Survey on the quality and management status of medical institution wastewater disinfection in medical institutions in Nanjing from 2020 to 2024
- Author:
LU Moyuan
;
CHEN Kaige
;
WANG Chong
- Publication Type:Journal Article
- Keywords:
Medical institutions;
wastewater;
disinfection quality management;
environmental monitoring;
Nanjing
- From:
China Tropical Medicine
2025;25(2):192-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To analyze the changes in wastewater disinfection quality and influencing factors of medical institutions in Nanjing from 2020 to 2024, providing a reference for infection control departments in medical institutions regarding wastewater monitoring and management. Methods A total of 28 medical institutions in Nanjing were selected as the survey subjects. Microbial and total residual chlorine tests were conducted on hospital wastewater samples from 2020 to 2024 to compare the changes in the qualified rate of wastewater disinfection over the past five years. A current status investigation was also carried out on wastewater disinfection management, wastewater discharge, wastewater treatment equipment, and wastewater online monitoring systems in these hospitals. Results From 2020 to 2024, 140 samples of hospital wastewater were collected. Over the past five years, the disinfection quality of hospital wastewater showed a downward trend, with statistically significant differences (χ²trend=6.986, P<0.05). The qualified rate for microbial indicators was 82.14% (115/140), while the on-site qualified rate for the total residual chlorine test in 2024 was only 56.52%. Among the 28 surveyed medical institutions, 85.71% (24/28) outsourced disinfection work to third-party companies, while 14.29% (4/28) carried out disinfection by institutional staff, with no statistically significant difference (χ2=0.200, P>0.05) in the qualified rate of disinfection. Sodium hypochlorite was used to disinfect wastewater in 82.14%(23/28) of the institutions, while other disinfection methods included chlorine dioxide (7.14%, 2/28), potassium monopersulfate (7.14%, 2/28), and ozone (3.57%, 1/28). A statistically significant difference in disinfection qualification rates was observed between sodium hypochlorite and chlorine dioxide (χ2=6.802, P<0.05). Additionally, wastewater online monitoring systems had been installed in 25 institutions, but 16.00% (4/25) of them had yet to achieve full project monitoring coverage. Conclusion From 2020 to 2024, the quality of wastewater disinfection in medical institutions in Nanjing has declined, highlighting an urgent need to enhance wastewater monitoring. This would help reduce the impact of pathogenic microorganisms and other pollutants from hospital wastewater on the living environment.
- Full text:202511171021104159311.Survey on the quality and management status of medical institution wastewater disinfection in medical institutions in Nanjing from 2020 to 2024.pdf
