DOI: 10.1016/j.watres.2018.11.023
Scopus记录号: 2-s2.0-85056720285
论文题名: Oil-in-water emulsion breaking marine bacteria for demulsifying oily wastewater
作者: Cai Q. ; Zhu Z. ; Chen B. ; Zhang B.
刊名: Water Research
ISSN: 431354
出版年: 2019
起始页码: 292
结束页码: 301
语种: 英语
英文关键词: Emulsifying bacteria
; Halomonas species
; High-throughput bacterial screening
; Marine microorganisms
; Oil-in-water emulsion
; Oily wastewater treatment
Scopus关键词: Biological water treatment
; Cell membranes
; Cytology
; Demulsification
; Emulsification
; Emulsions
; Hydrophobicity
; Throughput
; Wastewater treatment
; Bacterial screening
; Halomonas
; Marine microorganism
; Oil-in-water emulsions
; Oily wastewater treatment
; Bacteria
; biosurfactant
; DNA 16S
; water oil cream
; bacterium
; cell component
; emulsion
; hydrophobicity
; marine environment
; microbial activity
; wastewater
; wastewater treatment
; Article
; bacterial strain
; bacterium
; Canada
; cell surface
; emulsion
; Halomonas
; Halomonas venusta
; hydrophobicity
; micelle
; nonhuman
; phylogenetic tree
; priority journal
; sediment
; surface tension
; waste water
; waste water management
; Bacteria (microorganisms)
; Halomonas
; Halomonas venusta
英文摘要: Oily wastewater is a large waste stream produced by a number of industries. This wastewater often forms stable oil-in-water (O/W) emulsion. These emulsions require demulsification in order to effectively treat the water prior to release. Although biological demulsification of O/W emulsion has advantages over traditional approaches, its development is at a preliminary stage with few demulsifying bacteria reported and a need for effective screening methods for such bacteria. In this study, thirty-seven marine O/W emulsion demulsifying bacterial strains belonging to 5 genera and 15 species were reported. Cell hydrophobicity and interfacial activity played key roles in the emulsion breaking. One of the highly effective demulsifying bacteria, Halomonas venusta strain N3-2A was identified and characterized. Both its extracellular biosurfactant and cell surface contributed to demulsification resulting in breaking of 92.5% of the emulsion within 24 h. A high throughput and effective screening strategy targeting O/W emulsion breaking bacteria using oil spreading test coupled with cell hydrophobicity test was proposed. In addition, the 37 demulsifying bacteria showed a certain degree of species/genus specific patterns of surface activity and cell hydrophobicity. The reported bacteria and the screening strategy have promising potential for the biological demulsification of O/W emulsions and oily wastewater treatment. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122151
Appears in Collections: 气候变化事实与影响
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作者单位: The Northern Region Persistent Organic Pollution Control (NRPOP) Laboratory, Faculty of Engineering and Applied Science, Memorial University of Newfoundland, St. John's, Newfoundland A1B 3X5, Canada
Recommended Citation:
Cai Q.,Zhu Z.,Chen B.,et al. Oil-in-water emulsion breaking marine bacteria for demulsifying oily wastewater[J]. Water Research,2019-01-01