Bioaugmentation for treating transient 4-fluorocinnamic acid shock loads in a rotating biological contactor

• Tipo: Artigo em Revista Científica Internacional
• Data: 2013

Autores

Catarina L Amorim (Autor) Outra; Anouk F Duque (Autor) Outra; Carlos M M Afonso (Autor) FFUP; Paula M L Castro (Autor) Outra

Revista

Título: Bioresource Technology

Vol. 144

Páginas: 554-562

ISSN: 0960-8524

Editora: Elsevier

Indexação

ISI Web of Knowledge - 11 Citações

Scopus - 13 Citações

Classificação Científica

FOS: Ciências agrárias > Biotecnologia agrária e alimentar

Outras Informações

ID Authenticus: P-006-7HQ

DOI: 10.1016/j.biortech.2013.07.010

Abstract (EN): A rotating biological contactor (RBC) was used to treat shock loadings of 4-fluorocinnamic acid (4-FCA). Intermittent 4-FCA shocks of 35 mg L-1 were applied (ca. 3 months) with only limited mineralization occurring and accumulation of 4-fluorobenzoate (4-FBA) as an intermediate. After bioaugmentation with a degrading bacterium the RBC was able to deal with 4-FCA intermittent loading of 80 mg L-1 however, a gradual decline in RBC performance occurred, leading to 4-FBA accumulation. The degrading strain was recovered from the biofilm during 2 months but intermittent feeding may have led to diminishing strain numbers. Distinct bacterial communities in the 1st and the 5th and 10th stages of the RBC were revealed by denaturating gradient gel electrophoresis. Several isolates retrieved from the RBC transformed 4-FCA into 4-FBA but only two strains mineralized the compound. Bioaugmentation allowed removal of the fluorinated compound however intermittent feeding may have compromised the bioreactor efficiency.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 9