Technique for glycosylated degradation of white spirit waste lees to prepare fermentalbe sugar

Abstract

The invention relates to a technique for glycosylated degradation of white spirit waste lees to prepare fermentalbe sugar, which includes the procedures of drying and grinding of the white spirit waste lees, glycosylated degradation, the separation of saccharic acid, and the like. The technique is as follows: mixing ground waste lees with hydrogen chloride with mass fraction of 2% according to mass per unit volume of 1:10 for glycosylated degradation and collecting the filtrate; letting the filtrate pass through a chromatographic column which is filled with anionic resin, eluting through distilled water and collecting the eluate by step; and combining the eluates with sugar content equal to or more than 0.5 to be recovered sugar liquid. The recovered sugar liquid can be used as material for alcohol fermentation or other fermentations after being concentrated, and the used anionic exchange resin can be regenerated through NaOH. The concentration of the reducing sugar in the recovered sugar liquid prepared through the technique is equal to or more than 1%, wherein the content of dextrose is 55%, the content of xylose is 35% and the content of others is 10%; and the separation and recovery rate of the saccharic acid is more than 75%. The saccharic acid separation process is low in cost and no harmful impurities such as sulfate radical and the like are left behind, so the fermentalbe sugar has little effect to the subsequent alcohol fermentation or other fermentations. Therefore, the fermentalbe sugar is ideal material for alcohol fermentation and other fermentations.

Description

technical field [0001] The invention relates to a technique for saccharifying and degrading liquor waste, in particular to a new process for preparing fermentable sugar through saccharification and degrading liquor waste, which belongs to the field of light industry biotechnology. Background technique [0002] my country is a big wine production and consumption country. The large-scale production of liquor produces a huge amount of fermentation waste while meeting market needs and accumulating a large amount of construction funds for the development of the national economy. Because distiller's grains contain a large amount of organic matter, such as starch, cellulose, and organic acids, discarding distiller's grains as waste not only wastes resources, but also causes serious environmental pollution pressure. At present, the main utilization methods of domestic liquor discarded grains include: reproducing raw wine, producing glycerin, cultivating edible fungi, extracting and...

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Problems solved by technology

[0004] Song Andong et al. reported the experimental research on the production of fuel ethanol by fermenting distiller's grain biomass [Journal of Agricultural Engineering. 2003, 19(4): 278-281]. The results of the study show that the direct use of distilled grains to ferment the starch and cellulose of ethanol can produce ethanol at a rate of 2% and 4%, respectively, and their utilization rates are relatively low.

Secondly, Mo Kai et al. conducted a preliminary discussion on some processes of saccharification and degradation of liquor discarded grains [discussion on the preparation conditions of liquor discarded grains saccharification and degradation liquid. Liquor Science and Technology. 2007, 160(10): 85-87.], but did not form The complete process of liquor waste grains from pretreatment, saccharification and degradation to separation of sugar and acid

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