Abstract:The effect of bovine serum albumin (BSA) addition on the enzymatic hydrolysis of rice straw residues containing different lignin content obtained by different [Ch][AA] ILs-water mixture pretreatment were investigated. The results showed that a slight increase in cellulose and xylan digestibility occurred under low enzyme loading after BSA pre-incubation; the maximum digestibility was increased by 5% and 7% BSA, respectively. However, there was no clear enhancement in cellulose and xylan digestibility with high enzyme loading. This study also found that the rice straw lignin content did not affect enzyme adsorption when pretreated with different [Ch] [AA] ILs-water mixtures. Overall, the results indicate that it is polysaccharide accessibility to enzymes rather than lignin adsorption and inhibition of enzymes that mainly determines the efficiency of enzymatic degradation of polysaccharides in the rice straw residues obtained by [Ch][AA] ILs-water mixture pretreatment.
