Abstract: A wastewater treatment system includes an outer tank, an aeration chamber partition located within the outer tank and forming an aeration chamber, and a draft tube located within the outer tank and vertically extending into the bottom of the aeration chamber to communicate the aeration chamber with an outer chamber formed. A submerged aerator is located within the draft tube. An inlet communicates influent into the aeration chamber and an outlet communicates effluent out of the outer tank. A scum baffle prevents floating solids from entering the outlet. The outer tank has an effluent weir which supports the scum baffle and the scum baffle has an upward facing flange that supports the aeration chamber partition. An air intake pipe extending to the aerator through an upper end of the draft tube has support members engaging a top of the draft tube to support the aerator within the draft tube.

Abstract: A wastewater treatment system integrates three tanks that oxidize organic compounds, retain solids, reduce nutrients, an inactivate pathogens, discharging an effluent that protects public health and the environment. The system homogenizes wastewater and controls its frequency, interval, volume, and rate of dosing into a treatment tank designed to develop, facilitate, optimize, and maintain dense microbial colonies both suspended in liquid and attached to engineered filter media. These colonies and filter media complete the oxidation, retention, reduction, and inactivation.