BioChem - DOS

Improved 1,3-propanediol production with hemicellulosic hydrolysates (corn straw) as cosubstrate: Impact of degradation products on Klebsiella pneumoniae growth and 1,3-propanediol fermentation

Bioresource technology : biomass, bioenergy, biowastes, conversion technologies, biotransformations, production technologies

Jin, P.; Li, S.; Lu, S.g.; Zhu, J.g.; Huang, H.

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 (0.28g/l) and sodium acetate (1.46g/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 71.58g/l, 0.65mol/mol and 1.93g/l/h, respectively, which were 17.8%, 25.0% and 17.7% higher than that from glycerol alone.

2011

Elsevier Applied Science

0960-8524

102

2

pp.1815-1821

10.1016/j.biortech.2010.09.048

http://click.ndsl.kr/servlet/OpenAPIDetailView?keyValue=05787966&target=NART&cn=NART55145371

1,3-Propanediol; Corn straw; Hemicellulosic hydrolysates; Xylose; Klebsiella pneumoniae