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Continuous gas fermentation by Acetobacterium woodii in a submerged membrane reactor with full cell retention
Abstract
Acetogenic bacteria like Acetobacterium woodii represent an ancient group of anaerobic microorganisms which use hydrogen and carbon dioxide to produce acetate. Cell concentrations and space-time yields are usually low in gas fermentations. A standard stirred‑tank bioreactor with continuous gas supply was equipped with a customized submerged microfiltration unit. A. woodii showed similar growth behavior with an initial maximal growth rate of 1.2 d(-1) in continuous gas fermentations with full cell retention and varying dilution rates. A steady increase of cell mass concentrations was observed with the highest biomass formation at the highest dilution rate. By contrast the final acetate concentrations were lowest at the highest dilution rate. The highest final acetate space-time yield of 148 g l(-1) d(-1) was measured at the highest dilution rate (increase by factor 8 compared to a standard batch process or by factor 37 compared to published data). The highest reported cell concentration of A. woodii in gas fermentations of nearly 14 g l(-1) cell dry weight was achieved in the submerged membrane bioreactor with increased yeast extract concentrations in the feed medium. Product inhibition was observed when acetate concentrations exceeded 8-12 g l(-1) causing a steady decrease in cell mass specific acetate production rates.
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“It has been demonstrated that A. woodii, for example, can be used for productive fermentations, with a space time yield of 148 g/L/d of acetate in a bioreactor with a submersed filtration unit and a final acetate concentration of 44 g/L after 11 days (Kantzow et al., 2015).”
From Gas Fermentation—A Flexible Platform for Commercial Scale Production of Low-Carbon-Fuels and Chemicals from Waste and Renewable Feedstocks (2016) · cites this paper as Kantzow et al., 2015
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Metadata
- Authors
- Kantzow, C., Mayer, A., & Weuster-Botz, D.
- Affiliations
- Technical University of Munich (DE)
- ORCID
- Mayer, Alexander
- Venue
- Journal of Biotechnology
- Publisher
- Elsevier BV
- Published
- 2015-10
- Volume
- 212
- Pages
- 11-18
- ISSN
- 0168-1656 (ISSN-L)
- OpenAlex
- W968951535
- Cited by
- 149
- References
- 23
- Citations by year
- 2026: 22 · 2025: 11 · 2024: 16 · 2023: 19 · 2022: 18 · 2021: 15 · 2020: 12 · 2019: 10 · 2018: 12 · 2017: 6 · 2016: 5 · 2015: 3
- FWCI
- 11.77
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Journal of Biotechnology (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Anaerobic Digestion and Biogas Production
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Microbial Metabolic Engineering and Bioproduction
- Physical Sciences › Chemical Engineering › Fluid Flow and Transfer Processes › Fluid Dynamics and Mixing
- Keywords
- Acetobacterium woodii, microfiltration, acetate production, dilution rate, space-time yield, cell density, product inhibition, yeast extract, acetogenic bacteria
- MeSH terms
- Acetates, Carbon Dioxide, Fermentation, Hydrogen, Biomass, Bioreactors, Acetobacterium
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