The flow of sewage treatment plant to treat sewage

The flow of sewage treatment plant to treat sewage is shown below:

1, biological phosphorus removal

In the process of economic development, China's major rivers and lakes due to phosphorus contamination, eutrophication is serious, the State Environmental Protection Agency for the control of phosphorus pollution, the phosphorus discharge has set a more stringent standards. Chemical enhanced biological phosphorus removal sewage treatment process to remove organic pollutants and various forms of phosphorus in sewage, this sewage treatment process will be chemical phosphorus removal and biological phosphorus removal integration, through anaerobic digestion of activated sludge in the biological system to produce volatile organic acids, as a substrate for the growth of polyphosphorus bacteria or called nutrients, so that the polyphosphorus bacteria in the activated sludge to selectively proliferate, and back to the biological system, so that the biological wastewater treatment system works in the state of high efficiency phosphorus removal; at the same time, the phosphorus release produced by sludge under anaerobic conditions is eliminated by chemical phosphorus removal. This is a high-efficiency municipal wastewater treatment process technology to meet the current stage of China, in order to solve the eutrophication of water bodies, the need for further phosphorus removal on the basis of conventional secondary sewage treatment requirements.

2, circular gap

China's economic development level varies greatly from place to place, the city of lagging economic development can not come up with a lot of money for sewage treatment, therefore, how to use the limited funds to reduce environmental pollution, is a lot of city governments are facing problems. In terms of sewage treatment, until recently, some cities still use a level or a level of enhanced treatment process technology, the water does not meet the national secondary emission standards for the removal of organic pollutants. Cyclic intermittent aeration process to give full play to the advantages of high-load oxidation ditch treatment efficiency, but also make full use of sequential batch activated sludge wastewater treatment process of good water characteristics, to ensure that the system effluent to meet the national sewage discharge standards in the first level of organic pollutants in addition to the requirements of the requirements. In the investment and operating costs than usually to remove organic pollutants mainly in the secondary biological sewage treatment system to reduce about 30%, is suitable for China's current stage of sewage treatment requirements of the technology.

3, rotary contact

Rotary contact oxidation wastewater treatment process technology is based on biological turntable technology, combined with the advantages of biological contact oxidation technology developed a new generation of aerobic biofilm treatment technology. Rotary contact oxidation sewage treatment process technology and complete sets of equipment provides a simple and reliable sewage treatment method. The rotating shaft in the whole sewage treatment system is the only rotating part, and once the machine breaks down, general mechanical personnel can repair it. The system biomass automatically compensates for changes in organic load. The microorganisms attached to the rotor are alive, when the organic matter in the sewage increases, the microorganisms increase with it, and on the contrary, when the organic matter in the sewage decreases, the microorganisms decrease with it. So the working effect of this wastewater treatment system is not easily affected by sudden changes in flow and load and power outages. Operating costs are low, only one-eighth to one-third of the power consumption of other aeration wastewater treatment systems. The footprint is only half that of conventional activated sludge. Due to the large variety of microorganisms growing in the biological system, it is able to efficiently treat a variety of difficult to degrade industrial wastewater.