Wastewater treatment process

Entire Sewage Treatment Process: Sewage → Nanmen Tang Pump Station→ Coarse Grid and Influent Pump Room→ Fine Grid and Sedimentation Tank→ Biological Tank→ Secondary Sedimentation Tank→ Disinfection Channel→ Clean Water → Nanliu River

Wastewater Treatment Plant, It adopts internationally advanced improved A2/O physical-biochemical treatment methods, with a construction target of treating 100,000 tons of compliant sewage in the near term and 200,000 tons in the long term.

reporters arrived at the sewage treatment plant, although the final construction was still underway, the prototype of a modern garden-style factory was already taking shape: advanced design and fully embodying a people-oriented philosophy. During sewage treatment, ammonia, hydrogen sulfide, and other odors are easily generated, affecting the lives of nearby residents. The factory manager accompanying the reporter said that the factory will cover and deodorize facilities that generate odors, and the construction will also consider the design and construction of deodorization processes. Apart from the water inlet, you won't notice any odors during a tour of the factory area.

The reporter experienced the entire wastewater treatment process on site. According to reports, wastewater treatment requires two stages: mechanical treatment and biological treatment. Urban After water enters the wastewater treatment plant, a coarse grid is first used to remove larger suspended solids and impurities. Here, sewage coming from the sewage pipes carries a foul odor and foams as it flows into the coarse grille. Looking at the pitch-black sewage, everyone was deeply moved: you really don't realize it until you see it, and once you do, you're shocked—they never expected the city's sewage to be so dirty.

After sewage flows through the coarse screen, it is lifted by a lift pump to a fine screen treatment device about 3 meters high, where fine suspended particles are removed through the screen. Then, after sand sedimentation treatment, the wastewater enters the biological pool through pipelines. Here, the main treatment is organic matter. Various microbial communities feed on pollutants in the wastewater in an aerobic environment, continuously growing and reproducing to purify the wastewater.

The treated wastewater then flows into the secondary sedimentation tank, which has sedimentation properties, then enters the disinfection channel, where it undergoes ultraviolet disinfection to remove various impurities, E. coli, and other pathogens. After multiple layers of process control and treatment, most carbon, nitrogen, phosphates, and organic pollutants in urban wastewater are removed. Ultimately, the compliant sewage is discharged into the Nanliu River through the outlet.

Many citizens may not know that the tap water we drink has test results far exceeding national standards. According to experts, the main water source for the water plant is the raw water from the reservoir. Under normal circumstances, turbidity does not exceed 5 degrees, and the water temperature is consistently between 13 and 15 degrees Celsius. These indicators reflect whether the water is polluted, with measured values far exceeding national standards, making it an ideal source of domestic water. To be fortunate enough to enjoy such fine water is a blessing.

While enjoying the excellent water provided by nature, we should also care about how to return clean water quality to nature. It is encouraging that the sewage discharged from the treatment plant meets Class 1B standards, fully meeting national standards. This will have a positive impact on the lower reaches of the Nanliu River, providing a stable and suitable ecological environment for the flora and fauna of the downstream basin.