Method for treating domestic sewage through artificial wetland

Abstract

The invention discloses a method for treating domestic sewage through artificial wetland. The method includes following steps: S5, guiding upper-layer domestic sewage in a sewage tank into artificialwetland; S6, guiding the domestic sewage after being treated in upper-layer artificial wetland into middle-layer artificial wetland and bottom-layer artificial wetland, wherein aquatic plants plantedin the middle-layer artificial wetland and the bottom-layer artificial wetland are arranged as follows: taking reed, arundo donax var versicolor, cattail and aquatic iris as emergent aquatic plants ina stabilization pond shoreside shallow area, taking water hyacinth as a main floating-leaved plant and cold-season cress as a main floating bed plant, and total plant coverage is greater than 20%. Compared with conventional technology, the method has the advantages that sewage is pretreated through process steps of filtering, aerating and precipitating, impurities and high salt in the sewage canbe separated effectively, and impact of production sewage on artificial wetland ecological environment is prevented; organic matter decomposed by the aquatic plants can provide a carbon source for wetland denitrification.

Description

technical field [0001] The invention belongs to the technical field of domestic sewage treatment, and more specifically relates to a method for treating domestic sewage in an artificial wetland. Background technique [0002] Constructed wetland is a comprehensive ecosystem. It applies the principles of species symbiosis, material recycling and regeneration, and the principle of structure and function coordination in the ecosystem. On the premise of promoting a virtuous cycle of pollutants in wastewater, it fully exerts the production potential of resources and prevents environmental degradation. Re-pollution, to obtain the best benefits of sewage treatment and resource utilization. The plants in the constructed wetland can also transport oxygen to the water body and increase the activity of the water body. Wetland plants also play an important role in controlling water pollution and degrading harmful substances. [0003] Compared with industrial wastewater, domestic sewage...

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Problems solved by technology

[0003] Compared with industrial wastewater, domestic sewage has fewer harmful chemicals. The cost of treating domestic sewage through the process of industrial wastewater treatment is too high, but it is inevitable to discharge domestic sewage to the outside and cause pollution over time.