Sewage treatment method

biological phosphorus removal

In the process of economic development, the main rivers and lakes in China are seriously eutrophicated due to phosphorus pollution. In order to control phosphorus pollution, the State Environmental Protection Bureau has formulated relatively strict standards for phosphorus emissions. The chemical enhanced biological phosphorus removal wastewater treatment process mainly removes organic pollutants and various forms of phosphorus in wastewater. This wastewater treatment process integrates chemical phosphorus removal and biological phosphorus removal. Volatile organic acids are produced by anaerobic digestion of activated sludge in the biological system. As the matrix or nutrient for the growth of phosphorus accumulating bacteria, the phosphorus accumulating bacteria selectively proliferate in the activated sludge and return them to the biological system, the biological sewage treatment system works in a highly efficient phosphorus removal state; at the same time, the phosphorus produced by the sludge under anaerobic conditions is released and eliminated by chemical phosphorus removal. This is an efficient municipal sewage treatment technology, which meets the requirements of further phosphorus removal on the basis of conventional secondary sewage treatment in order to solve the eutrophication of water bodies at the present stage in China.

cycle gap

The level of economic development in our country varies greatly from place to place, and cities with lagging economic development cannot spend a lot of funds for sewage treatment. Therefore, how to use limited funds to reduce environmental pollution is a problem faced by many city governments. In terms of sewage treatment, until recently, some cities used primary or primary enhanced treatment technology, and the effluent did not meet the requirements of the national secondary discharge standard for the removal of organic pollutants. The cyclic intermittent aeration process gives full play to the advantages of high-load oxidation ditch treatment efficiency, and makes full use of the good effluent characteristics of the sequencing batch activated sludge wastewater treatment process to ensure that the system effluent meets the requirements of the national wastewater discharge standard in the removal of organic pollutants. In terms of investment and operating costs, it is about 30% lower than the secondary biological sewage treatment system, which usually removes organic pollutants. It is a process technology suitable for the current sewage treatment requirements of our country.

Rotating contact

Rotary contact oxidation wastewater treatment technology is a new generation of aerobic biofilm treatment technology developed on the basis of biological rotating disc technology and combined with the advantages of biological contact oxidation technology. Rotary contact oxidation wastewater treatment technology and complete equipment provide a simple and reliable wastewater treatment method. The rotating shaft in the entire sewage treatment system is a rotating part. Once the machine fails, the general mechanical personnel can repair it. System biomass automatically compensates for changes in organic load. The microorganisms attached to the turntable are alive. When the organic matter in the sewage increases, the microorganisms increase. On the contrary, when the organic matter in the sewage decreases, the microorganisms decrease. Therefore, the working effect of the sewage treatment system is not easily affected by sudden changes in flow and load and power outages. Low operating costs, only other aeration wastewater treatment systems consume 1/8 to 1/3. The footprint is only half that of the conventional activated sludge process. Due to the variety of microorganisms growing in the biological system, it can efficiently treat various refractory industrial wastewater.