The study was conducted to develop a method for processing Helix snail fillet production waste to create a feed additive. Two processing methods were compared: boiling (100°C, 40 min, 786 pcs., n = 2) and freezing (–25°C, 712 pcs., n = 2). Additionally, the frozen waste was separated into solid and liquid fractions and used separately and in combination with determination of the chemical and amino acid composition. Boiling resulted in an increase in the crude protein content of the additive (74.9 versus 60.5% during freezing). Freezing contributed to an increase in the crude ash content (18.5 versus 8.9% during boiling) and was more efficient from a technological point of view, since it involved fewer technological stages. When analyzing the fractions of frozen waste, the content of crude protein in the solid and combined fractions was almost the same (about 56.6%), and 2% lower in the liquid fraction. The liquid fraction was characterized by a low content of crude fat (0.63%), while in the solid fraction its concentration reached 12.95%. The content of crude fiber was insignificant, and in the liquid fraction it was absent. The highest content of crude ash was observed in the combined fraction (12.29%), where it was 2.2 times higher than in the liquid one. Nitrogen-free extractive substances predominated in the liquid fraction (39.3%). The content of individual amino acids in the fractions differed insignificantly. An experiment on the use of waste in feeding broiler chickens of the Cobb-500 cross (control group, I and II experimental groups with the introduction of a feed additive in the amount of 1.0% and 5.0%, respectively) showed an increase in live weight by 5% by the 45th day when using a feed additive in the amount of 5.0%, compared with the control group.
Golembovskii et al. (Wed,) studied this question.