Effect of process parameters on production of a biopolymer by Rhizobium sp.

• Tipo: Artigo em Livro de Atas de Conferência Internacional
• Data: 2004

Autores

Duta, FP (Autor) Outra; De Franca, FP (Autor) Outra; Servulo, EFC (Autor) Outra; Lopes, LMD (Autor) Outra; Da Costa, ACA (Autor) Outra; Barros, A (Autor) Outra

Ata de Conferência Internacional

Título: APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY

Páginas: 639-652

25th Symposium on Biotechnology for Fuels and Chemicals

Breckenridge, CO, MAY 04-07, 2003

Indexação

ISI Web of Knowledge - 14 Citações

Scopus - 17 Citações

Outras Informações

ID Authenticus: P-000-B9N

DOI: 10.1385/abab:114:1-3:639

Abstract (EN): The production of biopolymers by a Rhizobium strain was studied under batch and bioreactor conditions. The best viscosity levels were obtained under low mannitol concentrations as well as low agitation and aeration conditions. Infrared spectra indicated the presence of chemical groups characteristic of microbially produced biopolymers, including C = O and O-acetyl groups. Thermogravimetric analysis showed the characteristic degradation profiles of the exopolysaccharide produced (T-onset = 290degreesC). The experimental design showed that a low substrate concentration (10.0 g/L), and low aeration (0.2 vvm) and agitation (200 rpm) levels should be used. The maximum yield of the process was a Yp/s (g/g) of 0.19 +/- 0.1, obtained under optimized conditions.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 14