The large-bubble mixing system from Pulsed Hydraulics mixes wastewater for pumping from the headworks, delivering uniform raw wastewater to the first treatment basin. It provides vertical mixing, lifting solids from the bottom of the tank into the plant influent. The system incorporates an air compressor, mixer control system and bubble-forming plate, controlling the pulse of air sent. Controlled by a touch screen, the enclosure controls air pressure, pulse duration and frequency. The stainless steel bubble-forming plate at the tank bottom creates the large bubble mass that drags the liquid to the tank’s surface. There are no moving parts in the tank. 800/641-1726; www.phiwater.com.