Research on steam explosion processing of rice straw feed | 水稻秸秆饲料的汽爆加工工艺研究

Chinese. 为了提高水稻秸秆饲料的纤维成分吸收率,采用一次回归中心组合正交旋转试验,研究了汽爆压力、保持压力时间和秸秆含水率对秸秆酶解还原糖产量的影响。结果表明:汽爆压力、保持压力的时间和秸秆含水率对水稻秸秆酶解还原糖产量有显著影响。随着压力和保压时间的增加,酶解还原糖产量明显增加;而随着秸秆含水率的升高,酶解还原糖产量降低。在蒸汽压力1.6 MPa,保持压力时间140 s,含水率40%的工艺条件下,水稻秸秆酶解还原糖产量最高,为34.3%。与微波辐射、氢氧化钠碱化、氨水氨化、尿素氨化以及热喷等处理和加工方法相比,汽爆处理的水稻秸秆酶解还原糖产量最高,是热喷处理的2.14倍。

English. To improve rice straw feed polysaccharide absorption rate,a central composed regression experiment was designed for studying the effects of steam explosion pressure,holding pressure time and straw moisture content on the enzymatic hydrolysis reducing sugar yield of steam explosion rice straw.The results showed that steam explosion pressure,pressure maintaining time and straw moisture content had significant effect on the yield of reducing sugar of steam explosion rice straw.With the pressure and pressure maintaining time increasing,the yield of reducing sugar significantly increased.When the straw moisture content increased,the yield of reducing sugar significantly decreased.In the steam pressure of 1.6 MPa,holding pressure time of 140 s and moisture content of 40% conditions,the yield of enzymatic hydrolysis reducing sugar of steam-exploded rice straw was up to 34.3%.With comparison of microwave radiation,sodium hydroxide Alkalization,ammonia ammonification,urea ammonification,and thermal spray processing,the steam explosion pretreatment could get the highest reducing sugar yield of rice straw,which is 2.14 times amounts of the thermal spray processing.