Fecha de publicación: 18/07/2023 Fuente: WIPO "circular economy" The utility model discloses an integral septic tank convenient to discharge liquid dung, which comprises a septic tank body, the septic tank body is of a sealed box body structure, a feed port is arranged on the septic tank body, a feed pipe connected with the outside is arranged at the feed port, a discharge port is arranged on one side surface of the septic tank body, and the discharge port is communicated with the septic tank body. And the discharge port is provided with a discharge pipe. Liquid dung accumulated in the septic tank is discharged under the condition of no external force, so that excessive accumulation of the liquid dung is avoided, and the liquid dung is conveniently collected and recycled for resource fertilizer production; due to the three-grid design, the manure liquid in the third pond basically does not contain parasitic ova and pathogenic microorganisms, the harmless requirement of manure is met, and the manure liquid can be directly applied to farmland; by arranging the negative pressure pipe, excrement can enter the septic tank located at a high horizontal position on the ground, so that the septic tank can be placed on the ground surface, the septic tank can be prevented from floating due to the influence of underground water when placed underground, excavation is avoided, and installation is easy and convenient.