Assessment of Agroforestry Residues: Their Potential within the Biorefinery Context

M C Gaspar,S R Pinela,M E M Braga,M J Quina,A T Portugal,M G V S Carvalho,R Moreira,C V T Mendes

doi:10.1021/acssuschemeng.9b03532

M C Gaspar, S R Pinela + Show 6 more

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https://doi.org/10.1021/acssuschemeng.9b03532

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Abstract

The concept of bioeconomy has been promoted worldwide in order to replace fossil-based resources and to find new strategies for waste management, by converting biomass into energy, chemicals, and value-added products, in a sustainable way. Despite the efforts that have been made in this area, there are still some unexplored raw materials globally, namely from agricultural and forestry industries. Therefore, the aim of this work was to characterize four abundant residues from the Portuguese agroforestry industry, including pruning residues (pine branches, PB) and stumps (PS), tomato waste (TW), and winery wastewater (WW), for analyzing their potential within the biorefinery context. Volatiles were analyzed by gas-chromatography, and compounds with repellent/attractant properties were found for PB and PS, while flavor-enhancers were particularly identified in agrowastes. Composition analysis revealed that both TW and WW had the potential for biogas generation (BMP ∼340 and ∼250 NL CH4/kg VS, respectively), ...

Highlights

The biorefinery concept is nowadays an essential strategy to convert biomass residues into value-added products and energy.[1]
Volatiles emitted by PB, PS, tomato waste (TW), and WW, identified and semiquantified by the SPME-GC/MS
Most of them are composed of 10 carbons, such as some monoterpenes (camphene, α-pinene, β-myrcene, limonene, and β-(E)

Summary

■ INTRODUCTION

The biorefinery concept is nowadays an essential strategy to convert biomass residues into value-added products and energy.[1]. Government to promote a sustainable use of renewable resources and to take advantage of readily available residues from residual and natural biomass sources.[6] In this context, it is important to identify and to characterize accessible residues, not explored until now, and to assess their potential to produce innovative value-added products. Primary forestry residues include logging residues, stumps, and early thinning (e.g., branches), while secondary residues correspond to those from the wood processing.[1] These wastes (e.g., from wood and bark) have adequate heating value to produce thermal energy, and hemicelluloses and lignin content make this type of materials suitable for obtaining second-generation biofuels, such as biogas and bioethanol.[7] Cellulose and hemicelluloses can be used in food, textile, paper, petroleum, and mining industries,[8] among others.

Research Article

Compositional analysis

■ ACKNOWLEDGMENTS

■ REFERENCES