Gravity-driven biogas slurry concentration filtration-membrane separation device

The utility model discloses a gravity-driven biogas slurry concentration filtration-membrane separation device, which relates to the technical field of filtration-membrane separation, and comprises three filtration sections, a filtration plate is arranged in each of the three filtration sections, the lower end of the filtration section at the lowest end is communicated and connected with a tail section through a bolt, and the tail section is connected with the bottom end of the filtration section through a bolt. An ultrafiltration membrane is arranged in the tail section, an activated carbon layer is arranged at the position, at the upper end of the ultrafiltration membrane, in the tail section, the upper end of the filtering section at the uppermost end is communicated and connected with a top section through a bolt, and a distributor is arranged in the top section; the input end of the distributor penetrates through the side wall of the top section and is communicated and connected with a feeding pipe, the