Fed-batch fermentation for rapid production of xanthan by Xanthomonas campestris.

Shamala, T. R. and Prasad, M. S. (2001) Fed-batch fermentation for rapid production of xanthan by Xanthomonas campestris. Food Biotechnology, 15 (3). 169-177, 14 ref..

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Abstract

Inoculum size and N source were optimized for rapid production of xanthan by Xanthomonas campestris using fed-batch fermentation. N sources used were KNO3, NaNO3, NH4NO3, NH4Cl, (NH4)2SO4, urea, peptone and corn steep liquor. The fermentation period for production of xanthan by X. campestris decreased from 72 to 48 h using 30% (v/v) inoculum instead of the usual 10% level. Among the N sources tested in the medium having a C/N ratio of 28, the highest concn. of xanthan (1.9% (w/v)) with a viscosity of 10 000 cP was obtained with the KNO3 medium. Intermittent harvests operated for 3 cycles of 48 h each, using 30% inoculum, resulted in xanthan broth of high viscosity (9000 cP) with a concn. of 1.9% and a yield of 68% (w/w). It is concluded that KNO3 is a well suited N source for the medium used for rapid production of xanthan.

Item Type:	Article
Uncontrolled Keywords:	FERMENTATION-PRODUCTS; NITROGEN-; XANTHAN-; XANTHOMONAS-; N-; XANTHOMONAS-CAMPESTRIS
Subjects:	600 Technology > 05 Chemical engineering > 04 Fermentation Technology 500 Natural Sciences and Mathematics > 07 Life Sciences > 04 Microbiology
Divisions:	Food Microbiology
Depositing User:	Somashekar K.S
Date Deposited:	14 Jun 2011 04:27
Last Modified:	14 Jun 2011 04:27
URI:	http://ir.cftri.res.in/id/eprint/7619

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