ArticleBiotechnology for biofuels2016
Effect of tungstate on acetate and ethanol production by the electrosynthetic bacterium Sporomusa ovata.
Article in Biotechnology for biofuels, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.
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16 citing papers in PubMed, 89 citations in OpenAlex.
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- Biomass-specific rates as key performance indicators: A nitrogen balancing method for biofilm-based electrochemical conversion.Frontiers in bioengineering and biotechnology · 2023Article
- Advances in Biomimetic Photoelectrocatalytic Reduction of Carbon Dioxide.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2022Review
- The Potential of Sequential Fermentations in Converting C1 Substrates to Higher-Value Products.Frontiers in microbiology · 2022Review
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- Reactor Designs and Configurations for Biological and Bioelectrochemical C1 Gas Conversion: A Review.International journal of environmental research and public health · 2021Review
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- A variety of hydrogenotrophic enrichment cultures catalyse cathodic reactions.Scientific reports · 2019Article
- Role of Trace Elements as Cofactor: An Efficient Strategy toward Enhanced Biobutanol Production.ACS sustainable chemistry & engineering · 2018Article
- Freestanding and flexible graphene papers as bioelectrochemical cathode for selective and efficient COScientific reports · 2017Article
- Energy Efficiency and Productivity Enhancement of Microbial Electrosynthesis of Acetate.Frontiers in microbiology · 2017Article
- Hybrid photosynthesis-powering biocatalysts with solar energy captured by inorganic devices.Biotechnology for biofuels · 2017Review
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Authors and funding
4 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundMicrobial electrosynthesis (MES) and gas fermentation are bioenergy technologies in which a microbial catalyst reduces CO2 into organic carbon molecules with electrons from the cathode of a bioelectrochemical system or from gases such as H2. The acetogen Sporomusa ovata has the capacity of reducing CO2 into commodity chemicals by both gas fermentation and MES. Acetate is often the only product generated by S. ovata during autotrophic growth.
resultsIn this study, trace elements in S. ovata growth medium were optimized to improve MES and gas fermentation productivity. Augmenting tungstate concentration resulted in a 2.9-fold increase in ethanol production by S. ovata during H2:CO2-dependent growth. It also promoted electrosynthesis of ethanol in a S. ovata-driven MES reactor and increased acetate production 4.4-fold compared to unmodified medium. Furthermore, fatty acids propionate and butyrate were successfully converted to their corresponding alcohols 1-propanol and 1-butanol by S. ovata during gas fermentation. Increasing tungstate concentration enhanced conversion efficiency for both propionate and butyrate. Gene expression analysis suggested that tungsten-containing aldehyde ferredoxin oxidoreductases (AORs) and a tungsten-containing formate dehydrogenase (FDH) were involved in the improved biosynthesis of acetate, ethanol, 1-propanol, and 1-butanol. AORs and FDH contribute to the fatty acids re-assimilation pathway and the Wood-Ljungdahl pathway, respectively.
conclusionsThis study presented here shows that optimization of microbial catalyst growth medium can improve productivity and lead to the biosynthesis of different products by gas fermentation and MES. It also provides insights on the metabolism of biofuels production in acetogens and demonstrates that S. ovata has an important untapped metabolic potential for the production of other chemicals than acetate via CO2-converting bioprocesses including MES.
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