Constructed wetland system

Abstract

The invention discloses a constructed wetland system. The constructed wetland system comprises a constructed wetland pool, a water inlet pipeline, an aerating device, a water outlet unit and immobilized microorganism plates, wherein the constructed wetland pool comprises the following five layers from top to bottom in sequence: a sand layer, a sand-gravel layer, an immobilized microorganism layer, an artificial mixed matrix layer and a gravel layer; the water inlet pipeline composed of a water inlet pipe and a water distribution branch pipe is arranged at the gravel layer; the immobilized microorganism plates are installed at the immobilized microorganism layer; the aerating device is installed below the immobilized microorganism plates; a steel wire mesh is arranged between the immobilized microorganism layer and the sand-gravel layer; the water outlet unit comprises a water outlet, a catch basin and a catch basin drain pipe; the constructed wetland pool is of a reinforced concrete structure; impermeable layers are arranged on the inner side walls and bottom surface of the pool body; and cattail is planted in the sand layer. The constructed wetland system organically combines a microbiological method with the constructed wetlands, thus effectively improving the sewage treatment efficiency of the constructed wetlands.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to an artificial wetland system. Background technique [0002] Constructed wetland is a new type of sewage treatment process developed in the 1970s. It utilizes the triple synergy of physics, chemistry and biology in the natural system to purify sewage. Constructed wetland sewage treatment technology has the advantages of good treatment effect, high nitrogen and phosphorus removal rate, convenient operation and maintenance, low engineering infrastructure and operation costs, so it is widely used in domestic sewage treatment, industrial sewage treatment, mining and oil exploration, agricultural sites source and non-point source pollution and water eutrophication. [0003] The traditional activated sludge method is widely used in sewage treatment, mainly because activated sludge contains a large number of active microorganisms, which can quickly and effectively remove organic matter i...

AI Technical Summary

Problems solved by technology

[0004] Compared with other traditional sewage treatment processes, the constructed wetland has a longer hydraulic retention time in the sewage treatment process. The organic matter, nitrogen, phosphorus and other harmful substances in the sewage of the constructed wetland are mainly removed by the adsorption of the filter material, and the gaps of the filter material will be absorbed. A small amount of microorganisms, microorganisms can remove organic matter and nitrogen and phosphorus in sewage by their own action, but the microbial content in the filter material is small, so the microbial action is limited, and excessive free microorganisms can easily lead to filter material blockage

Images