Membrane processing of used frying oils

Subramanian, R.; Nandini, K. E.; Sheila, P. M.; Gopalakrishna, A. G.; Raghavarao, K.S.M.S.; Nakajima, Mitsutoshi; Kojima, Toshinori; Maekawa, Taira

doi:10.1007/s11746-000-0052-2

Cited by 72 publications

(48 citation statements)

References 4 publications

(12 reference statements)

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“…These may be attributed to the light increase in carbonyl compounds. A good quality oil should have a p-anisidine value of less than two (Subramanian et al, 2000). All the oil samples from the literature had low p-anisidine values (Table 2B), reflecting the p-anisidine value of a good quality oil.…”

Section: Germination (182-192 Mg Koh·gmentioning

confidence: 96%

Effects of germination on chemical composition and antioxidant activity of flaxseed (<em>Linum usitatissimum</em> L) oil

Herchi¹,

Bahashwan²,

Sebei³

et al. 2015

Grasas y Aceites

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Section: Germination (182-192 Mg Koh·gmentioning

confidence: 96%

Effects of germination on chemical composition and antioxidant activity of flaxseed (<em>Linum usitatissimum</em> L) oil

Herchi¹,

Bahashwan²,

Sebei³

et al. 2015

Grasas y Aceites

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“…The efficiency of SCBA at level 2 % in lowering the viscosity of used sunflower oil was significantly (P≤0.05) the same as that of Magnesol XL at levels 2 and 3 %. The reduction in viscosity of treated oil indicates that polymers, which are the high molecular weight fraction of the degradation products, are reduced in the oil (Subramanian et al 2000).…”

Section: Quality Parameters Of Unused and Used Frying Sunflower Oilmentioning

confidence: 99%

“…These reports indicate the necessity to remove peroxides and these toxic compounds from deteriorated fried oils. In this respect, there are various methods that can be used to remove these products such as filtration through special membranes (Mulflur and Munson 1987;Subramanian et al 2000) and by using different adsorbent materials including both natural and synthetic adsorbents. Usually, active forms of carbon, calcium, silica, alumina, and magnesia are major constituents of such products (Yates and Caldwell 1992;Lin et al 1999;Farag and El-Anany 2006;Ali Rehab 2008 and).…”

Section: Introductionmentioning

confidence: 99%

Recovery of used frying sunflower oil with sugar cane industry waste and hot water

Ali

El-Anany

2012

J Food Sci Technol

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The main goal of the current investigation was to use sugar cane bagasse ash (SCBA) and to compare its adsorption efficiency with Magnesol XL as synthetic adsorbents to regenerate the quality of used frying sunflower oil. In addition, to evaluate the effect of water washing process on the quality of used frying oil and the treated oil. The metal patterns of sugar cane bagasse ash and Magnesol XL were determined. Some physical and chemical properties of unused, used frying and used-treated sunflower oil were determined. Sunflower oil sample was heated at 180°C+5°C, then frozen French fries potato were fried every 30 min. during a continuous period of 20 h. Oil samples were taken every 4 h. The filter aids were added individually to the used frying oil at levels 1, 2 and 3 % (w / v), then mechanically stirred for 60 min at 105°C. The results indicate that all the filter aids under study were characterized by high levels of Si and variable levels of other minerals. The highest level of Si was recorded for sugar cane bagasse ash (SCBA) was 76.79 wt. %. Frying process caused significant (P≤0.05) increases in physico-chemical properties of sunflower oil. The treatments of used frying sunflower oil with different levels of sugar cane bagasse ash and Magnesol XL caused significant (P≤0.05) increase in the quality of treated oil, however the soap content of treated oil was increased, therefore, the effect of water washing process on the quality of used frying and used-treated sunflower oil was evaluated. The values of soap and Total polar compounds after water treatment were about 4.62 and 7.27 times as low as that for sunflower oil treated with 3 % sugar cane bagasse ash (SCBA). The results of the present study indicate that filtration treatment with different levels of sugar cane bagasse ash( SCBA) regenerated the quality of used sunflower oil and possess higher adsorbing effects than the synthetic filter aid ( Magnesol XL ) in removing oil oxidation products. The current study also recommends using hot water treatment for improving the quality of used frying oil.

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“…However, only a few commercial processes are available in the edible oil industries despite considerable research efforts. In recent years, Subramanian et al (15)(16)(17) extensively investigated processing solvent-extracted oils, screw-pressed oils (18), and used frying oils (19) with nonporous denser polymeric composite membranes. Studies were also carried out to understand the rejection mechanism of phospholipids (20) and pigments (21), as well as differential permeation of liquid constituents, namely, TG, FFA, and tocopherols (22,23).…”

mentioning

confidence: 99%

Processing vegetable oils using nonporous denser polymeric composite membranes

Subramanian

Nakajima

Raghavarao

et al. 2004

J Americ Oil Chem Soc

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Membrane processing offers several advantages over conventional processes for edible oil refining. In recent years, processing solvent-extracted, screw-pressed, and used frying oils using nonporous denser polymeric composite membranes without pretreatment and addition of chemicals has been extensively investigated. In the present review, results obtained with real and model systems have been summarized and a comprehensive explanation is provided on the mechanism of rejection and differential permeation of oil constituents. Phospholipid-TG and pigment-TG systems are construed as conventional solute-solvent systems, and tocopherol-TG and FFA-TG systems are treated as liquid mixtures exhibiting differential permeability.Dense membrane theory appears more applicable than the reverse osmosis theory in qualitatively explaining the differential permeability of liquid constituents of the oil. Membrane processing of oils appears to have the potential to be a one-step process, especially for screw-pressed oils, in producing a premium-quality product. However, the development of suitable membranes that enable higher fluxes is necessary for industrial adoption of this technology.

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Membrane processing of used frying oils

Cited by 72 publications

References 4 publications

Effects of germination on chemical composition and antioxidant activity of flaxseed (<em>Linum usitatissimum</em> L) oil

Effects of germination on chemical composition and antioxidant activity of flaxseed (<em>Linum usitatissimum</em> L) oil

Recovery of used frying sunflower oil with sugar cane industry waste and hot water

Processing vegetable oils using nonporous denser polymeric composite membranes

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