DOI: 10.1016/j.watres.2018.04.017
Scopus记录号: 2-s2.0-85047389872
论文题名: Mixed culture polyhydroxyalkanoate (PHA) synthesis from nutrient rich wet oxidation liquors
作者: Wijeyekoon S. ; Carere C.R. ; West M. ; Nath S. ; Gapes D.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 140 起始页码: 1
结束页码: 11
语种: 英语
英文关键词: Dissolved oxygen
; Feeding regime
; Hydrothermal liquor
; Nutrients
; PHA accumulation
; Polyhydroxyalkanoate
Scopus关键词: Feeding
; Nutrients
; Substrates
; Waste treatment
; Wastewater treatment
; Dissolved oxygen concentrations
; Feeding regime
; Hydrothermal liquor
; Hydrothermally treated
; Municipal wastewater treatment
; PHA accumulation
; Poly-hydroxyalkanoate
; Polyhydroxyalkanoates
; Dissolved oxygen
; ammonia
; dissolved oxygen
; polyhydroxyalkanoic acid
; bacterium
; concentration (composition)
; dissolved oxygen
; feeding
; hydrothermal activity
; nutrient
; organic pollutant
; oxidation
; polymer
; wastewater treatment
; Actinobacteria
; Article
; bacterium culture
; Bdellovibrio
; Bdellovibrio bacteriovorus
; biomass
; biomass conversion
; calculation
; carbon nitrogen ratio
; cell growth
; chemical analysis
; chemical composition
; food waste
; liquid
; microbial community
; mixed cell culture
; nonhuman
; oxidation
; oxygen concentration
; priority journal
; Proteobacteria
; pyrosequencing
; Rhodocyclaceae
; sludge
; synthesis
; Thauera
; total organic carbon
; Verrucomicrobia
; Bacteria (microorganisms)
; Bdellovibrio
; Proteobacteria
; Rhodocyclaceae
; Saprospiraceae
英文摘要: Organic waste residues can be hydrothermally treated to produce organic acid rich liquors. These hydrothermal liquors are a potential feedstock for polyhydroxyalkanoate (PHA) production. We investigated the effect of dissolved oxygen concentration and substrate feeding regimes on PHA accumulation and yield using two hydrothermal liquors derived from a mixture of primary and secondary municipal wastewater treatment sludge and food waste. The enriched culture accumulated a maximum of 41% PHA of cell dry weight within 7 h; which is among the highest reported for N and P rich hydrothermal liquors. Recovered PHA was 77% polyhydroxybutyrate and 23% polyhydroxyvalerate by mass. The families Rhodocyclaceae (84%) and Saprospiraceae (20.5%) were the dominant Proteobacteria (73%) in the enriched culture. The third most abundant bacterial genus, Bdellovibrio, includes species of known predators of PHA producers which may lead to suboptimal PHA accumulation. The PHA yield was directly proportional to DO concentration for ammonia stripped liquor (ASL) and inversely proportional to DO concentration for low strength liquor (LSL). The highest yield of 0.50 Cmol PHA/Cmol substrate was obtained for ASL at 25% DO saturation. A progressively increasing substrate feeding regime resulted in increased PHA yields. These findings demonstrate that substrate feeding regime and oxygen concentration can be used to control the PHA yield and accumulation rate thereby enhancing PHA production viability from nutrient rich biomass streams. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112692
Appears in Collections: 气候减缓与适应
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作者单位: Scion, Te Papa Tipu Innovation Park, 49 Sala Street, Private Bag 3020, Rotorua, 3046, New Zealand; GNS Science, Wairakei Research Centre, 114 Karetoto Road, Wairakei, Taupō3352, New Zealand; Bayer Animal Health, 106 Wiri Station Road, Manukau, Auckland 2104, New Zealand
Recommended Citation:
Wijeyekoon S.,Carere C.R.,West M.,et al. Mixed culture polyhydroxyalkanoate (PHA) synthesis from nutrient rich wet oxidation liquors[J]. Water Research,2018-01-01,140