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Cited by 24Agricultural Engineering and MechanizationEdible Oils Quality and AnalysisUltrasound and Cavitation Phenomena

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Ultrasound‐assisted extraction of oil from hempseed (Cannabis sativaL.): Part 1

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Esposito, Marilena, Piazza, Laura·2022·Journal of the Science of Food and Agriculture
DOI 10.1002/jsfa.11404PMC PMC9292751
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Abstract

BACKGROUND: Ultrasound‐assisted extraction of the intermediate product from the mechanical expression of hemp (Cannabis sativa L.) seed oil was investigated to improve the overall expression yield without compromising oil quality. Complementary ultrasound technology was used as an out‐of‐line treatment carried out at 20 kHz frequency and optimized with respect to amplitude (80 and 152 μm), sonication time (2, 10, 20 min) and to the hemp paste properties, in particular its particle size and hydration, which drive the compressibility of the press cake. RESULTS: Under the conditions evaluated, the optimal ultrasound treatment was found to be the one applied on the hydrated press cake for 2 min at 152 μm, which resulted in an oil yield of 13.4%, with an increase in extraction efficiency equal to 73% with respect to the control (untreated press cake). Sonication had a positive effect on the press cake texture and on the extracted oil antioxidant activity. Soaked samples treated for 2 min at 152 μm yielded the lowest hardness. Oil recovered from soaked samples treated at 80 μm and 152 μm ultrasound for 2 min had the highest antioxidant capacity. CONCLUSIONS: The technological results gathered in the present investigation are preliminary to the design and engineering of scaled‐up equipment that combines the mechanical screw expression and the in‐line ultrasound unit. © 2021 The Authors. Journal of The Science of Food and Agriculture published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.

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Figure 1 Scheme of hemp oil processing line (image courtesy of Next Farm, Bagnolo Cremasco, (CR), Italy): 1, solid feed; 2, electric motor and inverter; 3, first oil expression section; 4, second oil expression section; 5, exhausted cake discharge section; 6, die and discharge of residual cake on the screw.
Figure 1 Scheme of hemp oil processing line (image courtesy of Next Farm, Bagnolo Cremasco, (CR), Italy): 1, solid feed; 2, electric motor and inverter; 3, first oil expression section; 4, second oil expression section; 5, exhausted cake discharge section; 6, die and discharge of residual cake on the screw.CC BY · PubMed Central
Figure 2 Oil extraction yield for raw (a), soaked (b) and milled (c) press cakes at different sonication amplitudes (80 μm () and 152 μm ()) and sonication duration (2, 10, 20 min).
Figure 2 Oil extraction yield for raw (a), soaked (b) and milled (c) press cakes at different sonication amplitudes (80 μm () and 152 μm ()) and sonication duration (2, 10, 20 min).CC BY · PubMed Central
Figure 3 Compression–extrusion profiles for raw press cake ( ), milled press cake () and soaked press cake () treated with ultrasound (152 μm, 2 min).
Figure 3 Compression–extrusion profiles for raw press cake ( ), milled press cake () and soaked press cake () treated with ultrasound (152 μm, 2 min).CC BY · PubMed Central

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Metadata

Authors
Esposito, M., & Piazza, L.
Affiliations
University of Milan (IT)
Corresponding author
Piazza, Laura
ORCID
Venue
Journal of the Science of Food and Agriculture
Publisher
Wiley
Published
2021-07-18
Volume
102
Issue
2
Pages
732-739
ISSN
  • 0022-5142 (ISSN-L)
  • 1097-0010
DOI
10.1002/jsfa.11404
PMC
PMC9292751
OpenAlex
W3173517742
Cited by
24
References
42
Citations by year
2026: 6 · 2025: 7 · 2024: 4 · 2023: 2 · 2022: 5
FWCI
1.18
Type
journal article
Language
en
Open access
Licence
Locations
  • Journal of the Science of Food and Agriculture (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Archivio Istituzionale della Ricerca (Universita Degli Studi Di Milano) (submittedVersion, other-oa)
Funders
Fondazione Cariplo
Topics
  • Physical Sciences › Engineering › Mechanical Engineering › Agricultural Engineering and Mechanization
  • Physical Sciences › Chemistry › Organic Chemistry › Edible Oils Quality and Analysis
  • Physical Sciences › Physics and Astronomy › Acoustics and Ultrasonics › Ultrasound and Cavitation Phenomena
Keywords
ultrasound-assisted extraction, hemp oil, Cannabis sativa, oil cake, oil yield, sonication amplitude, sonication time, particle size, hydration, oil quality, antioxidant activity
MeSH terms
Animals, Antioxidants, Cannabis, Food Handling, Plant Oils, Sonication, Ultrasonics

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CoChat. (2026). Citation check: Ultrasound‐assisted extraction of oil from hempseed (Cannabis sativaL.): Part 1. https://app.cochat.ai/papers/10.1002/jsfa.11404
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Esposito, M., & Piazza, L. (2022). Ultrasound‐assisted extraction of oil from hempseed (Cannabis sativaL.): Part 1. Journal of the Science of Food and Agriculture. https://doi.org/10.1002/jsfa.11404