The OxyStream™ Oxidation Ditch from WesTech Engineering has proven to be the ideal equipment for biological wastewater treatment applications throughout the world. It combines vertically mounted, low-speed surface aerators with an oxidation ditch design to maximize oxygen transfer efficiency while maintaining the greatest flexibility for power turndown. In addition, the OxyStream™ has greater side water depths and fewer required aerators than a conventional brush rotor or disc rotor oxidation ditch. The vertical slow-speed surface aerator eliminates maintenance-prone horizontal shafts, pillow block bearings, and drive units near the water surface. Above all, the OxyStream™ Oxidation Ditch provides energy savings and produces predictable, high-quality effluent.