DOI: 10.1016/j.watres.2017.12.009
Scopus记录号: 2-s2.0-85038112742
论文题名: Granulation and microbial community dynamics in the chitosan-supplemented anaerobic treatment of wastewater polluted with organic solvents
作者: Torres K. ; Álvarez-Hornos F.J. ; San-Valero P. ; Gabaldón C. ; Marzal P.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 130 起始页码: 376
结束页码: 387
语种: 英语
英文关键词: Chitosan
; DGGE
; Granulation
; High-throughput sequencing
; Solvents
; UASB
Scopus关键词: Electrophoresis
; Granulation
; Methanogens
; Organic solvents
; Particles (particulate matter)
; Solvents
; Throughput
; Wastewater treatment
; Denaturing gradient gel electrophoreses (DGGE)
; DGGE
; Extracellular polymeric substances
; High-throughput sequencing
; Hydrogenotrophic methanogens
; Physicochemical characteristics
; UASB
; Up-flow anaerobic sludge blanket reactors
; Chitosan
; 2 propanol
; acetic acid ethyl ester
; alcohol
; chitosan
; organic solvent
; polymer
; chitosan
; solvent
; anoxic conditions
; bioreactor
; chemical oxygen demand
; community dynamics
; dose-response relationship
; fatty acid
; grain size
; microbial community
; pollutant removal
; sludge
; solvent
; wastewater treatment
; Article
; denaturing gradient gel electrophoresis
; environmental temperature
; Geobacter
; high throughput sequencing
; Methanocorpusculum
; Methanocorpusculum labreanum
; Methanosaeta
; microbial community
; molecular biology
; nonhuman
; polymer production
; priority journal
; sludge
; waste water management
; anaerobic growth
; biochemical oxygen demand
; bioreactor
; chemistry
; devices
; genetics
; metabolism
; Methanomicrobiales
; microbiology
; microflora
; particle size
; physiology
; procedures
; sewage
; waste water
; water pollutant
; Geobacter
; Methanocorpusculum labreanum
; Methanosaeta
; Anaerobiosis
; Biological Oxygen Demand Analysis
; Bioreactors
; Chitosan
; Geobacter
; Methanomicrobiales
; Microbiota
; Particle Size
; Polymers
; Sewage
; Solvents
; Waste Disposal, Fluid
; Waste Water
; Water Pollutants, Chemical
英文摘要: The effect of chitosan on the development of granular sludge in upflow anaerobic sludge blanket reactors (UASB) when treating wastewater polluted with the organic solvents ethanol, ethyl acetate, and 1-ethoxy-2-propanol was evaluated. Three UASB reactors were operated for 219 days at ambient temperature with an organic loading rate (OLR) of between 0.3 kg COD m−3 d−1 and 20 kg COD m−3 d−1. One reactor was operated without the addition of chitosan, while the other two were operated with the addition of chitosan doses of 2.4 mg gVSS−1 two times. The three reactors were all able to treat the OLR tested with COD removal efficiencies greater than 90%. However, the time required to reach stable operation was considerably reduced in the chitosan-assisted reactors. The development of granules in the reactors with chitosan was accelerated and granules larger than 2000 μm were only observed in these reactors. In addition, these granules exhibited better physicochemical characteristics: the mean particle diameter (540 and 613 μm) was approximately two times greater than in the control reactor (300 μm), and the settling velocities exceeded 35 m h−1. The extracellular polymeric substances (EPS) in the reactors with the chitosan was found to be higher than in the control reactor. The protein-EPS content has been correlated with the granule size. The analyses of the microbial communities, performed through denaturing gradient gel electrophoresis and high-throughput sequencing, revealed that the syntrophic microorganisms belonging to genus Geobacter and the hydrogenotrophic methanogen Methanocorpusculum labreanum were predominant in the granules. Other methanogens like Methanosaeta species were found earlier in the chitosan-assisted reactors than in the control reactor. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113056
Appears in Collections: 气候减缓与适应
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作者单位: Research Group on Environmental Engineering (GI2AM), Department of Chemical Engineering, Universitat de València, Av. de la Universitat s/n, Burjassot, 46100, Spain
Recommended Citation:
Torres K.,Álvarez-Hornos F.J.,San-Valero P.,et al. Granulation and microbial community dynamics in the chitosan-supplemented anaerobic treatment of wastewater polluted with organic solvents[J]. Water Research,2018-01-01,130