Optimization of Process Parameters for Ethanol Production from Alkaline-Pretreated Wheat Straw by Fed-Batch Simultaneous Saccharification and Fermentation

Abstract:

The alkaline-pretreated wheat straw was used as raw materials, and the fed-batch simultaneous saccharification and fermentation (SSF) process for ethanol production with higher substrate loading (up to 16% (w/v)) was investigated. Firstly, the Fed-batch SSF with different feeding strategy was optimized. The highest ethanol concentration reached to 37.9 g/L with an initial substrate loading of 10% (w/v), and equal substrate addition (3%) at 8h and 16h respectively. Then the effects of Tween-20 were also investigated. The results showed that Tween-20 addition with 2.0 g/L can improved the ethanol production. Furthermore, a nonisothermal fed-batch SSF was proposed, and the ethanol concentration of 41.5 g/L, corresponds to 81.0 % of the theoretical yield was achieved within 72 h.

• Periodical: Advanced Materials Research (Volumes 236-238)
• Pages: 922-925
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.236-238.922
• Online since: May 2011
• Authors: Chun Chang, Gui Zhuan Xu, Xiao Jian Ma
• Keywords: Ethanol, Fed Batch, Simultaneous Saccharification and Fermentation (SSF), Wheat Straw

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