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2020 ; 741
(ä): 140445
Nephropedia Template TP
gab.com Text
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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
#MMPMID32599407
Zhang D
; Ling H
; Huang X
; Li J
; Li W
; Yi C
; Zhang T
; Jiang Y
; He Y
; Deng S
; Zhang X
; Wang X
; Liu Y
; Li G
; Qu J
Sci Total Environ
2020[Nov]; 741
(ä): 140445
PMID32599407
show ga
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(3) 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.