DOI: 10.1016/j.watres.2018.10.062
Scopus记录号: 2-s2.0-85058991333
论文题名: Inhibition of regrowth of planktonic and biofilm bacteria after peracetic acid disinfection
作者: Zhang C. ; Brown P.J.B. ; Miles R.J. ; White T.A. ; Grant D.G. ; Stalla D. ; Hu Z.
刊名: Water Research
ISSN: 431354
出版年: 2019
起始页码: 640
结束页码: 649
语种: 英语
英文关键词: Bacterial regrowth
; Biofilm
; Disinfection
; Free chlorine
; Peracetic acid
; Planktonic bacteria
Scopus关键词: Bacteria
; Bacteriology
; Biofilms
; Biogeochemistry
; Cells
; Cytology
; Decay (organic)
; Disinfectants
; Disinfection
; Efficiency
; Organic compounds
; Scanning electron microscopy
; Bacterial regrowth
; Environmental scanning electron microscopies (ESEM)
; Free chlorine
; Peracetic acids
; Planktonic bacteria
; Planktonic cells
; Pseudomonas aeruginosa
; Self-decomposition
; Chlorine
; chlorine
; disinfectant agent
; organic matter
; peracetic acid
; RNA 16S
; acetic acid
; bacterium
; biofilm
; cell
; chlorine
; concentration (composition)
; disinfection
; inhibition
; organic matter
; regrowth
; Article
; Bacillus
; bacterial cell
; bacterial strain
; biofilm
; cell disruption
; cell structure
; disinfection
; lysogenization
; nonhuman
; plankton
; priority journal
; Pseudomonas aeruginosa
; scanning electron microscopy
; Bacillus sp.
; Bacteria (microorganisms)
; Negibacteria
; Posibacteria
; Pseudomonas aeruginosa
英文摘要: Peracetic acid (PAA) is a promising alternative to chlorine for disinfection; however, bacterial regrowth after PAA disinfection is poorly understood. This study compared the regrowth of bacteria (Gram-negative Pseudomonas aeruginosa PAO1 and Gram-positive Bacillus sp.) after disinfection with PAA or free chlorine. In the absence of organic matter, PAA and free chlorine prevented the regrowth of planktonic cells of P. aeruginosa PAO1 at C·t (= disinfectant concentration × contact time) doses of (28.5 ± 9.8) mg PAA·min·L −1 and (22.5 ± 10.6) mg Cl 2 ·min·L −1 , respectively, suggesting that they had comparable efficiencies in preventing the regrowth of planktonic bacteria. For comparison, the minimum C·t doses of PAA and free chlorine to prevent the regrowth of P. aeruginosa PAO1 biofilm cells in the absence of organic matter were (14,000 ± 1,732) mg PAA·min·L −1 and (6,500 ± 2,291) mg Cl 2 ·min·L −1 , respectively. PAA was less effective than free chlorine in killing bacteria within biofilms in the absence of organic matter most likely because PAA reacts with biofilm matrix constituents slower than free chlorine. In the presence of organic matter, although the bactericidal efficiencies of both disinfectants significantly decreased, PAA was less affected due to its slower reaction with organic matter and/or slower self-decomposition. For instance, in a dilute Lysogeny broth-Miller, the minimum concentrations of PAA and free chlorine to prevent the regrowth of planktonic P. aeruginosa PAO1 were 20 mg PAA·L −1 and 300 mg Cl 2 ·L −1 , respectively. While both disinfectants are strong oxidants disrupting cell membrane, environmental scanning electron microscopy (ESEM) revealed that PAA made holes in the center of the cells, whereas free chlorine desiccated the cells. Overall, this study shows that PAA is a powerful disinfectant to prevent bacterial regrowth even in the presence of organic matter. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122119
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Civil & Environmental Engineering, University of Missouri, Columbia, MO 65211, United States; Division of Biological Sciences, University of Missouri, Columbia, MO 65211, United States; College of Agriculture, Food and Natural Resources (CAFNR), University of Missouri, Columbia, MO 65211, United States; Department of Biochemistry, University of Missouri, Columbia, MO 65211, United States; Electron Microscopy Core Facility, University of Missouri, Columbia, MO 65211, United States
Recommended Citation:
Zhang C.,Brown P.J.B.,Miles R.J.,et al. Inhibition of regrowth of planktonic and biofilm bacteria after peracetic acid disinfection[J]. Water Research,2019-01-01