The Parkson DynaCanter™ is a floating style decanter used to remove treated effluent from the upper portion of the basin. The decanter utilizes a flex joint to allow vertical articulation as water levels move between high and low water levels. The decanter collects treated effluent from below the water surface to preclude foam, scum, or other floatables from the effluent. A series of check valves are provided in the decanter draw tube to isolate the effluent piping from the mixed liquor during mixing and aeration steps. A standard open / close valve is used in the effluent piping to control flow rate through the decanter. No electromechanical components are used inside the basin making operation and maintenance convenient for the operator.