期刊
BIOCHEMICAL ENGINEERING JOURNAL
卷 170, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.bej.2021.107982
关键词
Xylonic acid; Xylitol; Paraburkholderia sacchari; Xylose; Biorefinery; Hemicellulosic hydrolysates
资金
- iBB-Institute for Bioengineering and Biosciences from FCT [UIDB/04565/2020]
- Programa Operacional Regional de Lisboa 2020 [007317]
The study aimed to find operational conditions to promote xylonic acid production in bioreactors. Fed-batch assays using xylose achieved 150 g L-1 of xylonic acid, while sequential use of glucose and xylose resulted in xylonic acid concentrations of 370-390 g L-1, demonstrating competitive results.
Paraburkholderia sacchari revealed an outstanding ability to metabolize D-xylose to xylonic acid. The work described here aimed at finding the operational conditions to promote the production of xylonic acid in bioreactors. Fed-batch assays using xylose as the sole substrate for growth and production attained a xylonic acid concentration of 150 g L-1, corresponding to a productivity of 1.5 g L-1 h(-1) and a yield of xylonic acid over xylose (Y-P/S) of 0.63 g(XylAc)/g(Xyl). When glucose and xylose were used sequentially for growth and production respectively, xylonic acid concentrations in the range 370-390 g L-1 were observed, resulting in a volumetric productivity of 6.4-7.7 g L-1 h(-1) and a yield of 1.1 g(XylAc)/g(Xyl), matching the theoretical yield. These very competitive results were achieved using a simple process set-up.
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