The present invention is achieved by providing a chain sprocket of a chain-flighted sludge collector installed in a sedimentation basin of a sewage terminal treatment plant such as industrial or domestic wastewater, and this sprocket is used for the number of raw water on both sides of the sedimentation basin for water treatment. Main shafts and several driven shafts installed across the front and rear of the sedimentation basin in order to drive a pair of chain flights arranged in parallel to move to the surface and the bottom to collect sludge and bubbles in a predetermined trajectory. A sprocket having a boss and an arm made up of a divided element bisected into the respective partitions, and a sprocket having teeth at the outer circumference of the arm. Is divided into inner and outer in the circumferential direction and divided into the outer part and the inner part It can be installed in a compatible and compatible structure within the structure and separated into divided media parts that can be used to replace the media according to the axis presented in various standards. A sprocket of a chain flighted sludge collector suitable for sedimentation basin for sewage treatment which can be applied to all axes.
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