Appts. for micro-algae cultivation in fluid-based medium - involves medium being made to move so that objects with solid structure and abrasive surface rest against vessel walls

摘要

The vessel involved is formed to create one or more closed, vertical circulation circuits for the medium with the micro-algae. One or more mouthpieces for gas or liq. are arranged at the bottom of each circuit, and the medium contains objects with a hard structure and abrasive surfaces, and with the same compactness as the medium and algae themselves. Two parallel, vertical, light-permeable tubes form the vessel, the tubes being connected at the top and bottom to form a closed circuit, and one or more light sources are arranged at least between the tubes. The vessel has a base and a light-permeable outer, cylindrical container wall, and a similar inner wall. A cylindrical screen wall is fitted concentrically between the outer and inner walls with its edges located above the base and below the surface of the medium. One or more light sources are arranged at least inside the inner container wall.