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  • Title: Soybean protein as a cost-effective lignin-blocking additive for the saccharification of sugarcane bagasse.
    Author: Florencio C, Badino AC, Farinas CS.
    Journal: Bioresour Technol; 2016 Dec; 221():172-180. PubMed ID: 27639236.
    Abstract:
    Addition of surfactants, polymers, and non-catalytic proteins can improve the enzymatic hydrolysis of lignocellulosic materials by blocking the exposed lignin surfaces, but involves extra expense. Here, soybean protein, one of the cheapest proteins available, was evaluated as an alternative additive for the enzymatic hydrolysis of pretreated sugarcane bagasse. The effect of the enzyme source was investigated using enzymatic cocktails from A. niger and T. reesei cultivated under solid-state, submerged, and sequential fermentation. The use of soybean protein led to approximately 2-fold increases in hydrolysis, relative to the control, for both A. niger and T. reesei enzymatic cocktails from solid-state fermentation. The effect was comparable to that of BSA. Moreover, the use of soybean protein and a 1:1 combination of A. niger and T. reesei enzymatic cocktails resulted in 54% higher glucose release, compared to the control. Soybean protein is a potential cost-effective additive for use in the biomass conversion process.
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