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https://hdl.handle.net/1822/2210
Título: | Reductive biological treatment of textile effluents |
Autor(es): | Ramalho, Patrícia A. Ramalho, Maria Teresa Cardoso, M. Helena Paulo, Artur Cavaco |
Palavras-chave: | Reductive biodegradation Azo dyes Textile effluents |
Data: | Jun-2004 |
Resumo(s): | Azo dyes are synthetic organic colorants which are extensively used in textile, food and cosmetic industries. A large fraction of these dyes is released into the environment even after conventional wastewater treatments. This is a worldwide problem and particularly a problem in regions where textile industries release large quantities of coloured wastewater to water courses. In an attempt to develop a biological treatment for colour removal we isolated several ascomycete yeast strains from contaminated soil based on its capacity to decolourize soluble azo dyes. In a study with four selected strains the growth rates, pH effect, temperature effect and decolourizing capacity were compared. We have demonstrated that the colour loss was due to a reductase activity, expressed constitutively, which could transform azo dyes into colourless amines [1]. The fate of the formed amines and the use of alternative carbon sources were also investigated. [1] Ramalho, P.A., Scholze, H., Cardoso, M.H., Ramalho, M.T., Oliveira-Campos, A.M. 2002 Improved conditions for the aerobic reductive decolourization of azo dyes by Candida zeylanoides. Enz Microbiol Technol 31: 848-854. |
Tipo: | Comunicação oral |
Descrição: | 3rd International Conference on Textile Biotechnology, Graz, Áustria, 13-16 Junho 2004. |
URI: | https://hdl.handle.net/1822/2210 |
Acesso: | Acesso aberto |
Aparece nas coleções: | CDQuim - Comunicações e Proceedings DBio - Comunicações/Communications in Congresses |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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Apresentação Austria 04.pdf | 310,57 kB | Adobe PDF | Ver/Abrir |