Device and method for denitrifying and dephosphorizing ecological protection multi-level filtration wall in water source area on rural land surface

Abstract

The invention relates to a device and a method for protecting the ecology in a water source area on a rural land surface. The device is formed by integrating multi-level functional filtration walls and comprises a water distribution channel, an aerobic segment filtration wall, an anoxic segment filtration wall, a biological reinforcement purification filtration wall, a water collection sedimentation tank and an excessive water overflow groove, wherein the aerobic segment filtration wall, the anoxic segment filtration wall and the biological reinforcement purification filtration wall are connected in series with one another. The invention has the advantages that: the method has a good treatment effect, is low in investment and operation cost, is simple in maintenance, makes the functional characteristics of all levels of filtration walls distinctive, is definite in labor division, is used for treating rural domestic sewage and farmland initial-stage runoff drained water, is suitable for biological protection on the water source area of the rural land surface, a lake reservoir and the like, can be used for treating small-scale domestic sewage and is an economic and effective method for biological protection and small-scale domestic sewage treatment.

Description

technical field [0001] The invention relates to a nitrogen and phosphorus removal device and method for a multi-stage filter wall for ecological protection of rural surface water sources. The invention belongs to the technical field of purification and ecological restoration of polluted water bodies for environmental protection. Background technique [0002] At present, the ecological protection of rural surface water sources, lakes and reservoirs mainly includes methods and measures such as artificial wetlands, aquatic plant beds and front reservoirs. Constructed wetlands are simple and easy to implement, but usually the denitrification effect is poor. It is often difficult to remove nutrients such as nitrogen and phosphorus that cause eutrophication in drinking water sources, lakes and reservoirs, etc. only by plant absorption; , its pollutant removal effect is often difficult to be guaranteed; front-end reservoirs are mainly ecological purification, and their treatment o...

AI Technical Summary

Problems solved by technology

Constructed wetlands are simple and easy to implement, but usually the denitrification effect is poor. It is often difficult to remove nutrients such as nitrogen and phosphorus that cause eutrophication in drinking water sources, lakes and reservoirs, etc. only by plant absorption; , its pollutant removal effect is often difficult to be guaranteed; front-end reservoirs are mainly ecological purification, and their treatment objects are usually low-concentration sewage mixed with non-point source pollution generated in the process of rural life and production, as well as precipitation runoff pollution, etc. The treatment efficiency is low, the treatment effect is not good, and the hydraulic retention time is usually required to be long, and the floor area is large

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