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.