Study on Enzymatic Hydrolysis Improvement of Corn Stalk with Polyol-based Ternary DES Pretreatment
Effects of novel polyol-based deep eutectic solvent(DES)pretreatment on corn stalk components,surface morphology,polymer-ization degree(DP)of cellulose,and enzymatic efficiency were investigated.The results showed that polyol-based DES pretreatment could efficiently remove hemicellulose and acid insoluble lignin(AIL)from corn stalk and retain cellulose,but there was no positive correlation between the carbon chain length of polyol and pretreatment performance.Choline chloride/1,4-butanediol/4-hydroxy benzenesulfonic acid was the optimum polyol-based DES system,removing nearly 100％hemicellulose and 98％AIL,but saving 84％cellulose and DP=894.The surface of pretreated corn stalk was rough,porous,and no deposited lignin and pseudo-lignin particles.The corresponding enzymatic effi-ciency was as high as 94.80％,which was 5.9 times higher than that of raw corn stalk.In summary,the polyol-based DES pretreatment could greatly enhance the enzymatic performance by reducing cellulose DP,removing hemicellulose and AIL,and simultaneously inhibiting lignin redeposition and improving the surface roughness of corn stalk.
万方数据
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