Biorefinery Approaches for Olive Biomass Valorization

Biorefinery approaches for olive biomass valorisation address the conversion of lignocellulosic residues from olive cultivation and processing into fuels, chemicals and materials. Olive trees generate diverse residues—prunings, leaves, stones and pomace—rich in cellulose, hemicellulose and phenolic compounds. Integrated biorefineries combine physical, chemical and biological routes to fractionate these streams, enabling sequential production of fermentable sugars, bioethanol and high-value co-products such as antioxidants, oligosaccharides or bio-based chemicals. Key steps include tailored pretreatments (acid, alkaline, hydrothermal or biological) to overcome biomass recalcitrance; enzymatic hydrolysis to depolymerise polysaccharides; and microbial fermentation or catalytic upgrading. Process optimisation, informed by response surface methodologies and advanced modelling, maximises sugar yields and energy efficiency while minimising inhibitors. Geographic and logistical analyses support the strategic siting of facilities near olive-producing regions, reducing transport costs and environmental impact. This field has evolved to embrace circularity principles, valorising agro-industrial waste within a sustainable bioeconomy, with particular relevance to Mediterranean and other olive-growing regions worldwide.

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Biorefinery Approaches for Olive Biomass Valorization publication trend

The graph below shows the total number of articles in biorefinery approaches for olive biomass valorization across all publications each year (not limited to Nature Index journals).

Technical terms

Lignocellulosic biomass: Plant material composed of cellulose, hemicellulose and lignin.

Pretreatment: Physico-chemical process to disrupt biomass structure and improve enzyme accessibility.

Enzymatic hydrolysis: Enzyme-catalysed breakdown of polysaccharides into fermentable sugars.

Autohydrolysis: Hydrothermal treatment using only water to solubilise hemicellulose fractions.

Response surface methodology: Statistical approach for optimising process variables in experimental design.

References

1. Residual biomass potential in olive tree cultivation and olive oil industry in Spain: valorization proposal in a biorefinery context. Spanish Journal of Agricultural Research (2017).
2. Optimization of Autohydrolysis of Olive Pomaces to Obtain Bioactive Oligosaccharides: The Effect of Cultivar and Fruit Ripening. Catalysts (2022).
3. Location of Biorefineries Based on Olive-Derived Biomass in Andalusia, Spain. Energies (2021).
4. Increase in Fermentable Sugars of Olive Tree Pruning Biomass for Bioethanol Production: Application of an Experimental Design for Optimization of Alkaline Pretreatment. Periodica Polytechnica Chemical Engineering (2022).