An eco-friendly technology for polysaccharide production from logging and sawing waste

Abstract

A polysaccharide recovery technology was developed with intent to be used in integrated processing of larch biomass waste into practically significant arabinogalactan, pectin, and crystalline glucose suitable for medicinal, food-industry, and agricultural applications. Theoretical aspects were considered for arabinogalactan extraction from larch wood, in which procedure some of individual stages and the entire process cycle of arabinogalactan recovery on a pilot installation were optimized. The possibility of saccharification of larch wood-derived lignocellulosic residue into crystalline glucose was demonstrated. The results of a technological study on pectin polysaccharide isolation from larch bark were reported along with the findings concerning the membrane tropic activity of pectin and ability to form nanobiocomposites via interaction with transition and noble metal ions.This study is dedicated to utilization of waste resulted from larch wood processing into building materials. In the existing methods used for wood processing into forest products, ca. 40% of this valuable raw material (bark, slab, sawdust) go to waste which is either burned or dumped. At the same time, the use of an integrated larch wood biomass processing scheme allows obtaining valuable products intended for medicinal, food-industry, and agricultural applications [1,2]. At the present time, a commercial-scale technology for production of dihydroquercetin (flavonoid) from larch wood is being implemented with a view to further use of this pharmacological substance for preparation of diquertin (a pharmaceutical product), as well as of numerous bioactive food additives thereof [3]. Also, an economically viable and practically feasible technology of isolation of water-soluble polysaccharide arabinogalactan dominating in larch wood is currently under development [4]. Further, an integrated wood processing scheme allows utilization of lignocellulosic residue, a larch wood waste, into carbohydrate products, primarily, crystalline glucose [5].A very rich source of biologically active compounds, in particular, of pectin polysaccharide, can be found in larch bark. Previously we proposed a scheme for larch bark processing into practically valuable products: wax, antioxidant complex [6], pectin, and sorbents.Here, we present a technology for isolation of arabinogalactan from wood and also briefly discuss the basic aspects of the technology for preparation of crystalline glucose from larch wood lignocellulosic residue and of pectinaceous polysaccharides from larch bark.The arabinogalactan content in larch wood may reach 15-20%; most enriched in arabinogalactan is the basis of tree (which goes to wood processing waste) [7][8][9].Arabinogalactan exhibits a broad spectrum of biological activity which, combined with high membrane tropic activity and dispersive ability, offer wide prospects for medicinal and veterinary, as well as for food-and cosmetic-industry applications [10]. Membrane tropic activity of arabinogalactan (due to the galactose moieties in it...

Green and Sustainable Separation of Natural Products from Agro-Industrial Waste: Challenges, Potentialities, and Perspectives on Emerging Approaches

“…Other potential scalable approaches have been described, such as enzymatic [107][108][109][110][111][112][113][114], alkaline [115][116][117][118][119][120] and based on different types of aqueous media (e.g., cyclodextrins, montmorillonite K-10/LiOH, green liquor) [121][122][123][124][125][126][127][128][129][130]; ionic liquids [131][132][133][134][135], deep eutectic solvents [136][137][138], constituting alternative methods for the recovery of high added-value compounds from agro-industrial waste aiming at obtaining the best analytical, economical and socio-environmental compromise [139][140][141][142].…”

Catalytic oxidation of rare sugars over gold catalysts

“…9,10 The hemicelluloses are also released during the mechanical and chemical pulping processes and can be recovered on an industrial scale. 57,58 It is, therefore, a sustainable feedstock for valuable chemicals. Hydrolysis of hemicelluloses to its monosaccharides in the presence of acidic homogeneous and heterogeneous catalysts in high yields without further degradation has been recently reported.…”