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Sustainable uses of cashew tree rejects: cashew apple bagasse and cashew gum

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Abstract

Anacardium occidentale, more commonly known as cashew tree, is a tropical tree native from South America. The industrial use of the cashew is basically aimed at the processing of the nut and, minor extent, the use of the peduncle, generating high losses due to the large quantity of cashew apple bagasse that are discarded. Another cashew’s tree reject is the exudate, a yellowish-colored resin obtained by natural exudation or by incisions made on the stem of the cashew, which serves as raw material for the cashew gum production. In this context, the present work carries out a technological prospection in databases of patents and scientific articles mapping the cashew’s rejects applications, such as cashew apple bagasse and cashew gum as a byproduct. After the analysis of patents and scientific articles, it was possible to perceive that cashew apple bagasse presents a good potential, as an abundant and low-cost source of bioactive compounds, being an excellent raw material for functional food composition. In particular, many studies involving the cashew gum are in the area of medicine. Thus, the present study mapped the potentiality of the cashew rejects that can add environmental and social dimensions that are often overlooked in the context of small-scale agricultural production.

Statement of novelty

This work identified the potential in agroindustrial cashew rejects in order to develop new sustainable perspectives for its use. Sustainable alternatives were also identified in the cashew production chain and new applications for the use of cashew apple bagasse and cashew exudate.

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Acknowledgements

The authors would like to thank the Brazilian Council for Scientific and Technological Development (CNPq), the Federal Agency for Support and Evaluation of Graduate Studies (CAPES) for financial support.

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  1. Department of Organic Processes, School of Chemistry, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil

    Nathalia N. Oliveira, Cheila G. Mothé & Michelle G. Mothé

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  1. Nathalia N. Oliveira
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  2. Cheila G. Mothé
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  3. Michelle G. Mothé
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Correspondence to Nathalia N. Oliveira.

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Oliveira, N.N., Mothé, C.G. & Mothé, M.G. Sustainable uses of cashew tree rejects: cashew apple bagasse and cashew gum. Biomass Conv. Bioref. 12, 2623–2630 (2022). https://doi.org/10.1007/s13399-020-00763-5

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