NOVELTY - The device comprises a rectangle reaction tank, a sewage inlet pipe (1), a discharge pipe (8), a revolving water decanter (5), and a drainage canal (6). The rectangle reaction tank is provided with a clapboard (10) and divided into a water inlet area and a reaction area by the clapboard. A water outlet of the sewage inlet pipe is located at a bottom of the water inlet area. The water inlet area and the reaction area are provided with multiple frame screens roughly paralleled with each other respectively. The clapboard is vertical to the frame screens.    USE - The device is useful for aerobic granular sludge treatment.    ADVANTAGE - The device is capable of aerobically, rapidly and economically treating the granular sludge with high purity and efficiency and reduced energy consumption.    DETAILED DESCRIPTION - The device comprises a rectangle reaction tank, a sewage inlet pipe (1), a discharge pipe (8), a revolving water decanter (5), and a drainage canal (6). The rectangle reaction tank is provided with a clapboard (10) and divided into a water inlet area and a reaction area by the clapboard. A water outlet of the sewage inlet pipe is located at a bottom of the water inlet area. The water inlet area and the reaction area are provided with multiple frame screens roughly paralleled with each other respectively. The clapboard is vertical to the frame screens. Multiples inlet openings are provided on the clapboard. The bottom of the water inlet area and a bottom of the reaction area are provided with an aerator. The discharge pipe is located at the bottom of the water inlet area. An end of the reaction area is provided with the revolving water decanter. A water inlet end of the revolving water decanter is located at an upper part of the end of the reaction area. The water outlet end of the revolving water decanter is located at the drainage canal. The water inlet area is provided with the frame screens. An upper part of a sludge deposition area of the reaction area is provided with the frame screens. The frame screens are 0.2x 0.2 m square mesh weaved with polypropylene fiber. A vertical interval between the frame screens is 0.5 m. The upper part of the end of the reaction area is provided with a water outlet pipe. The water outlet pipe is provided with multiple through holes. A water outlet end of the water outlet pipe is connected to the revolving water decanter. The revolving water decanter is provided with a vent valve. An INDEPENDENT CLAIM is included for a method for aerobic treatment of granular sludge.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of a device for aerobic granular sludge treatment.    Sewage inlet pipe (1)    Water decanter (5)    Drainage canal (6)    Discharge pipe (8)    Clapboard. (10)