title: Utilization of corncob acid hydrolysate for bacterial cellulose production by Gluconacetobacter xylinus.
abstract: In this study, corncob acid hydrolysate was used as a substrate for bacterial cellulose (BC) production by Gluconacetobacter xylinus. After 2 weeks' static fermentation, a BC yield of 4 g/L could be obtained. Both effects of medium composition and fermentation condition on the BC production were evaluated. Most extra substrates (carbon and nitrogen sources) except mannitol, butyric acid, and levulinic acid showed no effect on the improvement of BC yield. Fermentation condition including fermentation mode, inoculation concentration, and initial pH showed certain influence on the BC yield and thus should be well controlled. The analysis by field emission scanning electron microscope (FE-SEM), Fourier transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD) showed that the BC sample had obvious nano-network structure, clear functional groups that were found in cellulose, and relatively high crystallinity and crystallinity index value. Moreover, the BC sample had great water-holding capacity. Overall, corncob acid hydrolysate could be one promising substrate for BC production.
authors.affiliation: Key Laboratory of Renewable Energy, Chinese Academy of Sciences, Guangzhou, 510640, People's Republic of China.
authors.forename: Chao
authors.initials: C
authors.lastname: Huang
authors.forename: Xiao-Yan
authors.initials: XY
authors.lastname: Yang
authors.forename: Lian
authors.initials: L
authors.lastname: Xiong
authors.forename: Hai-Jun
authors.initials: HJ
authors.lastname: Guo
authors.forename: Jun
authors.initials: J
authors.lastname: Luo
authors.forename: Bo
authors.initials: B
authors.lastname: Wang
authors.forename: Hai-Rong
authors.initials: HR
authors.lastname: Zhang
authors.forename: Xiao-Qing
authors.initials: XQ
authors.lastname: Lin
authors.forename: Xin-De
authors.initials: XD
authors.lastname: Chen
mesh_terms: D000143:Acids / Q000494:pharmacology*; D002482:Cellulose / Q000096:biosynthesis* / Q000648:ultrastructure; D003470:Culture Media / Q000494:pharmacology; D005285:Fermentation / Q000187:drug effects; D041822:Gluconacetobacter xylinus / Q000187:drug effects / Q000378:metabolism*; D006863:Hydrogen-Ion Concentration; D006868:Hydrolysis; D017550:Spectroscopy, Fourier Transform Infrared; D013997:Time Factors; D014867:Water; D014961:X-Ray Diffraction; D003313:Zea mays / Q000737:chemistry* / Q000187:drug effects
chemical_list: D000143:Acids; D003470:Culture Media; D014867:Water; D002482:Cellulose