The Sequential Batch Reactor (SBR) design of US Filter utilizes advanced equipment and controls to deliver superior performance under most demanding conditions. The SBR design is a fill and draw type with non-steady state activated sludge process where individual reactors are filled one by one in five discrete periods i.e. Anoxic fill, React, Settle, Decant and Idle / Waste sludge. The SBR design provides excellent process control over a wide range of growth by varying the operating strategy in Aerobic or Anoxic conditions. The key to its performance is the Jet Aeration system which are installed at the bottom of the tank. The efficient performance for the Jet Aeration system is achieved through introducing the air into the Aeration system which inturn intermixes with the mother liquor before getting into the wastewater in the aeration tank. In this process the compressed air is sheared into small bubbles creating large interface area for higher mass transfer efficiency between air and wastewater. The entire process control through an auto control system which includes a programmable PLC controller.