Influence of Hull and Impurity Content in High-Oleic Sunflower Seeds on Pressing Efficiency and Cold-Pressed Oil Yield
Source abstract
Abstract
This study investigates the effects of hull and impurity content on the efficiency of cold-pressing high-oleic sunflower seeds using a screw press. High-oleic sunflower oil is valued for its oxidative stability and health benefits, and optimizing pressing conditions is crucial for maximizing yield and maintaining oil quality. The identification of high-oleic sunflower oil was performed by analyzing its fatty acid composition, iodine value, and refractive index. Eleven seed samples with varying hull and impurity contents were processed to assess their impact on cake composition, pressing efficiency, and pressing oil yield. Oil yield ranged from 39.24% to 76.52%, with higher hull content contributing to increased yield due to its role in facilitating oil drainage. Multiple linear regression models were developed to predict moisture and oil content in the cake, as well as pressing efficiency, based on hull and impurity content, demonstrating strong predictive accuracy. These parameters were selected as they represent economically significant indicators, given that moisture and oil content indirectly reflect the protein content in the cake, while sunflower cake is primarily used as animal feed. Additionally, pressing efficiency indicates oil yield during pressing, which is the most critical economic parameter of the cold-pressing process. Cluster analysis identified three sample groups with distinct characteristics, revealing interactions between seed composition and pressing performance. The results highlight the significance of seed preparation in optimizing cold-pressing efficiency and provide insights for improving oil extraction processes. These findings support the industrial application of high-oleic sunflower seed pressing and contribute to the development of sustainable, high-quality oil production methods.
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Research context
OpenAlex topics: Sunflower and Safflower Cultivation · Biodiesel Production and Applications · Advanced Combustion Engine Technologies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Faculty of Technology Novi Sad, University of Novi Sad, Bulevar cara Lazara 1, 21000 Novi Sad, Serbia
College of Sliven, Technical University of Sofia, 59 Bourgasko Shaussee Blvd., 8800 Sliven, Bulgaria
Institute of Field and Vegetable Crops Novi Sad, National Institute of the Republic of Serbia, Maksima Gorkog 30, 21000 Novi Sad, Serbia
References (65)
Show source-provided references
1. A review of chemical composition and nutritional properties of minor vegetable oils in China10.1016/j.tifs.2018.01.013 ↗
2. Fatty acid profile of edible oils and fats consumed in India10.1016/j.foodchem.2017.05.072 ↗
3. O’Brien, R.D. (2009). Fats and Oils: Formulating and Processing for Applications, CRC Press. [3rd ed.].10.1201/9781420061673 ↗
4. Electronic noses in classification and quality control of edible oils: A review10.1016/j.foodchem.2017.11.013 ↗
5. Physicochemical properties of cold pressed sunflower, peanut, rapeseed, mustard and olive oils grown in the Eastern Mediterranean region10.1016/j.sjbs.2018.04.005 ↗
6. USDA (2025, February 03). Oilseeds: World Markets and Trade. World Agricultural Outlook Board, Available online: https://apps.fas.usda.gov/psdonline/circulars/oilseeds.pdf.
7. FAO (2024). Food Outlook, Biannual Report on Global Food Markets, Food and Agriculture Organization of United Nations. Available online: https://openknowledge.fao.org/server/api/core/bitstreams/f8c73abe-d26d-4d47-9272-c9b464cc0fc1/content.
8. Prediction of mechanical extraction oil yield of new sunflower hybrids: Artificial neural network model10.1002/jsfa.11234 ↗
9. Codex Alimentarius (1999). Standard for Named Vegetable Oils Codex Stan 210-1999, Codex Alimentarius.
10. Martínez-Force, E., Turgut Dunford, N., and Salas, J.J. (2015). Food Uses of Sunflower Oils. Sunflower Chemistry, Production, Processing, and Utilization, AOCS Press.
11. An overview of the modulatory effects of oleic acid in health and disease
12. FDA (2025, February 03). Completes Review of Qualified Health Claim Petition for Oleic Acid and the Risk of Coronary Heart Disease, Available online: https://www.fda.gov/food/hfp-constituent-updates/fda-completes-review-qualified-health-claim-petition-oleic-acid-and-risk-coronary-heart-disease.
