Composite artificial wetland treatment system

Abstract

The invention discloses a composite artificial wetland treatment system. The composite artificial wetland treatment system comprises a vertical flow artificial wetland treatment pond and an underflow artificial wetland treatment pond which are connected in series, wherein the vertical flow artificial wetland treatment pond is arranged at the water inlet end of the system; the underflow artificial wetland treatment pond is arranged at the water outlet end of the system. The system further comprises a water distribution box, wherein a guide wall is arranged in the water distribution box; the water distribution box is positioned at the water outlet end of the system, and a water outlet of the water distribution box is communicated with a water inlet pipe of the vertical flow artificial wetland treatment pond; filler in the vertical flow artificial wetland treatment pond consists of a large-grain-size filler layer, a medium-grain-size filler layer and a fine-grain-size filler layer in sequence from bottom to top; a water outlet is formed in the underflow artificial wetland treatment pond; filler in the underflow artificial wetland treatment pond consists of a coarse material layer, a medium material layer and a coarse material layer from left to right in sequence, and a fine material layer is further formed above the three filler layers. The total phosphorus removing effect of the artificial wetland treatment system is good, and the pH value of effluent is low in alkalinity, being about 7-9.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a composite artificial wetland treatment system using potassium feldspar as filler. Background technique [0002] Constructed wetland technology in sewage treatment has been widely valued by countries all over the world because of its advantages such as good treatment effect, low construction and operation costs, and easy maintenance and management. In recent years, as a new technology of sewage treatment, constructed wetland foundation has been developed rapidly and widely used. [0003] Constructed wetlands are completed through matrix (filler) interception, filtration, adsorption and biodegradation. In the use of traditional constructed wetlands, there will be problems such as large hydraulic height difference, high SS (Suspended Solid, suspended solids in sewage) load, and poor removal rates of ammonia nitrogen and total phosphorus. The reason is mainly the design ...

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Problems solved by technology

[0004] In the existing constructed wetland treatment system, there are two problems when the matrix is ​​used alone: ​​on the one hand, some matrix materials have a low phosphorus removal rate, such as traditional soil, sand, gravel, etc. In order to improve the removal rate, it is necessary to add Dagong wetland area; on the other hand, the phosphorus removal efficiency of the substrate is high, but the alkalinity of the effluent, such as steel slag, etc., the pH value of the effluent is as high as 10-12, which is not conducive to the growth of aquatic plants implanted on the filler and the reproduction of microorganisms

But so far there is no related report on the composite constructed wetland treatment system using potassium feldspar as filler.

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