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This chapter discusses the construction and operation of two lab sized sequencing batch reactors for wastewater treatment. The reactors were operated using different aeration strategies during the REACT phase for periods of 3 weeks per strategy. There was a control strategy that included aerating the reactors for the full two hours, a strategy that cut the last half hour of air, a strategy that cut the first half hour of air, and a strategy where their air was on/off/on. During all of these REACT phases there was still mixing even when the air was cut off. The results concluded that the most productive aeration strategy was a cyclical operation, where the REACT period was two hours long but the aeration was only during the first and last 45 minutes of the phase. This strategy had a chemical oxygen demand (COD) removal comparable to that of the control situation and had increased nutrient removal. There was also the added benefit of reduced energy usage due to the aeration periods being shortened.

Optimization of aeration schemes and motor and blower usage for wastewater treatment