Simultaneous use of urea and potassium nitrate for Arthrospira (Spirulina) platensis cultivation.
Biotechnol J
; 7(5): 649-55, 2012 May.
Article
em En
| MEDLINE
| ID: mdl-21905227
Urea has been considered as a promising alternative nitrogen source for the cultivation of Arthrospira platensis if it is possible to avoid ammonia toxicity; however, this procedure can lead to periods of nitrogen shortage. This study shows that the addition of potassium nitrate, which acts as a nitrogen reservoir, to cultivations carried out with urea in a fed-batch process can increase the maximum cell concentration (X(m) ) and also cell productivity (P(X) ). Using response surface methodology, the model indicates that the estimated optimum X(m) can be achieved with 17.3 mM potassium nitrate and 8.9 mM urea. Under this condition an X(m) of 6077 ± 199 mg/L and a P(X) of 341.5 ± 19.1 mg L(-1) day(-1) were obtained.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Ureia
/
Biotecnologia
/
Compostos de Potássio
/
Spirulina
/
Nitratos
Tipo de estudo:
Diagnostic_studies
/
Prognostic_studies
Idioma:
En
Revista:
Biotechnol J
Assunto da revista:
BIOTECNOLOGIA
Ano de publicação:
2012
Tipo de documento:
Article
País de afiliação:
Brasil
País de publicação:
Alemanha