Abstract
A spent bleaching earth (SBE) from an edible oil refinery has been regenerated by thermal processing in oven, followed by washing with a cold solution of hydrochloric acid (1M). Optimal regeneration conditions have been controlled by decolorization tests of degummed and neutralized soybean oil. Optimal values of treatment (temperature 350°C, carbonization time 01 h, and HCl concentration 1M) gave a very efficient material. After bleaching oil by regenerated spent bleaching earth (RSBE), the chlorophyll-a and β-carotenes contained in crude edible oil and observed respectively at 430, 454, and 483 nm, value of λ max, are very much decreased. The results obtained after decolorization of edible oil by RSBE material indicate, that, during the process, the bleaching oil did not undergo any changes in the free fatty acid content. The peroxide value (PV) was reduced from 4.2 to 1.8 meq O2/kg, and the color has been improved (Lovibond color yellow/red: from 50/0.5 to 2.7/0.3, respectively). The RSBE material obtained was characterized by several techniques (FTIR, SEM). The results show that the heat treatment did not affect the mineral structure of RSBE, and the regenerated material recovered its porous structure.
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References
Akinwande BA, Salawuden TO, Arinkoola AO, Jimoh MO (2015) Effect of activation on clays and carbonaceous materials in vegetable oil bleaching: state of art review. BJAST 5(2):130–141. https://doi.org/10.9734/BJAST/2015/11942
AA AL-Z, Alhamed YA (2000) Oil removal from spent bleaching clay by solvent extraction. J Environ Sci Health A35:1577–1590. https://doi.org/10.1080/10934520009377056
Aung LL, Tertre E, Suksabye P, Worasith N, Thiravetyan P (2015) Effect of alumina content and surface area of acid-activated kaolin on bleaching of rice bran oil. J Am Oil Chem Soc 92:295–304. https://doi.org/10.1007/s11746-014-2583-2
AOCS (1998). Methods and recommended practices of the American Oil Chemists’ Society. Champaign
Boey PL, Ganesan S, Maniam GP (2011) Regeneration and reutilization of oil-laden spent bleaching clay via in situ transesterification and calcinations. J Am Oil Chem Soc 88(8):1247–1253. https://doi.org/10.1007/s11746-011-1781-4
Boukerroui A, Ouali MS (2000) Regeneration of a spent bleaching earth and its reuse in the refining of an edible oil. J Chem Technol Biotechnol 75:773–776
Caglayan MO, Kafa S, Yigit N (2005) Al-Pillared. Clay for Cottonseed Oil Bleaching: An Optimization Study JAOCS 82(8):599–602
Didi MA, Makhoukhi B, Azzouz A, Villemin D (2009) Colza oil bleaching through optimized acid activation of bentonite. A comparative study. Appl Clay Sci 42:336–344
Dijkstra AJ, (2013) Edible oil processing from a patent perspective, Chapter 7: Bleaching. Springer (ed) New York, pp173–198. https://doi.org/10.1007/978-1-4614-3351-4_7
Foletto EL, Paz DS, Gündel A (2013) Acid-activation assisted by microwave of a Brazilian bentonite and its activity in the bleaching of soybean oil. Appl Clay Sci 83–84:63–67. https://doi.org/10.1016/j.clay.2013.08.017
Gil B, Kim M, Kim JH, Yoon SH (2014) Comparative study of soybean oil refining using rice hull silicate and commercial adsorbents. Food Sci Biotechnol 23(4):1025–1028. https://doi.org/10.1007/s10068-014-0139-8
Kheok SC, Lim EE (1982) Mechanism of palm oil bleaching by montmorillonite clay activated at various acid concentrations. J Am Oil Chem Soc 59(3):129–131. https://doi.org/10.1007/BF02662259
Komadel P (2016) Acid activated clays: materials in continuous demand. Appl Clay Sci 131:84–99. https://doi.org/10.1016/j.clay.2016.05.001
Kondal RK, Subramanian R, Kawakatsu T, Nakajima M (2001) Decolorization of vegetable oils by membrane processing. Eur Food Res Technol 213:212–218. https://doi.org/10.1007/s0022170100353
Kreps F, Kyselka J, Burcova Z, Schmit S, Rajchl A, Filip V, Haz A, Jablonsky M, Sladkova A, Surina I (2016) Influence of deodorization temperature on formation of tocophenol esters and fatty acids polymers in vegetable oil. Eur J Lipid Sci Technol 118. https://doi.org/10.1002/ejlt.201600027
Kuck JC, Pons WA Jr, Frampton VL (1962) Reactivation of alumina used in bleaching of off-colored cottonseed oils. JAOCS 39:84–86
