Implications of climate change: how does increased water temperature influence biofilm and water quality of chlorinated drinking water distribution systems?

Dublin Core

Título

Implications of climate change: how does increased water temperature influence biofilm and water quality of chlorinated drinking water distribution systems?

Tema

BIOPELICULAS
DECOLORACION
BACTERIAS
HONGOS
TEMPERATURA
PATOGENOS OPORTUNISTAS
BIBLIOGRAFIA NACIONAL QUIMICA
2021

Abstract

Temperature variation can promote physico-chemical and microbial changes in the water transported through distribution systems and influence the dynamics of biofilms attached to pipes, thus contributing to the release of pathogens into the bulk drinking water. An experimental real-scale chlorinated DWDS was used to study the effect of increasing temperature from 16 to 24C on specific pathogens, bacterialfungal
communities (biofilm and water samples) and determine the risk of material accumulation and mobilisation from the pipes into the bulk water. Biofilm was developed for 30 days at both temperatures in the pipe walls, and after this growth phase, a
flushing was performed applying 4 gradual steps by increasing the shear stress. The fungal-bacterial community characterised by Illumina MiSeq sequencing, and specific pathogens were studied using qPCR: Mycobacterium spp., Mycobacterium avium
complex, Acanthamoeba spp., Pseudomonas aeruginosa, Legionella pneumophilia, and Stenotrophomonas maltophilia. Sequencing data showed that temperature variation significantly modified the structure of biofilm microbial communities from the early stages of biofilm development. Regarding bacteria, Pseudomonas increased its relative abundance in biofilms developed at 24C, while fungal communities showed loss of diversity and richness, and the increase in dominance of Fusarium genus.
After the mobilisation phase, Pseudomonas continued being the most abundant genus at 24° C, followed by Sphingobium and Sphingomonas. For biofilm fungal communities after the mobilisation phase, Helotiales incertae sedis and Fusarium were
the most abundant taxa. Results from qPCR showed a higher relative abundance of Mycobacterium spp. on day 30 and M. avium complex throughout the growth phase within the biofilms at higher temperatures. The temperature impacts were not
only microbial, with physical mobilisation showing higher discolouration response and metals release due to the increased temperature. While material accumulation was
accelerated by temperature, it was not preferentially to either stronger or weaker biofilm layers, as turbidity results during the flushing steps showed. This research yields new understanding on microbial challenges that chlorinated DWDS will undergo as global temperature rises, this information is needed in order to protect drinking water quality and safety while travelling through distribution systems.

Autor

Calero Preciado, Carolina
Boxall, Joby
Soria Carrasco, Víctor
Douterelo, Isablel

Fuente

Frontiers in microbiology, v.12, 2021. -- e658927

Editor

Frontiers

Fecha

2021

Derechos

Información sobre Derechos de Autor (Por favor lea este aviso antes de abrir los documentos u objetos) 

La legislación uruguaya protege el derecho de autor sobre toda creación literaria, científica o artística, tanto en lo que tiene que ver con sus derechos morales, como en lo referente a los derechos patrimoniales con sujeción a lo establecido por el derecho común y las siguientes leyes (LEY 9.739 DE 17 DE DICIEMBRE DE 1937 SOBRE PROPIEDAD LITERARIA Y ARTISTICA CON LAS MODIFICACIONES INTRODUCIDAS POR LA LEY DE DERECHO DE AUTOR Y DERECHOS CONEXOS No. 17.616 DE 10 DE ENERO DE 2003, LEY 17.805 DE 26 DE AGOSTO DE 2004, LEY 18.046 DE 24 DE OCTUBRE DE 2006 LEY 18.046 DE 24 DE OCTUBRE DE 2006)

ADVERTENCIA - La consulta de este documento queda condicionada a la aceptación de las siguientes condiciones de uso: Este documento es únicamente para usos privados enmarcados en actividades de investigación y docencia. No se autoriza su reproducción con fines de lucro. Esta reserva de derechos afecta tanto los datos del documento como a sus contenidos. En la utilización o cita de partes debe indicarse el nombre de la persona autora.

Formato

PDF

Idioma

Inglés

Tipo

Artúclo

Identificador

10.3389/fmicb.2021.658927

Document Item Type Metadata

Original Format

PDF
Fecha de agregación
October 5, 2021
Colección
Bibliografía Nacional Química
Tipo de Elemento
Document
Etiquetas
, , , , ,
Citación
Calero Preciado, Carolina, “Implications of climate change:how does increased water temperature influence biofilm and water quality of chlorinated drinking water distribution systems?,” RIQUIM - Repositorio Institucional de la Facultad de Química - UdelaR, accessed May 29, 2022, http://riquim.fq.edu.uy/items/show/6360.
Archivos