Advancements in Oil and Oilseed Processing

Dunford, Nurhan Turgut

doi:10.1002/9781119946083.ch4

Cited by 31 publications

(37 citation statements)

References 91 publications

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“…Mechanical extraction is simple but leaves behind up to 5e6 wt% unextracted oil [3]. Solvent extraction provides better oil recovery but requires thorough preparation of the feedstock including drying, cleaning, dehulling, conditioning, flaking, cooking/tempering, and pre-pressing [4]. A number of solvents can be used for oil extraction from oilseeds.…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal treatment for enhancing oil extraction and hydrochar production from oilseeds

2016

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a b s t r a c tA novel integrated oil extraction process that includes hydrothermal pretreatment and oil extraction (HPOE) from whole oilseeds followed by hydrothermal carbonization (HTC) of the extracted seedcake to hydrochar was developed. Five different types of oilseeds including cotton-, flax-, mustard-, canola-, and jatropha seeds were used in the study. The seeds were subjected to hydrothermal pretreatment in the range of temperatures from 120 to 210 C for 30 min. Oils were extracted from the pretreated seeds using n-hexane in a Soxhlet apparatus for 120 min. The crude oil yields from the pretreated seeds at 180 C and 210 C were significantly higher (up to 30 wt%) than those from the respective untreated ground seeds. The seedcake after oil extraction was subjected to HTC at 300 C with the recycled aqueous phase collected from the pretreatment step. The produced hydrochar had higher heating value of 26.5 kJ/g comparable to that of bituminous coal. BET surface area and pore volume analysis showed that the pretreated seeds had larger surface area and pore volume/size than the respective raw seeds, which resulted in better extractability of oil, shorter extraction time, and overall efficiency of HPOE process. Analyses of the crude oil did not show significant signs of degradation after the hydrothermal pretreatment of oilseeds. The study is the first of its kind where integrated oil extraction and hydrochar production from oilseeds have been studied with the objective of minimizing feedstock preparation and maximizing oil extraction and overall energy conversion using environmentally benign hydrothermal processes.

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Section: Introductionmentioning

confidence: 99%

Hydrothermal treatment for enhancing oil extraction and hydrochar production from oilseeds

2016

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“…This is due to the health issues, such as coronary heart diseases, associated with the animal sources of oil (Fellows ). Nutritionally, vegetable oil provides calories and vitamins in human diet in an easily digested form and at a lower cost (Dunford ). Despite the broad range of sources for vegetable oils, the world consumption is dominated by soybean, palm, rapeseed, and sunflower oils with 31.6, 30.5, 15.5, and 8.6 million tons consumed per year, respectively (Stevenson et al.…”

Section: Introductionmentioning

confidence: 99%

“…The demand for vegetable oils for food purposes requires a considerable expansion of oilseed crop production (C¸amas et al 2007). Generally fat and oil are major sources of energy to human, generating greater amount of calories than carbohydrates in food (Dunford 2010). Aside from generating energy, they are known to be sources of some vitamins such as A, D, E, K, and essential fatty acids which the human body cannot synthesize.…”

Section: Introductionmentioning

confidence: 99%

Optimization of oil extraction from giant bushel gourd seeds using response surface methodology

Popoola

Akinoso

Raji

2016

Food Science & Nutrition

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Gourd seeds have been identified as a source of edible oil, but there is sparse literature on the effect of processing factors on the characteristics of oil extracted from any Lagenaria spp. Optimization of oil extraction with the aid of expeller was achieved by applying response surface methodology. The variables were roasting temperature (87.70-172.0°C) and roasting duration (7.93-22.07 min), while the responses were oil yield and oil quality (free fatty acid, color, specific gravity, saponification value, moisture, and refractive index). Data obtained were analyzed at P < 0.05. Roasting conditions significantly influenced all the responses at P < 0.05. The optimum roasting condition was 100°C for 20 min, which gave 27.62% oil yield with good quality attributes (free fatty acid: 0.61%, color: 3.47 abs, specific gravity: 0.90 g/mL, saponification value: 289.66 mL, and refractive index: 1.47). 760

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“…Crushing and grinding changes the cake permeability and thus promotes solvent extraction. Moisture conditioning of seeds, oil viscosity reduction, increasing plasticity of seed, breaking of cell walls, protein clotting by denaturation, sterilization and deactivation of thermosensitive enzymes, and destruction of thermolabile toxic components are several of the benefits provided by cooking [44][45][46][47]. Enzymatic hydrolysis opens up the oilseed cell walls through biodegradation and thus provides an alternative for pretreatment.…”

Section: Process Of Extraction Of Oils From Oilseedsmentioning

confidence: 99%

Tree-Borne Edible Oilseeds as Sources of Essential Omega Fatty Acids for Human Health

Chaliha¹,

Saikia²,

Saikia³

2020

The Health Benefits of Foods - Current Knowledge and Further Development

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Certain positional isomers of polyunsaturated omega-3 and omega-6 fatty acids are the essential fatty acids that the human body needs for metabolic functioning but cannot produce themselves and therefore must be acquired from the diet. The beneficial effects of omega-3 fatty acids are related to brain development, coronary heart disease (CHD), cancer, inflammatory bowel disease, rheumatoid arthritis, psoriasis, mental health, and neurodegenerative disorders. The essential omega-3 fatty acid is α-linolenic acid (ALA; 18:3ω3), found in green leafy vegetables and in the seeds of flax, rape, chia, and walnuts. The essential omega-6 fatty acid, linoleic acid (LA; 18:2ω6), is plentiful in nature and being found in the seeds of many edible plants. There are at least hundred species of plants occurring in wild or cultivated from forest areas that may be a source of vegetable oil. These vegetable oils are rich in polyunsaturated fatty acids, which are highly beneficial for human health.

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Advancements in Oil and Oilseed Processing

Cited by 31 publications

References 91 publications

Hydrothermal treatment for enhancing oil extraction and hydrochar production from oilseeds

Hydrothermal treatment for enhancing oil extraction and hydrochar production from oilseeds

Optimization of oil extraction from giant bushel gourd seeds using response surface methodology

Tree-Borne Edible Oilseeds as Sources of Essential Omega Fatty Acids for Human Health

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