Upgraded technology of producing hydrolysates from by-products of velvet antler husbandry

The task was to upgrade the technology of producing the hydrolysates from by-products of velvet antler deer husbandry. As the material for this research work used maral meat and tails were used. To obtain hydrolysates, “Volna” device, model UZTA-0.2/22-OM, (average volume power: 0.1 W/cm3) in a high-intensity ultrasonic effect compared to the previously used ElmasonicS80H device (average volume power: 0.02 W/cm3) was used The set extraction parameters were as follows: the temperature was 45, 55, 65 and 75 °C; the periods of time were 1, 2, 3, 4, 5 and 6 hours; the hydromodule was 1:6; during the first half of the time 0.5 % of Protozymes B and C were added at pH=8.0, and the remaining 0.5 % Protozyme LP was added at pH=4.0. The effectiveness of ultrasonic extraction was assessed in the terms of the yield of biologically active substances, the amount of solids and microbiological indicators in the set technological parameters. According to the results of the study, it was found that using both ultrasonic devices one can obtain 93.0 and 98.2 % of dry substances from maral by-products (meat and tails), respectively. Besides, it was found that in case of using a high-intensity ultrasonic device, the extraction time reduced by 2-4 hours. The dynamics of changes in the solid content depending on the temperature were identical during extraction with both devices; for instance, at the temperature of 75 °C the amount of solids was 13.4-15.7 % higher than that at 45 °C. The high-intensity ultrasonic device produced an extract from meat and tails conforming to TR CU 021/2011 in terms of its microbiological indicators after 2 hours of processing at the temperature of 65-75 °C. Thus, the extraction with a high-intensity ultrasonic device allows obtaining hydrolysates with high dry matter content, reducing the time required for such a processing.