中试规模下预处理甘蔗渣副产物形成和糖单体化分析：自水解、碱性和酸性预处理的差异。
Analysis of by-product formation and sugar monomerization in sugarcane bagasse pretreated at pilot plant scale: differences between autohydrolysis, alkaline and acid pretreatment.
机构信息
Food and Biobased Research, Wageningen University and Research Center, PO Box 17, 6700 AA Wageningen, The Netherlands; Bioprocess Engineering, Wageningen University and Research Center, PO Box 16, 6700 AA Wageningen, The Netherlands.
Food and Biobased Research, Wageningen University and Research Center, PO Box 17, 6700 AA Wageningen, The Netherlands.
出版信息
Bioresour Technol. 2015 Apr;181:114-23. doi: 10.1016/j.biortech.2015.01.033. Epub 2015 Jan 20.
Sugarcane bagasse is an interesting feedstock for the biobased economy since a large fraction is polymerized sugars. Autohydrolysis, alkaline and acid pretreatment conditions combined with enzyme hydrolysis were used on lignocellulose rich bagasse to acquire monomeric. By-products found after pretreatment included acetic, glycolic and coumaric acid in concentrations up to 40, 21 and 2.5 g/kg dry weight bagasse respectively. Alkaline pretreated material contained up to 45 g/kg bagasse DW of sodium. Acid and autohydrolysis pretreatment results in a furan formation of 14 g/kg and 25 g/kg DW bagasse respectively. Enzyme monomerization efficiencies of pretreated solid material after 72 h were 81% for acid pretreatment, 77% for autohydrolysis and 57% for alkaline pretreatment. Solid material was washed with superheated water to decrease the amount of by-products. Washing decreased organic acid, phenol and furan concentrations in solid material by at least 60%, without a major sugar loss.
甘蔗渣是生物基经济中一种很有趣的原料，因为它含有大量聚合糖。对富含木质纤维素的甘蔗渣进行水热预处理、酸碱预处理并结合酶解处理，以获得单体。预处理后的副产物包括乙酸、乙醇酸和香豆酸，浓度分别高达 40、21 和 2.5 g/kg 干重甘蔗渣。碱性预处理材料含有高达 45 g/kg 干重甘蔗渣 DW 的钠。酸预处理和水热预处理分别导致呋喃的形成量为 14 g/kg 和 25 g/kg DW 甘蔗渣。预处理固体材料在 72 h 后进行酶单体化的效率分别为酸预处理 81%、水热预处理 77%和碱预处理 57%。用过热的水对固体物质进行洗涤，以减少副产物的含量。洗涤至少减少了固体材料中有机酸、酚类和呋喃浓度的 60%，而不会导致主要糖的损失。
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