Extraction of oil of orange seeds by non-conventional methods: comparative study of ultrasof and supercrytical fluid

Author(s)

Daniele Penteado Rosa

• Document type: Doctoral Thesis
• Institution: Universidade Estadual Paulista (Unesp)
• Defense date: 2017-08-18
• Advisor: Javier Telis Romero; Alessandra Lopes de Oliveira

Abstract

Orange seed oil extraction is an alternative to waste disposal from the materials juice processing industry, and unconventional methods are studied to optimize the process in relation to yield and minimize the damage caused in relation to the temperature and the solvents used. Due to the different mechanisms of oil extraction, this project proposes to study the effect of ultrasound power and a supercritical fluid application in the extraction of orange seeds oils, determining which method presents better yield and better retains as bioactivity characteristics of the extract obtained. The ultrasound power extraction (UP) evaluated the time, power and effect of the solvent and compared with the yield obtained by supercritical fluid extraction (EFS). The characterization presented values within expected and close to those found in the literature. Dry seed moisture and available particle size within the limits indicated for extraction of vegetable oils. Greater yields for the extraction with ultrasound were found for the hexane, in time of 120 minutes and power of 900 W, yielding 36.74% of oil and a yield of 0.96. In the procedures of EFS it verifies As the extraction efficiency increases with increasing constant temperature pressure and the analysis of the behavior of the solute extraction curve over time, a typical behavior for EFS is observed as a function of the process variables, in which the higher yield is obtained in the constant rate step, yielding 34.98% oil in a yield of 0.92, for extraction at 70 ° C and 300 bar. A bioactivity analysis indicates that the orange seed oil presents the antioxidant activity and allows to determine the Isopropyl Alcohol is the best type of solvent for extraction of carotenoids with a value of 22.76 μg β-carotene/g sample, and what best preserves as antioxidant characteristics through the DPPH method with a value of 133.75 μM TE/g of sample. (AU)

• FAPESP's process: 13/18947-4 - Extraction of oil from orange seeds by unconventional methods - Comparative study of Ultrasonic Extraction and Supercritical Fluid
• Grantee: Daniele Penteado Rosa
• Support Opportunities: Scholarships in Brazil - Doctorate