Evaluation of cotton stalk hydrolysate for xylitol production

Date

2016-01-01

Author

Sapci, Burcu
AKPINAR, ÖZLEM
Bolukbasi, Ufuk
Yılmaz, Levent

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Cotton stalk is a widely distributed and abundant lignocellulosic waste found in Turkey. Because of its rich xylose content, it can be a promising source for the production of xylitol. Xylitol can be produced by chemical or biotechnological methods. Because the biotechnological method is a simple process with great substrate specificity and low energy requirements, it is more of an economic alternative for the xylitol production. This study aimed to use cotton stalk for the production of xylitol with Candida tropicalis Kuen 1022. For this purpose, the combined effects of different oxygen concentration, inoculum level and substrate concentration were investigated to obtain high xylitol yield and volumetric xylitol production rate. Candida tropicalis Kuen 1022 afforded different concentrations of xylitol depending on xylose concentration, inoculum level, and oxygen concentration. The optimum xylose, yeast concentration, and airflow rate for cotton stalk hydrolysate were found as 10.41gL(-1), 0.99gL(-1), and 1.02vvm, respectively, and under these conditions, xylitol yield and volumetric xylitol production rate were obtained as 36% and 0.06gL(-1)hr(-1), respectively. The results of this study show that cotton stalk can serve as a potential renewable source for the production of xylitol.

Subject Keywords

Xylose, Xylitol, Fermentation optimization, Biomass utilization, Bioconversion

URI

https://hdl.handle.net/11511/42837

Journal

PREPARATIVE BIOCHEMISTRY & BIOTECHNOLOGY

DOI

https://doi.org/10.1080/10826068.2015.1084511

Collections

Department of Chemical Engineering, Article

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Citation Formats

B. Sapci, Ö. AKPINAR, U. Bolukbasi, and L. Yılmaz, “Evaluation of cotton stalk hydrolysate for xylitol production,” PREPARATIVE BIOCHEMISTRY & BIOTECHNOLOGY, pp. 474–482, 2016, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/42837.