13. Physicochemical properties and oxidative stability of frying oils during repeated frying of potato chips10.1007/s10068-017-0292-y ↗
14. Oxidative stability of high oleic sunflower oil during deep-frying process of purple potato Purple Majesty10.1016/j.heliyon.2021.e06294 ↗
15. Healthy blends of high linoleic sunflower oil with selected cold pressed oils: Functionality, stability and antioxidative characteristics10.1016/j.indcrop.2012.07.013 ↗
16. Monitoring stability and volatile oxidation compounds of cold-pressed flax seed, grape seed and black cumin seed oils upon photo-oxidation10.1007/s11694-017-9674-3 ↗
17. Effect of antiepileptic drug (Topiramate) and cold pressed ginger oil on testicular genes expression, sexual hormones and histopathological alterations in mice10.1016/j.biopha.2018.11.146 ↗
18. Lipid classes and subclasses of cold-pressed and solvent-extracted oils from commercial Indian Niger (Guizotia abyssinica (L.f.) Cass.) seed10.1007/s11746-014-2461-y ↗
19. The antioxidant activity and oxidative stability of cold-pressed oils10.1007/s11746-014-2479-1 ↗
20. Ramadan, M.F. (2020). Introduction to cold pressed oils: Green technology, bioactive compounds, functionality, and applications. Cold Pressed Oils: Green Technology, Bioactive Compounds, Functionality, and Applications, Elsevier Inc.10.1016/B978-0-12-818188-1.00001-3 ↗
21. Determination of trans fatty acids in cold pressed oils and in dried seeds10.1002/lipi.19960981107 ↗
22. State of works on the rapeseed oil processing optimization. I. Oil obtaining
23. Optimisation of Oil Extraction Process from Australian Native Beauty Leaf Seed (Calophyllum inophyllum)10.1016/j.egypro.2015.07.137 ↗
24. Optimization of Screw Press Extraction of Citrillus Lanatus Seed Oil and Physiochemical Characterization
25. Cold press in oil extraction. A review10.24263/2304-974X-2018-7-4-9 ↗
26. Elhassan, S.H.A.R. (2009). Mechanical Expression of Oil from Sesame (Sesamum indicum L.). [Ph.D. Thesis, University of Khartoum: Khartoum].
27. Nde, D.B., and Foncha, A.C. (2020). Optimization methods for the extraction of vegetable oils: A review. Processes, 8.10.3390/pr8020209 ↗
28. Hamm, W., and Hamilton, R.J. (2000). The production of oils. Edible Oil Processing, Sheffield Academic Press.
29. Screw pressing of whole and dehulled flaxseed for organic oil10.1007/s11746-003-0817-7 ↗
30. Cold-pressed edible rapeseed oil production in Germany
31. Effects of the contents of impurities and seed hulls on the quality of cold-pressed sunflower oil10.17221/179/2011-CJFS ↗
32. Ramadan, M.F. (2020). Valorization of by-products from the production of pressed edible oils to produce biopolymer films. Cold Pressed Oils: Green Technology, Bioactive Compounds, Functionality, and Applications, Academic Press.10.1016/B978-0-12-818188-1.00001-3 ↗
33. Martínez-Force, E., Turgut Dunford, N., and Salas, J.J. (2015). Utilization of Sunflower Proteins. Sunflower Chemistry, Production, Processing, and Utilization, AOCS Press.
34. (2015). Animal and Vegetable Fats and Oils—Gas Chromatography of Fatty Acid Methyl Esters—Part 4: Determination by Capillary Gas Chromatography (Standard No. ISO 12966-4:2015).
35. (2017). Animal and Vegetable Fats and Oils—Gas Chromatography of Fatty Acid Methyl Esters—Part 2: Preparation of Methyl Esters of Fatty Acids (Standard No. ISO 12966-2:2017).
36. (2017). Animal and Vegetable Fats and Oils—Determination of Refractive Index (Standard No. ISO 6320:2017).
37. (2024). Animal and Vegetable Fats and Oils—Determination of Iodine Value (Standard No. ISO 3961:2024).
