To solve their denitrification problem in their anoxic basins, the plant decided to employ (20) 7.5 hp AquaDDM® Mixers instead. The need for tank baffles in the anoxic zones was eliminated due to the AquaDDM®s’ integrated flow vanes and lower input torque. The DDM's pivotal mooring arm also provided ease of maintenance for the plant operators.
A few years later the plant also replaced 30 of their old submerged units in their Primary Effluent Channel with (3) 3 hp AquaDDM® Mixers with directional elbows and (1) AquaDDM® without an elbow. Since replacing the submerged directional mixing units, the plant has saved significant costs on power, labor and maintenance.