DOI: 10.1016/j.watres.2018.12.025
Scopus记录号: 2-s2.0-85060113936
论文题名: Volatile fatty acids impacting phototrophic growth kinetics of purple bacteria: Paving the way for protein production on fermented wastewater
作者: Alloul A. ; Wuyts S. ; Lebeer S. ; Vlaeminck S.E.
刊名: Water Research
ISSN: 431354
出版年: 2019
起始页码: 138
结束页码: 147
语种: 英语
英文关键词: Carbon capture
; Carboxylate platform
; Phototrophic purple bacteria
; Short-chain fatty acids
; Single-cell protein
Scopus关键词: Bacteria
; Biomass
; Carbon capture
; Carboxylation
; Costs
; Ecology
; Growth kinetics
; Growth rate
; Mixtures
; Natural resources
; Proteins
; Carboxylate platforms
; Purple bacteria
; Purple non-sulfur bacteria
; Rhodobacter sphaeroides
; Rhodopseudomonas palustris
; Short-chain fatty acids
; Single cell proteins
; Volatile fatty acids (VFAs)
; Volatile fatty acids
; acetic acid
; butyric acid
; propionic acid
; volatile fatty acid
; bacterium
; bioreactor
; decarboxylation
; fatty acid
; fermentation
; growth rate
; photoautotrophy
; production cost
; protein
; reaction kinetics
; sludge
; wastewater treatment
; anaerobic fermentation
; Article
; bacterial growth
; bacterium culture
; bacterium isolate
; biomass production
; dry weight
; economic aspect
; fermentation
; infrared radiation
; kinetics
; microbial community
; nonhuman
; photoheterotroph
; phototrophy
; priority journal
; protein synthesis
; recycling
; Rhodobacter sphaeroides
; Rhodopseudomonas palustris
; Rhodospirillaceae
; Rhodospirillum rubrum
; solids retention time
; waste water
; Animalia
; Proteobacteria
; Rhodobacter
; Rhodobacter sphaeroides
; Rhodopseudomonas
; Rhodopseudomonas palustris
; Rhodospirillum rubrum
英文摘要: Nutrient losses in our food chain severely surpass our planetary boundaries. Resource recovery can contribute to mitigation, for instance through converting wastewater resources to microbial protein for animal feed. Wastewater typically holds a complex mixture of organics, posing a challenge to selectively produce heterotrophic biomass. Ensuring the product's quality could be achieved by anaerobic generation of volatile fatty acids (VFAs) followed by photoheterotrophic production of purple non-sulfur bacteria (PNSB) with infrared light. This study aimed to determine the most suitable PNSB culture for VFA conversion and map the effect of acetate, propionate, butyrate and a VFA mixture on growth and biomass yield. Six cultures were screened in batch: (i) Rhodopseudomonas palustris, (ii) Rhodobacter sphaeroides, (iii) Rhodospirillum rubrum, (iv) a 3-species synthetic community (i+ii+iii), (v) a community enriched on VFA holding Rb. capsulatus, and (vi) Rb. capsulatus (isolate ‘v’). The VFA mixture elevated growth rates with a factor 1.3–2.5 compared to individual VFA. Rb. capsulatus showed the highest growth rates: 1.8–2.2 d−1 (enriched) and 2.3–3.8 d−1 (isolated). In a photobioreactor (PBR) inoculated with the Rb. capsulatus enrichment, decreasing sludge retention time (SRT) yielded lower biomass concentrations, yet increased productivities, reaching 1.7 g dry weight (DW) L−1 d−1, the highest phototrophic rate reported thus far, and a growth rate of up to 5 d−1. PNSB represented 26–57% of the community and the diversity index was low (3–7), with a dominance of Rhodopseudomonas at long SRT and Rhodobacter at short SRT. The biomass yield for all cultures, in batch and reactor cultivation, approached 1 g CODBiomass g−1 CODRemoved. An economic estimation for a two-stage approach on brewery wastewater (load 2427 kg COD d−1) showed that 0.5 d SRT allowed for the lowest production cost (€ 10 kg−1 DW; equal shares for capex and opex). The findings strengthen the potential for a novel two-stage approach for resource recovery from industrial wastewater, enabling high-rate PNSB production. © 2019 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122017
Appears in Collections: 气候变化事实与影响
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作者单位: Research Group of Sustainable Energy, Air and Water Technology, Department of Bioscience Engineering, University of Antwerp, Groenenborgerlaan 171, Antwerpen, 2020, Belgium; Research Group of Environmental Ecology & Microbiology, Department of Bioscience Engineering, University of Antwerp, Groenenborgerlaan 171, Antwerpen, 2020, Belgium
Recommended Citation:
Alloul A.,Wuyts S.,Lebeer S.,et al. Volatile fatty acids impacting phototrophic growth kinetics of purple bacteria: Paving the way for protein production on fermented wastewater[J]. Water Research,2019-01-01