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Kinetic study and model of fermentation parameters affected growth and xylitol production in bioreactor by Kluyveromyces marxianus ATCC 36,907.

Authors :
Manaf, Shareena Fairuz Abdul
Luthfi, Abdullah Amru Indera
Tan, Jian Ping
Abdul, Peer Mohamed
Jamali, Nur Syakina
Source :
Biomass Conversion & Biorefinery; Jun2023, Vol. 13 Issue 8, p7247-7263, 17p
Publication Year :
2023

Abstract

Optimum conditions for xylitol production from xylose based on the reliable kinetic models of the fermentative performance are important to design lignocellulosic xylitol production. The model was validated by comparing the simulation results with experimental data in batch culture of Kluyveromyces marxianus ATCC 36,907 under various concentrations of initial substrate (36 to 122 g/L) and agitation speed of the impeller (200 to 500 rpm) in a 3.6-L bioreactor. The model suggested that the kinetics of K. marxianus ATCC 36,907 using a modified Monod equation was regulated by the effects of xylose concentrations and oxygen levels during the fermentation. Xylitol production appeared favorable with maximum yield of 0.43 g/g corresponded to k<subscript>L</subscript>a value of 29.9 h<superscript>−1</superscript> with low microbial growth. Sensitivity analysis on the obtained model parameters showed that the maximum specific growth rates (µ<subscript>max</subscript>) and substrate consumption constant (K<subscript>S</subscript>) are the most influential model parameters for xylitol production. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
21906815
Volume :
13
Issue :
8
Database :
Complementary Index
Journal :
Biomass Conversion & Biorefinery
Publication Type :
Academic Journal
Accession number :
164107737
Full Text :
https://doi.org/10.1007/s13399-022-02976-2