Puerarin of recovery time is the end of January to early February, the total flavonoids in radix puerariae and the highest content of isoflavones, puerarin from excavated to the processing, storage period with a week advisable, storage time is too long, it is easy to oxidation discoloration, fermentation, decay, and the quality decline of starch.
The production of kudzu root starch is usually cleaned, pulverized, sifted (filtered, centrifuged or precipitated), dehydrated, drying and so on. Shredded puerarin after alkali soaking, the vast majority of flavonoids in starch emulsion by leaching, regulate the pH of starch emulsion with HCI to 5 ~ 6, due to the hard dissolved in acid and flavonoids with starch a deposited, so as to increase the starch content of total flavonoids in.
Is given priority to with manual mill type of kudzu root starch processing, in recent years are also constantly improve the mechanization degree, potato qing-jie sun, set machine, conveyor, drum washing machine, fly hammer type pulp machine, 120 ℃ pressure curved sieve, vertical centrifugal screen, butterfly separator kudzu root starch industrial continuous production process were studied, through screening, such as centrifugal process, the kudzu root starch and fiber, protein and other impurities separated from ge powder, nissan ge powder can reach more than 10 tons, recovery rate can reach more than 90%.
Because the kudzu root skin carries part of the pigment of adsorption on the starch granules, can improve the outside of kudzu root starch by whitening, xian-han zhou choose sodium hypochlorite bleach, such as sodium hexametaphosphate as the quality improver, optimum whitening process conditions determined by orthogonal experiments as follows: the ratio of material to water 1:2, material liquid pH6.5, 40 min bleaching time, temperature of 40 ℃.
