All-terrain subsurface flow constructed wetland combination system and application thereof

Abstract

The invention belongs to the technical field of environmental engineering, and relates to a subsurface flow constructed wetland combination system and the application of the system. The constructed wetland combination system comprises three wetland units (16, 17 and 18), wherein the three wetland units respectively comprise wetland unit frames (13, 14 and 15), water distribution pipes (1, 3 and 5), water collecting pipes (2, 4 and 6), a water inlet pipe (19), connecting pipes (20 and 21), a water outlet valve (7), a vertical water outlet pipe (8) and a siphon (9), wherein the wetland units (16, 17 and 18) are connected with one another by the water collecting pipes (2, 4 and 6) or the water distribution pipes (1, 3 and 5), the wetland units (16, 17 and 18) are internally filled with substrates (10, 11 and 12), and the three wetland units are vertically distributed in a gradually-falling shape. The system and the application of the system provided by the invention have the advantages of being high in the adaptability to terrain, better in nitrogen and phosphorus removal effect for a water body, hard to block, convenient in operation, maintenance and management, low in project capital construction cost and running cost and the like.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering, and relates to an underflow constructed wetland combination system and its application. Background technique [0002] Due to its small footprint and high purification efficiency, subsurface flow constructed wetlands have been widely used in recent years. Subsurface wetlands mainly use wetland substrates, plants and microorganisms to treat polluted water bodies under various physical, chemical and biological effects. The wetland unit is filled with substrates of different particle sizes and varieties, which can absorb and retain suspended solids, ammonia nitrogen, phosphorus, etc. in the water body; various wet plants are planted on the substrate, and the nitrogen, nitrogen, and phosphorus absorbed during plant growth are transferred by harvesting the aboveground parts. Phosphorus, organic matter, heavy metals and other pollutants; microorganisms attached to the surface of the s...

AI Technical Summary

Problems solved by technology

However, from the perspective of water quality assurance, if the tail water is discharged into the landscape river as a supplementary water source without advanced treatment, this will further deteriorate the water quality of the already eutrophic river.

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