Anaerobic digestion device for organic solid waste based on uncoupling of hydraulic retention time (HRT) from sludge retention time (SRT)

An anaerobic digestion device for organic solid waste based on uncoupling of hydraulic retention time (HRT) from sludge retention time (SRT), comprising:

• a self-sustaining air flotation screening tank;
• wherein the self-sustaining air flotation screening tank is provided with a sludge discharge pipe and a return pipe;
• the sludge discharge pipe is connected with a first separating mechanism;
• a bottom of the first separating mechanism is connected with a second separating mechanism;
• the first separating mechanism and the second separating mechanism are both connected with the return pipe;
• the first separating mechanism comprises a shell, a first separating part and a second separating part;
• the first separating part and the second separating part are located in the shell, and are rotationally connected with the shell;
• the first separating part is located above the second separating part;
• and the first separating part is communicated with the second separating part;
• the second separating mechanism comprises a separating cylinder;
• a bottom of the separating cylinder is connected with a liquid collecting tank;
• a side of a top of the separating cylinder is provided with a first discharge port and a second discharge port;
• and
• the first separating part comprises a rotating cylinder;
• an outer wall of the rotating cylinder is circumferentially fixedly connected with a plurality of stirring rods;
• a body of the rotating cylinder is provided with a plurality of through holes;
• the plurality of through holes and the plurality of stirring rods are in staggered arrangement;
• a top of the rotating cylinder is closed, and a wall at a bottom of the rotating cylinder is fixedly connected with a sprocket;
• the sprocket is in transmission connection with a first motor through a chain;
• and the first motor is fixedly connected with an outer side of the shell.