Recovery of Calcium Phosphate from Ultrafiltration Permeates

Abstract

Phosphate was precipitated preferentially from ultrafiltration permeate of whole milk without affecting the lactose concentration in the permeate. Precipitates formed by addition of up to .090 molal calcium in the form of calcium chloride, calcium hydroxide, and calcium oxide resulted in removal of approximately 80% of the phosphate in the permeate. Removal of phosphate with all calcium salts increased as pH was raised to 8 with little increase above pH 8. There was no significant difference among weights of precipitates produced by calcium chloride, calcium hydroxide, or calcium oxide at equivalent pH's. © 1982, American Dairy Science Association. All rights reserved.