Electrolyzing lactic acid in situ in fermentation broth to produce pyruvic acid in electrolysis cell

Pyruvic acid is an important chemical in the carboxylate platform. Obstacles for its implementation are the need for high energy in chemical synthesis and additives in fermentation leading to increased production costs. Here, pyruvic acid generation from direct conversion of lactic acid in fermentat...

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Bibliographic Details
Published inApplied microbiology and biotechnology Vol. 103; no. 10; pp. 4045 - 4052
Main Authors Xixi, Zhu, Qian, Peng, Wang, Buyun
Format Journal Article
LanguageEnglish
Published Berlin/Heidelberg Springer Berlin Heidelberg 01.05.2019
Springer
Springer Nature B.V
Subjects
Acid production
Acids
Additives
Anolytes
Biomedical and Life Sciences
Biotechnological Products and Process Engineering
Biotechnology
Chemical properties
Chemical synthesis
Direct conversion
Electrolysis
Electrolysis (Chemistry)
Energy conversion efficiency
Energy efficiency
Energy management
Fermentation
Hydrogen
Lactic acid
Life Sciences
Manufacturing costs
Methods
Microbial Genetics and Genomics
Microbiology
Organic chemistry
Production costs
Production management
Production processes
Pyruvic acid
Pyruvic acid
Lactic acid
Electrolysis
Alkaline condition
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Summary:Pyruvic acid is an important chemical in the carboxylate platform. Obstacles for its implementation are the need for high energy in chemical synthesis and additives in fermentation leading to increased production costs. Here, pyruvic acid generation from direct conversion of lactic acid in fermentation broth by electrolysis method is presented. It was found that lactic acid could be converted to pyruvic acid in the electrolysis cell under alkaline conditions. Using 12.53 g/L lactic acid fermentation broth as anolyte, 7.01 g/L pyruvic acid could be produced and productivity to lactic acid was 57.66% at initial pH 11.74 and 5.0 V applied a voltage in the electrolysis cell. Meanwhile, 0.472 mol hydrogen was produced at the cathode. The electric energy efficiency was 76.18%. Lactic acid fermentation is relatively cheap and can be performed on many kinds of wastes and biomasses. The results suggest that pyruvic acid production from direct electrolysis of lactic acid fermentation broth can be economically feasible.
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ISSN:0175-7598
1432-0614
DOI:10.1007/s00253-019-09793-0