BIOCONVERSION AS A METHOD OF UTILIZATION OF POST-EXTRACTION RESIDUES OF FIR TREE GREENS (ABIES SIBIRICA) WITH OBTAINING A FEED ADDITIVE

Abstract

This article deals with the problem of utilization of the solid residue of fir tree greens formed during the industrial production of essential oils. The objective of this study was to study the chemical composition of bioconversion products of substrates based on fir tree greens. The strain PP-3.2. Pleurotus pulmonarius (Fr.) Quél acted as a biodestructor. In the process of bioconversion, the content of polysaccharides and lignin substances decreases to 38 and 28%, respectively. Up to 20% of protein accumulates in the bioconversion products of fir tree greens. The amount of nucleic acids is no more than 1.5 g per 1 kg, the content of heavy metals does not exceed the maximum permissible concentration. The decrease in the mass of the substrate reaches 15%. When the fallen leaves and the post-extraction residue of poplar buds are added to the substrate, the protein content increases by 3%, and the substrate-destroying activity of fungi also increases. The digestibility of products as a result of bioconversion increases by 1.6-2.8 times, depending on the composition of the substrate. The obtained data allow us to recommend post-fermented substrates based on fir tree greens and balsamic poplar biomass for use as a protein feed additive.