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High-density algal photobioreactors using light-emitting diodes
Choul-Gyun Lee, Bernhard Ø. Palsson *
Department of Chemical Engineering, University of Michigan, Ann Arbor, Michigan 48109
*Correspondence to Bernhard Ø. Palsson, Department of Chemical Engineering, University of Michigan, Ann Arbor, Michigan 48109
Keywords - Chlorella vulgaris • light-emitting diodes (LEd) • Oxygen production • photobioreactor(PBR)
Abstract
Lack of high-density algal photobioreactors (PBR) has been a limitation in exploiting the biotechnological potential of algae. Recent developments of highly efficient light-emitting diodes (LED using gallium aluminum arsenide chips) have made the development of a small LED-based PBR possible. We have calculated theoretical values of gas mass transfer requirements and light-intensity requirement to support high-density algal cultures for the 680 nm monochromatic red light from LED as a light source. A prototype PBR has been designed based on these calculations. A cell concentration of more than 2 × 109 cells/mL (more than 6.6% v%sol;v), cell doubling times as low as 12 h, and an oxygen production rate as high as 10 mmol oxygen/L culture/h were achieved using on-line ultrafiltration to periodically provide fresh medium.
Original Wiley Interscience link here
Nature gave us oil from algae; perhaps we should try Nature's way again
Oilgae - Oil & Biodiesel from Algae
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algOS - Biodiesel from Algae Open Source
About Oilgae - Oilgae - Oil & Biodiesel from Algae has a focus on biodiesel production from algae while also discussing alternative energy in general. Algae present an exciting possibility as a feedstock for biodiesel, and when you realise that oil was originally formed from algae - among other related plants - you think "Hey! Why not oil again from algae!"
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is it possible to create a big led photobioreactor, big , like 45' by 4' by 8' high? the size of a sea freight container!
ReplyDeletethanks
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