Evaluation of the Chemical Composition and Antioxidant Capacity of Dried Orange Pulp

Eddour, Ahmed Readh Chaib and Litim, Miloud and Bouderoua, Kaddour (2025) Evaluation of the Chemical Composition and Antioxidant Capacity of Dried Orange Pulp. World's Veterinary Journal. 997 - 1006. ISSN 2322-4568

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Abstract

The disposal of orange juice by-products presents an environmental challenge due to their high volume and accumulation in landfills. Valorizing these residues supports the development of a circular economy within the agro-industrial sector, offering both environmental and economic benefits. This study aimed to valorize orange juice processing residues by producing a dried orange pulp (DOP) flour and characterizing its physicochemical and phytochemical properties to assess its potential suitability as a sustainable feed ingredient for broiler chickens. The physicochemical properties of the sun-dried and finely milled orange by-products (<1 mm) were analyzed using standard methods, including proximate composition analysis (moisture, ash, crude protein, crude cellulose), and spectrophotometric assays for phytochemicals (total phenolics, flavonoids, condensed tannins) and antioxidant activity 2,2-Diphenyl-1-picrylhydrazyl (DPPH), Ferric Reducing Antioxidant Power (FRAP). The DOP demonstrated high levels of dietary cellulose (89.19% Dry Matter), ash (3.81% Dry Matter), total phenolics (202.59 ± 15.93 mg Gallic Acids Equivalent/100 g DM), total flavonoids (430.70 ± 2.78 mg Quercetin Equivalent/100 g), and strong antioxidant activity (FRAP: 1158.8 ± 19.22 mg/g). Phenolic profiling via High-Performance Liquid Chromatography (HPLC) revealed flavanones as the dominant subclass, with hesperidin (61.29 mg/g) and ferulic acid (27.1 mg/g) as major constituents. These results highlight the nutritional and functional potential of DOP as a feed additive. The remarkable antioxidant capacity and high concentration of bioactive compounds like hesperidin position DOP not just as a filler, but as a functional feed additive that could enhance animal health. © The Author(s) 2025 This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article�s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article�s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit https://creativecommons.org/licenses/by/4.0/.

Item Type:	Article
Keywords:	Ferulic acid; Hesperidin; Hydrocinnamic acid; Orange waste
Subjects:	S Agriculture > SF Animal culture
Divisions:	World's Veterinary Journal (WVJ)
Page Range:	997 - 1006
Journal or Publication Title:	World's Veterinary Journal
Journal Index:	Scopus
Volume:	15
Number:	4
Publisher:	Scienceline Publication
Identification Number:	https://doi.org/10.54203/scil.2025.wvj101
ISSN:	2322-4568
Depositing User:	Dr. Alireza Sadeghi
URI:	https://eprints.science-line.com/id/eprint/1677

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