Energy Saving of Nutrients Removal in Advanced Wastewater Treatment Systems

Abstract

Energy consumption in mixing and aeration process was examined for the energy saving of nitrogen and phosphorous removal system. Adoption of the intermittent aeration mixing system was estimated to reduce the energy consumption in anaerobic and anoxic tank by 9%. Adding immobilization media in the aeration tank gave higher overall volumetric oxygen transfer coefficient when nitrification proceeded. Performance of the aeration apparatus was the critical factor for energy saving in aerobic tank.