Extraction and Purification of Kiwifruit Seed Oil Using Three-Phase Partitioning: An Efficient and Value-Adding Method for Agro-Industrial Residue Utilization

Author:

Liu Bangfu1,Li Xiufang2,Liu Qingchun3,Tan Zhijian4ORCID

Affiliation:

1. Hunan Electronic Information Industry Institute, Changsha 410012, China

2. College of Pharmacy, Heze University, Heze 274015, China

3. Xiangxi Laodie Biotechnology Co., Ltd., Xiangxi 416714, China

4. Institute of Bast Fiber Crops & Center of Southern Economic Crops, Chinese Academy of Agricultural Sciences, Changsha 410205, China

Abstract

Kiwifruit seeds are usually discarded as waste in the kiwifruit processing industry. However, kiwifruit seeds are rich in oil, which implies their value as a potential resource. Therefore, three-phase partitioning (TPP) using ammonium sulfate and n-butanol has been developed to extract kiwifruit seed oil (KSO) from discarded kiwifruit seeds. The factors influencing the extraction process have been investigated. The highest extraction yield of 36.06% for KSO was obtained under the following conditions: an extraction time of 18 h, a liquid-solid ratio of 4:1, an amount of ammonium sulfate of 28.5 wt%, and a phase ratio (top phase/bottom phase) of 1/1. The composition of obtained KSO was analyzed by gas chromatography-mass spectrometry (GC-MS), and the results indicated the high content of α-linolenic acid. This simple and low-cost method can be used as an efficient approach for utilizing the value of kiwifruit seeds.

Funder

Agricultural Science and Technology Innovation Program

Central Public-interest Scientific Institution Basal Research Fund

Natural Science Foundation of Shandong Province

Heze University Pharmaceutical Research Institute Cultivation Fund Project

Heze University Research Fund Science and Technology Project

Publisher

MDPI AG

Subject

Process Chemistry and Technology,Chemical Engineering (miscellaneous),Bioengineering

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