CCB buried sewage treatment equipment that outlines the purification principle
The underground sewage CCB hospital sewage treatment equipment has one performance to solve the four processes of aeration, sedimentation, secondary aeration and secondary precipitation of hospital sewage treatment. The clean water discharged from the sewage treatment equipment of the buried CCB hospital will automatically flow to the disinfection tank. The disinfection can be carried out by chlorine dioxide, sodium hypochlorite, calcium hypochlorite, ultraviolet light, olfactory oxygen, sustained-release trichloro disinfectant tablets, etc. To achieve the purpose of disinfection.
Buried CCB hospital sewage treatment equipment purification principle:
The hospital sewage first passes through the grid well to remove the large suspended solids in the sewage, and ensures that the subsequent equipment such as the sewage pump operates normally and stably. The sewage after the grid enters the regulation tank, and regulates the amount of sewage water, water peaks and uniform water quality to reduce the peak load, which is conducive to the subsequent treatment. The adjusted sewage pump is lifted to the water distribution tank and enters the sewage treatment equipment of the buried CCB hospital. The sewage treatment equipment of the buried CCB hospital adopts U-shaped double-cone structure, which is divided into convective contact oxidation zone, diversion and sedimentation recirculation zone, and biological filtration. The district is composed of three parts. The sewage from the water distribution tank first enters the inner cone, from top to bottom, through the gap between the gaps of the filler, the air goes from bottom to top, and the space of the filter material is tortuously increased, and the convection is in full contact with the biofilm attached to the sewage and the filler. , gas, liquid and solid three-phase reaction occurs under aerobic conditions. The water after the reaction passes through the diversion pipe to the diversion and separation zone to realize muddy water separation, sludge sedimentation, activated sludge efflux and reflux. After the water after the reaction is led to the outer cone, the water and the air are from bottom to top, and the space between the fillers is bent to increase the contact with the biofilm attached to the filler. Under aerobic conditions, gas, liquid and solid are further generated. Phase reaction. Since the biofilm adheres to the filler and is not restricted by mud, it is rich in variety and is very beneficial for the degradation of pollutants. The pollutants are adsorbed and intercepted on the surface of the filler as a nutrient substrate for the degrading bacteria, accelerating the degradation of the bacteria to form a biofilm, and the biofilm further "captures" the substrate, assimilate, metabolize and degrade it. In the combined treatment of carbon oxidation and nitrification, the concentration of organic pollutants in the inlet section of the CCB bioreactor is high, and the heterotrophic flora is dominant. Most of the carbonaceous pollutants CODcr, BOD5 and SS are degraded here. Removed and the concentration gradually decreases. In the lower part of the inner cone and the upper part of the outer cone, autotrophic bacteria such as nitrifying bacteria predominate, ammonia nitrogen is nitrified in the biofilm and a large amount of activated sludge accumulated in the gap between the materials, and there are facultative microorganisms.
Therefore, in the CCB buried sewage treatment equipment, the removal of carbon pollutants may occur, and the functions of nitrification and denitrification may occur. In addition to adsorption and interception, the filler and biofilm have the function of filtration. As the treatment progresses, a large amount of activated sludge accumulates between the pores of the filler. These suspended activated sludge form a sludge filter between the pores of the filler. The layer, while oxidizing and degrading the organic matter in the sewage, also plays a very good adsorption and filtration function, so that the organic matter and the suspended matter can be completely eliminated.
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