[Problem] to provide a photobioreactor unit that allows equipment required for culturing a photosynthetic organism such as microalgae to be made compact and movable in a tubular closed photobioreactor. [Solution] provided is a photobioreactor unit 1 that is mounted on two flat trucks and is movable. A first flat truck a is mounted with a reactor 2 composed of a glass tube 21 for growing algae by photosynthesis of a culture solution containing the algae and an LED light emitting device 40 for oppositely performing light irradiation, A circulation tank 3 for storing and circulating the culture solution containing algae in the reactor, a heat exchanger 5 for adjusting the temperature of the culture solution to a solution suitable for photosynthesis, a degassing tank for degassing the oversaturated oxygen from the culture solution discharged from the reactor, and a degassing tank for returning the degassed culture solution to the circulation...

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