Fractionation of corn stover by hot-water and aqueous ammonia treatment.

摘要: The efficiency of biomass utilization can be significantly improved by fractionation biomass. A two-stage percolation process was investigated for pretreatment and corn stover. is composed hot water treatment followed with aqueous ammonia, both applied in a flow-through (percolation) reactor. first stage processing intended hemicellulose removal whereas the second delignification. pretreated material nearly pure cellulose reagents are cheap environmentally friendly. conditions that achieve satisfactory level acceptable enzymatic hydrolysis were identified terms reaction temperature, flow rate (retention time) time each stage. With proper operation treatment, achieved to extent xylan fraction hydrolyzed 92-95% conversion, recovered 83-86% yields; lignin 75-81%. remaining solid after contained 78-85% cellulose. treatments enhanced digestibility 90-96% 60 FPU/g glucan, 87-89% 15 glucan. In composition data indicate content one major factors controlling digestibility.