Sewage and wastewater treatment device based on public health concept

The invention belongs to the technical field of sewage and wastewater treatment, and discloses a public health idea-based sewage and wastewater treatment device which comprises a shell I. A round block is fixedly mounted in the shell I. A straight channel is formed in the round block, and a top cover is fixedly mounted at the top of the round block. A vertical rod located in the straight channel is fixedly installed between the round block and the top cover, the outer surface of the vertical rod is movably sleeved with a net supporting plate, an inner groove is formed in the top cover, a floating block is movably installed in the inner groove, and the floating block is connected with the net supporting plate through a thin line. Compared with a traditional device, the device utilizes bubble attachment to change the buoyancy of the net supporting plate, so that the buoyancy balance between the net supporting plate dosing ball and the floating block is broken, the longitudinal up-and-down movement of the medici