Study on the Solid-State Fermentation Conditions for Producing Thermostable Xylanase Feed in a Pressure Pulsation Bioreactor
| Periodical | Advanced Materials Research (Volumes 236 - 238) |
|---|---|
| Main Theme | Application of Chemical Engineering |
| Edited by | Zhong Cao, Yinghe He, Lixian Sun and Xueqiang Cao |
| Pages | 72-76 |
| DOI | 10.4028/www.scientific.net/AMR.236-238.72 |
| Citation | Ge Yang et al., 2011, Advanced Materials Research, 236-238, 72 |
| Online since | May, 2011 |
| Authors | Ge Yang, Li Li Hou, Fu Liang Zhang |
| Keywords | Air Pressure Amplitude, Corn Cob and Wheat Bran, Solid-State Fermentation (SSF), Thermomyces Lanuginosus, Thermostable Xylanase |
| Price | US$ 28,- |
Air pressure amplitude serves as a critical control parameter in periodic pressure solid state fermentation process. Effects of air pressure amplitudes on thermostable xylanase production by Thermomyces lanuginosus SD-21 were investigated. Under the optimum periodic pressure amplitude, namely: at lower limit of 0.05 MPa and upper limit of 1.5 MPa. Among the lignocellulosic substrates tested, corn cob and wheat bran supported a high xylanase (EC 3.2.1.8) secretion by Humicola lanuginosa in solid-state fermentation (SSF). Enzyme production reached a peak in 96 h followed by a decline thereafter. Enzyme production was very high, xylanase activity 8237 IU /g of dry moldy bran can be obtained in the system compared with 4520 IU/g in conventional tray fermenter, cultivation of the mold in large enamel trays yielded a xylanase titer comparable with that in flasks. Parametric optimization resulted in a 45.13% increase in enzyme production in PPSSF.
