Effect of Forest Biomass Pretreatment on Essential Oil Yield and Properties

Abstract

Essential oils (EOs) are natural and economically valuable aromatic compounds obtained from a variety of crops and trees, including forest trees, which have different therapeutic and biological activities. This project aims to assess the impact of different residual forest biomass pretreatments on the yield and the properties of EOs, including their antibacterial and antioxidant characteristics. Forest biomass from black spruce (BS, Picea mariana Mill.), balsam fir (BF, Abies balsamea), and jack pine (JP, Pinus banksiana Lamb.) was processed mechanically by (i) shredding, (ii) grinding, (iii) pelletizing, and (iv) bundling. EOs were then extracted by hydro- and steam distillation. The densification into bundles was found to improve EOs yield compared to the other residual forest biomass pretreatments. For example, the yield of bundled BF was improved by 68%, 83%, and 93% compared to shredded, ground, and granulated biomass, respectively. The highest yield was obtained when densification into bundles was combined with extraction through hydrodistillation. As for EOs’ chemical composition, JP had the highest polyphenol content and consequently the greatest antioxidant activity. EOs derived from BS inhibited the growth of Gram-positive Staphylococcus aureus bacteria and Gram-negative Salmonella typhimurium and Escherichia coli bacteria. The densification of forest biomass into bundles did not affect the antioxidant capacity or the antibacterial activity of EOs, thereby preserving both properties. Thus, the pretreatment of forest biomass residue could have an impact on the volume and the transport costs and therefore improve the bioproducts market and the bioeconomy in Canada.

Sifat Antimikroba dan Pengaruh Perlakuan Bahan Baku terhadap Rendemen Minyak Sereh Wangi (Antimicrobial Properties and Effects of Raw Material Treatments on Citronella Oil Yield)

“…Alam et al (2018) mengemukakan distilasi daun sereh dengan ukuran 15 cm dan volume bed 40% menghasilkan rendemen minyak maksimum yaitu 1,95%. Hal yang sama dikemukakan oleh Hmaied et al (2019) bahwa pengecilan ukuran sampel akan mempengaruhi rendemen minyak atsiri. Penelitian pengaruh ukuran bahan baku dan lama penyimpanan terhadap rendemen minyak sereh wangi merupakan hal penting yang perlu dilakukan untuk mengetahui kondisi operasional distilasi terbaik dalam menghasilkan minyak sereh wangi.…”

Therapeutic and Biomedical Potentialities of Terpenoids – A Review

“…Kekule defined a mixture of carbon, hydrogen, and oxygen extracted from plant essential oil that has a formula (C 5 H 8 ) 2 remain in a liquid state at minimum heat value and identified as terpenoids due to their identification terpenes oils. Mixes with the sub-atomic equations (C 5 H 8 O) 2 or (C 5 H 7 O) 2 containing liquor or a ketone individually and could be solidified or hastened as defined them as camphor's 12 . Wallach and his colleagues were able to identify oil components with the help of fractional and vacuum distillation.…”

Use of Post-Extraction Fir Wood Greenery Residues by the Bioconversion Method with the Production of Feed Additives

“…Fir wood greenery contains a set of substances notable for their high biological activity. On an industrial scale, it is traditionally used to extract essential oils [18][19][20]. Various extracts containing a wide range of chemical compounds are obtained from fir wood greenery: from organic acids and microelements to flavonoid compounds and polyphenol complexes [13,[21][22][23][24][25][26].…”