Your competitors says you don’t need the lower turbine. Is this true?
The lower turbine is recommended anytime you want the flexibility to adjust power to the incoming demand while still maintaining mixing and high oxygen transfer efficiency. This is generally desired to prevent over-oxygenation in nutrient removal plants and to save on energy bills. Operators also like the ability to maintain mixing during basin draining operations (after the water level falls below the surface impeller) to save on basin cleanout. Well over 100 facilities enjoy the benefits of the lower turbine. Our competitors don’t offer the lower turbine, presumably to save cost on their equipment at the expense of operational flexibility.