Biodegradation of nonylphenol in sewage sludge.
Chemosphere
; 60(11): 1652-9, 2005 Sep.
Article
em En
| MEDLINE
| ID: mdl-16083772
ABSTRACT
We investigated the effects of various factors on the aerobic degradation of nonylphenol (NP) in sewage sludge. NP (5 mg/kg) degradation rate constants (k1) calculated were 0.148 and 0.224 day(-1) for the batch experiment and the bioreactor experiment, respectively, and half-lives (t(1/2)) were 4.7 and 3.1 days, respectively. The optimal pH value for NP degradation in sludge was 7.0 and the degradation rate was enhanced when the temperature was increased and when yeast extract (5 mg/l) and surfactants such as brij 30 or brij 35 (55 or 91 microM) were added. The addition of aluminum sulfate (200 mg/l) and hydrogen peroxide (1 mg/l) inhibited NP degradation within 28 days of incubation. Of the microorganism strains isolated from the sludge samples, we found that strain CT7 (identified as Bacillus sphaericus) manifested the best degrading ability.
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Base de dados:
MEDLINE
Assunto principal:
Fenóis
/
Esgotos
Tipo de estudo:
Prognostic_studies
Idioma:
En
Revista:
Chemosphere
Ano de publicação:
2005
Tipo de documento:
Article
País de afiliação:
Taiwan