Study of ozone misting for sanitization of hospital facilities: A CFD approach

IF 4.6 Q2 MATERIALS SCIENCE, BIOMATERIALS
Ionatan Anton Schroer, Janice da Silva, Bethânia Brochier, P. R. S. da Silva, Suse Botelho da Silva, Éverton Hansen
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引用次数: 2

Abstract

ABSTRACT The COVID-19 pandemic has demonstrated the demand for more effective procedures for sanitizing environments, especially high-risk ones, such as hospitals. Several products are used as disinfectants, with ozone being one of the strongest oxidants known. High relative humidity helps reduce the contact time required for viruses and bacteria inactivation with ozone. Thus, this work aimed to analyze the dispersion of an ozonized mist by CFD simulation to sanitize a hospital operating room. To our best knowledge, for the first time, the dispersion of an ozonized mist was investigated by CFD. The mathematical and numerical models were validated with results from the literature. The decay kinetics of the ozonized mist was obtained experimentally, resulting in a first order reaction with a kinetic constant of 2.66 × 10−4 s−1. The numerical results of concentration on the surfaces were analyzed qualitatively and quantitatively, providing relevant information about the fluid dynamics of the sanitizing process. Ozone mist concentrations were higher on the walls close to the generator and lower on the furthest walls and the ceiling. The ozone mist concentration in the room reached an average of 11 mg/L. Five minutes of ozone mist generation and another five minutes of decay by air circulation were sufficient to provide an increase in ozone mist to concentrations above 4 mg/L, considered satisfactory for the sanitization of the operating room surfaces.
用于医院设施卫生的臭氧雾化研究:CFD方法
2019冠状病毒病大流行表明,需要更有效的环境消毒程序,特别是医院等高风险环境。有几种产品被用作消毒剂,臭氧是已知最强的氧化剂之一。较高的相对湿度有助于减少病毒和细菌与臭氧灭活所需的接触时间。因此,本工作旨在通过CFD模拟分析臭氧雾的分散,以消毒医院手术室。据我们所知,这是第一次用CFD研究臭氧化雾的分散。数学和数值模型与文献结果进行了验证。实验得到了臭氧雾的衰变动力学,得到了一级反应,动力学常数为2.66 × 10−4 s−1。对表面浓度的数值结果进行了定性和定量分析,为消毒过程的流体动力学提供了相关信息。臭氧雾浓度在靠近发生器的墙壁上较高,而在最远的墙壁和天花板上较低。室内臭氧雾浓度平均达到11mg /L。5分钟的臭氧雾产生和另外5分钟的空气循环衰变足以使臭氧雾浓度增加到4mg /L以上,被认为是手术室表面消毒的满意条件。
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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来源期刊
ACS Applied Bio Materials
ACS Applied Bio Materials Chemistry-Chemistry (all)
CiteScore
9.40
自引率
2.10%
发文量
464
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