DOI: 10.1016/j.watres.2018.07.015
Scopus记录号: 2-s2.0-85053062031
论文题名: Using photocatalyst powder to enhance the coagulation and sedimentation of cyanobacterial cells and enable the sludge to be self-purified under visible light
作者: Jin Y. ; Xu H. ; Ma C. ; Sun J. ; Li H. ; Zhang S. ; Pei H.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 143 起始页码: 550
结束页码: 560
语种: 英语
英文关键词: Ballasted coagulation
; Cyanobacteria
; Photocatalysis
; Self-purification
; Sludge reuse
Scopus关键词: Cells
; Chemical bonds
; Coagulation
; Cost effectiveness
; Cytology
; Electronegativity
; Irradiation
; Nitrogen compounds
; Photocatalysis
; Photodegradation
; Potable water
; Purification
; Titanium dioxide
; Water quality
; Coagulation and sedimentation
; Cost-effective technology
; Cyanobacteria
; Drinking water production
; Microcystis aeruginosa
; Self-purification
; Sludge reuse
; Visible-light irradiation
; Light
; catalysis
; catalyst
; cell component
; coagulation
; concentration (composition)
; cyanobacterium
; drinking water
; inorganic compound
; light intensity
; purification
; sedimentation
; sludge
; toxin
; water quality
; algae
; Cyanobacteria
; Microcystis aeruginosa
英文摘要: Removing harmful cyanobacteria intact by coagulation can prevent cell lysis and toxin release, which provides many benefits for drinking water production, including reduction of the burden on subsequent processes and guaranteeing the water quality. But the electronegativity and buoyancy of cyanobacterial cells make them settle slowly and their accumulation and concentration in flocs would still have severe adverse effects. In this study, we introduced a photocatalyst powder to act as a ballasting agent in the coagulation process and to degrade the cells and cyanotoxins during sludge storage. Results showed that adding N-TiO2 would decrease the coagulant dose to half of the conventional value, and also allow Microcystis aeruginosa cells to completely settle within 10 min. During sludge storage, the algal cells, cyanotoxins and other organics in sludge would be degraded to safe levels after 32 h’ visible-light irradiation. Meanwhile, the N-TiO2, water and some of the coagulant in purified sludge will be directly and safely reused. Thus, this is an environmentally friendly and cost-effective technology which incorporates photocatalyst in algal flocs to enhance coagulation and sedimentation and to enable the sludge produced to be self-purified under visible-light. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112546
Appears in Collections: 气候减缓与适应
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作者单位: School of Environmental Science and Engineering, Shandong University, Jinan, 250100, China; Shandong Provincial Engineering Centre for Environmental Science and Technology, Jinan, 250061, China
Recommended Citation:
Jin Y.,Xu H.,Ma C.,et al. Using photocatalyst powder to enhance the coagulation and sedimentation of cyanobacterial cells and enable the sludge to be self-purified under visible light[J]. Water Research,2018-01-01,143