potential spreading risks and disinfection challenges of medical wastewater by the CORD-Papers-2022-06-02 (Version 1)

Title: 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
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 Fangcang Hospital and found their unexpected occurrence after disinfection with sodium hypochlorite. Embedded viruses in faeces particles might be released in septic tanks behaving as a source of SARS-CoV-2 and potentially contributing to its spread through drainage pipelines. Current recommended disinfection strategy (free chlorine above 6.5 mg/L after 1.5-hour contact) 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.
Published: 2020-04-30
DOI: 10.1101/2020.04.28.20083832
DOI_URL: http://doi.org/10.1101/2020.04.28.20083832
Author Name: Zhang D
Author link: https://covid19-data.nist.gov/pid/rest/local/author/zhang_d
Author Name: Ling H
Author link: https://covid19-data.nist.gov/pid/rest/local/author/ling_h
Author Name: Huang X
Author link: https://covid19-data.nist.gov/pid/rest/local/author/huang_x
Author Name: Li J
Author link: https://covid19-data.nist.gov/pid/rest/local/author/li_j
Author Name: Li W
Author link: https://covid19-data.nist.gov/pid/rest/local/author/li_w
Author Name: Yi C
Author link: https://covid19-data.nist.gov/pid/rest/local/author/yi_c
Author Name: Zhang T
Author link: https://covid19-data.nist.gov/pid/rest/local/author/zhang_t
Author Name: Jiang Y
Author link: https://covid19-data.nist.gov/pid/rest/local/author/jiang_y
Author Name: He Y
Author link: https://covid19-data.nist.gov/pid/rest/local/author/he_y
Author Name: Deng S
Author link: https://covid19-data.nist.gov/pid/rest/local/author/deng_s
Author Name: Zhang X
Author link: https://covid19-data.nist.gov/pid/rest/local/author/zhang_x
Author Name: Liu Y
Author link: https://covid19-data.nist.gov/pid/rest/local/author/liu_y
Author Name: Li G
Author link: https://covid19-data.nist.gov/pid/rest/local/author/li_g
Author Name: Qu J
Author link: https://covid19-data.nist.gov/pid/rest/local/author/qu_j
license: medrxiv
source_x: MedRxiv; WHO
source_x_url: https://www.who.int/
url: http://medrxiv.org/cgi/content/short/2020.04.28.20083832v1?rss=1 https://doi.org/10.1101/2020.04.28.20083832
has_full_text: FALSE
G_ID: potential_spreading_risks_and_disinfection_challenges_of_medical_wastewater_by_the