Pond culture circulation system based on bio-toilet module

A pond culture circulation system based on a bio-toilet module, comprising:

• a culture pond, and
• an annular treatment channel surrounding the culture pond;
• wherein the annular treatment channel is sequentially provided with a sedimentation zone, a biological purification zone and a water storage zone along a direction of water flow;
• the culture pond comprises a plurality of culture pond units;
• each of the plurality of culture pond units is provided with the bio-toilet module;
• the bio-toilet module communicates with the sedimentation zone through a sewage pipe;
• and the water storage zone communicates with each of the plurality of the culture pond units through a gravity-flow culvert;
• the biological purification zone is sequentially provided with an emergent plant zone, a submerged plant zone and an ecological floating bed zone along a direction in which water flows;
• a bottom of each of the plurality of culture pond units comprises a first zone and a second zone from the bottom up;
• the first zone and the second zone are connected to form a funnel shape with a closed bottom;
• and the first zone is provided with the bio-toilet module and a shape of the bio-toilet module matches with the first zone;
• and
• the bio-toilet module comprises a main body with a hollow truncated cone shape, and a cross section of the main body is tapered from top to bottom;
• a side wall of the main body consists of a plurality of arc plates;
• two adjacent arc plates are detachably connected with each other;
• an upper portion of the main body is provided with a cover plate;
• a side wall of the cover plate is detachably connected to an upper portion of an inner side wall of each of the plurality of arc plates;
• a bottom of the main body is provided with a bottom plate;
• the bottom plate is detachably arranged on the bottom of the main body;
• the cover plate is provided with a sewage pipe mounting port and a plurality of mesh holes;
• a submersible sewage pump is provided in the main body;
• a water outlet of the submersible sewage pump communicates with one end of the sewage pipe;
• and the other end of the sewage pipe penetrates through the cover plate through the sewage pipe mounting port.