酸催化小麦秸秆的自水解以提高糖的回收率。
Acid-catalyzed autohydrolysis of wheat straw to improve sugar recovery.
机构信息
Department of Forest Industry Engineering, Bursa Technical University, 16200 Bursa, Turkey.
Department of Forest Biomaterials, North Carolina State University, Campus Box 8005, Raleigh, NC 27695-8005, USA.
出版信息
Bioresour Technol. 2014 Oct;169:1-8. doi: 10.1016/j.biortech.2014.06.081. Epub 2014 Jun 30.
A comparison study of autohydrolysis and acid-catalyzed autohydrolysis of wheat straw was performed to understand the impact of acid addition on overall sugar recovery. Autohydrolysis combined with refining is capable of achieving sugar recoveries in the mid 70s. If the addition of a small amount of acid is capable of increasing the sugar recovery even higher it may be economically attractive. Acetic, sulfuric, hydrochloric and sulfurous acids were selected for acid-catalyzed autohydrolysis pretreatments. Autohydrolysis with no acid at 190 °C showed the highest total sugar in the prehydrolyzate. Enzymatic hydrolysis was performed for all the post-treated solids with and without refining at enzyme loadings of 4 and 10 FPU/g for 96 h. Acid-catalyzed autohydrolysis at 190 °C with sulfurous acid showed the highest total sugar recovery of 81.2% at 4 FPU/g enzyme charge compared with 64.3% at 190 °C autohydrolysis without acid.
进行了小麦秸秆的自水解和酸催化自水解对比研究，以了解酸添加对整体糖回收的影响。自水解与精炼相结合，能够实现 70%左右的糖回收率。如果添加少量酸就能进一步提高糖回收率，那么从经济角度来看可能会更具吸引力。选择乙酸、硫酸、盐酸和亚硫酸进行酸催化自水解预处理。在 190°C 下不加酸的自水解反应中，预水解液中总糖含量最高。对所有经后处理的固体进行了酶解，酶用量为 4 和 10 FPU/g，酶解 96 小时。在 190°C 下用亚硫酸进行酸催化自水解，在 4 FPU/g 酶负荷下的总糖回收率最高，为 81.2%，而在 190°C 下不加酸的自水解反应中，总糖回收率为 64.3%。
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