Hydraulic cold-pressed extraction of sacha inchi seeds: Oil yield and its physicochemical properties
Sacha inchi oil (SIO) extraction has been extensively studied using various oil extraction techniques to achieve a high oil recovery. However, most studies relied on heat-based methods, which led to compromised oil quality and reduced nutritional values, particularly polyunsaturated fatty acids (ome...
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| Format: | Article |
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Multidisciplinary Digital Publishing Institute
2023
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| Online Access: | http://psasir.upm.edu.my/id/eprint/108226/ |
| _version_ | 1848865106459361280 |
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| author | Kong, Sela Keang, Tongor Bunthan, Monyneath Say, Manit Nat, Yukleav Chin, Ping Tan Tan, Reasmey |
| author_facet | Kong, Sela Keang, Tongor Bunthan, Monyneath Say, Manit Nat, Yukleav Chin, Ping Tan Tan, Reasmey |
| author_sort | Kong, Sela |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | Sacha inchi oil (SIO) extraction has been extensively studied using various oil extraction techniques to achieve a high oil recovery. However, most studies relied on heat-based methods, which led to compromised oil quality and reduced nutritional values, particularly polyunsaturated fatty acids (omega-3 and omega-6), vitamin E, and phenolic compounds. To address these concerns, this study employed a hydraulic cold-pressed extraction (HCPE) technique for extracting SIO aiming to enhance oil yield while preserving its nutritional integrity. During the HCPE process of sacha inchi seeds (SIS), conducted at a constant temperature of 25 ± 1 °C, pressures and pressing times were varied within the range of 30–50 MPa and 10–30 min, respectively, to determine their impact on SIO yields. The results revealed that both pressure and pressing time significantly influenced the yields of SIO (p < 0.05), with the highest oil recovery of 86.31 wt.% on a wet basis achieved at 50 MPa for 30 min. Regarding physicochemical properties, the peroxide values (5.71–9.07 meq/kg), iodine values (176.22–197.76 g I2/100 g), acid values (1.82–2.16 mg KOH/g), and percentage of free fatty acids (0.91–1.08 wt.% as oleic acid) were found to be influenced by pressure and pressing time (p < 0.05). Additionally, the color variation by L* (34.22–35.17), −a* (0.39–0.81), and b* (3.48–5.62) changed with each oil yield. Notably, the high iodine value in SIO indicated a substantial content of polyunsaturated fatty acids, including omega-3 (40.86%), omega-6 (40.87%), and omega-9 (10.20%). Furthermore, a comparison with solvent extraction methods demonstrated that HCPE exhibited similar efficiency in extracting SIO, offering additional advantage in terms of its cold-pressed condition, eliminating of solvent use, simplicity, short extraction time, and higher oil recovery. |
| first_indexed | 2025-11-15T13:59:26Z |
| format | Article |
| id | upm-108226 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-15T13:59:26Z |
| publishDate | 2023 |
| publisher | Multidisciplinary Digital Publishing Institute |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-1082262024-09-11T07:28:17Z http://psasir.upm.edu.my/id/eprint/108226/ Hydraulic cold-pressed extraction of sacha inchi seeds: Oil yield and its physicochemical properties Kong, Sela Keang, Tongor Bunthan, Monyneath Say, Manit Nat, Yukleav Chin, Ping Tan Tan, Reasmey Sacha inchi oil (SIO) extraction has been extensively studied using various oil extraction techniques to achieve a high oil recovery. However, most studies relied on heat-based methods, which led to compromised oil quality and reduced nutritional values, particularly polyunsaturated fatty acids (omega-3 and omega-6), vitamin E, and phenolic compounds. To address these concerns, this study employed a hydraulic cold-pressed extraction (HCPE) technique for extracting SIO aiming to enhance oil yield while preserving its nutritional integrity. During the HCPE process of sacha inchi seeds (SIS), conducted at a constant temperature of 25 ± 1 °C, pressures and pressing times were varied within the range of 30–50 MPa and 10–30 min, respectively, to determine their impact on SIO yields. The results revealed that both pressure and pressing time significantly influenced the yields of SIO (p < 0.05), with the highest oil recovery of 86.31 wt.% on a wet basis achieved at 50 MPa for 30 min. Regarding physicochemical properties, the peroxide values (5.71–9.07 meq/kg), iodine values (176.22–197.76 g I2/100 g), acid values (1.82–2.16 mg KOH/g), and percentage of free fatty acids (0.91–1.08 wt.% as oleic acid) were found to be influenced by pressure and pressing time (p < 0.05). Additionally, the color variation by L* (34.22–35.17), −a* (0.39–0.81), and b* (3.48–5.62) changed with each oil yield. Notably, the high iodine value in SIO indicated a substantial content of polyunsaturated fatty acids, including omega-3 (40.86%), omega-6 (40.87%), and omega-9 (10.20%). Furthermore, a comparison with solvent extraction methods demonstrated that HCPE exhibited similar efficiency in extracting SIO, offering additional advantage in terms of its cold-pressed condition, eliminating of solvent use, simplicity, short extraction time, and higher oil recovery. Multidisciplinary Digital Publishing Institute 2023 Article PeerReviewed Kong, Sela and Keang, Tongor and Bunthan, Monyneath and Say, Manit and Nat, Yukleav and Chin, Ping Tan and Tan, Reasmey (2023) Hydraulic cold-pressed extraction of sacha inchi seeds: Oil yield and its physicochemical properties. ChemEngineering, 7 (4). art. no. 69. pp. 1-11. ISSN 2305-7084 https://www.mdpi.com/2305-7084/7/4/69 10.3390/chemengineering7040069 |
| spellingShingle | Kong, Sela Keang, Tongor Bunthan, Monyneath Say, Manit Nat, Yukleav Chin, Ping Tan Tan, Reasmey Hydraulic cold-pressed extraction of sacha inchi seeds: Oil yield and its physicochemical properties |
| title | Hydraulic cold-pressed extraction of sacha inchi seeds: Oil yield and its physicochemical properties |
| title_full | Hydraulic cold-pressed extraction of sacha inchi seeds: Oil yield and its physicochemical properties |
| title_fullStr | Hydraulic cold-pressed extraction of sacha inchi seeds: Oil yield and its physicochemical properties |
| title_full_unstemmed | Hydraulic cold-pressed extraction of sacha inchi seeds: Oil yield and its physicochemical properties |
| title_short | Hydraulic cold-pressed extraction of sacha inchi seeds: Oil yield and its physicochemical properties |
| title_sort | hydraulic cold-pressed extraction of sacha inchi seeds: oil yield and its physicochemical properties |
| url | http://psasir.upm.edu.my/id/eprint/108226/ http://psasir.upm.edu.my/id/eprint/108226/ http://psasir.upm.edu.my/id/eprint/108226/ |