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Valorization of Citrus unshiu biowastes to value-added products: an optimization of ultrasound-assisted extraction method using response surface methodology and particle swarm optimization

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Abstract

Satsuma mandarin, which is also known as Citrus unshiu, contains high amount of polyphenols and antioxidants. This study focused on the biowaste valorization of bioactive compounds used for food supplementary. For this purpose, ultrasonic extraction method was utilized. The antioxidant capacity and polyphenolic content of the Citrus unshiu extracts were determined. The number of experiments was reduced owing to the response surface methodology (RSM) and particle swarm optimization (PSO). Therefore, the extraction process has become more economical. In this study, according to the RSM, optimal conditions were determined as 90 min, 56% amplitude, and 50 °C. PSO suggested the optimal conditions as follows: 27 min, 50 amplitude, and 52 °C. For the performance metrics, RSM gave higher satisfactory results than PSO. For RSM, 8.953 GA/g-peel and 5.253 catechin/g-peel were obtained as total phenolics content (TPC) and total flavonoids content (TFC). For PSO, 6.977 GA/g-peel and 6.454 catechin/g-peel were obtained as phenolics and flavonoids. The highest R-values for TPC (0.9947) and TFC (0.9825) were obtained by RSM. The results proved that Citrus unshiu peel contains highly rich phenolic and high value-added bioactive compounds.

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Funding

The authors gratefully acknowledge the financial support received from BAP (Project No: 802-29111) from the İstanbul University-Cerrahpaşa.

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Authors and Affiliations

  1. Engineering Faculty, Department of Chemical Engineering, Istanbul University-Cerrahpaşa, 34320, Avcılar, Istanbul, Turkey

    Çağla Poyraz, Şah İsmail Kırbaşlar & Selin Şahin

  2. Engineering Faculty, Department of Electrical and Electronics Engineering, Uşak University, 64200, Uşak, Turkey

    Gürkan Küçükyıldız

  3. Engineering Faculty, Department of Chemical Engineering, Uşak University, 64200, Uşak, Turkey

    Zeynep Ciğeroğlu

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  1. Çağla Poyraz
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  2. Gürkan Küçükyıldız
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  3. Şah İsmail Kırbaşlar
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  4. Zeynep Ciğeroğlu
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  5. Selin Şahin
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Correspondence to Zeynep Ciğeroğlu.

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Poyraz, Ç., Küçükyıldız, G., Kırbaşlar, Ş. et al. Valorization of Citrus unshiu biowastes to value-added products: an optimization of ultrasound-assisted extraction method using response surface methodology and particle swarm optimization. Biomass Conv. Bioref. 13, 3719–3729 (2023). https://doi.org/10.1007/s13399-021-01329-9

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  • DOI: https://doi.org/10.1007/s13399-021-01329-9

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