Method for preparing corn starch total sugar powder
A technology of corn starch and powdered sugar is applied in the field of bioengineering, which can solve the problems of long saccharification time and low glucose conversion rate, and achieve the effects of improving conversion rate, wide application prospect and shortening production cycle.
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[0012] Embodiment 1: the preparation of a kind of cornstarch whole sugar powder:
[0013] The cornstarch is configured into a 30%-40% starch slurry. Use HCl or NaCO3 to adjust the pH value of the slurry to 6.2-6.5. Add α-amylase 30U / g starch, and use the second injection liquefaction method for liquefaction. The first injection liquefaction temperature is 110°C, 45min, the second injection liquefaction temperature is 130°C, 15min, and the color reaction with iodine is negative. Indicates the end point of liquefaction. Then the temperature was raised to 140°C to inactivate the enzyme for 10 minutes. Then the temperature was lowered to 60°C. The pH was adjusted to 4.0-4.5 with HCl, the temperature was controlled at 60±1°C, the dosage of glucoamylase was 250u / g starch, and the dosage of pullulanase was 0.13U / g starch. When the saccharification time is 60 hours and the DE value is almost unchanged, the saccharification is terminated. Add 1% bentonite to the saccharified sugar...
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