Fecha de publicación: 28/11/2023 Fuente: WIPO "circular economy" The utility model discloses a buried sewage collecting tank. The buried sewage collecting tank comprises a tank body, an L-shaped pipe, a side strip hole, a spiral piece conveying rod, a motor, a long plate, a strip-shaped insertion hole, a separation insertion plate, a sealing piece, a connecting plate, an electric push rod, a water inlet and a spherical valve. The underground sewage collecting tank is reasonable in structure and has the structural function of separating liquid from sludge, the amount of liquid carried by discharged sludge is reduced, the motion motor drives the spiral piece conveying rod to rotate in the transverse pipe of the L-shaped pipe, the sludge can be discharged to a ground centralized treatment area, the problem that dredging in the underground sewage collecting tank is difficult is solved, and the working efficiency is improved. And the normal usability of the underground sewage collecting tank is ensured.