Fungal chitosan production using xylose rich of corn stover prehydrolysate by Rhizopus oryzae

Autor: Yimin Fan, Xin Li, Qiang Yong, Chenhuan Lai, Jia Ouyang, Yang Lei
Jazyk: angličtina
Rok vydání: 2017
Předmět:
Zdroj: Biotechnology & Biotechnological Equipment, Vol 31, Iss 6, Pp 1160-1166 (2017)
ISSN: 1314-3530
1310-2818
Popis: Xylose rich of lignocellulosic prehydrolysate could be used for fungal chitosan production effectively by Rhizopus oryzae. When 15 g/L xylose was used as carbon source for R. oryzae AS 3.819 fermentation, almost all of the xylose was consumed for cell growth (4.33 g/L of biomass) and the chitosan extraction yield was 0.11 g/g biomass. Corn stover prehydrolysate by dilute acid-assisted steam explosion pretreatment that contained 30 g/L xylose and 10 g/L glucose was fermented by R. oryzae AS 3.819 for 72 h, the biomass and the chitosan extraction yield were 10.96 g/L and 0.09 g/g biomass. The degree of deacetylation of the fungal chitosan derived from corn stover prehydrolysate (91.27%) was higher than that of the commercial chitosan extracted from natural shellfish exoskeleton (87.25%), and the viscosity of the fungal chitosan derived from corn stover prehydrolysate (2.67 mPa⋅s) had a large decrease compared to the commercial chitosan (22.25 mPa⋅s). The functional groups and thermostability of the fungal chitosan were proofed by Infrared (IR) spectra and Derivative thermogravimetric (DTG), respectively.
Databáze: OpenAIRE
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