Patent ID: 8247012

Claim:
A method, comprising providing whole cow milk to a first intermediate tank; transferring the whole cow milk from the first intermediate tank to a heater to heat the whole cow milk at a temperature of not more than 5°-58° C.; transferring the heated milk to a separator to separate skimmed milk and milk fat; transferring the skimmed milk to a second intermediate tank; transferring the skimmed milk from the second intermediate tank to a plate pasteurizer where the skimmed milk is stored for from 15 to 75 seconds at the temperature of from 50 to 87° C.; transferring the skimmed milk from the plate pasteurizer to a plate cooler where the skimmed milk is cooled to from 4 to 10° C.; transferring the skimmed milk from the plate cooler to an intermediate balance tank; transferring the skimmed milk from the intermediate balance tank to a protein membrane microfiltering and fractionating filter to separate a retentate comprising casein protein and a permeate comprising whey protein; transferring the retentate comprising casein protein to a third intermediate tank; and transferring the retentate comprising casein protein from the third intermediate tank to a membrane ultrafiltration-diafiltration filter to obtain a retentate comprising a water-soluble casein protein with a solids content of from 14 to 36%; wherein the method is performed without acid, alkali, rennet or other chemical substances.