Synthetic olive mill wastewater treatment by Fenton's process in batch and continuous reactors operation

• Tipo: Artigo em Revista Científica Internacional
• Data: 2018

Autores

Bruno M. Esteves (Autor) FEUP; Carmen S. D. Rodrigues (Autor) FEUP; Luís M. Madeira (Autor) FEUP

Revista

Título: Environmental Science and Pollution Research

Vol. 25 Nº 35

Páginas: 34826-34838

ISSN: 0944-1344

Editora: Springer Nature

Indexação

ISI Web of Knowledge - 22 Citações

ISI Web of Science

Scopus - 27 Citações

Projetos Associados

LEPABE-2-ECO-INNOVATION - LEPABE-2-ECO-INNOVATION

Outras Informações

ID Authenticus: P-00N-6PW

DOI: 10.1007/s11356-017-0532-y

Abstract (EN): Degradation of total phenol (TPh) and organic matter, (expressed as total organic carbon TOC), of a simulated olive mill wastewater was evaluated by the Fenton oxidation process under batch and continuous mode conditions. A mixture of six phenolic acids usually found in these agroindustrial wastewaters was used for this purpose. The study focused on the optimization of key operational parameters of the Fenton process in a batch reactor, namely Fe2+ dosage, hydrogen peroxide concentration, pH, and reaction temperature. On the assessment of the process efficiency, > 99% of TPh and > 56% of TOC removal were attained when [Fe2+] = 100 ppm, [H2O2] = 2.0 g/L, T = 30 °C, and initial pH = 5.0, after 300 min of reaction. Under those operational conditions, experiments on a continuous stirred-tank reactor (CSTR) were performed for different space-time values (¿). TOC and TPh removals of 47.5 and 96.9%, respectively, were reached at steady-state (for ¿ = 120 min). High removal of COD (> 75%) and BOD5 (> 70%)was achieved for both batch and CSTR optimum conditions; analysis of the BOD5/COD ratio also revealed an increase in the effluent¿s biodegradability. Despite the high removal of lumped parameters, the treated effluent did not met the Portuguese legal limits for direct discharge of wastewaters into water bodies, which indicates that coupled chemical-biological process may be the best solution for real olive mill wastewater treatment.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 13