Chitosan production from hemicellulose hydrolysate of corn straw: impact of degradation products on Rhizopus oryzae growth and chitosan fermentation

Letters in Applied Microbiology
Chao TaiP Ouyang

Abstract

To examine the potential use of hemicellulose hydrolysate (HH) for the production of chitosan by Rhizopus oryzae and investigate the influence of contents in HH on mycelia growth and chitosan synthesis. Compared to xylose medium, HH enhanced mycelia growth, chitosan content and production of R. oryzae by 10.2, 64.5 and 82.1%, respectively. During sulfuric acid hydrolysis of corn straw, sugars (glucose, galactose, etc) and inhibitors (formic acid, acetic acid and furfural) were generated. Acetic acid (2.14 g l(-1)) and formic acid (0.83 g l(-1)) were stimulative, while furfural (0.55 g l(-1)) was inhibitory. Inhibitors, at different concentrations, increased the mycelia growth and chitosan production by 24.5-37.8 and 60.1-207.1%. HH of corn straw is a good source for chitosan production. Inhibitors in HH, at proper concentrations, can enhance chitosan production greatly. This work for the first time reported chitosan production from HH. Chitosan production can be greatly enhanced by cheap chemicals such as inhibitors in HH.

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Citations

Nov 12, 2013·International Journal of Biological Macromolecules·Mitra NaghdiKeikhosro Karimi
Sep 4, 2012·Biotechnology Advances·Qing XuJianping Wen
Mar 16, 2013·Critical Reviews in Microbiology·Surinder Kaur, Gurpreet Singh Dhillon
Oct 20, 2012·Critical Reviews in Biotechnology·Gurpreet Singh DhillonMausam Verma
Apr 19, 2019·Bioprocess and Biosystems Engineering·Jone Ibarruri, Igor Hernández
Aug 10, 2017·Applied Biochemistry and Biotechnology·Xuefeng WuXingjiang Li

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