Heated-air drying of oilseeds

Sutherland, J.W.; Ghaly, T.F.

doi:10.1016/0022-474x(82)90002-9

Cited by 18 publications

(9 citation statements)

References 7 publications

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“…10 The drying temperature for drying of sunflower seeds should not be more than 70 C, and low initial moisture content of sunflower seeds around 16% are safer for not affecting the output quality. [11][12][13][14][15] For a given drying temperature, germination and free fatty acid of the sunflower seeds are increased with decreasing initial moisture.…”

Section: Introductionmentioning

confidence: 98%

“…[16][17][18][19] To obtain better quality of sunflower seeds with less specific energy consumption and more moisture removal, cross-flow continuous fluidized bed drying is considered as most successful drying technique. 11,19,20 So by making the bed oscillate, the sunflower seeds are spread as thin layer over the bed and moving continuously during drying. In this present study, the double-pass solar flat plate collector with oscillating bed was fabricated and tested for its thermal and drying performance.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of thermal efficiency of oscillating-bed solar dryer through drying of sunflower seeds

Shanmugam

Kumar

Veerappan

2011

Journal of Renewable and Sustainable Energy

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Quite a number of solar dryers have been reported for drying of different agricultural produce and products. Few dryers have their bed oscillated. A solar dryer, the bed of which is oscillated at different frequencies is presented in this paper. This paper also explains the drying methodology, variation in relative humidity, and removal of moisture content from sunflower seeds. It is possible to dry 31.36 kg of sunflower seeds to the average moisture level of 7.9% which is in the acceptable level of moisture content of less than 10% in just 8 h. The average thermal efficiency of the solar dryer is 30.

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Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Evaluation of thermal efficiency of oscillating-bed solar dryer through drying of sunflower seeds

Shanmugam

Kumar

Veerappan

2011

Journal of Renewable and Sustainable Energy

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“…The absorbance value (A) of oil was recorded with 0.0001 accuracy at each characteristic wavelength. The color of oil (C), which is the combined effect of various complimentary hues, was calculated by following equation (Sutherland and Ghaly 1982;Pathak 1989 …”

Section: Determination Of Oil Color and Free Fatty Acid Contentmentioning

confidence: 99%

Effect of Moisture Content on the Quality of Soybean Oil and Meal Extracted by Isopropyl Alcohol and Hexane

Seth

Agrawal

Ghosh

et al. 2008

Food Bioprocess Technol

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Soyflakes and soybrokens having 8% to 16% wet basis (w.b.) moisture contents were extracted for 8 h (about 50% extraction) using the azeotrope (91%) of isopropyl alcohol (IPA) at 7.75 ml/min flow rate. The moisture contents of soyflakes and soybrokens significantly affected oil recovery with IPA. Regression analysis was performed to optimize moisture contents of soyflakes and soybrokens during IPA extraction. The optimum moisture content was found to be 13.4% and 12.6% (w.b.) for soyflakes and soybrokens, respectively. Qualities of IPA-extracted oil [color and free fatty acid (FFA) content] and of de-oiled soy meal (whiteness value and crude protein content) were determined and compared with those of absolute n-hexane-extracted oil and meal at 4.15, 6.35, and 7.15 ml/min flow rates. Prior to the IPA and n-hexane extractions, soyflakes and soybrokens were hydrated to the optimum moisture content. The colors of IPA-extracted oil and soymeal were somewhat darker than those extracted by n-hexane. IPA-extracted oil had significantly lower FFA content than the n-hexane-extracted oil. De-oiled soy meals obtained from IPA extraction had lower whiteness values indicating darker color compared to nhexane. Crude protein contents were similar in both oil and meal obtained from both solvent extraction processes.

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“…The drying of rapeseeds to obtain improved mechanical characteristics prior to press extraction was studied by Fornal et al [ 6 ]. The literature shows divergent data about the effect of the process temperature on the oil quality, measured in terms of its acidity value, peroxide index, and tocopherol content, of different seeds due to the interaction between variables such as dryer characteristics, temperature and required time to reach a particular moisture content, among others [ 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 ]. While it has been found that temperature and storage time generated a decrease in tocopherol content in the oil of wheat germen samples at 27 °C and 45 °C [ 12 ], treatments like the toasting of soybean seeds between 100 and 140 °C generated an increase in tocopherol content [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Drying Operating Conditions on Canola Oil Tocopherol Content

Laoretani¹,

Fernández

Crapiste

et al. 2014

Antioxidants

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The aim of this work was to evaluate two operating parameters of seed drying (temperature and initial moisture content) on the tocopherol content of canola oil. The raw material was characterized by moisture, oil, protein, crude fiber and ash content. Seeds at 13.6% and 22.7% moisture content (dry basis, db) were dried at temperatures in the range of 35–100 °C to a safe storage moisture of 7% db. Oil was extracted from each treated sample. The oil extracted from the samples dried at the extreme temperatures was analyzed by means of the acidity value, peroxide index and fatty acid composition, finding no significant differences among treatments or among untreated and treated samples. Tocopherol contents in the oils obtained for all the assayed temperatures were determined. Differences were found for the samples with 22.7% (db) initial moisture content. Except at 35 °C, temperature affected negatively the oil tocopherol content. However, when 13.6% (db) moisture seeds were processed, no significant differences were observed in the amount of this minor oil component among assays.

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Heated-air drying of oilseeds

Cited by 18 publications

References 7 publications

Evaluation of thermal efficiency of oscillating-bed solar dryer through drying of sunflower seeds

Evaluation of thermal efficiency of oscillating-bed solar dryer through drying of sunflower seeds

Effect of Moisture Content on the Quality of Soybean Oil and Meal Extracted by Isopropyl Alcohol and Hexane

Effect of Drying Operating Conditions on Canola Oil Tocopherol Content

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