Cited by 149Anaerobic Digestion and Biogas ProductionMicrobial Metabolic Engineering and BioproductionFluid Dynamics and Mixing

Continuous gas fermentation by Acetobacterium woodii in a submerged membrane reactor with full cell retention

Kantzow, Christina, Mayer, Alexander, Weuster-Botz, Dirk·2015·Journal of Biotechnology

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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Crossref · 10.1016/j.jbiotec.2015.07.020

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Authors
Kantzow, C., Mayer, A., & Weuster-Botz, D.
Affiliations
Technical University of Munich (DE)
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 › Engineering › Building and Construction › Anaerobic Digestion and Biogas Production
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Microbial Metabolic Engineering and Bioproduction
  • Physical Sciences › Engineering › Biomedical Engineering › 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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