scholarly journals Lactic acid production from submerged fermentation of broken rice using undefined mixed culture

2017 ◽  
Vol 33 (4) ◽  
Author(s):  
Luiza Varela Nunes ◽  
Fabiane Fernanda de Barros Correa ◽  
Pedro de Oliva Neto ◽  
Cassia Roberta Malacrida Mayer ◽  
Bruna Escaramboni ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Mixed Culture ◽  
Submerged Fermentation ◽  
Acid Production ◽  
Lactic Acid Production ◽  
Broken Rice

scholarly journals Kitchen Refuse: a Novel Substrate for L (+) -Lactic Acid Production by Rhizopus oryzae in Submerged Fermentation

2005 ◽  
Vol 6 (1) ◽  
pp. 45-52 ◽  
Author(s):  
Suthasinee PRANEETRATTANANON ◽  
Minato WAKISAKA ◽  
Yoshihito SHIRAI ◽  
Vichien KITPREECHAVANICH
Keyword(s):  
Lactic Acid ◽  
Submerged Fermentation ◽  
Acid Production ◽  
Rhizopus Oryzae ◽  
Lactic Acid Production

scholarly journals Modification of the Luedeking and Piret Model with a Delay Time Parameter for Biotechnological Lactic Acid Production

2021 ◽  
Author(s):  
María Carla Groff ◽  
Gustavo Scaglia ◽  
Oscar A. Ortiz ◽  
Sandra E. Noriega
Keyword(s):  
Lactic Acid ◽  
Time Delay ◽  
Submerged Fermentation ◽  
Acid Production ◽  
Lactic Acid Production ◽  
Time Lag ◽  
Product Formation ◽  
Delay Model ◽  
Growth Environment ◽  
Experimental Kinetics

Abstract Objectives To obtain a mathematical model that adequately describes the time lag between biomass generation and lactic acid production of lactic fermentations. Methods Seven experimental kinetics from other research works were studied to validate our proposal: four studies of Fungal Submerged Fermentation and three cases of Bacterial Submerged Fermentation, including the data recollected by Luedeking and Piret. Results We introduce a modification to the Luedeking and Piret model that consist in the introduction of a time delay parameter in the model, this parameter would account for the lag time that exists between the production of biomass and lactic acid. It is possible to determine this time delay in a simple way by approximating the biomass and product formation considering that they behave as a first order plus dead time system. The duration of this phenomenon, which is not described with the classical Luedeking and Piret model, is a function of microorganism physiology (ease of biomass growth), environment (nutrients) and type of inoculum. Conclusion The Luedeking and Piret with delay model applications reveal an increase of the R2 in all cases, evidencing the quality of fit and the simplicity of the method proposed. These model would improve the accuracy of bioprocess scaling up.

scholarly journals Production of L-lactic acid from Cassava peel wastes using single and mixed cultures of Rhizopus oligosporus and Lactobacillus plantarum

2014 ◽  
Vol 20 (4) ◽  
pp. 457-461 ◽  
Author(s):  
Ogbonnaya Nwokoro
Keyword(s):  
Lactic Acid ◽  
Mixed Culture ◽  
Lactobacillus Plantarum ◽  
Acid Production ◽  
Lactic Acid Production ◽  
Reducing Sugar ◽  
Rhizopus Oligosporus ◽  
Mixed Culture Fermentation ◽  
Cassava Peels ◽  
Reducing Sugar Concentration

Production of L-lactic acid using cultures of Rhizopus oligosporus and Lactobacillus plantarum was investigated. Cassava peels were hydrolyzed by boiling for 1 h in either NaOH or HCl solutions followed by neutralization to a pH of 6.2. Reducing sugar produced from the hydrolysates increased with increasing concentrations of alkali or acid. Samples hydrolyzed with HCl produced a maximum reducing sugar concentration of 402 mg/g substrate while alkali hydrolyzed samples produced a maximum reducing sugar concentration of 213 mg/g substrate. Hydrolysates were amended with 0.5% ammonium sulphate solution and inoculated with either single or mixed cultures of Rhizopus oligosporus and Lactobacillus plantarum and incubated for 48 h for lactic acid production. The best lactic acid production of 50.2 g/100g substrate was observed in a mixed culture fermentation of acid hydrolyzed peels. Mixed culture fermentation of alkali hydrolyzed peels produced a maximum lactic acid concentration of 36.4 g/100g substrate. Un hydrolyzed cassava peels inoculated with a mixed culture of the microorganisms produced only 4.6 g/100g substrate. This work reports an efficient use of cassava peels for bio-product formation through microbial fermentation.

scholarly journals Lactic Acid Production in a Mixed-Culture Biofilm Reactor †

1993 ◽  
Vol 59 (1) ◽  
pp. 203-207 ◽  
Author(s):  
Ali Demirci ◽  
Anthony L. Pometto ◽  
Kenneth E. Johnson
Keyword(s):  
Lactic Acid ◽  
Mixed Culture ◽  
Acid Production ◽  
Lactic Acid Production ◽  
Biofilm Reactor
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