Isolation Lignin Degradation Bacteria Acinetobacter Sp. B213 Pretreatment Effectively Improved Hydrolysis of Corn Straw by Enhance Cellulose Retention and Reduce Lignin Degradation Inhibitor

This study focused on the effects of pretreating corn straw with newly isolated Acinetobacter sp. B213 on the degradation and saccharification rate of lignocellulose. The strain has lignin degrading enzyme activity and without cellulase activity, which was with lignin as the sole carbon source and decomposition of phenolic inhibitors produced by lignin degradation. The strain pretreatment of corn straw cellulose retention rate and lignin degradation rate was 98.51% and 12.02%, which was 10.53% higher and 20.36% lower than 1% NaOH pretreatment of 87.98% and 32.38%, respectively. The glucose productivity of Acinetobacter sp. B213 pretreatment corn straw of complete hydrolysis was 100%, higher 14.25% than 1% NaOH pretreatment. These results showed that the pretreatment of Acinetobacter sp. B213 increased the cellulose retention rate and reduced the inhibition of lignin degradation products on cellulase, which improves the saccharification rate of cellulose.