The invention discloses yam bean
dietary fiber powder with a
prebiotic function and a preparation method thereof.The yam bean
powder is prepared by taking fresh yam bean tuberous roots as raw materials through the steps of cleaning, peeling,
slicing, color protecting, first-time
grinding, freezing
grinding, limited enzymolysis performing and
drum drying, crosslinking adsorbing, complexing, secondary
grinding, mixing,
extrusion granulating, sieving and packaging, the prepared yam bean
powder retains all dietary fibers of the yam beans and the original
flavor of the yam beans, contains high-resistance
starch and has the instant
solubility and the
prebiotic function.According to the yam bean
dietary fiber powder with the
prebiotic function and the preparation method thereof, embedding crosslinking, complexing, enzymatic debranching treating and
drum drying are combined to be applied to the production process of the yam bean
dietary fiber powder, the dissolving ability of the yam bean powder can be effectively improved, the fluidity and
solubility are improved, the content of the resistance
starch in the product is increased, and the significant effects on regulating the intestinal microecological balance and improving the
gastrointestinal function are achieved; in addition, powder granules produced through
extrusion granulating are uniform in granule size, loosened and porous and can be swelled and gelatinized in a short time, and therefore the good instant
solubility and wet permeability are achieved.