Abstract: A floating aerator that is highly efficient in oxygenating water and wastewater utilizes high-volume, low pressure air that is diffused into a sub-surface oxygen transfer chamber in which water and wastewater is oxygenated. An air lift is created in the oxygen transfer chamber through the discharge of air bubbles in the water column in the aerator. The aerator comprises a floating head having a concave lower surface, a main chamber or barrel that defines the oxygen transfer chamber, and an air diffuser that extends coaxially through the float head and barrel interconnects the float head to the barrel such that there is a discharge slot defined between the lower surface of the float head and the barrel. A ballast ring floats the aerator at the desire level such that a flow of air bubbles and oxygenated water or wastewater are discharged at a subsurface level.

Abstract: The present invention includes methods for introducing a dry material into a fluid stream in a way that ensures a predictable, highly accurate and consistent application of the material. The invention applies variable amounts of dry material regardless of whether the fluid stream flow rate is fixed or variable. The dry material is handled in dry bulk form and may be highly soluble or nearly insoluble. The dry bulk material is metered before being mixed into a slurry and injected to the fluid stream in a manner that continuously and automatically adjusts the application rate to compensate for varying fluid flow rates or chemical composition, in order to provide a precise fluid treatment level at all times. The present invention allows for the storage of large quantities of the dry process amendment as an integrated and dust-free function of the process.

Abstract: The present invention is an apparatus for introducing a dry material into a fluid stream in a way that ensures a predictable, highly accurate and consistent application of the material. The invention applies variable amounts of dry material regardless of whether the fluid stream flow rate is fixed or variable. The dry material is handled in dry bulk form and may be highly soluble or nearly insoluble. The dry bulk material is metered before being mixed into a slurry and injected to the fluid stream in a manner that continuously and automatically adjusts the application rate to compensate for varying fluid flow rates or chemical composition, in order to provide a precise fluid treatment level at all times. The present invention is capable of storing large quantities of the dry process amendment as an integrated and dust-free function of the apparatus.