| 摘要 |
A multi-staged bio-photoreactor is provided to reduce the costs for manufacturing and operation of the bio-photoreactor by improving carbon dioxide-fixing efficiency through maximizing contact efficiency of algae flow and gas which are injected in reverse directions each other, so that the efficiency lowering due to scale-up is improved. A multi-staged bio-photoreactor comprises: at least one light reaction tank(100) which induces photoreaction of a medium containing carbon dioxide and algae by exposing it to light, and has a carbon dioxide gas inlet(10) in the bottom, a gas outlet(11) on the top, a medium inlet(20) in the upper part and a medium outlet(30) in the lower part; at least one dark reaction tank(300) which induces respiration of the medium containing carbon dioxide and algae by inhibiting exposure to light, and has a gas outlet(13) on the top, a medium inlet(60) in the upper part and a medium outlet(70) in the lower part; and a circulation tube(80) for transporting the medium, wherein excessive algae is removed from the medium outlet of dark reaction tank into the medium inlet of light reaction tank.
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