Simultaneous use of urea and potassium nitrate for Arthrospira (Spirulina) platensis cultivation

Autor(es)

Vieira, Denise C. M. ; Matsudo, Marcelo C. ; Sato, Sunao ; Converti, Attilio ; de Carvalho, Joao C. M.

• Tipo de documento: Artigo Científico
• Fonte: Biotechnology Journal; v. 7, n. 5, p. 7-pg., 2012-05-01.

Resumo

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 (Xm) and also cell productivity (PX). Using response surface methodology, the model indicates that the estimated optimum Xm can be achieved with 17.3 mM potassium nitrate and 8.9 mM urea. Under this condition an Xm of 6077 +/- 199 mg/L and a PX of 341.5 +/- 19.1 mg L1day1 were obtained. (AU)

• Processo FAPESP: 05/52255-6 - Avaliação do cultivo de Spirulina platensis utilizando simultaneamente duas fontes de nitrogênio
• Beneficiário: João Carlos Monteiro de Carvalho
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 05/52269-7 - Avaliação do cultivo de Spirulina platensis utilizando simultaneamente nitrato de potássio e ureia como fontes de nitrogênio
• Beneficiário: Denise Cristina Moretti Vieira
• Modalidade de apoio: Bolsas no Brasil - Mestrado