Journal
BIORESOURCE TECHNOLOGY
Volume 225, Issue -, Pages 9-16Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2016.11.016
Keywords
Yarrowia lipolytica; Fibrous bed bioreactor; Glycerol; Succinic acid
Funding
- Research Grants Council of the Hong Kong Special Administrative Region, China [9042001]
- City University of Hong Kong [7004466]
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In this study, in situ fibrous bed bioreactor (isFBB) was developed at the first time for efficient succinic acid (SA) production by Yarrowia lipolytica. After optimization, SA titer, productivity and yield of 51.9 g/L, 1.46 g/L/h and 0.42 g/g were obtained respectively via isFBB fermentation under conditions of 750 cm(2) cotton towel, 120 g/L initial glycerol and 3 L/min aeration rate. By fed batch strategy, SA titer raised up to 198.2 g/L was achieved, which was the highest value ever reported. In operation stability study, SA productivity showed no obvious decrease after 12 repeated batches of 460 h fermentation, and cell viability even recovered within two repeated batches after intentional interruption. This study successfully attained a highly efficient and stable isFBB for enhanced SA production by Y. lipolytica. (C) 2016 Elsevier Ltd. All rights reserved.
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