Kuleasan S, Tekin A (2008) Alkaline neutralization of crude soybean oil by various adsorbents Eur. J Lipid Sci Technol 110:261–265
Low KS, Lee CK, Wong AM (1996) Carbonized spent bleaching earth as a sorbent for some organic dyes. J Environ Sci Health A31(3):673–685. https://doi.org/10.1080/10934529609376380
Low KS, Lee CK, Kong LY (1998) Decolorization of crude palm oil by acid-activated spent bleaching earth. J Chem T echnol Biotechnol 72:67–73
Ma MH, Lin CI (2004) Adsorption kinetics of β-carotene from soy oil using regenerated clay. Sep Pur Technol 39:201–209. https://doi.org/10.1016/j.seppur.2003.12.007
Mana M, Ouali MS, De Menorval LC, Zajac JJ, Charnay C (2011) Regeneration of spent bleaching earth by treatment with cethyltrimethylammonium bromide for application in elimination of acid dye. Chem Eng J 174:275–280. https://doi.org/10.1016/j.cej.2011.09.026
Meziti C, Boukerroui A (2011) Regeneration of a solid waste from an edible oil refinery. Ceramics Int 37:1953–1957. https://doi.org/10.1016/j.ceramint.2011.02.016
Ng KF, Nair NK, Liew KY, Ahmad MN (1997) Surface and pore structure of deoiled acid and heat-treated spent bleaching clays. J Am Oil Chem Soc 74(8):963–970. https://doi.org/10.1007/s11746-997-0012-5
Pohndorf RS, Cadaval TRS Jr, Pinto LAA (2016) Kinetics and thermodynamics adsorption of carotenoids and chlorophylls in rice bran oil bleaching. J Food Eng 185:9–16. https://doi.org/10.1016/j.jfoodeng.2016.03.028
Pollard SJT, Sollard CJ, Perry R (1993) The reuse of spent bleaching earth: a feasibility study in waste minimization for the edible oil industry. Bioresour Technol 45:53–58
Pradas EG, Sanchez MV, Viciana MS, Campo AG (1994) Adsorption of chlorophyll-a from acetone solution on natural and activated bentonite. J Chem Technol Biotechnol 61:175–178
Rajam L, Soban Kumar DR, Sundaresan A, Arumughan C (2005) A novel process for physically refining rice bran oil through simultaneous degumming and dewaxing. J Am Oil Chem Soc 82(3):213–220
Rossi M, Gianazza M, Alamprese C, Stanga F (2003) The role of bleaching clays and synthetic silica in palm oil physical refining. Food Chem 82:291–296. https://doi.org/10.1016/S0308-8146(02)00551-4
Sarier N, Guler C (1988) β-carotene adsorption on acid activated montmorillonite. J Am Oil Chem Soc 65(5):776–790
Silva SM, Sampaio KA, Ceriani R, Verhé R, Stevens C, De Greyt W, Meirelles AJA (2013) Adsorption of carotenes and phosphorus from palm oil onto acid activated bleaching earth: equilibrium, kinetics and thermodynamics. J Food Eng 118:341–349. https://doi.org/10.1016/j.jfoodeng.2013.04.026
Silva SM, Sampaio KA, Ceriani R, Verhé R, Stevens C, De Greyt W, Meirelles AJA (2014) Effect of type of bleaching earth on the final color of refined palm oil. LWT-Food Sci Technol 59:1258–1264. https://doi.org/10.1016/j.lwt.2014.05.028
Skevin D, Domijan T, Kraljic K, Kljusuric JG, Nederal S, Obranovic M (2012) Optimization of bleaching parameters for soybean oil. Food Technol Biotechnol 50(2):199–207
Totani N, Iwanaga K, Takada M, Takeda O, Furuta M, Moriya M, Yamaguchi M, Ueda T (2004) Reclamation of used edible oil. J Oleo Sci 53(5):221–229
Tsai WT, Chen HP, Hsieh MF, Sun HF, Chien SF (2002) Regeneration of spent bleaching earth by pyrolysis in a rotary furnace. J Anal Appl Pyrolysis 63:157–170. https://doi.org/10.1016/S0165-2370(01)00150-4
Tsai WT, Chen HP, Hsien WY, Lai CW, Lee MS (2003) Thermochemical regeneration of bleaching earth waste with zinc chloride. Resour Conserv Recycl 39:65–77. https://doi.org/10.1016/S0921-3449(02)00121-0
Wambu EW, Muthakia GK, Wa-Thiong'o JK, Shiundu PM (2009) Regeneration of spent bleaching earth and its adsorption of copper (II) ions from aqueous solutions. Appl Clay Sci 46:176–180. https://doi.org/10.1016/j.clay.2009.07.022
Zaki I, Abdel-Khalik M, Habashi GM (1986) Acid leaching and consequent pore structure and bleaching capacity modifications of Egyptian clays. Colloid Surf 17:241–249
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Boukerroui, A., Belhocine, L. & Ferroudj, S. Regeneration and reuse waste from an edible oil refinery. Environ Sci Pollut Res 25, 18278–18285 (2018). https://doi.org/10.1007/s11356-017-9971-8
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DOI: https://doi.org/10.1007/s11356-017-9971-8