Abstract: An exhaust gases and particulate capture system comprises an aspirator unit and a secondary stack mounted in fluid cooperation with a large water tank. Exhaust gases, along with entrapped particulates from the combustion process, are removed from a smokestack and are introduced into the aspirator unit and mixed with water from the tank. The gases and particulates are blended with the water in the mixing chamber of the aspirator which churns the gases, particulates and water into a very turbulent condition. The resulting mixture is discharged from the aspirator through an entrainment nozzle into the water tank. The design of the exit end of the entrainment nozzle effects a sweeping motion to the mixture being discharged ensuring that the mixture is discharged over the entire width of the tank holding the water. The exhaust gases and entrapped particulates are cooled and condensed in the water tank and the particulates settle down to the bottom of the tank.

Abstract: A fish culture system for cultivating fish contained in tank-like silos through which aerated water that may also contain food and/or medicine is circulated in such a way that the water circulates upwardly through the silos. Individual silos containing diseased fish may be isolated for treatment of the fish independently of the remaining fish population. Sediment collecting in the bottoms of the silos may be drained and dried for use as fertilizer.

Abstract: A device for aerating lakes, the main part of which is an elongate casing having a longitudinal water passage through it. Between the inlet and outlet of this passage there is a frusto-conical segment converging to a restricted outlet opening and a cylindrical barrel segment spaced downstream of, and in axial alignment with, the frusto-conical segment. Surrounding and including the axial space between the frusto-conical and cylindrical segments is a mixing chamber having a pair of air intake openings to which air hoses are attached. A straight tubular nozzle is attached to the casing at its outlet end, which nozzle has a unique beveled configuration at its discharge end and a pair of apertures through its wall. The device is positioned underwater for use with the air hoses from the mixing chamber in communication with the atmosphere. A submersible pump forces water into the casing which emerges as a jet stream from the restricted opening in its frusto-conical segment.

Abstract: A device for simultaneously aerating and chemically treating lakes to prevent or retard the process of eutrophication in the lake waters. The device has a venturi outlet passage for the discharge of a pressurized stream of water and a venturi inlet chamber spaced upstream of the outlet passage, as well as a mixing chamber in which air and treating chemicals can be turbulently ingested into the stream. The device is positioned underwater for use with an open line extending from the mixing chamber to a point above the water surface. A nozzle is attached to the venturi outlet passage. This nozzle has a pair of side openings to draw water into the stream passing through the outlet passage to give the stream greater density and turbulence as it leaves the nozzle. Also, the venturi outlet passage has three communicating chambers with walls shaped to create turbulence in the stream even before it reaches the nozzle.