Degradação de corantes azo por processo enzimático (peroxidase de Brassica rapa) e biofiltro anaeróbio-aeróbio

Detalhes bibliográficos
Ano de defesa: 2018
Autor(a) principal: Almaguer, Mairely Alfonso
Orientador(a): Não Informado pela instituição
Banca de defesa: Não Informado pela instituição
Tipo de documento: Dissertação
Tipo de acesso: Acesso aberto
Idioma: por
Instituição de defesa: Universidade Federal do Rio de Janeiro
Brasil
Instituto Alberto Luiz Coimbra de Pós-Graduação e Pesquisa de Engenharia
Programa de Pós-Graduação em Engenharia Química
UFRJ
Programa de Pós-Graduação: Não Informado pela instituição
Departamento: Não Informado pela instituição
País: Não Informado pela instituição
Palavras-chave em Português:
Link de acesso: http://hdl.handle.net/11422/12849
Resumo: In this study, the potential of a turnip peroxidase (Brassica rapa) in catalyze the degradation of the textile azo dyes Crystal Ponceau 6R (CP6R) and Reactive Red 239 (RR239) was evaluated. The optimum parameters of the enzymatic oxidation of CP6R and RR239 dyes were determined. The enzyme showed to be a highly e ective catalyst in discoloration of CP6R dye at pH 3, 4 and 5. However, the optimum pH for both dyes was found to be 4. The optimal contact time for removal of CP6R and RR239 was 0.75 min and 48.3 min, respectively. Under optimal conditions, 98% color removal was achieved for CP6R and 79% for RR239. The results showed that RR239 dye is much more resistant to degradation by the used peroxidase. The degradation of a synthetic wastewater containing the RR239 dye by means of sequential biological - enzymatic (B+E) and enzymatic - biological (E+B) treatment was also investigated in this work. The enzymatic process was the main responsible for the removal of color, although it was not e ective in the removal of organic matter. The biological process (anaerobic-aerobic bio lter) facilitated the removal of COD (anaerobic reactor) and ammonium (aerobic reactor). The B+E sequential treatment was e ective in the degradation of the wastewater and exhibited better performance than the E+B treatment, reaching color, COD and ammonium removal percentages of 94%, 90% and 98%, respectively.