Biodegradation of pentachlorophenol in an aerobic reactor

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

Autores

Moreira, JL (Autor) Outra; Alves, A (Autor) FEUP; Santos, L (Autor) FEUP

Revista

Título: Fresenius Environmental Bulletin

Vol. 15 Nº 4

Páginas: 301-305

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

Outras Informações

ID Authenticus: P-004-PQ2

Abstract (EN): Chlorophenols are considered to be priority pollutants by both the United States Environmental Protection Agency (US-EPA) and the European Union (EU), due to their high toxicity and mutagenic and carcinogenic properties. Therefore, the need arises to evaluate the biodegradation of pentachlorophenol (PCP), present in wastewaters in low concentrations (below 1 mg/l), and in the presence of other competitive carbon sources, in order to meet the demands of the current legislation for this type of discharges. An experiment was carried out with a 3-L continuously activated sludge reactor (hydraulic retention time of 4 h) using soil as the inoculum. The PCP concentration was analyzed by solid phase micro-extraction (SPME), followed by gas chromatography using an electron capture detector (GC/ECD). Chemical Oxygen Demand (COD) and optical density at 610 nm were also analyzed. The results show that 33 days after feeding the reactor with a synthetic sewage containing all the nutrients to its operation and PCP at a level of 106.3 mu g/L, the PCP removal stabilized in an average result of 51.1%. For a 200 mu g/L feed, no PCP removal was observed within the experimental period. The average COD removal in the reactor during this work was 65.5%, for an average COD feed of 189 mg/L.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 5