Microbial electrosynthesis system with dual biocathode arrangement for simultaneous acetogenesis, solventogenesis and carbon chain elongation

2019 ◽  
Vol 55 (30) ◽  
pp. 4351-4354 ◽  
Author(s):  
Igor Vassilev ◽  
Frauke Kracke ◽  
Stefano Freguia ◽  
Jürg Keller ◽  
Jens O. Krömer ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Carboxylic Acids ◽  
Carbon Chain ◽  
Chain Elongation ◽  
Microbial Electrosynthesis

A microbial electrosynthesis cell comprising two biological cathode chambers sharing the same anode compartment is used to promote the production of C2–C4 carboxylic acids and alcohols from carbon dioxide.

Development of a highly specific and productive process for n-caproic acid production: applying lessons from methanogenic microbiomes

2013 ◽  
Vol 69 (1) ◽  
pp. 62-68 ◽  
Author(s):  
M. T. Agler ◽  
C. M. Spirito ◽  
J. G. Usack ◽  
J. J. Werner ◽  
L. T. Angenent
Keyword(s):  
Carboxylic Acids ◽  
Acid Production ◽  
Waste Treatment ◽  
Liquid Product ◽  
Ph Control ◽  
Caproic Acid ◽  
Carbon Chain ◽  
Chain Elongation ◽  
Acid Extraction ◽  
High Productivity

High productivity and specificity in anaerobic digesters arise because complex microbiomes organize into a metabolic cascade to maximize energy recovery and to utilize the advantage that the gaseous end product methane freely bubbles out of the system. These lessons were applied to ascertain whether a reactor microbiome could be shaped to produce a different end product. The liquid product n-caproic acid was chosen, which is a 6-carbon-chain carboxylic acid that is valuable and that has a relatively low maximum solubility concentration for product recovery. Acetoclastic methanogenesis was inhibited by pH control and a route was provided for n-caproic acid extraction by implementing selective, in-line recovery. Next, ethanol was supplemented to promote chain elongation, which is a pathway in which short-chain carboxylic acids are elongated sequentially into medium-chain carboxylic acids with two-carbon units derived from ethanol. The reactor microbiome developed accordingly with the terminal process catalyzed by chain-elongating bacteria. As a result, n-caproic acid production rates increased to levels comparable to anaerobic digestion systems for solid waste treatment.

Zinc: A promising material for electrocatalyst-assisted microbial electrosynthesis of carboxylic acids from carbon dioxide

2019 ◽  
Vol 159 ◽  
pp. 87-94 ◽  
Author(s):  
Yong Jiang ◽  
Na Chu ◽  
Wei Zhang ◽  
Junjun Ma ◽  
Fang Zhang ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Carboxylic Acids ◽  
Promising Material ◽  
Microbial Electrosynthesis

Anaerobic caproate production on carbon chain elongation: Effect of lactate/butyrate ratio, concentration and operation mode

2021 ◽  
Vol 329 ◽  
pp. 124893
Author(s):  
Shanbiao Xie ◽  
Jingwei Ma ◽  
Lu Li ◽  
Qiulai He ◽  
Peng Xu ◽  
...  
Keyword(s):  
Operation Mode ◽  
Carbon Chain ◽  
Chain Elongation

scholarly journals A Comprehensive Understanding of Electro-Fermentation

Fermentation ◽  
2020 ◽  
Vol 6 (3) ◽  
pp. 92 ◽  
Author(s):  
Drishti Dinesh Bhagchandanii ◽  
Rishi Pramod Babu ◽  
Jayesh M. Sonawane ◽  
Namita Khanna ◽  
Soumya Pandit ◽  
...  
Keyword(s):  
Metabolic Pathways ◽  
Biomass Yield ◽  
Carbon Chain ◽  
Industrial Applications ◽  
Chain Elongation ◽  
Comprehensive Understanding ◽  
Specific Product ◽  
Microbial Strains ◽  
Metabolic Reactions ◽  
Almost All

Electro-fermentation (EF) is an upcoming technology that can control the metabolism of exoelectrogenic bacteria (i.e., bacteria that transfer electrons using an extracellular mechanism). The fermenter consists of electrodes that act as sink and source for the production and movement of electrons and protons, thus generating electricity and producing valuable products. The conventional process of fermentation has several drawbacks that restrict their application and economic viability. Additionally, metabolic reactions taking place in traditional fermenters are often redox imbalanced. Almost all metabolic pathways and microbial strains have been studied, and EF can electrochemically control this. The process of EF can be used to optimize metabolic processes taking place in the fermenter by controlling the redox and pH imbalances and by stimulating carbon chain elongation or breakdown to improve the overall biomass yield and support the production of a specific product. This review briefly discusses microbe-electrode interactions, electro-fermenter designs, mixed-culture EF, and pure culture EF in industrial applications, electro methanogenesis, and the various products that could be hence generated using this process.

Characterizing hydrogen and tetrel bonds in clusters of CO2 with carboxylic acids.

2021 ◽  
Author(s):  
Weixing Li ◽  
Sonia Melandri ◽  
Luca Evangelisti ◽  
Camilla Calabrese ◽  
Annalisa Vigorito ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Carboxylic Acids ◽  
Quantum Chemical ◽  
Microwave Spectrum ◽  
Quantum Chemical Modeling ◽  
Chemical Modeling ◽  
Tetrel Bonds

The interaction between carbon dioxide and planar carboxylic acids has been investigated through the analysis of the microwave spectrum of the acrylic acid·CO2 complex and quantum chemical modeling of the...

STUDY OF THE RADIOLYSIS OF BROMAL HYDRATE SOLUTIONS USING C14-LABELLED BROMAL

1959 ◽  
Vol 37 (7) ◽  
pp. 1127-1131 ◽  
Author(s):  
H. Heusinger ◽  
R. J. Woods ◽  
J. W. T. Spinks
Keyword(s):  
Carbon Dioxide ◽  
Carboxylic Acid ◽  
Carboxylic Acids ◽  
Carbonyl Group

Bromal labelled with C14 in the carbonyl group has been used to show that small amounts of carbon dioxide and carboxylic acids are produced in the radiolysis of aqueous bromal solutions. G values for the production of CO2 and carboxylic acid are about 7.5% and 15% of those for HBr production, respectively. The observed yield of carboxylic acid is in agreement with that found by titration.

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