2. Secondly, hot water treatment: directly put the raw materials into a multifunctional extractor, add distilled water 0/5 times of/kloc-0, stir evenly, leach 1.5-2.0h at 85℃, filter and separate to obtain the first leaching filtrate, add distilled water 0/0 times of/kloc-0 to the residue, stir evenly, and extract at 95℃.
3. Enzymolysis again: add the residue into distilled water with the amount of 15 times, stir evenly, and add compound enzymes (compound enzymes include 1.5%-2.5% of silk peptidase and 1.5%? 3% papain), enzymolysis 1- 1.5h at the temperature of 45-55℃ and the pH of 6.5-7, then rapidly heating to 98℃ to inactivate the enzyme, keeping the temperature for 0.5h, centrifugal separation to obtain the leaching solution, and recovering the residue for further treatment. 4. Then concentration: after the obtained leaching solutions are combined, they are concentrated under reduced pressure at low temperature to 1/6 and 1/4 of the volume of the raw material solution to obtain concentrated solution.
5. finally decolorizing: adding the concentrated solution into a decolorizing kettle at 40℃ and a pH value of 3? 4. Add 1.5%-2.5% decolorized activated carbon for sugar, stir evenly, decolorize 1.5-20min, filter while it is hot to obtain decolorized liquid, and recover activated carbon.