DEVICE FOR BIOLOGICAL WASTE WATER TREATMENT

摘要

1. Device for biological waste water treatment, comprising a closed reactor vessel presenting in spaced vertical and concentric relation to each other an outer shell and an inner flow conduit pipe, and presenting an overflow determining the liquid level and the upper gas collecting space at the outer shell to the inner flow conduit pipe terminating above the reactor body bottom and below the liquid level, waste water and an oxygen-containing gas over a nozzle being added, characterized by that from the closed reactor vessel, bacteria containing waste water is removed and is led back by means of a pump (7) into the upper area of the flow conduit pipe (2) from above over a jet nozzle (6), through the nozzle outlet section (13) of which a slip-in pipe (12) being arranged centrally and in spaced relationship, said pipe (6) extending into the underpressure area of the jet nozzle (6) and being in connection with an area containing oxygen-containing gas.