使用原位生成的臭氧净化下水道。

IF 3.9 3区医学 Q1 INFECTIOUS DISEASES

Journal of Hospital Infection Pub Date : 2025-02-15 DOI:10.1016/j.jhin.2025.02.001

M.Z. Pajak-Zajac , A. Dowdell , H.E. Potts , A. Smith , D.A. Diver

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引用次数: 0

摘要

背景：水槽排水管可能是卫生保健环境中微生物污染的重要来源，由流动的水引起的病原体的雾化和溅回。目的：展示一种利用新一代工艺对排水渠进行臭氧消毒的方法，该工艺可抑制排水池中浮游或生物膜中的病原体生长。方法与结果：利用密封在排水疏水器与便携式冷等离子体装置之间的环境空气，在排水管道中原位产生高杀菌臭氧。装置内的安全装置确保操作人员不接触臭氧。随后的细菌恢复表明，排水管本身的生物膜的生物负荷减少了5log10，位于水槽的生物膜的生物负荷减少了6log10。结论：等离子体臭氧是一种安全有效的方法，用于控制定期湿润的管道和排水管中的生物负荷。研究的意义和影响：所描述的便携式臭氧消毒系统已经证明了控制病原体从排水管逸出的潜力。与传统的液体消毒技术相比，我们发现以下优点：(a)气体杀菌剂可以到达处理目标内的所有表面，不受取向或表面张力的限制；(b)臭氧可有效减少浮游生物及生物膜的细菌数目；(c)臭氧是在使用点由空气产生的，只需要最少的电力，不需要化学输送或储存，也不产生有毒残留物。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Drain decontamination using in-situ-generated ozone

Background

Sink drains can be a significant source of microbial contamination in healthcare settings due to aerosolization and splashback of pathogens caused by flowing water.

Aim

To demonstrate a method of ozone disinfection of drains using a novel generation process that suppresses pathogen growth in the drain sump, whether planktonic or dwelling in biofilms.

Methods and results

Highly biocidal ozone was generated in situ in the drain using the ambient air sealed between the water trap and a portable cold plasma device. Safety mechanisms in the device ensured that the operator was not exposed to ozone. Subsequent bacterial recovery illustrated an approximate bioburden reduction of 5 log₁₀ for biofilms in the drain itself, and 6 log₁₀ for biofilms located in the sink.

Conclusions

Plasma-generated ozone is a safe and effective method for controlling bioburden in periodically wetted, otherwise inaccessible pipework and drains.

Significance and impact of study

The portable ozone disinfection system described has demonstrated potential for controlling the escape of pathogens from drains. Compared with conventional liquid-based disinfection techniques, the portable ozone disinfection system has the following advantages: (i) a gaseous biocide can reach all surfaces inside the treatment target, without any restriction from orientation or surface tension; (b) ozone is effective in reducing planktonic and biofilm bacterial counts; and (c) ozone is generated at the point of use from air, using minimal electrical power, requiring no chemical delivery or storage, and producing no toxic residues.

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来源期刊

Journal of Hospital Infection 医学-传染病学

CiteScore

12.70

自引率

5.80%

发文量

271

审稿时长

19 days

期刊介绍： The Journal of Hospital Infection is the editorially independent scientific publication of the Healthcare Infection Society. The aim of the Journal is to publish high quality research and information relating to infection prevention and control that is relevant to an international audience. The Journal welcomes submissions that relate to all aspects of infection prevention and control in healthcare settings. This includes submissions that: provide new insight into the epidemiology, surveillance, or prevention and control of healthcare-associated infections and antimicrobial resistance in healthcare settings; provide new insight into cleaning, disinfection and decontamination; provide new insight into the design of healthcare premises; describe novel aspects of outbreaks of infection; throw light on techniques for effective antimicrobial stewardship; describe novel techniques (laboratory-based or point of care) for the detection of infection or antimicrobial resistance in the healthcare setting, particularly if these can be used to facilitate infection prevention and control; improve understanding of the motivations of safe healthcare behaviour, or describe techniques for achieving behavioural and cultural change; improve understanding of the use of IT systems in infection surveillance and prevention and control.