Sewage collection tank for water treatment

The utility model discloses a sewage collection tank for water treatment, which comprises a tank body, a filter frame, a connecting block and a cover plate, a limiting block is welded at one end of the inner surface of the tank body, the filter frame is clamped in the tank body through the limiting block, a filter screen is arranged in the filter frame, a liquid outlet is formed in one side of thetank body, and the liquid outlet is communicated with the interior of the tank body. A supporting leg is welded to the bottom end of the outer surface of the tank body, a pipe thread is formed in oneend of the inner surface of the supporting leg, a bottom plate is connected to the bottom of the tank body, a connecting block is arranged on the upper surface of the bottom plate, a pipe thread is formed in the surface of the outer side of the connecting block, and the bottom plate is in threaded connection with the supporting leg through the pipe thread outside the connecting block. The sewagetreatment device has the ad