38. Optimizing mechanical oil extraction of Jatropha curcas L. seeds with respect to press capacity, oil recovery and energy efficiency10.1016/j.indcrop.2011.03.009 ↗
39. (2009). Oilseeds—Determination of Oil Content (Reference Method) (Standard No. ISO 659:2009).
40. Oilseeds—Determination of Moisture and Volatile Matter Content (Standard No. ISO 665:2020).
41. Influence of smoking in traditional and industrial conditions on colour and content of polycyclic aromatic hydrocarbons in dry fermented sausage “Petrovská klobása”10.1016/j.lwt.2017.08.038 ↗
42. Dimić, E., and Turkulov, J. (2000). Kontrola Kvaliteta u Tehnologiji Jestivih Ulja, University of Novi Sad, Faculty of Technology Novi Sad.
43. Investigation of 6-fluoroquinolones activity against Mycobacterium tuberculosis using theoretical molecular descriptors: A case study10.2478/s11532-011-0071-1 ↗
44. Ridge regression in practice10.1080/00031305.1975.10479105 ↗
45. A caution regarding rules of thumb for variance inflation factors10.1007/s11135-006-9018-6 ↗
46. A Comparison of multiple linear regression and quantile regression for modeling the internal bond of medium density fiberboard
47. New guidelines for prediction of antioxidant activity of Lactuca sativa L. varieties based on phytochemicals content and multivariate chemometrics10.1111/jfpp.13355 ↗
48. Computational Methods of Multivariate Analysis in Physical Geography10.2307/3038164 ↗
49. Comparison of hierarchical cluster analysis methods by cophenetic correlation10.1186/1029-242X-2013-203 ↗
50. Rohlf, J.F. (1998). NTSYSpc, Numerical Taxonomy and Multivariate Analysis System Version 2.0 User Guide, Natural History.
51. Evaluation of oxidative stability of new cold-pressed sunflower oils during accelerate thermal stability tests10.1590/fst.67320 ↗
52. Effects of interesterification with solid base catalyst on physicochemical properties of lard and high-oleic sunflower oil blends10.1016/j.lwt.2024.116915 ↗
53. Oil and oilseed processing I
54. Lavoisier, T. (1992). Obtention des corps gras. Manuel des Corps Gras, Technique et Documentation—Lavoisier.
55. Mechanical Continuous Oil Expression from Oilseeds: A Review10.1007/s11947-012-0947-x ↗
56. Analysis of the Performance of a Dehulling System for Confectionary Sunflower Seeds
57. Dehulling effectiveness of high-oleic and linoleic sunflower oilseeds using air-jet impact dehuller: A comparative study10.1590/fst.58620 ↗
58. Optimization of hemp seeds (Canapa sativa L.) oil mechanical extraction
59. Kabutey, A., Herák, D., and Mizera, Č. (2023). Assessment of Quality and Efficiency of Cold-Pressed Oil from Selected Oilseeds. Foods, 12.10.3390/foods12193636 ↗
60. Study of Yield Characteristics During Mechanical Oil Extraction of Preheated and Ground Soybeans
61. Cooking indices to predict screw-press perfomance for crambe seed10.1007/s11746-001-0287-y ↗
62. Šmit, K., Dimić, E., Romanić, R., Bjelobaba-Bošnjak, K., and Mojsin, K. (2005). Uticaj ljuske na kvalitet hladno ceđenog ulja suncokreta. Zbornik Radova 46, Savetovanje Industrije Ulja, Proizvodnja i Prerada Uljarica.
63. Changes in colour of extra-virgin olive oil during storage
64. Esalami, S.M. (2018). Karakterizacija Kvaliteta, Nutritivne Vrednosti i Stabilnosti Devičanskih Maslinovih Ulja Proizvedenih u Različitim Regionima Libije/Characterization of the Quality, Nutritive Value and Stability of Virgin Olive Oils Produced Indifferent Regions of Libya. [PhD Thesis, University of Novi Sad, Faculty of Technology].
65. Regression Diagnostics: Identifying Influential Data and Sources of Collinearity