The invention belongs to the technical field of natural
pigment extraction and purification and provides a method for extracting and purifying
anthocyanin from chokeberry residues. The method for extracting and purifying the
anthocyanin from the chokeberry residues is aimed at solving problems existing in the prior art of chokeberry juice preparation and
anthocyanin extraction. The method comprises, after chokeberry is washed, removing acrid taste of the chokeberry through artificially electrolyzed acid reductive water,
tannase and
chitosan,
processing the chokeberry residues as well as extracting the anthocyanin through the electrolyzed acid reductive water, stirring in acidic electrolyzed oxidizing water, soaking and separating out the chokeberry residues for
precipitation, filtering andmembrane-filtering anthocyanin
aqueous solution for multiple times for repeated extraction until extracting solution is colorless or light-
colored, combining extracting solution and performing concentration and
drying processes to obtain extractives; absorbing, eluting and concentrating filtering liquor to obtain paste anthocyanin; preparing
solid anthocyanin through conventional methods; preparing feedstuff and fertilizers with waste residues. The method for extracting and purifying the anthocyanin from the chokeberry residues is simple and easy to industrialize, reduces consumption of
chemical agent and water, improves the yield of products, achieves comprehensive utilization of the chokeberry and increases the value added as well as
economic benefits,
social benefits and environmentalprotection benefits.