Abstract: A self-contained wastewater treatment system is provided, comprising a vessel having a bottom, side walls and a lid defining a hollow interior for containing wastewater, the vessel being adapted for installation underground; an influent line; an effluent line; and a baffle disposed within the interior, generally between the influent line and the effluent line and extending transversely toward opposing side walls of the vessel. The baffle includes a bottom edge separated by a predetermined distance from the bottom of the vessel to define a flow opening. The position of the baffle defines an upstream aeration chamber and a downstream clarifier chamber within the vessel. The side walls include a downstream end wall, the downstream end wall having a lower inclined wall which intersects the bottom of the vessel adjacent the flow opening.

Abstract: A self-contained wastewater treatment system is provided, comprising a vessel having a bottom, side walls and a lid defining a hollow interior for containing wastewater, the vessel being adapted for installation underground; an influent line; an effluent line; and a baffle disposed within the interior, generally between the influent line and the effluent line and extending transversely toward opposing side walls of the vessel. The baffle includes a bottom edge separated by a predetermined distance from the bottom of the vessel to define a flow opening. The position of the baffle defines an upstream aeration chamber and a downstream clarifier chamber within the vessel. The side walls include a downstream end wall, the downstream end wall having a lower inclined wall which intersects the bottom of the vessel adjacent the flow opening.

Abstract: An apparatus for the treatment of wastewater from relatively small structures such as single family residences, dwellings and the like includes first and second vessels connected by a flow line, the first vessel including a wastewater inlet and the second vessel including an outlet for the discharge of clarified water. A transverse baffle divides the second vessel into aeration and clarifier sections, the clarifier section including a transversely mounted inclined plate which prevents the accumulation of solid material in the clarified section and redirects the solid material back into the aeration section. A multiple angle discharge piping arrangement prevents clarified liquid from discharging the apparatus until it has made at least two right angle turns before reaching the discharge piping of the unit.

Abstract: An apparatus for the treatment of waste water from relatively small structures such as single family residences, dwellings and the like includes first and second vessels connected by a flow line, the first vessel including a waste water inlet and the second vessel including an outlet for the discharge of clarified water. A transverse baffle divides the second vessel into aeration and clarifier sections, the clarifier section including a transversely mounted inclined plate which prevents the accumulation of solid material in the clarified section and redirects the solid material back into the aeration section. A multiple angle discharge piping arrangement prevents clarified liquid from discharging the apparatus until it has made at least two right angle turns before reaching the discharge piping of the unit.