WASTEWATER TREATMENT SYSTEM WITH DE-NITRIFICATION

摘要

An aerobic wastewater treatment system includes an outer tank, a deck located within the outer tank and forming an aeration chamber therebelow and an effluent chamber, and a plurality of porous bags hanging from the deck into the aeration chamber. The deck has openings communicating interiors of the bags with the effluent chamber. A submersible aerator is located within the aeration chamber. An inlet communicates an exterior of the outer tank with the aeration chamber so that influent can enter into the aeration chamber. An outlet communicates the effluent chamber with the exterior of the outer tank so that effluent can exit out of the outer tank. A controller is adapted to operate the submersible aerator in a timed on- off sequence so that dissolved oxygen can be controlled to create times of anoxic conditions.