Enhancement of hydrocarbon waste biodegradation by addition of a biosurfactant from Bacillus subtilis O9.
Biodegradation
; 11(1): 65-71, 2000.
Article
em En
| MEDLINE
| ID: mdl-11194975
A non-sterile biosurfactant preparation (surfactin) was obtained from a 24-h culture of Bacillus subtilis O9 grown on sucrose and used to study its effect on the biodegradation of hydrocarbon wastes by an indigenous microbial community at the Erlenmeyer-flask scale. Crude biosurfactant was added to the cultures to obtain concentrations above and below the critical micelle concentration (CMC). Lower concentration affected neither biodegradation nor microbial growth. Higher concentration gave higher cell concentrations. Biodegradation of aliphatic hydrocarbons increased from 20.9 to 35.5% and in the case of aromatic hydrocarbons from nil to 41%, compared to the culture without biosurfactant. The enhancement effect of biosurfactant addition was more noticeable in the case of long chain alkanes. Pristane and phytane isoprenoids were degraded to the same extent as n-C17 and n-C18 alkanes and, consequently, no decrease in the ratios n-C17/pri and n-C18/phy was observed. Rapid production of surfactin crude preparation could make it practical for bioremediation of ship bilge wastes.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Peptídeos Cíclicos
/
Tensoativos
/
Bacillus subtilis
/
Proteínas de Bactérias
/
Hidrocarbonetos
Tipo de estudo:
Evaluation_studies
Idioma:
En
Revista:
Biodegradation
Assunto da revista:
BIOQUIMICA
/
SAUDE AMBIENTAL
Ano de publicação:
2000
Tipo de documento:
Article
País de afiliação:
Argentina
País de publicação:
Holanda