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

Abstract

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.

Regeneration of Used Frying Palm Oil with Coffee Silverskin (CS), CS Ash (CSA) and Nanoparticles of CS (NCS)

“…The upper oil phase was separated by centrifugation at 10,000 rpm for 20 min. 8 . The centrifuged oil was vacuum filtered through a cotton filter cloth.…”

“…The peroxide value of used frying palm oil without applying treatments was 26.9 meq/kg, which, is higher than the peroxide maximum 10 meq/kg for vegetable oil deterioration 27 . Oxidation after deep-fat frying process results in the formation of hydroperoxide molecules 4,5,8 . Several studies suggest the necessity to remove peroxides compounds from deteriorated fried oils 8 11 .…”

“…Recovery of used frying oil can provide significant savings for food manufacturers 8,9 . Different adsorbents including active carbon of date palm seeds, silica, clay, diatomaceous earth clay, charcoal, sugar cane industry waste ash, rice husk ash, oyster shell, kaolin, calcined magnesium hydroxide and Magnesol XL have been used to regenerate the quality of used frying oil 8 12 .…”

“…The major advantage of using low cost adsorbents is that, they can be used in treatment process, then disposed of without any associated costs for regeneration 6,8,12 . Coffee silverskin CS is a thin integument of the outer layer of green coffee beans obtained as a by-product of the roasting process and represents about 4.2 w/w of coffee beans 14 .…”

Stabilization of Neem Oil Biodiesel with Corn Silk Extract during Long-term Storage

“…The centrifuged oil was stirred with the anhydrous sodium sulfate for ca. 5 min, and then filtered vacuum filtration through a Whatman No 1 paper 27 .…”