Abstract: The invention is a three stage wastewater treatment system having a first tank, a second tank and a third tank, all in fluid communication and forming a unitary structure. The first and second tanks are nested, where the first tank is the innermost tank. The first tank has a clarifier structure disposed therein separating the interior of the first tank into a quiescent zone and an aeration zone. Positioned in the aeration zone is at least one air injector positioned. The treatment system is covered, and is generally buried (but can be used above ground).

Abstract: A reactor chamber for placement in a wastewater treatment system, where the reactor chamber has a chamber formed from a sidewall which forms an interior of the chamber. The sidewall has a top portion and a bottom portion and fixed channel growth media positioned in the interior of the chamber. The fixed channel growth media is positioned below the top of the sidewall, so that when positioned in a treatment system, most of the growth media is located below the water level in the treatment system. The top of the sidewall near the water level (when positioned in a treatment system) is substantially impermeable to wastewater. The reactor includes an air distribution manifold system having a series of air release sites positioned below the fixed channel growth media and adapted to release air which disperses upwardly through the fixed channel growth media. Influent is discharged into the treatment tank near the air discharge sites.

Abstract: The present invention is a method for reducing the nitrate concentration in wastewater within a wastewater treatment apparatus configured to define an aeration zone and a quiescent zone or dilution zone. The method comprises the step of ceasing airflow into the aeration zone for a predetermined time period or until the dissolved oxygen level within the wastewater has reached a predetermined threshold. The method also comprise the step of mixing the wastewater in the aeration zone to prevent suspended particles within the wastewater in the aeration zone from settling and to avoid substantially disturbing the quiescence of the quiescent zone.

Abstract: A clip for supporting the clarifier and the droplines in a wastewater treatment system is disclosed. The clip comprises a pair of parallel main plates wherein at least one main plate contains a groove. The main plates are separated by a bracing plate. The bracing plate is perpendicular to the main plates and is attached to the ends of each. Attached to the free ends of each of the main plates is a pair of mounting plates. These mounting plates are parallel to the bracing plate. In a preferred embodiment, the grooves are “V” shaped and each contains a hole. This pair of holes are vertically aligned, and each hole is sized to contain a dropline.