Patent ID: 9578889
Date: 2017-02-28
CPC Classifications: A23J,A23K,A23L

Claim:
1. A preparation method for low-ash poultry plasma protein powder, comprising: (a) mixing poultry blood with an anticoagulant and obtaining an anti-coagulated whole blood; (b) centrifuging the anti-coagulated whole blood obtained in step (a) and collecting a light liquid to obtain a plasma liquid; (c) adding a decalcifying agent into the plasma reaction liquid obtained in step (b), and conducing precipitation reaction, so as to obtain a plasma reaction liquid containing a precipitate wherein the decalcifying agent contains a water-soluble carbonate, and the amount of the decalcifying agent being 0.01-0.5% (w/w) of the plasma liquid obtained in step (b); (d) removing the precipitate by centrifuging the plasma reaction liquid obtained in step (c), so as to obtain a decalcified plasma liquid; (e) ultra-filtering the decalcified plasma liquid obtained in step (d) using an ultrafiltration membrane, so as to obtain an ultrafiltration-processed plasma liquid, wherein the ultrafiltration membrane being an ultrafiltration membrane with a molecular weight cut-off of 300,000-500,000 Dalton; (f) adding an emulsifier to the ultrafiltration-processed plasma liquid obtained in step (e), so as to obtain an emulsified plasma liquid, wherein the amount of the emulsifier being 0.01-0.5% (w/w) of the ultrafiltration-processed plasma liquid obtained in step (e); and the emulsifier contains at least one selected from the group consisting of fatty acid monoglyceride, sorbitol ester, and soybean phospholipid; (g) subjecting the emulsified plasma liquid obtained in step (f) to nanofiltration to obtain a plasma concentrate and a filtrate, wherein the nanofiltration being performed using a nanofiltration membrane with a molecular weight cut-off of 200-1000 Dalton, the volume ratio of the plasma concentrate over the filtrate being 1: 2-4, and collecting the plasma concentrate; and (h) drying the plasma concentrate obtained in step (g), so as to obtain a poultry plasma protein powder.