DOI: 10.1016/j.watres.2018.04.028
Scopus记录号: 2-s2.0-85047982935
论文题名: Denitrifying sulfur conversion-associated EBPR: Effects of temperature and carbon source on anaerobic metabolism and performance
作者: Guo G. ; Wu D. ; Ekama G.A. ; Hao T. ; Mackey H.R. ; Chen G.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 141 起始页码: 9
结束页码: 18
语种: 英语
英文关键词: Anaerobic metabolism
; Carbon source
; Enhanced biological phosphorus removal
; Optimization
; Sulfur conversion
; Temperature
Scopus关键词: Bacteria
; Biological water treatment
; Carbon
; Denitrification
; Metabolism
; Nitrogen removal
; Optimization
; Phosphorus
; Physiology
; Sulfur
; Sulfur compounds
; Temperature
; Volatile fatty acids
; Wastewater treatment
; Anaerobic metabolism
; Carbon source
; Enhanced biological phosphorus removal
; Environmental conditions
; Glycogen accumulating organisms
; Performance optimizations
; Sulfate reducing bacteria
; Sulfide-oxidizing bacteria
; Chemicals removal (water treatment)
; acetic acid
; glycogen
; nitrogen
; phosphorus
; propionic acid
; sulfur
; carbon
; propionic acid derivative
; salt water
; sulfur
; anaerobic metabolism
; Article
; bacterium culture
; carbon source
; controlled study
; denitrification
; enhanced biological phosphorus removal
; heavy metal removal
; nonhuman
; pH
; priority journal
; sludge
; stoichiometry
; sulfate reducing bacterium
; sulfide oxidizing bacterium
; temperature
; temperature sensitivity
; anaerobic growth
; bacterium
; bioreactor
; denitrification
; kinetics
; metabolism
; waste water
; Acetates
; Anaerobiosis
; Bacteria
; Bioreactors
; Carbon
; Denitrification
; Kinetics
; Nitrogen
; Phosphorus
; Propionates
; Saline Waters
; Sulfur
; Temperature
; Waste Water
英文摘要: The recently developed Denitrifying Sulfur conversion-associated Enhanced Biological Phosphorus Removal (DS-EBPR) process has demonstrated simultaneous removal of organics, nitrogen and phosphorus with minimal sludge production in the treatment of saline/brackish wastewater. Its performance, however, is sensitive to operating and environmental conditions. In this study, the effects of temperature (20, 25, 30 and 35 °C) and the ratio of influent acetate to propionate (100–0, 75–25, 50-50, 25–75 and 0–100%) on anaerobic metabolism were investigated, and their optimal values/controls for performance optimization were identified. A mature DS-EBPR sludge enriched with approximately 30% sulfate-reducing bacteria (SRB) and 33% sulfide-oxidizing bacteria (SOB) was used in this study. The anaerobic stoichiometry of this process was insensitive to temperature or changes in the carbon source. However, an increase in temperature from 20 to 35 °C accelerated the kinetic reactions of the functional bacteria (i.e. SRB and SOB) and raised the energy requirement for their anaerobic maintenance, while a moderate temperature (25–30 °C) resulted in better P removal (≥93%, 18.6 mg P/L removal from total 20 mg P/L in the influent) with a maximum sulfur conversion of approximately 16 mg S/L. These results indicate that the functional bacteria are likely to be mesophilic. When a mixed carbon source (75–25 and 50-50% acetate to propionate ratios) was supplied, DS-EBPR achieved a stable P removal (≥89%, 17.8 mg P/L for 400 mg COD/L in the influent) with sulfur conversions at around 23 mg S/L, suggesting the functional bacteria could effectively adapt to changes in acetate or propionate as the carbon source. The optimal temperatures or carbon source conditions maximized the functional bacteria competition against glycogen-accumulating organisms by favoring their activity and synergy. Therefore, the DS-EBPR process can be optimized by setting the temperature in the appropriate range (25–30 °C) and/or manipulating influent carbon sources. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112668
Appears in Collections: 气候减缓与适应
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作者单位: Department of Civil & Environmental Engineering, The Hong Kong University of Science and Technology, Hong Kong; Hong Kong Branch of the Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, The Hong Kong University of Science and Technology, Hong Kong; Wastewater Treatment Laboratory, FYT Graduate School, The Hong Kong University of Science and Technology, Nansha, Guangzhou, Hong Kong; Water Research Group, Department of Civil Engineering, University of Cape Town, Cape Town, South Africa; Department of Civil and Environmental Engineering, Faculty of Science and Technology, University of Macau, Macau, China; Division of Sustainable Development, College of Science and Engineering, Hamad Bin Khalifa University, Qatar Foundation, Doha, Qatar
Recommended Citation:
Guo G.,Wu D.,Ekama G.A.,et al. Denitrifying sulfur conversion-associated EBPR: Effects of temperature and carbon source on anaerobic metabolism and performance[J]. Water Research,2018-01-01,141