Abstract: An apparatus (200) for the treatment of effluent including a chamber (210) having an inlet (212) and an outlet (252), a plurality of plate-type electrodes (211) extending vertically in the chamber (210), and an electrical supply connected to the plurality of plate-type electrodes (211). The plurality of plate-type electrodes (211) define a plurality of channels extending within the chamber (210). Each of the plurality of channels occurs between adjacent electrodes (211). The plurality of electrodes (211) are positioned between the inlet (212) and the outlet (252). The electrical supply delivers electricity of a first polarity to a first set of a plurality of electrodes (211). The electrical supply delivers electricity of an opposite polarity to the second set of electrodes (211).

Abstract: The invention is a method for entraining gas in a liquid solution and an apparatus for practicing the method. In the method of the invention, gas is introduced into a liquid solution being pumped through a conduit at the point of lowest absolute pressure in the system upstream of the pumping means. The gas is introduced into the liquid as bubbles or gas pockets with as small a diameter as is mechanically possible at the narrowest point of a venturi in the conduit and the increasing liquid pressure in the system downstream of the venturi is utilized to compress the bubbles still further. The bubbles or pockets of gas are prevented from coalescing as they pass through the pumping means and exit the apparatus by the pumping means itself. The apparatus comprises a conduit having a passageway therethrough in which a venturi is formed. An annular chamber is provided in the body of the conduit at the narrowest point of the venturi where the gas is introduced into the liquid.

Abstract: A wastewater treatment system and method is disclosed, including a circular aeration basin and a contiguous annular clarifier channel. Rotational flow of an aerated mixture of untreated wastewater and return sludge is induced in the aeration basin at its periphery with relatively less turbulent flow at the center.A clarifier inlet is fluidly connected to the aeration basin through openings provided in the aeration basin wall, the clarifier inlet including means to dissipate turbulence.A sludge removal manifold extends within the clarifier having valve-controlled suction arms. The spaced suction arms provide for precise control of sludge blanket depth and sludge age independent of rate of sludge return to the basin.Process sludge withdrawn from the clarifier is mixed with raw wastewater and returned to the aeration basin.The relatively less-turbulent flow in the central area of the basin allows process sludge to accumulate in said central area.

Abstract: The invention is a kinetic pump having a centerless impeller. The pump comprises a pump body rotated by a powered means either having a rotatable shaft or driving a peripheral belt drive. The pump body has a recess formed therein as well as at least one slot that fluidly connects the recess with the environment in which the pump operates. A means for imparting kinetic energy is formed in the wall of the recess to pump the fluid through the recess and the slots.