Biodegradation of 2,4-dichlorophenol in an aerobic reactor

• Type: Article in International Scientific Journal
• Date: 2006

Authors

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

Journal

Title: Fresenius Environmental Bulletin

Vol. 15 No. 4

Pages: 289-294

ISSN: 1018-4619

Publisher: Technische Universitat Munchen

Indexing

ISI Web of Knowledge - 3 Citations

ISI Web of Science

Scopus - 3 Citations

Scientific classification

FOS: Natural sciences > Earth and related Environmental sciences

CORDIS: Technological sciences > Engineering > Chemical engineering ; Natural sciences

Other information

Authenticus ID: 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6