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Enzyme Research
Volume 2013, Article ID 324061, 6 pages
http://dx.doi.org/10.1155/2013/324061
Research Article

Stability of a Lipase Extracted from Seeds of Pachira aquatica in Commercial Detergents and Application Tests in Poultry Wastewater Pretreatment and Fat Particle Hydrolysis

Department of Chemistry and Environmental Sciences, IBILCE-UNESP, State University of São Paulo, Rua Cristóvão Colombo 2265, 15054-000 São José do Rio Preto, SP, Brazil

Received 13 September 2013; Revised 25 November 2013; Accepted 25 November 2013

Academic Editor: Giovanni Gadda

Copyright © 2013 Patrícia Peres Polizelli et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A protein extract containing a plant lipase from oleaginous seeds of Pachira aquatica was tested using soybean oil, wastewater from a poultry processing plant, and beef fat particles as substrate. The hydrolysis experiments were carried out at a temperature of 40°C, an incubation time of 90 minutes, and pH 8.0-9.0. The enzyme had the best stability at pH 9.0 and showed good stability in the alkaline range. It was found that P. aquatica lipase was stable in the presence of some commercial laundry detergent formulations, and it retained full activity up to 0.35% in hydrogen peroxide, despite losing activity at higher concentrations. Concerning wastewater, the lipase increased free fatty acids release by 7.4 times and promoted the hydrolysis of approximately 10% of the fats, suggesting that it could be included in a pretreatment stage, especially for vegetable oil degradation.