Valorization of Food Processing By-Products
Summary
Food processing by-products, encompassing peels, pomace, seeds and pulps from fruit, vegetable, cereal and root tuber industries, are increasingly recognised as valuable sources of dietary fibres, polyphenols, pigments, proteins and other bioactive compounds. Valorisation strategies aim to convert these residual streams into functional ingredients for food, feed, pharmaceutical and cosmetic applications, thereby reducing environmental burdens and contributing to circular economy objectives. A range of pretreatments and extraction techniques—including high-pressure processing, subcritical water extraction, ultrasonication and fermentation—have been optimised to maximise recovery yields and preserve compound stability. Furthermore, advanced drying (freeze-drying, hot-air, microwave) and encapsulation approaches enhance shelf life and bioavailability of sensitive constituents. Collectively these efforts underscore a shift from linear waste disposal towards integrated biorefinery models that align resource efficiency with socio-economic benefits, such as novel natural colourants, prebiotic fibres, antioxidant formulations and biodegradable packaging materials. This field exemplifies the intersection of sustainability imperatives and technological innovation, supporting food security and waste-to-wealth initiatives on a global scale.
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Valorization of Food Processing By-Products publication trend
The graph below shows the total number of articles in valorization of food processing by-products across all publications each year (not limited to Nature Index journals).
Technical terms
Valorisation: The process of converting by-products and waste streams into value-added materials or compounds.
Circular economy: An economic model focused on resource efficiency, recycling and reuse to minimise waste and environmental impact.
Bioactive compounds: Molecules in food by-products that exert beneficial physiological effects, such as antioxidants or prebiotics.
Hydrocolloids: Water-soluble polysaccharides that form gels or viscous solutions and stabilise food structures.
Prebiotic: A non-digestible food component that selectively stimulates the growth or activity of beneficial gut microorganisms.
References
- The Potential of Selected Agri-Food Loss and Waste to Contribute to a Circular Economy: Applications in the Food, Cosmetic and Pharmaceutical Industries. Molecules (2021).
- Innovative Technologies for Extraction and Microencapsulation of Bioactives from Plant-Based Food Waste and Their Applications in Functional Food Development. Foods (2021).
- By-Products as Sustainable Source of Bioactive Compounds for Potential Application in the Field of Food and New Materials for Packaging Development. Food and Bioprocess Technology (2023).
- In vitro fermentation characteristics of fruit and vegetable juicing wastes using human fecal inoculum are determined by cell wall architecture. Food Hydrocolloids (2024).
- Transformation of carrots into novel food ingredients and innovative healthy foods. Applied Food Research (2023).
- Sustainable Food Systems in Fruits and Vegetables Food Supply Chains. Frontiers in Nutrition (2022).
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