Patent ID: 6099722
Filing Date: 2000-08-08
Classification: C02F,Y02W

Abstract:
A self-contained wastewater treatment system, comprising:(a) a vessel having a bottom, side walls and a lid defining a hollow interior for containing wastewater, said vessel being adapted for installation underground;(b) an influent line positioned at a first upper portion of said vessel for transferring a wastewater stream to said vessel;(c) an effluent line positioned at a second upper portion of said vessel generally opposite said influent line for discharging treated wastewater from said vessel;(d) a baffle disposed within said interior, generally between said influent line and said effluent line and extending transversely toward opposing side walls of said vessel, said baffle extending upwardly toward said lid and above an operating water surface elevation within said vessel, wherein said baffle includes a bottom edge separated by a predetermined distance from said bottom of said vessel to define a flow opening, and wherein said baffle defines an upstream aeration chamber and a downstream clarifier chamber within said vessel;(e) said side walls including a downstream end wall, said downstream end wall having a lower inclined wall which intersects said bottom of said vessel adjacent said flow opening;(f) aeration means for producing aeration within said aeration chamber, positioned to produce a generally circular flow path within said aeration chamber, said circular flow path having a flow path component adjacent said flow opening with a flow direction generally away from said clarifier chamber; and(g) solids removal means operatively disposed between said aeration chamber and said clarifier chamber for drawing solids in said wastewater within said clarifier chamber and transferring said solids into said aeration chamber.