Abstract: A computer-implemented system for designing a pressure-dosed drain field comprising: a screen that allows a user to specify length and diameter for pipes that comprise the forcemain and discharge assembly, specify the pumping liquid level and discharge elevation, select the number of laterals and enter a specified residual pressure, enter or select a coefficient to be used in calculating friction losses, and enter the diameter and length of each manifold segment; a minor loss screen that calculates minor losses based on fitting selections made by the user; a pump file; a tabulated results screen; a gauge screen; and system and pump curves. A computer-implemented method of using the above system to design a pressure-dosed drain field. The purpose of the system and method is to enable an engineer to design a pressure-dosed drain field that will meet regulatory requirements for the system flow differential.

Abstract: A computer-implemented system for designing a pressure-dosed drain field comprising: a screen that allows a user to specify length and diameter for pipes that comprise the forcemain and discharge assembly, specify the pumping liquid level and discharge elevation, select the number of laterals and enter a specified residual pressure, enter or select a coefficient to be used in calculating friction losses, and enter the diameter and length of each manifold segment; a minor loss screen that calculates minor losses based on fitting selections made by the user; a pump file; a tabulated results screen; a gauge screen; and system and pump curves. A computer-implemented method of using the above system to design a pressure-dosed drain field. The purpose of the system and method is to enable an engineer to design a pressure-dosed drain field that will meet regulatory requirements for the system flow differential.

Abstract: A light weight medium for growing microorganisms includes a mass of polymeric foam, such as a polyurethane foam, having an outer region enclosing an inner region. A plurality of fragments of an inorganic material, such as sand, are at least partially embedded in the outer region. The light weight medium may be used to support growth of microorganisms in a wide variety of biological and/or biochemical processes, or may be used without microorganisms in chemically treating wastes.

Abstract: A light weight medium for growing microorganisms includes a mass of polymeric foam, such as a polyurethane foam, having an outer region enclosing an inner region. A plurality of fragments of an inorganic material, such as sand, are at least partially embedded in the outer region. The light weight medium may be used to support growth of microorganisms in a wide variety of biological and/or biochemical processes, or may be used without microorganisms in chemically treating wastes.

Abstract: An apparatus and method for modifying waste water to reduce nitrate content and biochemical oxygen demand is provided. The apparatus includes an ammonification and denitrification region having a substantially anaerobic environment, a nitrification region having a substantially aerobic environment, and an effluent drainage region. Effluent circulates through the ammonification and denitrification region and the nitrification region to convert organic nitrogen-containing compounds in waste water to nitrogen gas and carbon dioxide.

Abstract: An apparatus and method for modifying waste water to reduce nitrate content and biochemical oxygen demand is provided. The apparatus includes an ammonification and denitrification region having a substantially anaerobic environment, a nitrification region having a substantially aerobic environment, and an effluent drainage region. Effluent circulates through the ammonification and denitrification region and the nitrification region to convert organic nitrogen-containing compounds in waste water to nitrogen gas and carbon dioxide.