Biosurfactant production by Rhodococcus erythropolis and its application to oil removal
Braz. j. microbiol
;
41(3): 685-693, Oct. 2010. ilus, graf, tab
Artigo
em Inglês
| LILACS
| ID: lil-549410
ABSTRACT
The influence of different nutrients on biosurfactant production by Rhodococcus erythropolis was investigated. Increasing the concentration of phosphate buffer from 30 up through 150 mmol/L stimulated an increase in biosurfactant production, which reached a maximum concentration of 285 mg/L in shaken flasks. Statistical analysis showed that glycerol, NaNO3,MgSO4 and yeast extract had significant effects on production. The results were confirmed in a batchwise bioreactor, and semi-growth-associated production was detected. Reduction in the surface tension, which indicates the presence of biosurfactant, reached a value of 38 mN/m at the end of 35 hours. Use of the produced biosurfactant for washing crude oil-contaminated soil showed that 2 and 4 times the critical micellar concentration (CMC) were able to remove 97 and 99 percent of the oil, respectively, after 1 month of impregnation.
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Arquivos
/
Biodegradação Ambiental
/
Rhodococcus
/
Petróleo
/
Indústria Química
/
Remoção de Contaminantes
/
Hidrocarbonetos
Idioma:
Inglês
Revista:
Braz. j. microbiol
Assunto da revista:
Microbiologia
Ano de publicação:
2010
Tipo de documento:
Artigo
País de afiliação:
Brasil
Instituição/País de afiliação:
Universidade Federal do Rio de Janeiro/BR
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