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Technical and economic feasibility of polyester dyeing wastewater treatment by coagulation/flocculation and Fenton's oxidation

Título
Technical and economic feasibility of polyester dyeing wastewater treatment by coagulation/flocculation and Fenton's oxidation
Tipo
Artigo em Revista Científica Internacional
Ano
2014
Autores
Rui A. R. Boaventura
(Autor)
FEUP
Luís M. Madeira
(Autor)
FEUP
Revista
Vol. 35 10
Páginas: 1307-1319
ISSN: 0959-3330
Editora: Taylor & Francis
Indexação
Publicação em ISI Web of Science ISI Web of Science
INSPEC
Classificação Científica
FOS: Ciências da engenharia e tecnologias > Engenharia química
CORDIS: Ciências Tecnológicas > Engenharia > Engenharia química
Outras Informações
ID Authenticus: P-009-5DN
Abstract (EN): This study aims to investigate the efficiency of individual and integrated processes applied to organic matter abatement and biodegradability improvement of a polyester dyeing wastewater, namely coagulation/flocculation combined with Fenton's reagent (Approach 1), Fenton oxidation alone (Approach 2) and its integration with coagulation/flocculation (Approach 3). The effects of Fe2+ dose, initial concentration of the oxidant (H2O2) and temperature during Fenton's oxidation were evaluated in Approaches 1 and 2, whereas in Approach 3 the influence of pH and flocculant dose was also assessed, during the coagulation/flocculation stage. Toxicity and biodegradability of the final effluent were also evaluated. After oxidation, a slight increase in the specific oxygen uptake rate of the effluent was observed (from 27.0 up to 28.5-30.0mg O-2/(g(VSS)h)) and the inhibition to Vibrio fischeri was eliminated. An effluent that complies with discharge standards was obtained in all cases; however, Approach 3 revealed to be a promising solution for treating this effluent as it leads to smaller operating costs. Therefore, the use of dissolved iron resulting from Fenton's oxidation as coagulant in the second stage was shown to be an innovative, efficient and economically attractive strategy for treating these effluents.
Idioma: Inglês
Tipo (Avaliação Docente): Científica
Nº de páginas: 13
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