▎ 摘　　要

NOVELTY - The utility model claims a depth degradation device of chemical oxygen demand in medical waste water, the front end of the first level graphene the nano composite grid is connected with the hospital sewage outlet, the lower end of the first level graphene the sterilizing column is connected with the residual solid waste settling tank, the third level graphene the nanometre composite grid and the drain pipe is provided with graphene nanometre composite material filtering device, the multiple purifying tank is further injected with graphene sterilizing agent and graphene chemical oxygen demand scavenging agent, the secondary solid waste sedimentation tank is provided with a microwave generator, the output of the water conveying pipe is qualified to discharge the medical purified water. The utility model can realize deep degradation of chemical oxygen demand in the medical waste water and improve the safety of medical sewage discharge.