DefinePK

Abstract

In the food industry, the secondary raw material, such as blood, is obtained as a result of processing animal carcasses. This work has been aimed at developing a low-temperature technology for processing the blood of slaughtered animals. From such blood, the hemoglobin solution has been obtained by osmotic hemolysis. Next, separation freezing has been performed on a laboratory capacitive cry concentrator. The freezing experiments have been performed at various temperatures of the heat exchange surface and with various initial mass fractions of the solids. The highest efficiency of freezing has been observed with the temperature of the heat exchange surface of minus 2 ± 0.2 °C. Equations have been made for calculating the thermophysical properties of the hemoglobin solutions with various concentrations. A method of two-stage freezing of the hemoglobin solution has been developed. The expediency of the product sublimational dehydration with a layer thickness of 10 ± 1 mm has been proven. A technology has been developed for producing purified hemoglobin in the liquid, concentrated, and dry form.