Lactic acid fermentation of crude sorghum extract

Journal Article · Tue Apr 01 04:00:00 EST 1980 · Biotechnol. Bioeng.; (United States)

DOI:https://doi.org/10.1002/bit.260220404· OSTI ID:5905386

Samuel, W A; Lee, Y Y; Anthony, W B

Crude extract from sweet sorghum supplemented with vetch juice was utilized as the carbohydrate source for fermentative production of lactic acid. Fermentation of media containing 7% (w/v) total sugar was completed in 60-80 hours by Lactobacillus plantarum, product yield averaging 85%. Maximum acid production rates were dependent on pH, initial substrate distribution, and concentration, the rates varying from 2 to 5 g/liter per hour. Under limited medium supplementation the lactic acid yield was lowered to 67%. The fermented ammoniated product contained over eight times as much equivalent crude protein (N x 6.25) as the original medium. Unstructured kinetic models were developed for cell growth, lactic acid formation, and substrate consumption in batch fermentation. With the provision of experimentally determined kinetic parameters, the proposed models accurately described the fermentation process. 15 references.

• Research Organization: Auburn Univ., AL
• OSTI ID: 5905386
• Journal Information: Biotechnol. Bioeng.; (United States), Journal Name: Biotechnol. Bioeng.; (United States) Vol. 22:4; ISSN BIBIA
• Country of Publication: United States
• Language: English

Related Subjects

550700* -- Microbiology
59 BASIC BIOLOGICAL SCIENCES
BACTERIA
BATCH CULTURE
BIOCHEMICAL REACTION KINETICS
BIOCONVERSION
BIOSYNTHESIS
CARBOXYLIC ACIDS
CEREALS
CHEMICAL REACTION YIELD
CULTURE MEDIA
FERMENTATION
GRASS
GROWTH
HYDROXY ACIDS
KINETICS
LACTIC ACID
LACTOBACILLUS
MATHEMATICAL MODELS
MICROORGANISMS
ORGANIC ACIDS
ORGANIC COMPOUNDS
PH VALUE
PLANTS
PROTEINS
REACTION KINETICS
SORGHUM
SUBSTRATES
SYNTHESIS
YIELDS