Utilization of sugar molasses for economical l(+)-lactic acid production by batch fermentation of Enterococcus faecalis

Kinetic modeling of biomass and lactic acid production by Enterococcus faecalis SLT13 have been developed during batch culture in M17 and Hydrolyzed Cheese Whey (HCW) in 2 L and 20 L bioreactors. The specific growth rate μmax was higher in 20 L bioreactor (1.09 h−1); however, the maximum specific lactic acid production rate qpmax and maximum specific sugar utilization rate qsmax were higher in 2 L bioreactor. Biomass and sugar utilization were affected by lactic acid inhibition in HCW. No effects of substrate inhibition have been observed. Substrate limitation of biomass has been observed on HCW in 20 L bioreactor; the substrate limitation constant for biomass Ksx was 4.229 g/L. Substrate limitation of sugar consumption has been observed on M17 in 2 L bioreactor; the substrate limitation constant for sugar consumption Kss was 2.73 g/L. Compared to experimental data, the model provided good predictions for biomass, sugar consumption, and lactic acid production.

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Efficient biorefinery process for lactic acid production from date wastes with alleviating substrate inhibition effect using thermo-alkaline repeated batch fermentation

Biomass Conversion and Biorefinery ◽

10.1007/s13399-020-01043-y ◽

2020 ◽

Author(s):

Mahmoud Ali Gaber ◽

Mohamed Ali Abdel-Rahman ◽

Saad El-Din Hassan ◽

Mohamed Salah Azab

Keyword(s):

Lactic Acid ◽

Acid Production ◽

Batch Fermentation ◽

Lactic Acid Production ◽

Substrate Inhibition ◽

Inhibition Effect ◽

Repeated Batch Fermentation ◽

Repeated Batch

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Repeated-batch fermentation in biofilm reactors with plastic-composite supports for lactic acid production

Applied Microbiology and Biotechnology ◽

10.1007/s002530050455 ◽

1995 ◽

Vol 43 (4) ◽

pp. 585-589 ◽

Cited By ~ 1

Author(s):

A. Demirci ◽

A. L. Pometto III

Keyword(s):

Lactic Acid ◽

Acid Production ◽

Batch Fermentation ◽

Lactic Acid Production ◽

Biofilm Reactors ◽

Plastic Composite ◽

Repeated Batch Fermentation ◽

Repeated Batch

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Kinetics of d-lactic acid production by Sporolactobacillus sp. strain CASD using repeated batch fermentation

Bioresource Technology ◽

10.1016/j.biortech.2010.03.069 ◽

2010 ◽

Vol 101 (16) ◽

pp. 6499-6505 ◽

Cited By ~ 54

Author(s):

Bo Zhao ◽

Limin Wang ◽

Fengsong Li ◽

Dongliang Hua ◽

Cuiqing Ma ◽

...

Keyword(s):

Lactic Acid ◽

Acid Production ◽

Batch Fermentation ◽

Lactic Acid Production ◽

Repeated Batch Fermentation ◽

Repeated Batch ◽

Kinetics Of

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Production of lactic acid by Enterococcus faecalis on waste glycerol from biodiesel production

Chemical Industry and Chemical Engineering Quarterly ◽

10.2298/ciceq191010033c ◽

2020 ◽

Vol 26 (2) ◽

pp. 151-156

Author(s):

Jovan Ciric ◽

Natasa Jokovic ◽

Slavica Ilic ◽

Sandra Konstantinovic ◽

Dragisa Savic ◽

...

Keyword(s):

Lactic Acid ◽

Carbon Source ◽

Enterococcus Faecalis ◽

Acid Production ◽

Lactic Acid Production ◽

Raw Material ◽

Biodiesel Production ◽

Waste Glycerol ◽

Pure Glycerol ◽

Microbial Utilization

Waste glycerol from biodiesel production is a valuable raw material that has been used to produce valuable microbial metabolites. In this work, the possibility of microbial utilization of waste glycerol obtained as a by-product in biodiesel production from sunflower and rapeseed oil by the lactic acid bacterium Enterococcus faecalis MK3-10A on a laboratory level was studied. For comparison, pure glycerol and glucose were used as carbon sources. The kinetics of the microbial biomass growth, the carbon source utilization, and the lactic acid production were monitored. The bacterium E. faecalis MK3-10A better grew in the media with glucose or pure glycerol as a carbon source, but the lactic acid production rate was the highest (14.6 mg/(ml/day)) in the medium with waste glycerol from the sunflower oil-based biodiesel production. Therefore, this waste glycerol might be a promising carbon source for lactic acidbacteria cultivation and lactic acid production.

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