Starch production technology

Abstract

The invention discloses a starch production technology. The starch production technology comprises the following steps: carrying out purifying, carrying out soaking, carrying out crushing, separating embryos, carrying out fine-grinding, separating fiber, separating protein, washing starch, carrying out refining, carrying out dehydrating, carrying out drying, carrying out packing, and carrying out recycling. On basis of the characteristics of small amount of siphon suction produced in the step of carrying out dehydrating and small amount of suspended solids in steam in the steamed corn pulp produced in the step of separating fiber in the starch production technology, the pH value is regulated to 7.0-7.5 by using sodium carbonate; and the product is reused in the 12-stage cyclone washing process in the step of starch washing. Compared with traditional technologies, the starch production technology realizes recycling of the siphon suction and the steamed corn pulp vapor-water, reduces discharge of starch wastewater, decreases new water consumption amount in the 12-stage cyclone washing process in the separating step, increases yields of the corresponding dry matters by reducing water discharge amount, reduces influent load of starch wastewater treatment, ensures water-treatment influent sulfite content lower than 50mg / l, reduces the load of the aeration tank before water inletting into the IC reactor, and improves the service life of the aeration tank system.

Description

technical field [0001] The invention belongs to the technical field of food processing, and mainly relates to a starch production process. Background technique [0002] At present, in the domestic traditional starch production process, the dehydration of refined starch milk adopts a horizontal siphon scraper centrifuge. Through the dual action of centrifugal force and siphon suction, solid-liquid separation is realized. The dehydration filtrate and siphon liquid of the scraper centrifuge are discharged to the waste water pool. The corn steep liquor produced by the soaking process of starch production is evaporated and concentrated to obtain concentrated corn steep liquor, and the steam condensate is discharged to the waste water tank, which will generate a large amount of waste water during production, increase power consumption and water consumption, and also cause a burden to the subsequent sewage treatment plant. [0003] It is necessary to seek a starch production proces...

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Problems solved by technology

[0002] At present, in the domestic traditional starch production process, the dehydration of refined starch milk adopts a horizontal siphon scraper centrifuge. Through the dual action of centrifugal force and siphon suction, solid-liquid separation is realized. The dehydration filtrate and siphon liquid of the scraper centrifuge are discharged to the waste water pool. The corn steep liquor produced by the soaking process of starch production is evaporated and concentrated to obtain concentrated corn steep liquor, and the steam condensate is discharged to the waste water tank, which will generate a large amount of waste water during production, increase power consumption and water consumption, and also cause a burden to the subsequent sewage treatment plant

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