Optimization of coagulation-flocculation and flotation parameters for the treatment of a petroleum refinery effluent from a Portuguese plant

• Tipo: Artigo em Revista Científica Internacional
• Data: 2012

Autores

Carlos E. Santo (Autor) Outra; Vítor J.P. Vilar (Autor) FEUP; Cidália M. S. Botelho (Autor) FEUP; Amit Bhatnagar (Autor) Outra; Eva Kumar (Autor) Outra; Rui A. R. Boaventura (Autor) FEUP

Revista

Título: Chemical Engineering Journal

Vol. 183

Páginas: 117-123

ISSN: 1385-8947

Editora: Elsevier

Indexação

ISI Web of Knowledge - 66 Citações

ISI Web of Science

Scopus - 105 Citações

INSPEC

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia do ambiente

CORDIS: Ciências Tecnológicas > Engenharia > Engenharia química

Projetos Associados

LA 20 - Projeto Estratégico-LA 20 - 2011-2012

Outras Informações

ID Authenticus: P-002-D0D

DOI: 10.1016/j.cej.2011.12.041

Abstract (EN): Petroleum refineries generate significant amounts of wastewater which have to be treated and processed before their discharge into water streams. The refinery wastewater treatment plants (WWTPPs) employ physico-chemical processes to achieve effluents of satisfactory oil content to be further treated by biological processes. In the present study, coagulation-flocculation and flotation processes are optimised to reduce the concentrations of organic matter, oil and grease and other contaminants in order to obtain an effluent with suitable characteristics ready to be treated by an aerobic biological process. PAX-18 (17% Al2O3), aluminium sulphate (Al-2(SO4)(3)) and ferric sulphate (Fe-2(SO4)(3)) are chosen for affecting coagulation-flocculation as a primary treatment. NALCO 71408 is employed as flocculant. Treatment efficiency is evaluated in terms of chemical oxygen demand (COD), total organic carbon (TOC) and turbidity measurements. The experiments are conducted both in discontinuous and continuous mode to assess the feasibility of the process. Flotation is investigated as a post-treatment process for the removal of emulsified hydrocarbons and satisfactory results are obtained.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 7