DEVELOPMENT OF FUNCTIONAL INGREDIENTS USING BYPRODUCTS FROM AGRO-INDUSTRIAL PROCESS

Overview

This research addresses the valorization of agro-industrial byproducts from fruit and vegetable processing—specifically Brassicaceae, legumes, and tomatoes—into functional food ingredients. The work addresses concurrent challenges of byproduct management burden and food waste while targeting sustainable food production and consumption objectives. Two primary development pathways were pursued: formulation of baked goods (biscuits, muffins, bread) incorporating vegetable byproduct powders and extracts with comprehensive rheological, nutritional, and sensory characterization; and lactic acid fermentation as a processing strategy to generate functional ingredient precursors.

Methods and approach

Broccoli byproducts were processed into whole-plant powders and hydroethanolic extracts enriched in glucosinolates, polyphenols, carotenoids, and tocopherols, subsequently incorporated into biscuit formulations. Cauliflower and tomato byproducts were combined in savory muffin development. Legume byproducts—specifically peas and borlotti beans—were evaluated as wheat flour substitutes in bread formulations at defined substitution rates. Lactic acid bacteria (LAB) fermentation of the aforementioned matrices was conducted using strain-specific selections to generate bioactive profiles. Physicochemical, nutritional, and sensory analyses were performed on all final products.

Results

Whole broccoli powder at 10% incorporation yielded optimal biscuit formulations regarding dough workability and bioactive retention (glucosinolates, phenolic compounds, lutein, beta-carotene). Cauliflower (20%) combined with tomato (30%) produced muffins with enhanced nutritional properties—notably vitamins A and E content—demonstrating consumer acceptability. Pea (10%) and borlotti bean (15%) flour substitutions produced bread of superior quality with improved nutritional profiles including elevated protein and phenolic compound content. Lactic acid fermentation outcomes demonstrated microorganism-dependent phytochemical profile variation, indicating critical strain selection for desired functional outcomes.

Implications

The research demonstrates that integrated, multidisciplinary approaches effectively support innovation in agro-industrial byproduct application within food formulation contexts. Byproduct-derived ingredients exhibit substantial potential for nutritional enhancement of conventional staple foods with minimal sensory compromise. The strain-dependent fermentation outcomes indicate that LAB-mediated processing represents a viable mechanism for phytochemical modification and potential bioactivity enhancement, though further bioactivity assessment and process optimization at industrial scale remain necessary prerequisites for functional food development.