Liquid effluents of bioethanol production from various raw materials as media for xanthan biosynthesis

Abstract

The purpose of this paper is to examine the viability of using liquid effluents of bioethanol production from molasses, corn and a mixture of waste starch raw materials as a basis of the cultivation medium for the biotechnological production of xanthan using Xanthomonas campestris ATCC 13951. The dynamics of basic macronutrient consumption was used to monitor the course of xanthan biosynthesis, whereas the possibility of biosynthesis was confirmed on the basis of the rheological parameters of the cultivation broth. The success of biosynthesis was assessed according to the values of xanthan content and conversion to xanthan, which ranged from 8.78 g/L to 11.16 g/L and from 58.13 % to 73.24 % respectively when using the cultivation media based on liquid effluents of bioethanol production from different raw materials.

Keywords

• bioethanol
• bioprocess
• liquid effluents
• xanthan