| The hospitals and the medical treatment organizations produce medical wastewater in their usual work. If the wastewater is not treated properly it will damage to human health and environment. One hospital's underground wastewater treatment plant could not work well since it had been built. The hospital commission us to analysis the problem of the treatment plant.1 The hospital's wastewater plant have no data about quantity, quality and record of operation. We measured the water quantity and water quality in practice, and know the QMAX is 825m3/d in the near future and 900m3/d in the far future , and water quality (COD, SS, pH, NH4+-N ).2 We consulted some references and measured the structures. We make clear the underground wastewater treatment plant's submerged biofilm reactor process and the constitution of the main equipment.3 The submerged biofilm process can be used to treat the hospital wastewater in the technology. The key problem of the hospital wastewater treatment plant is "the underground" style. We analysis the problem of every structure of propose the reconstruction that the submerged biofilm tank, the precipitation tank, the water pipe and the air pipe.4 We analyzed the hydraulic and biological characteristics of the submarine biological filtration process tank and the precipitation tank in the wastewater treatment plant. The stuff, the structure of the facilities and the aeration unit are not to benefit the formation and growth of biofilm.5 We choose the R-120-60 stuff to treat the hospital wastewater. Furthermore, we tested the submerged biofilm process, formation of biofilm and removal efficiency ofbiofilm. We obtain the relevant parameters, Lv=1.8KgCOD/m3 d(HRT=4h). It is the benefit foundation of the technological design in the future.6. Disinfection is important technical in the process of the hospital wastewater treatment. We got the properly quantity of the hospital wasterwater by the NaClO disinfection. |
