期刊
BIORESOURCE TECHNOLOGY
卷 102, 期 2, 页码 1815-1821出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2010.09.048
关键词
1,3-Propanediol; Corn straw; Hemicellulosic hydrolysates; Xylose; Klebsiella pneumoniae
资金
- National Natural science Foundation of China [200936002]
- national basic Research program of China [2009CB724701]
- National High Technology Research and Development Program of China [2006AA020103]
To improve 1,3-propanediol (1,3-PD) production by an economic and efficient approach, hemicellulosic hydrolysates (HH) used as cosubstrate resulted in more biomass and higher reducing power for 1,3-PD production. The effects of primary degradation products such as individual sugars (xylose, glucose, mannose, arabinose and galactose) and major inhibitors (furfural, acetate and formate) on the Klebsiella pneumoiae growth and 1,3-PD production were investigated in this study. Xylose and mannose could efficiently promote the 1,3-PD production and cell growth. Furfural (0.28 g/l) and sodium acetate (1.46 g/l) in low concentration were not inhibitory to Klebsiella pneumoniae, rather they have stimulatory effect on the growth and 1,3-PD biosynthesis, especially the acetate. In fed-batch fermentation with HH as cosubstrate, the final 1,3-PD production, conversion from glycerol and productivity were 71.58 g/l, 0.65 mol/mol and 1.93 g/l/h, respectively, which were 17.8%, 25.0% and 17.7% higher than that from glycerol alone. (C) 2010 Elsevier Ltd. All rights reserved.
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