SYSTEM AND METHOD FOR INCREASING CARBOHYDRATE AND LIGNIN CONCENTRATION IN HYDROLYSATE OF BIOMASS PRETREATMENT

摘要

A system and method are disclosed for pretreating biomass. Countercurrent flowthrough and recycled hydrolysate are employed to pretreat the biomass. The concentrations of carbohydrate and lignin in the final hydrolysate are increased. Temperature ingredients in the pretreatment vessel may be used to increase the pretreatment efficiency. By recycling the heat and the liquid, the disclosed methods help reduce energy and/or water used in the processes.