Biodegradation of 2,4-dichlorophenol in an aerobic reactor

• Tipo: Artigo em Revista Científica Internacional
• Data: 2006

Autores

Moreira, JL (Autor) Outra; Polidoro, AM (Autor) Outra; Heitor, C (Autor) Outra; Nunes, OC (Autor) FEUP; Alves, A (Autor) FEUP; Santos, L (Autor) FEUP

Revista

Título: Fresenius Environmental Bulletin

Vol. 15 Nº 4

Páginas: 289-294

ISSN: 1018-4619

Editora: Technische Universitat Munchen

Indexação

ISI Web of Knowledge - 3 Citações

ISI Web of Science

Scopus - 3 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Ciências da terra e ciências do ambiente

CORDIS: Ciências Tecnológicas > Engenharia > Engenharia química ; Ciências Naturais

Outras Informações

ID Authenticus: P-004-PQ1

Abstract (EN): The aim of this work was the bioremediation of 2,4-dichlorophenol (2,4-DCP), in order to accomplish the current national legislation for this type of discharges (minimum quality objective of 20 mu g/l). An experiment was performed in a 3-l continuous aerobic reactor with an hydraulic retention time (HRT) of 4 hours, using a pure culture strain of Ralstonia basilensis DSM 11853(T) as the inoculum, under non-sterile conditions. The study was carried out in the presence of other competitive carbon sources, using a synthetic sewage to feed the reactor, thus simulating a real wastewater. The 2,4-DCP concentrations in the reactor inlet and clarifier outlet were analysed by solid phase micro-extraction (SPME), followed by gas chromatography using an electron capture detector (ECD). The results demonstrated that 2,4-DCP treatment efficiency was 90.1% 79.5% and 84.1% for feed concentrations of 1000, 500 and 200 go, respectively. Removal of organic matter was evaluated by the chemical oxygen demand (COD), and an average COD removal of 62.4% was achieved for an average COD feeding of 187 mg O-2/l. The results of this work suggest that 2,4-DCP can be degraded by micro-organisms, and are promising in the sense of using this system for the cleanup of real wastewaters.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 6