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. 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 may 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 wastewater treatment system having a treatment chamber and a clarifier chamber, the treatment chamber having a floor, the clarifier chamber separated from the treatment chamber by a common partition, the clarifier chamber having a top portion and a bottom portion, the clarifier chamber having an opening into the treatment chamber near the bottom of the clarifier, where the common partition is inclined near the area of the clarifier opening, and clarifier chamber being designed so that when wastewater is positioned therein, some solids suspended in the wastewater in the clarifier chamber settle out and exit the clarifier opening, a current in the wastewater in the treatment chamber, where the current passes across the floor of said treatment chamber near the opening of the clarifier, the current being sufficient to substantially prevent a build up of solids on the treatment chamber floor beneath the clarifier opening where the current does not keep all solids within said treatment chamber suspended within th

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 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 main plates each contain a hole. This pair of holes is vertically aligned, and each hole is sized to contain a dropline.

Abstract: An wastewater treatment system is provided. The system includes a cylindrical tank having a sidewall, a bottom, an upper portion and a lower portion. A cone-shaped hopper, open at both ends, is positioned in the tank. The hopper's upper opening is larger than the lower opening.

Abstract: An apparatus and method for treating wastewater is provided including a cylindrical tank having a top, a bottom, an outer wall and a cylindrical inner wall. The inner wall extends from the bottom of the tank to a point above a desired water level. The inner wall, the top and the bottom define an inner aerobic zone. The inner wall, the outer wall, the top and the bottom define an outer anaerobic zone. Wastewater may pass from the outer anaerobic zone to the inner aerobic zone through holes in the inner wall. An open ended conical hopper is positioned within the inner aerobic zone with its smaller end pointed toward the bottom of the tank. Several radially spaced air outlet pipes connected to a compressed air source extend downward into the inner aerobic zone where air is discharged through the open ends of the outlet pipes. An inlet line connected to the tank opens into the outer anaerobic zone of the tank. An outlet line is positioned within the clarification zone to remove purified water from the tank.

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 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 are a pair of mounting plates. These mounting plates are parallel to the bracing plate. In a preferred embodiment, the main plates each contain a hole. This pair of holes are vertically aligned, and each hole is sized to contain a dropline.

Abstract: An apparatus and method for treating wastewater is provided including a cylindrical tank having a top, a bottom, an outer wall and a cylindrical inner wall. The inner wall extends from the bottom of the tank to a point above a desired water level. The inner wall, the top and the bottom define an inner aerobic zone. The inner wall, the outer wall, the top and the bottom define an outer anaerobic zone. Wastewater may pass from the outer anaerobic zone to the inner aerobic zone through holes in the inner wall. An open ended conical hopper is positioned within the inner aerobic zone with its smaller end pointed toward the bottom of the tank. Several radially spaced air outlet pipes connected to a compressed air source extend downward into the inner aerobic zone where air is discharged through the open ends of the outlet pipes. An inlet line connected to the tank opens into the outer anaerobic zone of the tank. An outlet line is positioned within the clarification zone to remove purified water from the tank.

Abstract: A wastewater treatment system: The system entails an aerobic tank and an anaerobic tank. Wastewater enters the aerobic tank where it is aerobically treated. The effluent then flows to the anaerobic tank where it is anaerobically treated to remove nitrogen in the wastewater. A filter may be added to the discharge line from the anaerobic tank to remove any suspended solids emitted with the effluent from the anaerobic tank.

Abstract: An wastewater treatment system is provided. The system includes a cylindrical tank having a sidewall, a bottom, an upper portion and a lower portion. A cone-shaped hopper, open at both ends, is positioned in the tank. The hopper's upper opening is larger than the lower opening.