Abstract: A smoke stack, which discharges contaminated gases, is provided with a plenum chamber, at its end, formed of one or more stacked modules. Each module includes a hollow cylindrical housing, from which protrudes, in various radial directions, a plurality of ducts, each being provided with a nozzle at its end. The nozzle has a central passageway through which a portion of the gases pass and is discharged into the atmosphere, and a second passageway which directs the air around the discharging gases for imparting a swirling action to the commingled gases. An ultra low volume of treatment fluid, usually a liquid chemical, is progressively discharged into the central passageway so that fog is generated as the gases and liquid emerge. Relief valves for the gas discharge into this fog. An accumulator tank at the top of a chamber or a metering pump supplies the liquid.

Abstract: A smoke stack, which discharges contaminated gases, is provided with a plenum chamber, at its end, formed of one or more stacked modules. Each module includes a hollow cylindrical housing, from which protrudes, in various radial directions, a plurality of ducts, each being provided with a nozzle at its end. The nozzle has a central passageway through which a portion of the gases pass and is discharged into the atmosphere, and a second passageway which directs the air around the discharging gases for imparting a swirling action to the commingled gases. An ultra low volume of treatment fluid, usually a liquid chemical, is progressively discharged into the central passageway so that fog is generated as the gases and liquid emerge. Relief valves for the gas discharge into this fog. An accumulator tank at the top of a chamber or a metering pump supplies the liquid.

Abstract: An improved bacterial culturing system which is advantageously used "on-site" at waste water treatment plants. The system rapidly and efficiently produces various types of bacteria having enhanced activity and controllable characteristics. The bacteria are used to break down undesired or unwanted chemical species contained in the waste water stream. The system includes a unique culturing or primary basin in communication with an acclimation or acclimator basin. Bacteria grown in the culturing basin are partially exposed to the materials they are later intended to break down in the acclimation basin.