Method for improving extraction rate of cereal starch by extrusion combined alkali method
A technology of extrusion and puffing and extraction rate, which is applied in the field of food industry, can solve the cumbersome; Chinese invention patent (application announcement, not suitable for mass production, low starch extraction rate, etc., to achieve shortened extraction time, shortened soaking time, The effect of increasing the extraction rate
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Embodiment 1
[0029] Weigh 20kg of buckwheat, clean and remove impurities and then crush and remove the husks. The buckwheat after removing the husks is pulverized into 60-mesh powder with a pulverizer, and loaded into the hopper of the extruder. 35°C, 35°C, 45°C, 45°C, 50°C, the screw speed is 300rpm, the moisture content of the material is 45%, the diameter of the material outlet hole of the extruder die is 3mm, the extruded material is mixed with 0.08% hydrogen The sodium oxide solution was mixed, the ratio of material to liquid was 1:4, left standing for 8 hours, the supernatant was poured out, the lower mixed solution was centrifuged at 4000 r / min for 20 min, and the upper layer was removed after centrifugation to obtain crude starch milk; L hydrochloric acid was stirred evenly, washed by centrifugation at 5000r / min for 10min, then washed with water for 3 times to obtain pure starch milk, and then dried in an oven at 50°C for 24h to obtain the finished buckwheat starch, with a starch ex...
Embodiment 2
[0031] Weigh 20kg of rice, crush the rice into powder with a pulverizer after pretreatment, put it into the hopper of the extruder, and set the temperature of the six zones of the extruder to be 35°C, 40°C, 40°C, 50°C, 50°C, respectively. ℃, 60℃, the screw speed is 400rpm, the water content of the material is 40%, the diameter of the material outlet hole of the extruder die head is 3mm, the extruded material is mixed with 0.06% sodium hydroxide solution, and the material-liquid ratio is 1: 4. Let stand for 10h, pour off the supernatant, centrifuge the lower layer mixture at 5000r / min for 15min, remove the upper layer after centrifugation to obtain crude starch milk; add 0.5mol / L hydrochloric acid to the crude starch milk, stir evenly, and centrifuge once at 4000r / min, The time was 20 minutes, then washed with water for 3 times to obtain pure starch milk, and then dried in an oven at 50° C. for 24 hours to obtain the finished rice starch, and the starch extraction rate was 84%. ...
Embodiment 3
[0033] Weigh 30kg of buckwheat, clean and remove impurities and then crush and remove the husks. The buckwheat after removing the husks is pulverized into a powder of more than 80 meshes with a pulverizer, and is loaded into the hopper of the extruder. The temperature of the six zones of the extruder is set to 35 ℃, 35℃, 40℃, 40℃, 50℃, 60℃, the screw speed is 250rpm, the moisture content of the material is 40%, the diameter of the material outlet hole of the extruder die is 3mm, and the extruded material is mixed with 0.1 % sodium hydroxide solution was mixed, the ratio of material to liquid was 1:3, left standing for 10h, the supernatant was poured out, the lower mixed liquid was centrifuged at 4000r / min for 20min, and the supernatant liquid was removed after centrifugation to obtain crude starch milk; crude starch milk was added with 0.5 mol / L hydrochloric acid was stirred evenly, centrifuged and washed at 5000r / min for 10min, then washed with water for 3 times to obtain pure...
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