What are the impacts of urban sewage treatment plants on the environment

With the continuous deepening of energy saving and emission reduction work in our country, urban sewage treatment plants, as the main carrier of emission reduction, are particularly important in emission reduction work. However, if sewage treatment plants are not properly constructed, they will have an impact on the surrounding environment.

1. Impact on ecology
Since urban sewage treatment plants are usually built in the suburbs around the city, the sewage collected from the urban area needs to be sent to the sewage treatment plant through pipelines and sewage lifting pump stations. The construction of pipelines will destroy the ecology of the land and rivers passing through. system, the waste soil piled up during its construction not only needs to occupy the land, but also destroys the original ecosystem of the land. During the construction and reconstruction of sewage pipe network in urban areas, the noise, dust and construction waste water during the construction process will affect urban residents, and the spoils produced will affect the occupied land ecosystem.

2. The influence of stench
The stench of urban sewage treatment plants mainly comes from grilles, pump rooms, grit chambers, reaction tanks, sludge tanks, etc. Since the wastewater contains nitrogen, sulfur, chlorine, phosphorus and other pollutants, it is formed with the humification and fermentation of wastewater stench.

3. The influence of noise
The noise sources of urban sewage treatment plants mainly include fans, water pumps and water flow, etc., especially the noise of fans, with a sound level as high as 105dB. Although urban sewage treatment plants are generally far away from residential areas and have little impact on surrounding residential areas, for operators, long-term exposure to strong noise working environments may cause deafness and damage the central nervous system and autonomic nerves of the human body.

4. The impact of sludge
Sludge is produced in urban sewage treatment, which is generally 1% to 2% of the sewage treatment volume, and the amount of sludge generated is large. Sludge not only contains a large number of pathogens, microorganisms, parasites, germs and organic matter, but also contains heavy metals such as mercury, chromium, cadmium, lead, etc. Improper treatment will have an impact on soil, groundwater, surface water, etc.

5. The impact of drainage
The final discharge after treatment by the urban sewage treatment plant has an impact on the received water body. When the urban sewage is treated up to the standard after normal treatment, a section of mixed zone will be formed around the outlet after the drainage enters the river. The production and life of residents along the line. Especially under abnormal working conditions, the sewage cannot be discharged up to the standard after treatment, and a large excess zone will be formed in the water body of the storage and drainage, which will have a serious impact on the production and life along the line.

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