Study on Shock Disinfection in a Fire Extinguishing Water Supply System

The biofilms generated in a fire extinguishing water supply system can cause corrosion and a reduction in the water supply capacity; thus, degrading the system performance. To mitigate microbial corrosion, appropriate disinfection measures are necessary. In this study, the secondary addition of chlo...

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Autores principales:	Kun Xiang, Pan Geng, Xuan Sun, Shasha Yuan, Peng Du, Xing Li
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	fire extinguishing water supply system stainless steel pipeline microbial corrosion biofilm shock disinfection Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500
Acceso en línea:	https://doaj.org/article/f80a0d7404094f5ea364f7ad723c51f1
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spelling	oai:doaj.org-article:f80a0d7404094f5ea364f7ad723c51f12021-11-11T19:52:55ZStudy on Shock Disinfection in a Fire Extinguishing Water Supply System10.3390/w132129672073-4441https://doaj.org/article/f80a0d7404094f5ea364f7ad723c51f12021-10-01T00:00:00Zhttps://www.mdpi.com/2073-4441/13/21/2967https://doaj.org/toc/2073-4441The biofilms generated in a fire extinguishing water supply system can cause corrosion and a reduction in the water supply capacity; thus, degrading the system performance. To mitigate microbial corrosion, appropriate disinfection measures are necessary. In this study, the secondary addition of chlorine is employed to investigate the kinetics of chlorine decay, and shock disinfection is applied to investigate the removal efficiency of corrosion bacteria, and the microbial composition of a biofilm on the pipe wall was also clarified. The results show that the residual chlorine content in the secondary chlorination process was directly correlated with the decay rate of residual chlorine and the corrosion rate of the pipe wall. Additionally, the chlorine impact disinfection method could reduce the electrochemical corrosion phenomenon of the pipe wall. When the concentration of chlorine was 3 mg/L, the removal rate of corrosion bacteria was higher in 60 min than in 30 min. Specifically, most of the bacteria were inactivated in 60 min and the biofilm was severely damaged. Shock disinfection could significantly inactivate all microflora in the biofilm; the relative abundances of microflora varied significantly, while the change of microflora at the phylum level was insignificant. This study can provide theoretical support for the secondary addition of chlorine and shock disinfection in a fire extinguishing water supply system.Kun XiangPan GengXuan SunShasha YuanPeng DuXing LiMDPI AGarticlefire extinguishing water supply systemstainless steel pipelinemicrobial corrosionbiofilmshock disinfectionHydraulic engineeringTC1-978Water supply for domestic and industrial purposesTD201-500ENWater, Vol 13, Iss 2967, p 2967 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	fire extinguishing water supply system stainless steel pipeline microbial corrosion biofilm shock disinfection Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500
spellingShingle	fire extinguishing water supply system stainless steel pipeline microbial corrosion biofilm shock disinfection Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500 Kun Xiang Pan Geng Xuan Sun Shasha Yuan Peng Du Xing Li Study on Shock Disinfection in a Fire Extinguishing Water Supply System
description	The biofilms generated in a fire extinguishing water supply system can cause corrosion and a reduction in the water supply capacity; thus, degrading the system performance. To mitigate microbial corrosion, appropriate disinfection measures are necessary. In this study, the secondary addition of chlorine is employed to investigate the kinetics of chlorine decay, and shock disinfection is applied to investigate the removal efficiency of corrosion bacteria, and the microbial composition of a biofilm on the pipe wall was also clarified. The results show that the residual chlorine content in the secondary chlorination process was directly correlated with the decay rate of residual chlorine and the corrosion rate of the pipe wall. Additionally, the chlorine impact disinfection method could reduce the electrochemical corrosion phenomenon of the pipe wall. When the concentration of chlorine was 3 mg/L, the removal rate of corrosion bacteria was higher in 60 min than in 30 min. Specifically, most of the bacteria were inactivated in 60 min and the biofilm was severely damaged. Shock disinfection could significantly inactivate all microflora in the biofilm; the relative abundances of microflora varied significantly, while the change of microflora at the phylum level was insignificant. This study can provide theoretical support for the secondary addition of chlorine and shock disinfection in a fire extinguishing water supply system.
format	article
author	Kun Xiang Pan Geng Xuan Sun Shasha Yuan Peng Du Xing Li
author_facet	Kun Xiang Pan Geng Xuan Sun Shasha Yuan Peng Du Xing Li
author_sort	Kun Xiang
title	Study on Shock Disinfection in a Fire Extinguishing Water Supply System
title_short	Study on Shock Disinfection in a Fire Extinguishing Water Supply System
title_full	Study on Shock Disinfection in a Fire Extinguishing Water Supply System
title_fullStr	Study on Shock Disinfection in a Fire Extinguishing Water Supply System
title_full_unstemmed	Study on Shock Disinfection in a Fire Extinguishing Water Supply System
title_sort	study on shock disinfection in a fire extinguishing water supply system
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/f80a0d7404094f5ea364f7ad723c51f1
work_keys_str_mv	AT kunxiang studyonshockdisinfectioninafireextinguishingwatersupplysystem AT pangeng studyonshockdisinfectioninafireextinguishingwatersupplysystem AT xuansun studyonshockdisinfectioninafireextinguishingwatersupplysystem AT shashayuan studyonshockdisinfectioninafireextinguishingwatersupplysystem AT pengdu studyonshockdisinfectioninafireextinguishingwatersupplysystem AT xingli studyonshockdisinfectioninafireextinguishingwatersupplysystem
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Study on Shock Disinfection in a Fire Extinguishing Water Supply System

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