Method for preparing alcohol and biochar from traditional Chinese medicine residues in gradient mode
A technology of traditional Chinese medicine dregs and biochar, applied in the field of resource utilization of biomass waste, to achieve the effect of solving the problem of high added value utilization, good economic benefits, and saving fermentation costs
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[0024] The method of the invention is used to carry out cascade utilization of Hypericum perforatum dregs to prepare ethanol and biochar. Specific steps are as follows:
[0025] (1) Grind Hypericum perforatum dregs with a moisture content of 8.8% to 40-mesh powder, weigh 10.0 g of Hypericum perforatum dregs, add 100 mL of 2.0% sodium hydroxide solution to the dregs, place in a sterilized Pot, soak at 120°C and 121MPa for 10min, cool to room temperature after pretreatment;
[0026] (2) Add KH at 1.5g / L (total fermentation volume) 2 PO 4 , according to the carbon-nitrogen ratio is 20:1 to add Danshen medicine dregs;
[0027] (3) adjusting the slurry pH in step (2) to be 5.0;
[0028] (4) Add Angel yeast at 0.005 g per gram of Hypericum perforatum dregs (dry weight) to the slurry obtained above, add cellulase at 100 enzyme activity units per gram of Hypericum perforatum dregs, and isolate the air at 37°C Standing and fermenting for 72h, the yield of ethanol obtained is 6.0g / ...
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