|
1
|
Sun L, Wang DM, Sun WJ, Cui FJ, Gong JS, Zhang XM, Shi JS, Xu ZH. Two-Stage Semi-Continuous 2-Keto-Gluconic Acid (2KGA) Production by Pseudomonas plecoglossicida JUIM01 From Rice Starch Hydrolyzate. Front Bioeng Biotechnol 2020; 8:120. [PMID: 32185168 PMCID: PMC7058588 DOI: 10.3389/fbioe.2020.00120] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Accepted: 02/07/2020] [Indexed: 11/28/2022] Open
Abstract
A two-stage semi-continuous strategy for producing 2-keto-gluconic acid (2KGA) by Pseudomonas plecoglossicida JUIM01 from rice starch hydrolyzate (RSH) has been developed. The initial glucose concentration (140 g/L) was selected for first-stage fermentation due to its highest 2KGA productivity of 7.58 g/(L⋅h), cell weight of 3.91 g/L, and residual glucose concentration of 25.00 g/L. Followed by removing 70.0% (v/v) of the first-stage broth and feeding 400.0 g/L of glucose to the second-stage fermentor, a total of 50680.0 g glucose was consumed, and 50005.20 g 2KGA was obtained with a yield of 0.9867 g/g by P. plecoglossicida JUIM01 after a 3-cycle two-stage semi-continuous fermentation. Our results indicated that the developed two-stage semi-continuous fermentation could be industrially applied due to its high 2KGA concentration, 2KGA yield and operation efficiency.
Collapse
Affiliation(s)
- Lei Sun
- The Key Laboratory of Industrial Biotechnology, National Engineering Laboratory for Cereal Fermentation Technology, School of Biotechnology, Jiangnan University, Ministry of Education, Wuxi, China
| | - Da-Ming Wang
- The Key Laboratory of Industrial Biotechnology, National Engineering Laboratory for Cereal Fermentation Technology, School of Biotechnology, Jiangnan University, Ministry of Education, Wuxi, China.,School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
| | - Wen-Jing Sun
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
| | - Feng-Jie Cui
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
| | - Jin-Song Gong
- The Key Laboratory of Industrial Biotechnology, National Engineering Laboratory for Cereal Fermentation Technology, School of Biotechnology, Jiangnan University, Ministry of Education, Wuxi, China
| | - Xiao-Mei Zhang
- The Key Laboratory of Industrial Biotechnology, National Engineering Laboratory for Cereal Fermentation Technology, School of Biotechnology, Jiangnan University, Ministry of Education, Wuxi, China
| | - Jin-Song Shi
- The Key Laboratory of Industrial Biotechnology, National Engineering Laboratory for Cereal Fermentation Technology, School of Biotechnology, Jiangnan University, Ministry of Education, Wuxi, China
| | - Zheng-Hong Xu
- The Key Laboratory of Industrial Biotechnology, National Engineering Laboratory for Cereal Fermentation Technology, School of Biotechnology, Jiangnan University, Ministry of Education, Wuxi, China
| |
Collapse
|