The invention discloses a
selenium-enriched purple sweet potato vermicelli
processing technology. The
selenium-enriched purple sweet potato vermicelli
processing technology comprises the following steps of cleaning up purple sweet potatoes, draining, beating the drained purple sweet potatoes into purple sweet potato paste, carrying out clear water leaching orderly by a coarse bamboo basket and a fine bamboo basket to obtain purple sweet
potato starch, collecting purple sweet
potato starch precipitates after the purple sweet
potato starch is precipitated,
drying by an
air dryer to obtain dry purple sweet potato
starch, adding 0.25kg of edible
alum into each 50kg of the dry purple sweet potato
starch, mixing water and the dry purple sweet potato
starch with edible
alum, kneading the mixture into a purple sweet potato starch dough, heating water to a temperature of 100 DEG C, pressing the purple sweet potato starch dough into a fine wire which is the
selenium-enriched purple sweet potato vermicelli by a
machine, putting the selenium-enriched purple sweet potato vermicelli into water having a temperature of 100 DEG C, taking out the selenium-enriched purple sweet potato vermicelli after the selenium-enriched purple sweet potato vermicelli floats, immersing the selenium-enriched purple sweet potato vermicelli in cold water, refrigerating the selenium-enriched purple sweet potato vermicelli by a refrigeratory, immersing the selenium-enriched purple sweet potato vermicelli which is refrigerated completely and freezes into
warm water, taking out the thawy selenium-enriched purple sweet potato vermicelli,
drying in air, and packaging the selenium-enriched purple sweet potato vermicelli dried in air. The selenium-enriched purple sweet potato vermicelli
processing technology well retains nutrients and a
flavor of purple sweet potatoes.