Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/33280
Título: | Bioconversion of agro-industrial by-products in rhamnolipids toward applications in enhanced oil recovery and bioremediation |
Autor(es): | Gudiña, Eduardo J. Rodrigues, A. I. Alves, Eliana Domingues, M. R. M. Teixeira, J. A. Rodrigues, L. R. |
Palavras-chave: | Rhamnolipid Pseudomonas aeruginosa Molasses Corn step liquor Enhanced oil recovery Bioremediation Corn steep liquor |
Data: | Fev-2015 |
Editora: | Elsevier B.V. |
Revista: | Bioresource Technology |
Citação: | Gudiña, Eduardo J.; Rodrigues, A. I.; Alves, Eliana; Domingues, M. Rosário; Teixeira, J. A.; Rodrigues, L. R., Bioconversion of agro-industrial by-products in rhamnolipids towards applications in enhanced oil recovery and bioremediation. Bioresource Technology, 177, 87-93, 2015 |
Resumo(s): | In this work, biosurfactant production by a Pseudomonas aeruginosa strain was optimized using low-cost substrates. The highest biosurfactant production (3.2 g/l) was obtained using a culture medium containing corn step liquor (10% (v/v)) and molasses (10% (w/v)). The biosurfactant reduced the surface tension of water up to 30 mN/m, and exhibited a high emulsifying activity (E24= 60%), with a critical micelle concentration as low as 50 mg/l. The biosurfactant produced in this alternative medium was characterized as a mixture of eight different rhamnolipid congeners, being the most abundant the mono-rhamnolipid Rha-C10-C10. However, using LB medium, nine different rhamnolipid congeners were identified, being the most abundant the di-rhamnolipid Rha-Rha-C10-C10. The rhamnolipid mixture produced in the alternative medium exhibited a better performance in removing oil from contaminated sand when compared with two chemical surfactants, suggesting its potential use as an alternative to traditional chemical surfactants in enhanced oil recovery or bioremediation. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/33280 |
DOI: | 10.1016/j.biortech.2014.11.069 |
ISSN: | 0960-8524 |
e-ISSN: | 0960-8524 |
Versão da editora: | http://www.journals.elsevier.com/bioresource-technology/ |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
---|---|---|---|---|
document_19361_1.pdf | 736,55 kB | Adobe PDF | Ver/Abrir |