In the Mediterranean basin countries, huge amounts of olive mill wastewaters (OMW) are produced by the olive oil industry. It constitutes a serious environmental problem, nevertheless its composition turns OMW into a potential growth medium to lipolytic microorganisms. The aim of this work was to study lipase production as well as OMW degradation in fed-batch cultures of Candida cylindracea CBS 7869, Candida rugosa CBS 2275 and Yarrowia lipolytica W29 (ATCC 20460). Besides the improvement of lipase production, the fed-batch approach enhanced the effluent degradation, since it led to good COD and lipids reduction, both higher than 50%. C. rugosa achieved the highest value of lipase productivity (130 U L −1 h −1 ), in parallel with highest lipids reduction (77%). This study demonstrates that OMW are becoming a competitive and valuable growth medium in fermentation processes with lipolytic microorganisms. The fed-batch strategy used proved to be an efficient approach to enhance lipase production from OMW and to reduce significantly the final organic load of the medium.
Estudo das políticas de qualidade no ensino superior brasileiro e europeu com o objetivo de discutir e comparar os sistemas de acreditação e de avaliação na Alemanha, Reino Unido e Brasil. Assim, contextualiza e mapeia os cenários dos países e discute os mecanismos de garantia da qualidade nos processos de avaliação e acreditação do ensino superior. Trata-se de uma pesquisa descritiva em que buscou-se o what is, previsto por Knupfer e McLellan (1996, p.1197) retratando “[...] o que existe hoje e agora em relação a um problema ou fenômeno.” (MERTENS, 1998, p.174). Os resultados demonstraram algumas similaridades nos mecanismos de garantia da qualidade mesmo considerando-se as políticas educacionais distintas. As contribuições assentam na confrontação das metodologias de acreditação e avaliação em vigor pelas agências dos países e na análise quanto à forma de validação das políticas de qualidade no ensino superior
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