
Dayi Zhang[SUP] 1 [/SUP], Haibo Ling[SUP] 2 [/SUP], Xia Huang[SUP] 3 [/SUP], Jing Li[SUP] 4 [/SUP], Weiwei Li[SUP] 2 [/SUP], Chuan Yi[SUP] 2 [/SUP], Ting Zhang[SUP] 4 [/SUP], Yongzhong Jiang[SUP] 4 [/SUP], Yuning He[SUP] 5 [/SUP], Songqiang Deng[SUP] 5 [/SUP], Xian Zhang[SUP] 3 [/SUP], Xinzi Wang[SUP] 3 [/SUP], Yi Liu[SUP] 3 [/SUP], Guanghe Li[SUP] 3 [/SUP], Jiuhui Qu[SUP] 6 [/SUP]
AffiliationsExpand
- PMID: 32599407
- DOI: 10.1016/j.scitotenv.2020.140445
Abstract
The outbreak of coronavirus infectious disease-2019 (COVID-19) pneumonia raises the concerns of effective deactivation of the Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) in medical wastewater by disinfectants. In this study, we evaluated the presence of SARS-CoV-2 viral RNA in septic tanks of Wuchang Cabin Hospital and found a striking high level of (0.5-18.7) ? 10[SUP]3[/SUP] copies/L after disinfection with sodium hypochlorite. Embedded viruses in stool particles might be released in septic tanks, behaving as a secondary source of SARS-CoV-2 and potentially contributing to its spread through drainage pipelines. Current recommended disinfection strategy (free chlorine ≥0.5 mg/L after at least 30 min suggested by World Health Organization; free chlorine above 6.5 mg/L after 1.5-h contact by China Centers for Disease Control and Prevention) needs to be reevaluated to completely remove SARS-CoV-2 viral RNA in non-centralized disinfection system and effectively deactivate SARS-CoV-2. The effluents showed negative results for SARS-CoV-2 viral RNA when overdosed with sodium hypochlorite but had high a level of disinfection by-product residuals, possessing significant ecological risks.
Keywords: Cabin hospital; Disinfection; Disinfection by-products; Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2).