Lactic acid and xanthan fermentations on an alternative potato residues media – Carbon source costs

Bilanovic, Dragoljub; Chang, Fu-Hsian; Isobaev, Pulat; Welle, Patrick G.

doi:10.1016/j.biombioe.2011.03.001

Cited by 17 publications

(9 citation statements)

References 27 publications

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“…It can be concluded that an optimal value of C/N ratio varies significantly and thus could not be considered as a crucial parameter for the evaluation of media. Assuming that the sugars from molasses contain on average 40% of C, the value of C/N ratio in the stillage/molasses media was in the range 13 to 23 and corresponded well with the reported values …”

Section: Resultssupporting

confidence: 87%

“…The nitrogen content in the stillage was 0.18% and originated from residual yeast biomass, but also from the substrate used for ethanol fermentation. Compared with nitrogen content of a standard media for LA fermentation, reported in the range from 0.01 to 0.21%, it can be considered that the stillage is an adequate nitrogen source for fastidious microorganisms like LAB. On the other hand, nitrogen content in molasses that can be assimilated is relatively low, since a large part of the nitrogen represents betaine .…”

Section: Resultsmentioning

confidence: 99%

“…sufficient C/N ratio for LA fermentation was in the range from 27 to 35. According to Bilanovic et al . the C/N ratio of standard media for LA fermentation could be in the wide range from 5.71 to 680.…”

Section: Resultsmentioning

confidence: 99%

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Lactic acid production on a combined distillery stillage and sugar beet molasses substrate

Mladenović

Djukić‐Vuković

Kocić‐Tanackov

et al. 2015

J of Chemical Tech & Biotech

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BACKGROUND: Utilization of wastes and industrial by-products for production of valuable bio-based chemicals has economic and environmental advantages. The aim of this study was to investigate utilization of two industrial by-products, distillery stillage and sugar beet molasses combined as a substrate for lactic acid and biomass production. A selection of the most appropriate lactic acid bacteria that could effectively utilize this waste substrate was performed. In addition, the effect of initial sugar concentration on lactic acid production and growth of lactic acid bacteria on the combined waste substrate was evaluated. RESULTS:Lactobacillus paracasei NRRL B-4564 was selected as the most promising for lactic acid production on distillery stillage and sugar beet molasses. The highest lactic acid productivity of 1.42 g L −1 h −1 and yield of 0.91 g g −1 were achieved on stillage/molasses media at initial sugar concentration of 56.74 g L −1 . The highest number of L. paracasei cells at 5.3 × 10 9 CFU mL −1 was achieved at initial sugar concentration of 78.22 g L −1 . CONCLUSION: Combined distillery stillage and sugar beet molasses could provide valuable nutrients for growth of fastidious lactic acid bacteria and enable efficient lactic acid production, while processing industrial waste in this way has great environmental relevance.

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Section: Resultssupporting

confidence: 87%

Section: Resultsmentioning

confidence: 99%

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Lactic acid production on a combined distillery stillage and sugar beet molasses substrate

Mladenović

Djukić‐Vuković

Kocić‐Tanackov

et al. 2015

J of Chemical Tech & Biotech

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“…Research studies on the use of potato residues as feedstock for LA fermentation have been published recently [16][17][18][19][20][21] . They address the production of LA with different microbial strains and at different working conditions.…”

mentioning

confidence: 99%

“…In particular, Liang et al [16][17] describe the production of LA with a mixed undefined microbial inoculum in batch and sequencing batch culture. The study conducted by Bilanovic et al 18 evaluates the benefits of using potato residues as an alternative carbon source for LA production with Lactobacillus spp.. In another work, up to 10 g L -1 LA were produced from sweet potato residues with Lactobacillus spp.…”

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confidence: 99%

Valorization of Potato-processing Residues for the Production of Lactic Acid

Smerilli¹

2016

Chem.Biochem.Eng.Q.

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Every year large amounts of residues accumulate from potato processing. The aim of this study is to develop a process to valorize these residues as feedstock for lactic acid fermentation in a way that is suitable for industrial production. An enzymatic hydrolysate obtained from potato residues (46 % w/w dry mass starch) was used as a substrate in batch and fed-batch fermentations with Lactobacillus casei. Supplementation of yeast extract (3 g L ) was required to improve productivities. Despite the inhibitory effect exerted by phenolic compounds in the medium, reasonably high lactic acid concentrations (102 g L -1 ) and yields (92 %) were obtained, with 92 % (L-isomer) optical purity. It was clearly demonstrated that potato residues are suitable as feedstock for large-scale production of technical grade lactic acid and that the developed process is promising for large-scale biorefinery applications.

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Sources and methods of manufacturing xanthan by fermentation of various carbon sources

Dey,

Chatterji

2023

Biotechnology Progress

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Xanthan gum, an anionic polysaccharide with an exceptionally high molecular weight, is produced by the bacterium Xanthomonas sp. It is a versatile compound that has been utilized in various industries for decades. Xanthan gum was the second exopolysaccharide to be commercially produced, following dextran. In 1969, the US Food and Drug Administration (FDA) approved xanthan gum for use in the food and pharmaceutical industries. The food industry values xanthan gum for its exceptional rheological properties, which make it a popular thickening agent in many products. Meanwhile, the cosmetics industry capitalizes on xanthan gum's ability to form stable emulsions. The industrial production process of xanthan gum involves fermenting Xanthomonas in a medium that contains glucose, sucrose, starch, etc. as a substrate and other necessary nutrients to facilitate growth. This is achieved through batch fermentation under optimal conditions. However, the increasing costs of glucose in recent years have made the production of xanthan economically unviable. Therefore, many researchers have investigated alternative, cost‐effective substrates for xanthan production, using various modified and unmodified raw materials. The objective of this analysis is to investigate how utilizing different raw materials can improve the cost‐efficient production of xanthan gum.

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Lactic acid and xanthan fermentations on an alternative potato residues media – Carbon source costs

Cited by 17 publications

References 27 publications

Lactic acid production on a combined distillery stillage and sugar beet molasses substrate

Lactic acid production on a combined distillery stillage and sugar beet molasses substrate

Valorization of Potato-processing Residues for the Production of Lactic Acid

Sources and methods of manufacturing xanthan by fermentation of various carbon sources

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