Abstract: A system and method reducing pollution in a body of water using biological processes is provided. The system includes a hydraulic dam generated by an induced downwelling of effluent water from a plurality of water circulating devices. A series of linearly arranged treatment sub-systems are disposed upstream of the hydraulic dam. The treatment sub-systems include a water sterilization sub-system for neutralizing harmful and undesirable micro-organisms using an ultrasonic energy generating unit. The ultrasonic energy generated, is of a frequency that disrupts cellular structures in targeted micro-organisms.

Abstract: An apparatus and method for passively generating a current flow in a body of water is disclosed. The passive water circulating apparatus has an aeration plate having a central opening; a plurality of flotation members joined to the aeration plate, the plurality of flotation members being adapted and disposed for maintaining buoyancy of the aeration plate above a water surface; an uplift tube member having a central orifice in fluid communication with the central opening of the aeration plate; a concentrator member disposed at an end of the uplift tube opposite the aeration plate, the concentrator member having a bottom opening in fluid communication with an upper opening, the bottom opening being wider than the upper opening and the upper opening being connected to the uplift tube member; and a plurality of bio-substrates suspended from the concentrator member below the bottom opening, the plurality of bio-substrates providing a substrate for growth of microbes.

Abstract: A process and apparatus for increasing biological activity in waste treatment ponds and lagoons. In this process a floating fluid circulator having an annular space between nested frusto-conical surfaces is operated in a pond or lagoon. An aerator within the scope of the floating fluid circulator is provided. That aerator includes an upper float chassis having a frusto-conical configuration, a sectional diverter arranged in a lower portion of the upper float chassis, the sectional aerator having a lower diverter portion and motor driven means mounted on the upper float chassis connected to a rotatable impeller.