Photobioreactor, suitable for microalgae cultivation

Abstract

The present invention relates to a photobioreactor (10) comprising a culture tank (20) adapted to receive a microalgae culture. The culture tank (20) is equipped with submerged stirring means (40), including a rotor (41). This rotor (41) comprises a hub (411) intended to be connected to an air supply (50) and extended by at least one tubular radial arm (412) on which bubble orifices (4121) are distributed for the release of said air flow. At least a portion of the length of said at least one tubular radial arm (412) conforms to said bottom wall (21) such that a first dimension in distance (L1) between at least one of said bubble orifices (4121) and said bottom wall (21) is equal to or less than 50 mm, preferably from 5 mm to 20 mm. Figure for the abstract: 1

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