Abstract
As the raising of environmental protection requirements, the outlet water (tailwater) quality standards of many sewage treatment plants need to be further improved. This paper mainly introduces the advanced treatment of tailwater from sewage treatment plant of vein industrial park by artificial ecological lake. The designed processing amount of this project was 1300 m3/d, the inlet water COD was 30 mg/L, the ammonia nitrogen content was 1.5 mg/L, and the outlet water main index reached the surface water environment quality standard (GB3838-2002) Ⅲ class water quality standard, which had improved the outlet water (tailwater) quality of sewage treatment plants and improved the regional water environment quality. By constructing an artificial landscape lake, the resource utilization of tailwater can be realized.
Highlights
With the rapid development of China's economy, the output of domestic sewage and industrial wastewater has increased significantly, seriously polluting water bodies
The construction and operation of sewage treatment plants at all levels has reduced some of the pollutants entering the water body, but the outlet water of these sewage treatment plants still contains a large number of pollutants, which is still an important source of pollution for the receiving water body [1]
It is necessary to carry out advanced treatment of the outlet water from the sewage treatment plant[3]
Summary
With the rapid development of China's economy, the output of domestic sewage and industrial wastewater has increased significantly, seriously polluting water bodies. The ecological engineering technologies (artificial wetlands, biological floating islands, etc.) can meet the technical requirements of advanced treatment, which have the advantages of low investment, maintenance and operating costs, simple management, good treatment effect, small secondary pollution, and strong impact resistance [5, 6]. Utilizing these advantages of artificial wetlands and the environmental landscaping value of wetland plants, the fully combination of sewage treatment and the creation of ecological landscapes has good economic, ecological and social benefits [7]. Citizens and foreign tourists provided a leisure place that integrates life and rest, ecological popularization and education, which greatly reduced the pollutants emission, while making full use of water resources and beautifying the environment
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