Journal ArticleDOI
Kinetics of lactic acid fermentation on glucose and corn by Lactobacillus amylophilus
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In this article, the authors studied the biosynthesis of ammonium lactate, a product of lactic acid fermentation, from corn and glucose at five different pH values of 5.4 to 7.8.Abstract:
The biosynthesis of ammonium lactate, a product of lactic acid fermentation was studied from corn and glucose at five different pH values of 5.4 to 7.8. In the glucose fermentations, a 100% conversion of substrate was obtained resulting in a maximum lactic acid production yield of 93.2%. The optimum pH for the maximum volumetric rate of lactic acid biosynthesis (1.56 g dm−3 h−1) was between 6.0 and 6.5. The corn fermentations were slower than the glucose fermentations with a resulting lactic acid yield of 67.5%. Hydrolysis of corn by enzymatic or chemical methods as well as the use of ammonium hydroxide for pH control increased both the final concentration and the rates of lactic acid production. An enhanced yield of more than 90% was finally obtained in the corn fermentations. A logistic model adequately described the kinetics of biomass growth, lactic acid production and sugar utilization in the glucose fermentations at different pH values. The dynamics of lactic acid formation in the corn fermentations were also successfully described by the developed model. The dependence of the model parameters on pH was investigated.read more
Citations
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Journal ArticleDOI
Factors affecting the fermentative lactic acid production from renewable resources1
TL;DR: Parameters affecting the fermentative lactic acid (LA) production are summarized and discussed: microorganism, carbon- and nitrogen-source, fermentation mode, pH, and temperature.
Journal ArticleDOI
Lactic acid properties, applications and production: a review.
Fabio Andres Castillo Martinez,Eduardo Marcos Balciunas,José Manuel Salgado,Jose J. Gonzalez,Attilio Converti,Ricardo Pinheiro de Souza Oliveira +5 more
TL;DR: In this article, a review describes biotechnological processes to obtain lactic acid from polymeric substrates such as starchy and lignocellulosic materials.
Journal ArticleDOI
Amylolytic bacterial lactic acid fermentation - a review.
TL;DR: This is the first review on amylolytic bacterial lactic acid fermentations till date, and Lactobacillus amylophilus GV6 is an efficient and widely studied amymolytic lactic Acid producing bacteria capable of utilizing inexpensive carbon and nitrogen substrates with high lacticacid production efficiency.
Journal ArticleDOI
Direct lactic acid fermentation: focus on simultaneous saccharification and lactic acid production.
TL;DR: Simultaneous saccharification and fermentation can replace the classical double step fermentation by the saccharization of starchy or cellulosic biomass and conversion to lactic acid concurrently by adding inoculum along with the substrate degrading enzymes.
Journal ArticleDOI
Growth studies of potentially probiotic lactic acid bacteria in cereal-based substrates
TL;DR: The overall growth kinetics of four potentially probiotic strains cultured in malt, barley and wheat media were investigated to identify the main factors influencing the growth and metabolic activity of each strain in association with the cereal substrate.
References
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Journal ArticleDOI
A medium for the cultivation of lactobacilli
TL;DR: An improved growth medium for lactobacilli is described, which supports good growth of lactOBacilli generally and also is particularly useful for a number of fastidious strains which grow only poorly in other general media.
Notice sur la loi que la population pursuit dans son accroissement
PF Verhulst,P. M. Verhulst +1 more
Journal ArticleDOI
Novel Method of Lactic Acid Production by Electrodialysis Fermentation
TL;DR: It was concluded that the continuation of fermentation activity was obtained, and the productivity was three times higher than in non-pH-controlled fermentation, on account of alleviating the lactic acid inhibitory effect by electrodialysis fermentation.
Journal ArticleDOI
Growth and acid production by Lactobacillus (L.) delbrueckii in a dialysis culture system
TL;DR: It has been shown that lactate inhibits growth after the log phase and that the maintenance of low lactate concentrations after this point permits higher specific growth rates and higher maximum cell concentrations.
PatentDOI
Direct fermentation of corn to L(+)-lactic acid by Rhizopus oryzae
TL;DR: Rhizopus oryzae NRRL 395 was found capable of fermenting ground corn directly to L(+)-lactic acid in the presence of calcium carbonate.
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