Efficient l ‐lactic acid production from purified sweet sorghum juice coupled with soybean hydrolysate as nitrogen source by Lactobacillus thermophilus A69 strain

2019 ◽  
Vol 94 (6) ◽  
pp. 1752-1759 ◽  
Author(s):  
Xue‐jiao Tian ◽  
Ai‐lian Jiang ◽  
Yan‐qin Mao ◽  
Bo Wu ◽  
Ming‐xiong He ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Nitrogen Source ◽  
Acid Production ◽  
Sweet Sorghum ◽  
Lactic Acid Production ◽  
Sweet Sorghum Juice

Efficient l-lactic acid production from sweet sorghum bagasse by open simultaneous saccharification and fermentation

RSC Advances ◽  
2016 ◽  
Vol 6 (42) ◽  
pp. 35771-35777 ◽  
Author(s):  
Y. Wang ◽  
M. Wang ◽  
D. Cai ◽  
B. Wang ◽  
Z. Wang ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Acid Production ◽  
Sweet Sorghum ◽  
Simultaneous Saccharification And Fermentation ◽  
Lactic Acid Production ◽  
Sweet Sorghum Bagasse ◽  
Sorghum Bagasse ◽  
Ssf Process ◽  
Simultaneous Saccharification

An open SSF process using B. coagulans LA1507 introduces an effective way to produce l-lactic acid from abundant SSB.

scholarly journals Production and Purification of l-lactic Acid in Lab and Pilot Scales Using Sweet Sorghum Juice

Fermentation ◽  
2019 ◽  
Vol 5 (2) ◽  
pp. 36 ◽  
Author(s):  
Agata Olszewska-Widdrat ◽  
Maria Alexandri ◽  
José Pablo López-Gómez ◽  
Roland Schneider ◽  
Michael Mandl ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Sweet Sorghum ◽  
Lactic Acid Production ◽  
Optical Purity ◽  
Bacillus Coagulans ◽  
Pilot Scale ◽  
Environmentally Benign ◽  
Downstream Process ◽  
Sweet Sorghum Juice ◽  
Ultra Filtration

Sweet sorghum juice (SSJ) was evaluated as fermentation substrate for the production of l-lactic acid. A thermophilic Bacillus coagulans isolate was selected for batch fermentations without the use of additional nutrients. The first batch of SSJ (Batch A) resulted on higher lactic acid concentration, yield and productivity with values of 78.75 g∙L−1, 0.78 g∙g−1 and 1.77 g∙L−1 h−1, respectively. Similar results were obtained when the process was transferred into the pilot scale (50 L), with corresponding values of 73 g∙L−1, 0.70 g∙g−1 and 1.47 g∙L−1 h−1. A complete downstream process scheme was developed in order to separate lactic acid from the fermentation components. Coarse and ultra-filtration were employed as preliminary separation steps. Mono- and bipolar electrodialysis, followed by chromatography and vacuum evaporation were subsequently carried out leading to a solution containing 905.8 g∙L−1 lactic acid, with an optical purity of 98.9%. The results of this study highlight the importance of the downstream process with respect to using SSJ for lactic acid production. The proposed downstream process constitutes a more environmentally benign approach to conventional precipitation methods.

scholarly journals Optimization of Lactic Acid Production from Pineapple By-Products and an Inexpensive Nitrogen Source Using Lactiplantibacillus plantarum strain 4O8

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Joel Romial Ngouénam ◽  
Pierre Marie Kaktcham ◽  
Chancel Hector Momo Kenfack ◽  
Edith Marius Foko Kouam ◽  
François Zambou Ngoufack
Keyword(s):  
Lactic Acid ◽  
Carbon Source ◽  
Nitrogen Source ◽  
Acid Production ◽  
Lactic Acid Production ◽  
Nitrogen Sources ◽  
Production Medium ◽  
Optimum Conditions ◽  
Pharmaceutical Industries ◽  
By Products

Lactic acid (LA) is used in food, cosmetic, chemical, and pharmaceutical industries and has recently attracted much attention in the production of biodegradable polymers. The expensive substances including carbon and nitrogen sources involved in its fermentative synthesis and the increasing market demand of LA have prompted scientists to look for inexpensive raw materials from which it can be produced. This research was aimed at determining the optimum conditions of lactic acid (LA) production from pineapple by-products and an inexpensive nitrogen source using Lactiplantibacillus plantarum strain 4O8. After collection and preparation of the carbon source (pineapple by-products) and nitrogen sources (by-products from fish, chicken, and beer brewing industries), they were used for the formulation of 4 different media in terms of nitrogen sources. Then, the proximate compositions of promising nitrogen sources were determined. This was followed by the screening of factors (temperature, carbon source, nitrogen source, MgSO4, MnSO4, FeSO4, KH2PO4, and KHPO4) influencing the production of LA using the definitive plan. Lastly, the optimization process was done using the central composite design. The highest LA productions ( 14.64 ± 0.05   g / l and 13.4 ± 0.02   g / l ) were obtained in production medium supplemented with chicken and fish by-products, respectively, making them the most promising sources of nitrogen. The proximate analysis of these nitrogen sources revealed that their protein contents were 83.00 ± 1.41 % DM and 74.00 ± 1.41 % DM for chicken by-products and fish by-products, respectively. Concerning the screening of factors, temperature, nitrogen source, and carbon source were the factors that showed a major impact on LA production in the production medium containing chicken by-products as nitrogen source. A pineapple by-product concentration of 141.75 g/l, a nitrogen source volume of 108.99 ml/l, and a temperature of 30.89°C were recorded as the optimum conditions for LA production. The optimization led to a 2.73-fold increase in LA production when compared with the production medium without nitrogen source. According to these results, chicken by-products are a promising and an inexpensive nitrogen source that can be an alternative to yeast extract in lactic acid production.

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