The rice hull is an abundant and renewable biomass resource, which contains rich carbohydrates and can be used as an alternative energy source. In order to exploit and utilize the biomass energy in rice hull, extrusion and ultrasound technologies were used to pretreat the rice hull. Response surface method (RSM) was used to optimize the extrusion conditions, and the optimum extrusion condition were obtained as the follows: material diameter, 60 mesh; material moisture, 29 %; extrusion temperature, 143 °C; screw speed, 350 rpm. Under the conditions, the expansion degree of rice hull was 2.16. After extrusion, the rice hull was subjected to ultrasound pretreatment for 1.5 h at 40 KHz/500 W. After this above, cellulase, β-glucosidase, and hemicellulose were used to hydrolyze the rice hull. And 77.50 % of conversion of total cellulose and hemicellulose was obtained. The yield for reducing sugars, glucose, and xylose was 381.59, 291.59, and 88.87 mg/g rice hull, respectively.

稻壳是一种丰富的可再生生物质资源，其中包含丰富的碳水化合物，可以用作替代能源。为了开发和利用稻壳中的生物质能，采用挤压和超声技术对稻壳进行预处理。采用响应面法（RSM）优化挤压条件，得到最佳挤压条件为：材料直径60目；物料水分，29％；挤出温度为143℃；螺杆转速350 rpm。在此条件下，稻壳的膨胀度为2.16。挤出后，将稻壳在40 KHz / 500 W下进行超声波预处理1.5 h。之后，使用纤维素酶，β-葡萄糖苷酶和半纤维素水解稻壳。和77。获得了总纤维素和半纤维素的50％的转化率。还原糖，葡萄糖和木糖的产量分别为381.59、291.59和88.87 mg / g稻壳。