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  • Title: Evaluation of pretreatment methods for enzymatic saccharification of wheat straw for bioethanol production.
    Author: Govumoni SP, Koti S, Kothagouni SY, Venkateshwar S, Linga VR.
    Journal: Carbohydr Polym; 2013 Jan 16; 91(2):646-50. PubMed ID: 23121959.
    Abstract:
    Pretreatment is an essential step in the enzymatic hydrolysis of biomass and subsequent production of bioethanol. The current study is focused on two different pretreatment methods of wheat straw using mild temperatures (100°C for 2h and RT for overnight). In one method, native substrate was treated with 1.5% (w/v) NaOH at two different above mentioned conditions followed by acid hydrolysis (0.75% (v/v) sulfuric acid at 100°C for 2h). In another method, the native substrate was initially treated with acid (0.75% (v/v) sulfuric acid at 100°C for 2h) followed by treatment with 1.5% (w/v) NaOH at two different above conditions. After the pretreatments, the residues were treated with Accellerase 1500 (26U/g) and maximum yield of glucose (65.2gL(-1)) were found with 0.75% sulfuric acid (100°C for 2h) followed by alkali (1.5% NaOH at 100°C for 2h). Fermentation of this hydrolyzate using Saccharomyces cerevisiae strain produced 24.4gL(-1) of ethanol with corresponding yield of 0.44g/g.
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