Res. Agr. Eng., 2010, 56(3):122-125 | DOI: 10.17221/40/2009-RAE

Lipase-catalyzed transesterification of rendering plant fat - Short Communication

A. Prošková1, Z. Kopicová1, J. Kučera1, L. Škarková2
1 Food Research Institute Prague, Prague, Czech Republic
2 Faculty of Engineering, Czech University of Life Sciences Prague, Prague, Czech Republic

Soluble lipase (Lipozyme CALB L) was immobilized by covalent bond to chitosan pellets prepared from Aspergillus niger mycelium. This immobilized enzyme was compared with commercial immobilized lipase of the same origin (Novozym 435). Novozym 435 is also lipase CALB L commercially immobilized by sorption on poly-(methyl acrylate). Novozym 435 shows much higher conversion of rendering plant fat in methanol under optimum conditions, having, at the same time, lower optimum temperature and lower stability at higher temperature. Lipozyme CALB L immobilized on chitosan leads to a low conversion, regardless its higher thermal stability. Novozym 435 gives conversion of about 50% of theoretical value, which is in good accordance with basically catalyzed transesterification of rendering plant fat described elsewhere. Lipozyme CALB L immobilized on chitosan gives conversion of about 10% of theoretical value only. The use of Novozym 435 in two-step system (enzyme-acid) seems to be more convenient compared with traditional two-step system (base-acid)

Keywords: biofuel; biodiesel; rendering plant fat; transesterification; lipase

Published: September 30, 2010  Show citation

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Prošková A, Kopicová Z, Kučera J, Škarková L. Lipase-catalyzed transesterification of rendering plant fat - Short Communication. Res. Agr. Eng. 2010;56(3):122-125. doi: 10.17221/40/2009-RAE.
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