Justification of Formulation Components and Determination of Spray Drying Parameters in Obtaining Feed Vitamin A/D3

Abstract

The work describes the development of formulations and optimization of spray drying technology for the production of protected feed vitamin A/D₃ for cattle. The emulsion optimal flow rate to the nozzle for analysed samples № 1, № 4, № 5, and № 6 was 15, 10, 5, and 30 mL/min, respectively. Samples № 2 and № 3 did not match with the requirements because of large size and they were not studied. Particles with sizes ranging from 200 to 700 μm were obtained. It was found that the optimal temperature of incoming air for samples № 1, № 4, № 5, and № 6 ranges from 70 °C to 80 °C. At the same time, the moisture content of the resulting granules did not exceed 8%. The optimal pressure of the pneumatic sprayer during the production of samples № 1, № 4, and № 6 was 0.08 MPa, for sample № 5 the optimal pressure was 0.05 MPa. The concentration of active substances (vitamins A and D₃) of samples № 1, № 4, and № 5 based on gelatin, apple pectin and agar-agar corresponded to the declared ones (A/D₃ 1000/200 thousand IU/g, no less). The granules were insoluble in hot water and were recommended for the feed rations development.