Extrusion of Rice and Aronia melanocarpa Pomace: Physical and Functional Characteristics of Extrudates
Source abstract
Abstract
In this study, black chokeberry (Aronia melanocarpa) juice pomace was used to enrich the extrudates from rice in order to create a functional food. A response surface methodology was applied to optimize the physical (expansion ratio, bulk density, moisture content, hardness, pellet durability index, and color) and functional (water solubility index, water absorption index) characteristics of the extrudates. A laboratory single-screw extruder was used to produce the extrudates and a full factorial experimental design was applied (N = 32) to present the effect of the amount of chokeberry pomace (10 and 20%), the feed moisture content (14 and 20%) and the working screw speed (180 min−1 and 220 min−1) of the extruder on the physical and functional characteristics. The results showed that the three factors influenced all studied characteristics. An exception with statistically insignificant effect was the amount of chokeberry pomace on the expansion ratio, pellet durability index, water adsorption index, lightness, redness, and yellowness, the feed moisture content on the water solubility, water adsorption index, redness and yellowness, and the working screw speed on the bulk density and hardness.
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Research context
OpenAlex topics: Food composition and properties · Polysaccharides Composition and Applications · Food Quality and Safety Studies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Process Engineering, Technical Faculty, University of Food Technologies, 4002 Plovdiv, Bulgaria
Department of Machines and Apparatuses for Food Industry, Technical Faculty, University of Food Technologies, 4002 Plovdiv, Bulgaria
Department of Technology of Cereals, Feed, Bakery and Confectionery Products, Technological Faculty, University of Food Technologies, 4002 Plovdiv, Bulgaria
Institute of Food Preservation and Quality, Agricultural Academy, 4003 Plovdiv, Bulgaria
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