Indoor cultures of Stichococcus bacillaris were carried out to investigate the effect of pH, CO2, and hydrodynamics on biomass and biodiesel productivity in a 0.6L vertical bubble column (VBC) and a 1.7L inclined bubble column (IBC) photobioreactor. The temperature and the irradiance level were set at 23°C and 300micronE/(m2s), respectively. The pH of the liquid culture was in the range 3.0-8.5. The CO2 concentration in the gas phase was increased up to 15%, typical of exhaust gas from power plants. The increased CO2 concentration in the gas phase stimulated the microalgal growth. Tests carried out at different pH and spreading a 5% CO2 gas stream showed that the biomass productivity was maximum at a pH of about 7.0. Acid and alkaline conditions can also be adopted with an approximate 25% decrease in biomass productivity. The comparison between a IBC and a VBC reactor operated under the same conditions pointed out that the performances of IBC were higher than those of VBC: 0.26gbiomass/(Ld) and 0.032gFAME/(Ld) for IBC, and 0.124gbiomass/(Ld) and 0.010gFAME/(Ld) for VBC. IBC was characterized by an intensive liquid circulation that promotes a continuous renewal of microalgal cells in the photic zone. �� 2013 Elsevier B.V.
Effects of photobioreactors design and operating conditions on Stichococcus bacillaris biomass and biodiesel production / Olivieri, Giuseppe; Gargano, Immacolata; Andreozzi, Roberto; Marotta, Raffaele; Marzocchella, Antonio; Pinto, Gabriele; Pollio, Antonino. - In: BIOCHEMICAL ENGINEERING JOURNAL. - ISSN 1369-703X. - 74:(2013), pp. 8-14. [10.1016/j.bej.2013.02.006]
Effects of photobioreactors design and operating conditions on Stichococcus bacillaris biomass and biodiesel production
OLIVIERI, GIUSEPPE;GARGANO, IMMACOLATA;ANDREOZZI, ROBERTO;MAROTTA, RAFFAELE;MARZOCCHELLA, ANTONIO;PINTO, GABRIELE;POLLIO, ANTONINO
2013
Abstract
Indoor cultures of Stichococcus bacillaris were carried out to investigate the effect of pH, CO2, and hydrodynamics on biomass and biodiesel productivity in a 0.6L vertical bubble column (VBC) and a 1.7L inclined bubble column (IBC) photobioreactor. The temperature and the irradiance level were set at 23°C and 300micronE/(m2s), respectively. The pH of the liquid culture was in the range 3.0-8.5. The CO2 concentration in the gas phase was increased up to 15%, typical of exhaust gas from power plants. The increased CO2 concentration in the gas phase stimulated the microalgal growth. Tests carried out at different pH and spreading a 5% CO2 gas stream showed that the biomass productivity was maximum at a pH of about 7.0. Acid and alkaline conditions can also be adopted with an approximate 25% decrease in biomass productivity. The comparison between a IBC and a VBC reactor operated under the same conditions pointed out that the performances of IBC were higher than those of VBC: 0.26gbiomass/(Ld) and 0.032gFAME/(Ld) for IBC, and 0.124gbiomass/(Ld) and 0.010gFAME/(Ld) for VBC. IBC was characterized by an intensive liquid circulation that promotes a continuous renewal of microalgal cells in the photic zone. �� 2013 Elsevier B.V.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.