Investigation of conversion of sunflower oil production wastes to high value compounds by supercritical CO2

Year 2023, Volume: 6 Issue: 2, 94 - 101, 30.06.2023

Müberra Nur Kılıçarslan , Mehmet Emin Argun

https://doi.org/10.35208/ert.1245691

Abstract

The evaluation of wastes from edible oil production industry has increasing importance because of resources deficiency and growing population day by day. It was aimed to investigate the recovery potential of oil and valuable components from sunflower oil production wastes by using supercritical CO2 (SC- CO2) extraction as a green extraction method. In this context oil amounts, total phenolic content (TPC), total flavonoid content and antioxidant activities were analysed. The waste samples obtained from filtration processes of the oil which were composed of oily bentonite (OB) and waxy perlite (WP). Soxhlet extraction was also applied on the waste samples to calculate extraction efficiencies of the SC- CO2. It was observed that oil recovery efficiency of OB (27%, v/v) were more effective than WP (11%, v/v). However, the efficiency increased to 37% by mixing expanded perlite and OB sample to absorb moisture content of the waste and to increase the diffusion of carbon dioxide more easily. The statistical evaluation of the experiments was also conducted to determine the effect of independent variables on the recovery efficiencys. Pressure was detected more effective variables on the recovery values than temperature. The maximum recovery efficiencies of the oil and TPC were obtained at the 50 oC, 22.1 MPa and 60 oC, 20 MPa, respectively.

Keywords

Sunflower oil, Supercritical CO2 extractions, Upcycling, Value added content, Waste

References

• J. M. Jaski, K. K. B. Abrantes, A. B. Zanqui, N. Stevanto, C. Da Silva, C. E. Barao, L. Bonfim-Rocha, and L. Cardozo-Filho, “Simultaneous extraction of sunflower oil and active compounds from oliv leaves using pressurized propane,” Curr Res Foo Sci, vol. 5, pp. 531–544.
• I. Zardo, A. de Espindola Sobczyk, L. D. F. Marczak, and J. Sarkis, “Optimization of Ultrasound Assisted Extraction of Phenolic Compounds form Sunflower Seed Cake Using Response Surface Methodology,” Waste Biomass Valorization, vol. 10, pp. 33–44, 2019.
• A. I. Casoni, V. S. Gutierrez, and M. A. Volpe, “Conversion of sunflower seed hulls, waste from edible oil production, into valuable products,” J Environ Chem Eng, vol. 7, no. 1, p. 102893, Feb. 2019, doi: 10.1016/J.JECE.2019.102893.
• H. M. Liu, X. Y. Liu, Y. Y. Yan, J. H. Gao, Z. Qin, and X. de Wang, “Structural properties and antioxidant activities of polysaccharides isolated from sunflower meal after oil extraction,” Arabian Journal of Chemistry, vol. 14, no. 12, p. 103420, Dec. 2021, doi: 10.1016/J.ARABJC.2021.103420.
• J. v. Jadhav, A. P. Pratap, and S. B. Kale, “Evaluation of sunflower oil refinery waste as feedstock for production of sophorolipid,” Process Biochemistry, vol. 78, pp. 15–24, Mar. 2019, doi: 10.1016/J.PROCBIO.2019.01.015.
• A. Daraee, S. M. Ghoreishi, and A. Hedayati, “Supercritical CO2 extraction of chlorogenic acid from sunflower (Helianthus annuus) seed kernels: modeling and optimization by response surface methodology,” J Supercrit Fluids, vol. 144, pp. 19–27, Feb. 2019, doi: 10.1016/J.SUPFLU.2018.10.001.
• Water Environment Federation, “Oil and Grease,” in Standard Methods for the Examination of Water and Wastewater, 20th ed.Washington,D.C., 1998.
• V. L. Singleton, R. Orthofer, and R. M. Lamuela-Raventós, “[14] Analysis of total phenols and other oxidation substrates and antioxidants by means of folin-ciocalteu reagent,” Methods Enzymol, vol. 299, pp. 152–178, Jan. 1999, doi: 10.1016/S0076-6879(99)99017-1.
• J. Zhishen, T. Mengcheng, and W. Jianming, “The determination of flavonoid contents in mulberry and their scavenging effects on superoxide radicals,” Food Chem, vol. 64, no. 4, pp. 555–559, Mar. 1999, doi: 10.1016/S0308-8146(98)00102-2.
• L. Yu, S. Haley, J. Perret, and M. Harris, “Antioxidant properties of hard winter wheat extracts,” Food Chem, vol. 78, no. 4, pp. 457–461, Sep. 2002, doi: 10.1016/S0308-8146(02)00156-5.