酸水解制糖的提取预处理工艺研究

Sylvia Alcázar-Alay, Fiorella P. Cárdenas-Toro, D. Santos, M. Meireles
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引用次数: 13

摘要

这项工作涉及工业上使用的三种植物的残留物:巴西人参(Pfaffia glomerata),棕榈(Elaeis guineensis)和红木(Bixa orellana L.)。研究的植物残油提取方法包括索氏萃取法(SE)、加压液体萃取法(PLE)和超临界流体萃取法(SFE)。利用扫描电镜(SEM)观察了这些提取过程对植物基质结构的影响。植物残体被酸水解。采用0.5 L常压反应器和沸点溶剂进行水解。巴西人参在盐酸溶液(0.5、2.5和5.0%,v/v)中水解60 min。棕榈压榨纤维和红木在硫酸溶液(1.5和3.0%,v/v)中水解90 min。水解产生的糖通过分光光度法定量解释为还原糖(RS) (g葡萄糖/100 g原料)和总还原糖(TRS) (g蔗糖/100 g原料)。扫描电镜观察结果表明,提取处理改变了蔬菜基质的结构和成分比例。每种蔬菜基质的酸水解过程表现出不同的反应动力学。糖聚合物的可得性、来源和酸浓度是影响水解反应的变量。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Study of an Extraction Process as the Pretreatment Step for Sugar Production from Acid Hydrolysis
This work involves the residues of three plant species used in industry: Brazilian ginseng (Pfaffia glomerata), palm (Elaeis guineensis) and annatto (Bixa orellana L.). The studied plant residues come from oil and biocompounds extraction: Soxhlet extraction (SE), Pressurized liquid extraction (PLE) and Supercritical fluid extraction (SFE). The effects of these extraction processes on the structures of plant matrices were observed using scanning electron microscopy (SEM). Plant residues were subjected to acid hydrolysis. The hydrolysis process was conducted using a 0.5 L reactor at atmospheric pressure and the solvent at boiling temperature. Brazilian ginseng was hydrolyzed in hydrochloric acid solution (0.5, 2.5 and 5.0%, v/v) for 60 min. Palm pressed fiber and annatto were hydrolyzed in sulfuric acid solution (1.5 and 3.0%, v/v) for 90 min. Sugars produced by the hydrolysis were quantified and interpreted as Reducing sugars (RS) (g glucose/100 g raw material) and Total reducing sugars (TRS) (g sucrose/100 g raw material) by a spectrophotometric method. The results observed by SEM showed that the extraction treatments modified the vegetable matrix with respect to its structure and component ratio. The acid hydrolysis process of each vegetable matrix showed different reaction kinetics. The availability and source of the sugar polymers and the acid concentration were variables that affected the hydrolysis reaction.
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