Growth of the microalgae Neochloris oleoabundans at high partial oxygen pressures and sub-saturating light intensity.
Bioresour Technol
; 104: 565-70, 2012 Jan.
Article
em En
| MEDLINE
| ID: mdl-22079686
ABSTRACT
The effect of partial oxygen pressure on growth of Neochloris oleoabundans was studied at sub-saturating light intensity in a fully-controlled stirred tank photobioreactor. At the three partial oxygen pressures tested (P(O)2= 0.24; 0.63; 0.84 bar), the specific growth rate was 1.38; 1.36 and 1.06 day(-1), respectively. An increase of the P(CO)2from 0.007 to 0.02 bar at P(O2) of 0.84 bar resulted in an increase in the growth rate from 1.06 to 1.36 day(-1). These results confirm that the reduction of algal growth at high oxygen concentrations at sub-saturating light conditions is mainly caused by competitive inhibition of Rubisco. This negative effect on growth can be overcome by restoring the O(2)/CO(2) ratio by an increase in the partial carbon dioxide pressure. In comparison to general practice (P(O(2)) = 0.42 bar), working at partial O(2) pressure of 0.84 bar could reduce the energy requirement for degassing by a factor of 3-4.
Texto completo:
1
Bases de dados:
MEDLINE
Assunto principal:
Oxigênio
/
Volvocida
/
Reatores Biológicos
/
Fotobiorreatores
Idioma:
En
Revista:
Bioresour Technol
Assunto da revista:
ENGENHARIA BIOMEDICA
Ano de publicação:
2012
Tipo de documento:
Article
País de afiliação:
Holanda