Characterization of microbial regrowth potential shaped by advanced drinking water treatment

Microbial regrowth in premise plumbing is a threat to water safety. Disinfectant residuals are often diminished during water transportation and stagnation, leading to the regrowth of opportunistic pathogens. Although microbial regrowth potential is mostly determined by water treatment, little is kno...

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Autores principales:	Ikuro Kasuga, Hitomi Nakamura, Futoshi Kurisu, Hiroaki Furumai
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	advanced drinking water treatment annular reactor assimilable organic carbon microbial regrowth potential River, lake, and water-supply engineering (General) TC401-506 Water supply for domestic and industrial purposes TD201-500
Acceso en línea:	https://doaj.org/article/848772b86a6d4b95a25fd8761d207160
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spelling	oai:doaj.org-article:848772b86a6d4b95a25fd8761d2071602021-11-08T07:59:43ZCharacterization of microbial regrowth potential shaped by advanced drinking water treatment2616-651810.2166/h2oj.2021.103https://doaj.org/article/848772b86a6d4b95a25fd8761d2071602021-01-01T00:00:00Zhttp://doi.org/10.2166/h2oj.2021.103https://doaj.org/toc/2616-6518Microbial regrowth in premise plumbing is a threat to water safety. Disinfectant residuals are often diminished during water transportation and stagnation, leading to the regrowth of opportunistic pathogens. Although microbial regrowth potential is mostly determined by water treatment, little is known about how each treatment step affects two key factors that contribute to microbial regrowth potential: biodegradable organic matter and microbial abundance. In this study, we operated annular reactors to evaluate the microbial regrowth potential of water shaped after each treatment step in a full-scale drinking water treatment plant with ozonation and biological activated carbon filtration. The assimilable organic carbon and total cell count (TCC) were stable at all treatment steps during the sampling period from July to October 2015. The assimilable organic carbon consumption and TCC net increase in the annular reactors indicated that apparent growth yields (cell number base) of microbial communities were different in each reactor. Regrowth potential evaluated by indigenous microbial community in finished water was reduced to 22% of that in raw water, while 75% of assimilable organic carbon in raw water remained in finished water. It suggested that treatment performance evaluated by indigenous microbial communities was better than that evaluated by assimilable organic carbon. HIGHLIGHTS Changes in microbial regrowth potential in water during advanced drinking water treatment were evaluated.; The apparent growth yields of microbial communities growing in effluent from each treatment step were different.; Indigenous microbial community in finished water was used to assess the changes in specific regrowth-promoting substrates.;Ikuro KasugaHitomi NakamuraFutoshi KurisuHiroaki FurumaiIWA Publishingarticleadvanced drinking water treatmentannular reactorassimilable organic carbonmicrobial regrowth potentialRiver, lake, and water-supply engineering (General)TC401-506Water supply for domestic and industrial purposesTD201-500ENH2Open Journal, Vol 4, Iss 1, Pp 157-166 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	advanced drinking water treatment annular reactor assimilable organic carbon microbial regrowth potential River, lake, and water-supply engineering (General) TC401-506 Water supply for domestic and industrial purposes TD201-500
spellingShingle	advanced drinking water treatment annular reactor assimilable organic carbon microbial regrowth potential River, lake, and water-supply engineering (General) TC401-506 Water supply for domestic and industrial purposes TD201-500 Ikuro Kasuga Hitomi Nakamura Futoshi Kurisu Hiroaki Furumai Characterization of microbial regrowth potential shaped by advanced drinking water treatment
description	Microbial regrowth in premise plumbing is a threat to water safety. Disinfectant residuals are often diminished during water transportation and stagnation, leading to the regrowth of opportunistic pathogens. Although microbial regrowth potential is mostly determined by water treatment, little is known about how each treatment step affects two key factors that contribute to microbial regrowth potential: biodegradable organic matter and microbial abundance. In this study, we operated annular reactors to evaluate the microbial regrowth potential of water shaped after each treatment step in a full-scale drinking water treatment plant with ozonation and biological activated carbon filtration. The assimilable organic carbon and total cell count (TCC) were stable at all treatment steps during the sampling period from July to October 2015. The assimilable organic carbon consumption and TCC net increase in the annular reactors indicated that apparent growth yields (cell number base) of microbial communities were different in each reactor. Regrowth potential evaluated by indigenous microbial community in finished water was reduced to 22% of that in raw water, while 75% of assimilable organic carbon in raw water remained in finished water. It suggested that treatment performance evaluated by indigenous microbial communities was better than that evaluated by assimilable organic carbon. HIGHLIGHTS Changes in microbial regrowth potential in water during advanced drinking water treatment were evaluated.; The apparent growth yields of microbial communities growing in effluent from each treatment step were different.; Indigenous microbial community in finished water was used to assess the changes in specific regrowth-promoting substrates.;
format	article
author	Ikuro Kasuga Hitomi Nakamura Futoshi Kurisu Hiroaki Furumai
author_facet	Ikuro Kasuga Hitomi Nakamura Futoshi Kurisu Hiroaki Furumai
author_sort	Ikuro Kasuga
title	Characterization of microbial regrowth potential shaped by advanced drinking water treatment
title_short	Characterization of microbial regrowth potential shaped by advanced drinking water treatment
title_full	Characterization of microbial regrowth potential shaped by advanced drinking water treatment
title_fullStr	Characterization of microbial regrowth potential shaped by advanced drinking water treatment
title_full_unstemmed	Characterization of microbial regrowth potential shaped by advanced drinking water treatment
title_sort	characterization of microbial regrowth potential shaped by advanced drinking water treatment
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/848772b86a6d4b95a25fd8761d207160
work_keys_str_mv	AT ikurokasuga characterizationofmicrobialregrowthpotentialshapedbyadvanceddrinkingwatertreatment AT hitominakamura characterizationofmicrobialregrowthpotentialshapedbyadvanceddrinkingwatertreatment AT futoshikurisu characterizationofmicrobialregrowthpotentialshapedbyadvanceddrinkingwatertreatment AT hiroakifurumai characterizationofmicrobialregrowthpotentialshapedbyadvanceddrinkingwatertreatment
_version_	1718442827005820928

Characterization of microbial regrowth potential shaped by advanced drinking water treatment

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