| Registro completo |
| Provedor de dados: |
BJM
|
| País: |
Brazil
|
| Título: |
Aeration effect on Spirulina platensis growth and γ-linolenic acid production
|
| Autores: |
Ronda,Srinivasa Reddy
Bokka,Chandra Sekhar
Ketineni,Chandrika
Rijal,Binod
Allu,Prasada Rao
|
| Data: |
2012-03-01
|
| Ano: |
2012
|
| Palavras-chave: |
Spirulina platensis
Aeration
Photobioreactor
Gamma-linolenic acid
|
| Resumo: |
The influence of aeration on algal growth and gamma-linolenic acid (GLA) production in a bubble column photobioreactor was investigated. Studies were performed in a 20-L reactor at different aeration rates (0.2-2.5 vvm). Static, continuous, and periodic operation of air resulted in 41.9%, 88.4%, and 108% air saturation of dissolved oxygen, for which the corresponding values of GLA were 2.3, 6.5, and 7.5 mg·g-1 dry cell weight, respectively. An increase in the aeration rate from 0.2 to 2.5 vvm enhanced both the specific growth rate and GLA content under periodic sparging in the bicarbonate medium. With a 6-fold increase in the aeration rate, the GLA content of the alga increased by 69.64% (5.6-9.5 mg· g-1 dry cell weight). In addition, the total fatty acid (TFA) content in dry biomass increased from 2.22% to 4.41%, whereas the algae maintained a constant GLA to TFA ratio within the aeration rate tested. The dependence of GLA production on the aeration rate was explained by interrelating the GLA production rate with the specific growth rate using the Luedeking and Piret mixed growth model.
|
| Tipo: |
Info:eu-repo/semantics/article
|
| Idioma: |
Inglês
|
| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822012000100002
|
| Editor: |
Sociedade Brasileira de Microbiologia
|
| Relação: |
10.1590/S1517-83822012000100002
|
| Formato: |
text/html
|
| Fonte: |
Brazilian Journal of Microbiology v.43 n.1 2012
|
| Direitos: |
info:eu-repo/semantics/openAccess
|
