A kind of method for continuous liquefaction of high-concentration starch
A high-concentration, starch-based technology, which is applied in the field of starch sugar processing, can solve the problems of high-concentration starch milk gelatinization concentration, etc., and achieve the effect of less impurities, clear saccharification liquid and fast filtration speed
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Embodiment 1
[0080] (1) Using commercially available corn starch as a raw material, prepare a starch milk with a dry mass fraction of 45% by weight in a mixing tank at 50°C, and adjust the pH to 6.0 with 8M hydrochloric acid. Add 0.15‰ of medium temperature α-amylase, 0.2‰ of high temperature resistant α-amylase, 0.04‰ of lipase and 0.07‰ of neutral protease into the slurry tank, and keep the mixture at 55°C for 0.5h to obtain a brix value of 15 % Of the first starch milk;
[0081] (2) The first starch emulsion is discharged through a pipe for spray liquefaction, the temperature of the spray port is 108°C and the temperature is maintained in the pipe for 3 minutes, and the steam pressure is 0.6 MPa. The sprayed liquefied product is flashed, the temperature is lowered to 98°C, and then it is kept at 95°C for 2 hours to obtain a liquefied liquid.
[0082] After measurement, the DE value of the obtained liquefied liquid was 25, and the protein flocculated and floated on the liquefied liquid. Fil...
Embodiment 2
[0084] (1) Using commercially available corn starch as a raw material, prepare a starch milk with a dry mass fraction of 40% by weight in a mixing tank at 50°C, adjust the pH to 6.0 with 8M hydrochloric acid, and adjust the starch to the dry basis. Add 0.25‰ of medium temperature alpha-amylase, 0.2‰ of high temperature resistant alpha-amylase, 0.06‰ of lipase and 0.1‰ of neutral protease into the slurry tank. After mixing, keep it at 55°C for 1h to obtain a brix value of 15% 的 first starch milk;
[0085] (2) Stir and add corn starch to the first starch milk to obtain a second starch milk with a dry basis mass fraction of 55wt%, and add 0.25‰ of medium temperature α-amylase and 0.2‰ of the starch to the mixing tank. High-temperature resistant α-amylase, 0.06‰ lipase and 0.1‰ neutral protease are mixed and kept at 55°C for more than 0.5h to obtain a third starch milk with a brix value of 24%;
[0086] (3) With 0.18m 3 / h The third starch emulsion is discharged through the pipe for sp...
Embodiment 3
[0089] (1) Using commercially available corn starch as a raw material, prepare a starch milk with a dry mass fraction of 45% by weight in a mixing tank at 50°C, and adjust the pH to 6.0 with 8M hydrochloric acid. Add 0.35‰ of medium temperature α-amylase, 0.25‰ of high temperature resistant α-amylase, 0.08‰ of lipase, and 0.12‰ of neutral protease into the slurry tank, and keep the mixture at 55°C for 1.5h to obtain a brix value of 17 % Of the first starch milk;
[0090] (2) Stir and add corn starch to the first starch milk to obtain a second starch milk with a dry mass fraction of 70% by weight, and add 0.35‰ of medium temperature α-amylase and 0.25‰ of the blending tank to the mixing tank. High-temperature resistant α-amylase, 0.08‰ lipase and 0.12‰ neutral protease are mixed and kept at 55°C for more than 0.5h to obtain a third starch milk with a brix value of 22%;
[0091] (3) With 0.18m 3 / h The third starch emulsion is discharged through the pipe for spray liquefaction. The ...
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