Apparatus for the secondary clarification of municipal or industrial waste waters by mixed algal cultures

摘要

Apparatus for the secondary clarification of municipal or industrial waste waters (effluents) by a mixed algal culture, characterised by a flat, circular tank having an outer wall and a central depression, a feed opening out remotely from the depression, an outlet, the opening of which is in the region of the depression, and a device for conducting away algal settling in the depression.