Lactic acid production by Carnobacterium sp. isolated from a maritime Antarctic lake using eucalyptus enzymatic hydrolysate

Camesasca, Laura; Mattos, Juan Andrés de; Vila, Eugenia; Cebreiros, Florencia; Lareo, Claudia

doi:10.1016/j.btre.2021.e00643

Cited by 9 publications

(3 citation statements)

References 56 publications

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“…Lactic acid (LA) is an essential chemical compound used as a flavour, acidifier, and preservative in the food industry. The pharmaceutical, cosmetic and polymers industries use lactic acid as a raw material to develop commercial products [ 1 ]. Lactic acid is produced in two ways: fermentation (biotechnological process) and chemical synthesis.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Nanofiltration Membranes for Pure Lactic Acid Permeability

et al. 2022

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Lactic acid (LA) is an organic acid produced by fermentation or chemical synthesis. It plays a crucial role in the pharmaceutical, food and plastic industries. In the fermentation of, for example, grass silage, LA and different compounds are produced. To purify lactic acid, researchers have tried to investigate membrane technology to achieve a high yield of lactic acid permeance. This study tested four commercially available nanofiltration membranes (NF270, MPF-36, Toray NF, and Alfa Laval NF). Nanofiltration experiments were performed to investigate the rejection levels of lactic acid from a binary solution by using distinct molecular weight cut off membranes. All of the experiments were conducted with a lab-scale cross-flow membrane unit. Different operating conditions (pH, temperature) were studied for each membrane; the optimal process condition was found at 25 °C and pH 2.8. With higher temperatures and pH, an increase in LA rejection was observed. The MPF-36 membrane shows the lowest lactic acid rejection yield of 7%, while NF270 has the highest rejection yield of 71% at 25 °C and pH 2.8. These results will be helpful in the future to understand both the interaction of lactic acid permeance through nanofiltration membranes and process scale-up.

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Section: Introductionmentioning

confidence: 99%

Evaluation of Nanofiltration Membranes for Pure Lactic Acid Permeability

et al. 2022

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“…Recently, lignocellulosic biomasses have been used as a low-cost alternative. Lactic acid fermentation from these materials involves a previous hydrolysis process where the sugars are released from the cell wall of the biomass [9].…”

Section: Introductionmentioning

confidence: 99%

Effect of Several Pretreatments on the Lactic Acid Production from Exhausted Sugar Beet Pulp

Marzo

Díaz

Caro

et al. 2021

Foods

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Exhausted sugar beet pulp (ESBP), a by-product of the sugar industry, has been used as a substrate to produce lactic acid (LA). Due to the fact that ESBP contains a high percentage of pectin and hemicellulose, different pretreatments were studied to solubilize them and to facilitate the access to cellulose in the subsequent enzymatic hydrolysis. Several pretreatments were studied, specifically biological, oxidant with alkaline hydrogen peroxide (AHP), and thermochemical with acid (0.25, 0.5, or 1% w/v of H2SO4). Pretreated ESBP was enzymatically hydrolysed and fermented with the strain Lactiplantibacillus plantarum for LA production. The hydrolysis was carried out with the commercial enzymes Celluclast®, pectinase, and xylanase, for 48 h. After that, the hydrolysate was supplemented with yeast extract and calcium carbonate before the bacteria inoculation. Results showed that all the pretreatments caused a modification of the fibre composition of ESBP. In most cases, the cellulose content increased, rising from 25% to 68% when ESBP was pretreated thermochemically at 1% w/v H2SO4. The production of LA was enhanced when ESBP was pretreated thermochemically. However, it was reduced when biological and AHP pretreatments were applied. In conclusion, thermochemical pretreatment with 1% w/v H2SO4 had a positive impact on the production of LA, increasing its concentration from 27 g/L to 50 g/L.

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“…Another advantage of the production of lactic acid by fermentation is the possibility of using agro-industrial residues, such as eucalyptus enzymatic hydrolysate [8], orange peel waste hydrolysate [9], microalgae [10], waste cooking oil glycerol [11], cassava bagasse [12] molasses [13,14], food waste [15], hydrolyzed cheese whey [3], brown rice [16],…”

Section: Introductionmentioning

confidence: 99%

Production of L (+) Lactic Acid by Lactobacillus casei Ke11: Fed Batch Fermentation Strategies

et al. 2021

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Lactic acid and its derivatives are widely used in pharmaceutical, leather, textile and food industries. However, until now there have been few systematic reports on fed-batch fermentation for efficient production and high concentration of l-lactic acid by lactic acid bacteria. This study describes the obtainment of L (+) lactic acid from sucrose using the Lactobacillus casei Ke11 strain through different feeding strategies using an accessible pH neutralizer such as CaCO3. The exponential feeding strategy can increase lactic acid production and productivity (175.84 g/L and 3.74 g/L/h, respectively) with a 95% yield, avoiding inhibition by high initial substrate concentration and, combined with the selected agent controller, avoids the cellular stress that could be caused by the high osmotic pressure of the culture media. The purification of the acid using charcoal and celite, followed by the use of a cation exchange column proved to be highly efficient, allowing a high yield of lactic acid, high removal of sugars and proteins. The described process shows great potential for the production of lactic acid, as well as the simple, efficient and low-cost purification method. This way, this work is useful to the large-scale fermentation of L. casei Ke11 for production of l-lactic acid.

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Lactic acid production by Carnobacterium sp. isolated from a maritime Antarctic lake using eucalyptus enzymatic hydrolysate

Cited by 9 publications

References 56 publications

Evaluation of Nanofiltration Membranes for Pure Lactic Acid Permeability

Evaluation of Nanofiltration Membranes for Pure Lactic Acid Permeability

Effect of Several Pretreatments on the Lactic Acid Production from Exhausted Sugar Beet Pulp

Production of L (+) Lactic Acid by Lactobacillus casei Ke11: Fed Batch Fermentation Strategies

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