Abstract: Circulation and aeration systems for ponds, lakes, sounds, treatment basins, and other bodies of water. In one set of embodiments, water is pumped in a downward direction to circulate ambient oxygen from the atmosphere and produced by plant photosynthesis to deeper strata. In other embodiments, water is circulated within predetermined depth strata. Each system preferably includes a wind turbine, a drive shaft, and an impeller array. Some systems include conduits for conveying and mixing water from and to selected depth strata, or configured as an open impeller-mixing apparatus. Alternative embodiments include systems which incorporate electrical power generation by the wind turbine, solar power generation and use hybrid wind-solar apparatus, and combinations of land-based and in-water based apparatus. A pneumatic pump diffuser and a control flow centered orifice diffuser line are employed in some embodiments.

Abstract: Circulation and aeration systems for ponds, lakes, sounds, treatment basins, and other bodies of water. In one set of embodiments, water is pumped in a downward direction to circulate ambient oxygen from the atmosphere and produced by plant photosynthesis to deeper strata. In other embodiments, water is circulated within predetermined depth strata. Each system preferably includes a wind turbine, a drive shaft, and an impeller array. Some systems include conduits for conveying and mixing water from and to selected depth strata, or configured as an open impeller-mixing apparatus. Alternative embodiments include systems which incorporate electrical power generation by the wind turbine, solar power generation and use hybrid wind-solar apparatus, and combinations of land-based and in-water based apparatus. A pneumatic pump diffuser and a control flow centered orifice diffuser line are employed in some embodiments.

Abstract: A pneumatic bubble aeration reactor and method for conditioning bodies of liquid comprising at least one upwelling bubble conduit, at least one return conduit fluidly connected to the upwelling conduit via a fluid reservoir and a secondary gas-diffuser positioned adjacent the top of the return conduit. A liquid driving diffuser introduces oxygen-rich gas bubbles into the upwelling conduit at a velocity sufficient to cause the downward flowing liquid in the return conduit to exceed the natural tendency of the secondary gas to flow upwardly. This driving action is coupled with a reactor geometry to assure a liquid velocity that exceeds the rise velocity of the bubbles, causing the bubbles to reach the exit end of the return conduit. An expansion chamber is provided at the exit end of the return conduit to present a decreasing velocity gradient to the fluid passing through the return conduit.

Abstract: An apparatus for conditioning stratified water bodies having epilimnion, metalimnion and hypolimnion layers is disclosed comprising a reservoir for containing water so as to define a gas-liquid interface, at least one upwelling conduit adapted for generally vertical disposition within the water body and having an upper discharge end fluidly connected to the reservoir and a plurality of intake ports longitudinally spaced along the conduit so as to afford fluid communication with predetermined depth levels of the epilimnion, metalimnion, and hypolimnion layers of the water body, flow controllers for selectively alternately opening and closing off the intake ports of the upwelling conduit, at least one return conduit adapted for generally vertical disposition within the water body and having an upper inlet end fluidly connected to the reservoir and a plurality of discharge ports longitudinally spaced along the return conduit so as to afford fluid communication with predetermined depth levels of the epilimnion, m

Abstract: A hydrologic discharge control assembly and method is disclosed for automatically withdrawing bottom water from a body of water comprising a housing for forming a reservoir to receive bottom water for automatic gravitational discharge relative to the height of the top surface of the body of water, the reservoir having a discharge overflow edge portion adapted for operational connection to the discharge drain passageway of the body of water and being disposed for overflow discharge of water within the reservoir in excess of a predetermined level, and an inlet connector fluidly connecting the housing to the bottom water portion of the body of water and being dimensioned and configured relative to the housing for conduction of bottom water into the reservoir relative to the height of the top surface of the body of water.