Biotechnological Processing of Cashew Apple By-Products
Summary
Cashew apples, the swollen peduncles of the cashew nut, represent a substantial agro-industrial by-product that is often underutilised or discarded. Biotechnological processing seeks to valorise these pseudofruits through a suite of techniques that convert waste streams into value-added ingredients and functional products. Central to this endeavour are methods for gentle extraction and preservation of bioactive compounds such as polyphenols, flavonoids and vitamin C, alongside the removal of astringent tannins. Nonthermal technologies—including membrane filtration, high-pressure processing and enzymatic treatments—have been shown to retain nutritional and sensory qualities more effectively than conventional heat pasteurisation. Fermentation platforms employing yeasts, bacteria or mixed cultures have unlocked routes to organic acids, single-cell proteins, natural colourants and even bioethanol, embedding cashew apple valorisation within circular-economy frameworks. Integrated bioprocessing chains combine clarification, concentration and downstream fermentation to deliver purified antioxidants, prebiotic fibres and flavour enhancers suitable for food, feed and cosmetic applications. Global research efforts emphasise scalable, low-energy interventions that align with sustainable development goals by transforming a high-moisture, perishable waste into economically and environmentally valuable commodities.
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Biotechnological Processing of Cashew Apple By-Products publication trend
The graph below shows the total number of articles in biotechnological processing of cashew apple by-products across all publications each year (not limited to Nature Index journals).
Technical terms
Pseudofruit: The swollen, edible stalk that supports the cashew nut, rich in sugars and bioactive compounds.
Clarification: A fining process to remove suspended solids and astringent compounds from juice using agents such as gelatin.
Nonthermal processing: Preservation techniques that avoid high temperatures to maintain nutritional and sensory qualities.
Polyphenols: A class of plant secondary metabolites with antioxidant and health-promoting properties.
Fermentation: Microbial conversion of sugars into acids, alcohols or other metabolites under controlled conditions.
References
- The Cashew Pseudofruit (Anacardium occidentale): Composition, Processing Effects on Bioactive Compounds and Potential Benefits for Human Health. Foods (2024).
- Effect of clarification on physicochemical properties and nutrient retention of pressed and blended cashew apple juice. Food Science & Nutrition (2023).
- Cashew Apples in Ghana: Stakeholders’ Knowledge, Perception, and Utilization. International Journal of Food Science (2022).
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