Introduction of Gaobeidian Sewage Treatment Plant

Gaobeidian Sewage Treatment Plant is located in Gaobeidian Township, Chaoyang District, Beijing. It is the largest sewage treatment plant in Beijing, and also the third largest sewage treatment plant in China at present. The first phase of Gaobeidian Sewage Treatment Plant was completed and put into operation on October 24, 1993, with a capacity of 500,000 m3/d. The second phase of the plant was completed and put into operation at the end of 1999, with a capacity of 1,000,000 m3/d. Beijing produces more than 2,500,000 tons of sewage every day, and nearly half of the sewage is treated here. Gaobeidian sewage treatment plant sewage system basin area of 96 square kilometers, serving a population of 2.4 million people, covering an area of 68 hectares. It collects most of the domestic sewage from the southern part of Beijing, and all the sewage from the industrial area in the eastern suburbs, the embassy area and the chemical road. The secondary effluent from the Gaobeidian Wastewater Treatment Plant is discharged directly into the lower reaches of the Tonghui River. The Gaobeidian Wastewater Treatment Plant has also become an attraction during the Olympic Games, adding to the Green Olympics.

The treatment process adopts the traditional activated sludge method of secondary treatment process: the primary treatment includes grating, pumping station, aeration sand sedimentation tank and rectangular advection sedimentation tank; the secondary treatment adopts the air aeration activated sludge method. The sludge treatment adopts two-stage digestion technology at medium temperature, and the dewatered mud cake after digestion is transported out as the fertilizer source for agriculture and greening. The biogas produced in the digestion process is used to generate electricity to solve part of the plant's electricity consumption. The plant also has a depth treatment facility of about 10,000 cubic meters per day, and the treated water is used for production and greening in the plant, which not only effectively saves water resources, but also accumulates useful experience for large-scale reuse of wastewater.

Gaobeidian reclaimed water plant daily treatment scale of 1 million tons, is the largest reclaimed water plant. Reclaimed water depth treatment using a "denitrification biological pool + ultrafiltration membrane" process, that is, the secondary treatment of the effluent into the denitrification pool denitrification, phosphorus removal, and then filtered by the ultrafiltration membrane, that can effectively remove the particles in addition to suspended solids, algae, bacteria, viruses, colloids, proteins, and other insoluble pollutants, etc.. Sewage after this part of the purification, out of the membrane after the water has to then ozone oxidation decolorization, ultraviolet disinfection.

After deep treatment of reclaimed water is mainly used in the urban areas of Beijing landscape environment water, industrial water, urban miscellaneous, etc., can greatly save high-quality tap water resources, protect and improve the quality of urban landscape water bodies.