Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Utilisation of Post-extraction Fir Wood Greenery Residues by the Bioconversion Method with the Production of Feed Additives

Version 1 : Received: 26 January 2021 / Approved: 27 January 2021 / Online: 27 January 2021 (16:05:16 CET)

A peer-reviewed article of this Preprint also exists.

Mamaeva, O.O.; Isaeva, E.V. Use of Post-Extraction Fir Wood Greenery Residues by the Bioconversion Method with the Production of Feed Additives. Forests 2021, 12, 272. Mamaeva, O.O.; Isaeva, E.V. Use of Post-Extraction Fir Wood Greenery Residues by the Bioconversion Method with the Production of Feed Additives. Forests 2021, 12, 272.

Journal reference: Forests 2021, 12, 272
DOI: 10.3390/f12030272

Abstract

The effectiveness of forest resources depends on the comprehensiveness and rationality of their consumption and processing into finished products. This article discusses a problem of utilising solid fir wood greenery residues generated during the industrial production of essential oils. Bioconversion is considered to be the most promising utilization method. The objective of this research was to study the chemical composition of bioconversion products of fir wood greenery-based substrates. The РР-3.2 strain of Pleurotus pulmonarius (Fr.) Quél was used as a biodestructor. In the process of bioconversion, the contents of polysaccharides and lignin substances is reduced to 38 and 28 % respectively. Up to 20 % of protein accumulates in bioconversion products of fir wood greenery. The amount of nucleic acids is not more than 1.5 g per 1 kg, the contents of heavy metals, such as mercury, cadmium, arsenic, lead, do not exceed maximum permissible concentration standards. The substrate weight loss reaches 15 %. When fallen leaves and post-extraction poplar bud residues are added to the substrate, the substrate-destroying activity of fungi rises, as well as the protein content increases by 3 %. The digestibility of products as a result of bioconversion increases 1.6–2.8 times depending on the substrate composition. The obtained data enable to recommend post-fermented substrates based on fir wood greenery and balsam poplar biomass for use as a protein feed additive.

Keywords

post-extraction residues; fir wood greenery; bioconversion; protein feed additive; Pleurotus pulmonarius; chemical composition

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