Application of ozone combined with peracetic acid disinfection in centra-lized pure water supply system in hospitals
10.12138/j.issn.1671-9638.20245088
- VernacularTitle:臭氧协同过氧乙酸消毒在医院集中式纯水供应系统中的应用研究
- Author:
Xiong-Jing CAO
1
;
Yun-Zhou FAN
;
Fang GAO
;
Yan-Yan WU
;
Ming ZHU
;
Meng-Jie SHUANG
;
Li-Juan XIONG
Author Information
1. 华中科技大学同济医学院附属协和医院医院感染管理科,湖北武汉 430022
- Keywords:
ozone;
peracetic acid;
hospital;
centralized pure water supply system;
disinfection
- From:
Chinese Journal of Infection Control
2024;23(8):1012-1015
- CountryChina
- Language:Chinese
-
Abstract:
Objective To explore the disinfection effect of ozone combined with peracetic acid(PAA)on reducing the total number of aerobic bacteria in pure water from the terminal of centralized pure water supply system.Methods A two-stage controlled study was conducted,and microbial limit test was performed on the pure water from the ter-minal of centralized pure water supply system in a hospital.At the first stage,PAA disinfection method was adop-ted,and ozone enhanced disinfection(PAA combined with ozone disinfection)was adopted at the second stage.Dis-infection effects at different stages were compared.Results A total of 211 water specimens were collected for tes-ting,including 101 specimens from PAA disinfection group and 110 from ozone enhanced disinfection group.The bacterial colony qualification rate of terminal pure water from the ozone enhanced disinfection group was higher than PAA group(85.45％vs 74.26％,P=0.04).The median of aerobic bacterial colony number of the ozone enhanced disinfection group(2 CFU/mL)was significantly lower than that of the PAA disinfection group(20 CFU/mL).With time increase after disinfection,the number of aerobic bacteria colony in water specimens from the PAA disinfection group showed a significant upward trend(Day 1 vs Day 92:9 CFU/mL vs 1 062 CFU/mL),while the aerobic bac-teria fluctuation range in the pure water from the ozone enhanced disinfection group was relatively small(Day 1 vs Day 92:8 CFU/mL vs 58 CFU/mL).Conclusion The ozone combined with PAA disinfection method can signifi-cantly reduce the total number of aerobic bacteria in water from the terminal of centralized pure water supply sys-tem,with obvious maintaining effect.
