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Preparative biochemistry & biotechnology

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


PMID 28267413

Abstract

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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