A Combination Method of Liquid Hot Water and Phosphotungstic Acid Pretreatment for Improving the Enzymatic Saccharification Efficiency of Rice Straw

Chemical pretreatment can significantly improve the enzymatic hydrolysis efficiency of lignocellulosic biomass, thereby improving yield sugar materials for production cellulosic ethanol, but commonly used acid–base catalysts are difficult to recover and reuse. In this work, a combination method liquid hot water (LHW) phosphotungstic acid (PTA) was performed saccharification rice straw, we attempted evaluate reuse effect PTA catalysts. The straw first treated with LHW at 180 °C 90 min, then 20 mM 130 60 min. After pretreatment, cellulose glucose recovery increased by 201.85% 164.25%, respectively. Glucose accounted 96.8% total reducing in final hydrolysate. each approximately 70.8–73.2% catalyst could be recycled. Moreover, catalytic activity that had been five times did not decrease. improved attributed removal 89.24% hemicellulose 21.33% lignin from substrate. two-step LHW-PTA pretreat biomass field ethanol production.