Biosynthesis of xanthan gum from residual glycerin from biodiesel production for drilling fluids

Brandão, Lillian B; López, Jorge A.; Assis, Denilson J.; Echevarria, E.; Druzian, Janice Izabel

doi:10.1186/1753-6561-8-s4-p187

Cited by 3 publications

(2 citation statements)

References 4 publications

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“…One of economically and environmentally acceptable solution is potential use of crude glycerol as a raw material in biotechnological production [5,6]. Several studies indicate that certain strains of bacteria of the genus Xanthomonas possess the ability to biosynthesize xanthan on a medium containing crude glycerol as the only carbon source [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

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Screening of Local Wild Xanthomonas Species for Xanthan Production on Crude Glycerol-based Medium

Zahović

Dodić²,

Grahovac³

et al. 2022

Period. Polytech. Chem. Eng.

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In this study, the effect of cultivation time on xanthan biosynthesis by different Xanthomonas campestris and Xanthomonas euvesicatoria strains, isolated from crucifers and pepper leaves, respectively, was examined. Xanthan was produced by submerged cultivation on crude glycerol-based medium at a laboratory level under aerobic conditions at 30 °C and 150 rpm for 168 h and 240 h. Bioprocess efficacy was estimated based on the xanthan concentration in media at the end of bioprocess and its average molecular weight. According to the obtained results, Xanthomonas strains have statistically significant effect on xanthan concentration in cultivation media when biosynthesis is performed by X. euvesicatoria strains, and cultivation time has significant effect on this parameter only when bioprocess is performed by X.campestris strains. The combination of Xanthomonas strains and cultivation time has a statistically significant effect on xanthan concentration in medium for both groups of isolates. The obtained results show that all applied Xanthomonas strains and cultivation time as well as their combination have statistically significant effect on average molecular weight of xanthan produced in applied experimental conditions. It is found that X. euvesicatoria strains produce higher amount of xanthan in a shorter period of time (168 h) when compared to the X.campestris strains. Xanthan of higher average molecular weight was produced when cultivation of both groups of isolates was performed for 240 h in applied experimental conditions. Results obtained in this research suggest that X. euvesicatoria strains have the greatest potential for application in biotechnological production of xanthan on crude glycerol-based medium.

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Section: Introductionmentioning

confidence: 99%

“…Xanthan presents one of the most widely examined microbial exopolysaccharides which is produced by metabolic activity of bacteria of the genus Xanthomonas [7].…”

Section: Introductionmentioning

confidence: 99%

Screening of Local Wild Xanthomonas Species for Xanthan Production on Crude Glycerol-based Medium

Zahović

Dodić²,

Grahovac³

et al. 2022

Period. Polytech. Chem. Eng.

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Activation of glycerol metabolism in Xanthomonas campestris by adaptive evolution to produce a high-transparency and low-viscosity xanthan gum from glycerol

Wang

Zhu

et al. 2016

Bioresource Technology

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High production of xanthan gum by a glycerol-tolerant strain Xanthomonas campestris WXLB-006

Wang

Gao

et al. 2017

Preparative Biochemistry & Biotechnology

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The superior properties of xanthan gum make it an industrial aginomoto used in many industries, especially in oil recovery. In the present work, xanthan production from glycerol by a mutant strain Xanthomonas campestris WXLB-006 reached as high as 17.8 g/L in flask culture. With the adoption of pH control, varied aeration and agitation, and varied glycerol feeding strategy, xanthan production reached 33.9 g/L in a 7-L fermenter and fermentation time decreased to 60 hr. Instead of difficultly and costly purifying glycerol, this research provides a very good case for glycerol utilization. At the same time, this is the first report on a high glycerol-tolerant strain for microbial polysaccharide production and 33.9 g/L is the highest production of xanthan gum produced from glycerol so far.

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Biosynthesis of xanthan gum from residual glycerin from biodiesel production for drilling fluids

Cited by 3 publications

References 4 publications

Screening of Local Wild Xanthomonas Species for Xanthan Production on Crude Glycerol-based Medium

Screening of Local Wild Xanthomonas Species for Xanthan Production on Crude Glycerol-based Medium

Activation of glycerol metabolism in Xanthomonas campestris by adaptive evolution to produce a high-transparency and low-viscosity xanthan gum from glycerol

High production of xanthan gum by a glycerol-tolerant strain Xanthomonas campestris WXLB-006

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