Institute of General and Ecological Chemistry, Faculty of Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland.
Institute of Fermentation Technology and Microbiology, Faculty of Food Science and Biotechnology, Lodz University of Technology, Wolczanska 171/173, 90-924 Lodz, Poland.
Molecules. 2017 Sep 13;22(9):1544. doi: 10.3390/molecules22091544.
The objective of this study was to develop a method for the thermally-assisted acidic hydrolysis of waste biomass from the sugar industry (sugar beet pulp and leaves) for chemical and biotechnological purposes. The distillates, containing furfural, can be catalytically reduced directly into furfurayl alcohol or tetrahydrofurfuryl alcohol. The sugars present in the hydrolysates can be converted by lactic bacteria into lactic acid, which, by catalytic reduction, leads to propylene glycol. The sugars may also be utilized by microorganisms in the process of cell proliferation, and the biomass obtained used as a protein supplement in animal feed. Our study also considered the effects of the mode and length of preservation (fresh, ensilage, and drying) on the yields of furfural and monosaccharides. The yield of furfural in the distillates was measured using gas chromatography with flame ionization detector (GC-FID). The content of monosaccharides in the hydrolysates was measured spectrophotometrically using enzymatic kits. Biomass preserved under all tested conditions produced high yields of furfural, comparable to those for fresh material. Long-term storage of ensiled waste biomass did not result in loss of furfural productivity. However, there were significant reductions in the amounts of monosaccharides in the hydrolysates.
本研究旨在开发一种用于热辅助酸性水解糖工业废料（甜菜渣和叶）的方法，以用于化学和生物技术目的。馏出物中含有糠醛，可直接催化还原为糠醇或四氢糠醇。水解物中存在的糖可被乳酸菌转化为乳酸，通过催化还原可得到丙二醇。糖也可在微生物细胞增殖过程中被利用，所获得的生物质可用作动物饲料中的蛋白质补充物。我们的研究还考虑了保存方式和时间（新鲜、青贮和干燥）对糠醛和单糖产率的影响。使用带有火焰离子化检测器的气相色谱法（GC-FID）测量馏出物中的糠醛产量。使用酶试剂盒分光光度法测量水解物中单糖的含量。在所有测试条件下保存的生物质均产生了高产量的糠醛，与新鲜材料相当。长期储存青贮废物生物质不会导致糠醛生产力损失。然而，水解物中单糖的含量显著减少。
