Happened to read this paper “Biotransformations of carbon dioxide in photobioreactors”(http://www.mendeley.com/research/biotransformations-carbon-dioxide-photobioreactors/#), it’s abstract says: Despite large amounts of CO2 that were sequestered during the cultivation, it is demonstrated that only a small fraction (about 3%) was effectively fixed as microalgae biomass, indicating the existence of other routes of CO2 conversion in the photobioreactor.
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This article is more promissing :)
http://eprints.cmfri.org.in/2212/1/Kaladharan_107-110.pdf
@Inna Thanks indeed! :)
We have developed a carbonation column system for efficient CO2 mass transfer into algae biomass. Our studies showed that upto 76% of the bubbled CO2 can be transferred into algae biomass using this system. you may have a look at the related articleAn efficient system for carbonation of high-rate algae pond water to enhance CO2 mass transfer. | Mendeley - (2011) Putt et al. Bioresource Technology. Read by researchers in: 25% Environmental Sciences, 25% Engineering. High-rate algal ponds have the potential to produce 59 T of dry biomass ha(-1)year(-1) based on the specific productivity of 20 g m(-2) day(-1). Atmospheric air provides only 5% of the CO(2) to the... - http://www.mendeley.com/research/efficient-system-carbonation-highrate-algae-pond-water-enhance-co2-mass-transfer/
Effectively, natural diffusion of CO2(g) into water is around of 3% and this is a normal concentration in open pound bioreactors due to they are open systems. But in PBR closed systems you can hiper saturated the liquid culture medium, when microalgae are in exponential grown, so that you can rise disolved CO2(g) concentrations as high as 15%, there is 5 times normal concentration. However you must to be account that these high disolved CO2(g) concentrations only can be supported by continuous culture systems.