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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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Main Authors: Kong, Sela, Keang, Tongor, Bunthan, Monyneath, Say, Manit, Nat, Yukleav, Chin, Ping Tan, Tan, Reasmey
Format: Article
Published: Multidisciplinary Digital Publishing Institute 2023
Online Access:http://psasir.upm.edu.my/id/eprint/108226/
https://www.mdpi.com/2305-7084/7/4/69
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spelling my.upm.eprints.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
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
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.
format Article
author Kong, Sela
Keang, Tongor
Bunthan, Monyneath
Say, Manit
Nat, Yukleav
Chin, Ping Tan
Tan, Reasmey
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
author_facet Kong, Sela
Keang, Tongor
Bunthan, Monyneath
Say, Manit
Nat, Yukleav
Chin, Ping Tan
Tan, Reasmey
author_sort Kong, Sela
title 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_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_sort hydraulic cold-pressed extraction of sacha inchi seeds: oil yield and its physicochemical properties
publisher Multidisciplinary Digital Publishing Institute
publishDate 2023
url http://psasir.upm.edu.my/id/eprint/108226/
https://www.mdpi.com/2305-7084/7/4/69
_version_ 1811686010267893760
score 13.211869

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