The Effect of Different Ethoxylations for Sorbitan Monolaurate on Enhancing Simultaneous Saccharification and Fermentation (SSF) of Wheat Straw to Ethanol |
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| Authors: | A M Badawi A A Fahmy Karima A Mohamed M R Noor El-Din M G Riad |
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| Institution: | (1) Egyptian Petroleum Resarch Institute, Nasr City, Cairo, 11727, Egypt;(2) Faculty of Science, Cairo University, Giza, Egypt;(3) National Research Center (NRC), Cairo, Egypt;(4) Science and Technology Center of Excellence, Cairo, Egypt; |
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| Abstract: | In this paper, four nonionic surfactants with different hydrophilic–lipophilic balance (HLB) based on sorbitan monolaurate
were synthesized by introducing ethylene oxide gas (n = 20, 40, 60, and 80 ethylene oxide units). The chemical structure of the prepared ethoxylated surfactants was confirmed
using Fourier transform-infrared and 1H NMR spectroscopes. The surface tension and thermodynamic properties of the prepared surfactants have been studied. The simultaneous
saccharification and fermentation (SSF) process for ethanol production from microwave/alkali pretreated wheat straw has been
assayed using nonionic surfactants have different ethylene oxide units. Ethanol yield was 82% and 61% for Kluyveromyces marxianus and Saccharomyces cerevisiae, respectively, with the addition of 2.5 g/l of the prepared nonionic surfactant (HLB = 18.2). Results show that the production
of ethanol from microwave/alkali pretreated wheat straw increased with increasing the (HLB) value of the nonionic surfactant. |
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