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https://hdl.handle.net/1822/80877
Título: | Cost-effective rhamnolipid production by Burkholderia thailandensis E264 using agro-industrial residues |
Autor(es): | Correia, Jéssica Gudiña, Eduardo José Lazar, Zbigniew Janek, Tomasz Teixeira, J. A. |
Palavras-chave: | Bioremediation Biosurfactant Circular economy Corn steep liquor Emulsification Olive mill wastewater |
Data: | Out-2022 |
Editora: | Springer |
Revista: | Applied Microbiology and Biotechnology |
Citação: | Correia, J., Gudiña, E.J., Lazar, Z. et al. Cost-effective rhamnolipid production by Burkholderia thailandensis E264 using agro-industrial residues. Appl Microbiol Biotechnol 106, 7477–7489 (2022). https://doi.org/10.1007/s00253-022-12225-1 |
Resumo(s): | The agro-industrial by-products corn steep liquor (CSL) and olive mill wastewater (OMW) were evaluated as low-cost substrates for rhamnolipid production by Burkholderia thailandensis E264. In a culture medium containing CSL (7.5% (v/v)) as sole substrate, B. thailandensis E264 produced 175 mg rhamnolipid/L, which is about 1.3 times the amount produced in the standard medium, which contains glycerol, peptone, and meat extract. When the CSL medium was supplemented with OMW (10% (v/v)), rhamnolipid production further increased up to 253 mg/L in flasks and 269 mg/L in a bioreactor. Rhamnolipids produced in CSL+OMW medium reduced the surface tension up to 27.1 mN/m, with a critical micelle concentration of 51 mg/L, better than the values obtained with the standard medium (28.9 mN/m and 58 mg/L, respectively). However, rhamnolipids produced in CSL+OMW medium displayed a weak emulsifying activity when compared to those produced in the other media. Whereas di-rhamnolipid congeners represented between 90 and 95% of rhamnolipids produced by B. thailandensis E264 in CSL and the standard medium, the relative abundance of mono-rhamnolipids increased up to 55% in the culture medium containing OMW. The difference in the rhamnolipid congeners produced in each medium explains their different surface-active properties. To the best of our knowledge, this is the first report of rhamnolipid production by B. thailandensis using a culture medium containing agro-industrial by-products as sole ingredients. Furthermore, rhamnolipids produced in the different media recovered around 60% of crude oil from contaminated sand, demonstrating its potential application in the petroleum industry and bioremediation. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/80877 |
DOI: | 10.1007/s00253-022-12225-1 |
ISSN: | 0175-7598 |
Versão da editora: | https://link.springer.com/article/10.1007/s00253-022-12225-1 |
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 | |
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document_55834_1.pdf | 1,48 MB | Adobe PDF | Ver/Abrir |