Abstract
Acid oil, a by-product of vegetable oil refining, was enzymatically converted to fatty acid methyl esters (FAME). Acid oil contained free fatty acids (FFA), acylglycerols, and lipophilic compounds. First, acylglycerols (11 wt%) were hydrolyzed at 30 °C by 20 units Candida rugosa lipase/g-mixture with 40 wt% water. The resulting oil layer containing 92 wt% FFA was used for the next reaction, methyl esterification of FFA to FAME by immobilized Candida antarctica lipase. A mixture of 66 wt% oil layer and 34 wt% methanol (5 mol for FFA) were shaken at 30 °C with 1.0 wt% lipase. The degree of esterification reached 96% after 24 h. The resulting reaction mixture was then dehydrated and subjected to the second esterification that was conducted with 2.2 wt% methanol (5 mol for residual FFA) and 1.0 wt% immobilized lipase. The degree of esterification of residual FFA reached 44%. The degree increased successfully to 72% (total degree of esterification 99%) by conducting the reaction in the presence of 10 wt% glycerol, because water in the oil layer was attracted to the glycerol layer. Over 98% of total esterification was maintained, even though the first and the second esterification reactions were repeated every 24 h for 40 days. The enzymatic process comprising hydrolysis and methyl esterification produced an oil containing 91 wt% FAME, 1 wt% FFA, 1 wt% acylglycerols, and 7 wt% lipophilic compounds.
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References
Mittelbach M, Tritthart P (1988) Diesel fuel derived from vegetable-oils. 3. Emission tests using methyl-esters of used frying oil. J Am Oil Chem Soc 65:1185–1187
Haas MJ, Bloomer S, Scott K (2000) Simple, high-efficiency synthesis of fatty acid methyl esters from soapstock. Ibid 77:373–379
Watanabe Y, Shimada Y, Sugihara A, Tominaga Y (2001) Enzymatic conversion of waste edible oil to biodiesel fuel in a fixed-bed bioreactor. Ibid 78:703–707
Lee KT, Foglia TA, Chang KS (2002) Production of alkyl ester as biodiesel from fractionated lard and restaurant grease. Ibid 79:191–195
Hsu AF, Jones KC, Foglia TA, Marmer WN (2004) Transesterification activity of lipases immobilized in a phyllosilicate sol-gel matrix. Biotechnol Lett 26:917–921
Ghosh S, Bhattacharyya DK (1995) Utilization of acid oils in making valuable fatty products by microbial lipase technology. J Am Oil Chem Soc 72:1541–1544
Tueter M, Aksoy HA, Gilbaz EE, Kursun E (2004) Synthesis of fatty acid esters from acid oils using lipase B from Candida antarctica. Eur J Lipid Sci Technol 106:513–517
Watanabe Y, Pinsirodom P, Nagao T, Yamauchi A, Kobayashi T, Nishida Y, Takagi Y, Shimada Y (2007) Conversion of acid oil by-produced in vegetable oil refining to biodiesel fuel by immobilized Candida antarctica lipase. J Mol Catal B Enzym 44:99–105
Lai C-C, Zullaikah S, Vali SR, Ju Y-H (2005) Lipase-catalyzed production of biodiesel fuel from rice bran oil. J Chem Technol Biotechnol 80:331–337
Watanabe Y, Shimada Y, Sugihara A, Tominaga Y (2002) Conversion of degummed soybean oil to biodiesel fuel with immobilized Candida antarctica lipase. J Mol Catal B Enzym 17:151–155
Watanabe Y, Shimada Y, Baba T, Ohyagi N, Moriyama S, Terai T, Tominaga Y, Sugihara A (2002) Methyl esterification of waste fatty acids with immobilized Candida antarctica lipase. J Oleo Sci 51:655–661
Pizarro AVL, Park EY (2003) Lipase-catalyzed production of biodiesel fuel from vegetable oils contained in waste activated bleaching earth. Process Biochem 38:1077–1082
Haas JM, Michalski PJ, Runyon S, Nunez A, Scott KM (2003) Production of FAME from acid oil, a by-product of vegetable oil refining. J Am Oil Chem Soc 80:97–102
Dittmer JC, Lester RL (1964) A simple, specific spray for the detection of phospholipids on thin-layer chromatograms. J Lipid Res 5:126–127
Sugihara A, Shimada Y, Tominaga Y (1990) Separation and characterization of two molecular forms of Geotrichum candidum lipase. J Biochem 107:426–430
Shimada Y (2004) Lipases. In: Inoue K (ed) Food enzyme chemistry: its most up-to-date technology and application and perspectives to food proteomics. CMC Publishing Co., Tokyo, pp 172–183
Shimada Y, Watanabe Y, Samukawa T, Sugihara A, Noda H, Fukuda H, Tominaga Y (1999) Conversion of vegetable oil to biodiesel using immobilized Candida antarctica lipase. J Am Oil Chem Soc 76:789–793
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Authors would like to thank Dr. Pongsuda Pongtanya, National Center for Genetic Engineering and Biotechnology, Thailand, for her technical support.
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Watanabe, Y., Nagao, T., Nishida, Y. et al. Enzymatic Production of Fatty Acid Methyl Esters by Hydrolysis of Acid Oil Followed by Esterification. J Am Oil Chem Soc 84, 1015–1021 (2007). https://doi.org/10.1007/s11746-007-1143-4
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DOI: https://doi.org/10.1007/s11746-007-1143-4