Application of Air Distribution and Control System Based on Energy- saving in Shaoxing Sewage Treatment Plant

Most aeration systems in wastewater treatment plants using activated sewage treatment techniques have problems such as fluctuation of dissolved oxygen concentration,aeration rate redundancy and high energy consumption in aeration unit. Operation data of VACOMASS air distribution and control systems used in 1#aeration tank of the Shaoxing Sewage Treatment Plant's third project were analyzed. The results showed that the dissolved oxygen concentration could be stably controlled within the setting range( ± 0. 5 mg / L). The air saving rate was 25% to 50% while simultaneously ensuring stable dissolved oxygen concentrations in the aeration tank and stable operation of biochemical unit,thereby reducing energy consumption and operation costs of the aeration unit.