Patent ID: 8569049

Claim:
A photo bioreactor ( 1 ) comprising a vessel and a construction ( 300 ) comprising a plurality of light distributors ( 30 ), which vessel ( 10 ) comprises a body ( 60 ) comprising cavities ( 61 ) having tapered surfaces ( 62 ) which contain an aqueous liquid ( 20 ) that comprises a photosynthetic culture ( 21 ), wherein the light distributors ( 30 ) have a surface ( 31 ) arranged to receive light ( 40 ) and a tapered surface ( 32 ) arranged to emit at least part of the received light ( 40 ), at least part of the light distributor's tapered surface ( 32 ) being submerged in the liquid ( 20 ) that comprises said culture ( 21 ), wherein the light distributors ( 30 ) and the body ( 60 ) are in a configuration wherein the light distributors ( 30 ) (i) are at least partly arranged in the cavities ( 61 ), (ii) have substantially corresponding shapes, and the cavities are fluidly connected, and wherein, the tapered surfaces ( 62 ) of the cavities ( 61 ) are at a distance d 2 from the tapered surfaces ( 32 ) of the light distributors ( 30 ), enabling a uniform flow of the liquid ( 20 ) between the cavities ( 61 ).