The RollsAIR and RollsAIR HS-STP are designed to treat large commercial and small municipal wastewater applications. Utilizing the MyTEE Screen to deflect solids/settle grit in the headworks zone, the easy maintenance of the entire system alleviates the need for manual raking and cleaning the non-clogging LIXOR aerators. The Plug Flow aeration action “rolls” from the side to the center to the submerged effluent clarifier.