method and device for the biological treatment of abwaessern

摘要

Method and apparatus for substantially upgrading the operating efficiency of wastewater treatment plants is disclosed. The invention utilizes forcibly rotating bodies that are partially submerged in the wastewater to provide surface area on which biological slimes develop and remove pollutants from the wastewater. The rotating, partially submerged bodies are located in the upper portion of the treatment tanks, to provide a biological treatment zone. A subjacent settling zone, physically separated from the biological treatment zone by a "false bottom" or longitudinal baffle is provided in the lower portion of the treatment tank. Wastewater introduced in the tank is first biologically treated and then circulated through the subjacent settling zone to remove settleable solids.