期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 573, 期 -, 页码 313-323出版社
ELSEVIER
DOI: 10.1016/j.scitotenv.2016.08.054
关键词
Ozonation; UV radiation; Photocatalytic ozonation; Wastewater
资金
- FEDER (Fundo Europeu de Desenvolvimento Regional) [NORTE-07-0202-FEDER-038900 (NEPCAT)]
- National Funds from FCT Fundacao para a Ciencia e a Tecnologia [UlD/Multi/50016/2013-CBQF]
- STARE Stopping Antibiotic Resistance Evolution [Water JPI/0001/2013]
- Laboratory for Process Engineering, Environment, Biotechnology and Energy [UID/EQU/00511/2013-LEPABE, EQU/00511]
- FEDER funds through Programa Operacional Competitividade e Internacionalizacao (POCI) COMPETE
- CBC grant [SFRH/BPD/87152/2012]
- FEDER [POCI-01-0145-FEDER-006984]
- national funds through FCT
- European Social Fund
- Human Potential Operational Programme
- COST-European Cooperation in Science and Technology
- Fundação para a Ciência e a Tecnologia [WaterJPI/0001/2013, UID/EQU/00511/2013, SFRH/BPD/87152/2012] Funding Source: FCT
Disinfection processes aim at reducing the number of viable cells through the generation of damages in different cellular structures and molecules. Since disinfection involves unspecific mechanisms, some microbial populations may be selected due to resilience to treatment and/or to high post-treatment fitness. In this study, the bacterial community composition of secondarily treated urban wastewater and of surface water collected in the intake area of a drinking water treatment plant was compared before and 3-days after disinfection with ultraviolet radiation, ozonation or photocatalytic ozonation. The aim was to assess the dynamics of the bacterial communities during regrowth after disinfection. In all the freshly collected samples, Proteobacteria and Bacteroidetes were the predominant phyla (40-50% and 20-30% of the reads, respectively). Surface water differed from wastewater mainly in the relative abundance of Actinobacteria (17% and <5% of the reads, respectively). After 3-days storage at light and room temperature, disinfected samples presented a shift of Gammaproteobacteria (from 8 to 10% to 33-65% of the reads) and Betaproteobacteria (from 14 to 20% to 31-37% of the reads), irrespective of the type of water and disinfection process used. Genera such as Pseudomonas, Acinetobacter or Rheinheimera presented a selective advantage after water disinfection. These variations were not observed in the non-disinfected controls. Given the ubiquity and genome plasticity of these bacteria, the results obtained suggest that disinfection processes may have implications on the microbiological quality of the disinfected water. (C) 2016 Elsevier B.V. All rights reserved.
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