TY - JOUR
T1 - Synchronization of fluid-dynamics related and physiological time scales and algal biomass production in thin flat-plate bioreactors
AU - Gebremariam, Alemayehu Kasahun
AU - Zarmi, Yair
PY - 2012/2/1
Y1 - 2012/2/1
N2 - Experiments on ultrahigh density unicellular algae cultures in thin flat-plate bioreactors (thickness 2 cm) indicate that: i) Optimal areal biomass production rates are significantly higher than in traditional ponds or raceways, ii) productivity grows for radiation levels substantially higher than one sun; saturation emerging, possibly, at intensities of about four suns, and iii) optimal volumetric and areal production rates as well as culture densities increase as reactor thickness is reduced. The observations are reproduced within the framework of a simple model, which takes into account the random motion of cells across the reactor thickness, and the competing effects of two physiologically significant time scales. These are T R, the time that elapses from the moment a reaction center has collected the number of photons required for one photosynthetic cycle until it is available again for exploiting impinging photons (1-10 ms), and T W, an average of the decay time characteristic of photon loss processes (several ms to several tens of ms).
AB - Experiments on ultrahigh density unicellular algae cultures in thin flat-plate bioreactors (thickness 2 cm) indicate that: i) Optimal areal biomass production rates are significantly higher than in traditional ponds or raceways, ii) productivity grows for radiation levels substantially higher than one sun; saturation emerging, possibly, at intensities of about four suns, and iii) optimal volumetric and areal production rates as well as culture densities increase as reactor thickness is reduced. The observations are reproduced within the framework of a simple model, which takes into account the random motion of cells across the reactor thickness, and the competing effects of two physiologically significant time scales. These are T R, the time that elapses from the moment a reaction center has collected the number of photons required for one photosynthetic cycle until it is available again for exploiting impinging photons (1-10 ms), and T W, an average of the decay time characteristic of photon loss processes (several ms to several tens of ms).
UR - http://www.scopus.com/inward/record.url?scp=84857411092&partnerID=8YFLogxK
U2 - 10.1063/1.3678009
DO - 10.1063/1.3678009
M3 - Article
AN - SCOPUS:84857411092
SN - 0021-8979
VL - 111
JO - Journal of Applied Physics
JF - Journal of Applied Physics
IS - 3
M1 - 034904
ER -