Double-layer unpowered household domestic sewage treatment device and sewage treatment method

Abstract

The invention discloses a double-layer unpowered household domestic sewage treatment device, which comprises a box body, a water inlet pipe and a water outlet pipe; wherein a substrate for treating sewage is laid in the box body, and the substrate is arranged in the box body in an up-down layered mode and comprises an upper artificial wetland layer and a lower sand type reaction layer; the water outlet end of the water inlet pipe is arranged at the lower part of the box body and is communicated with the sand type reaction layer; the water inlet end of the water outlet pipe is arranged at the upper part of the box body and is communicated with the artificial wetland layer. The invention further discloses a household domestic sewage treatment method. The domestic sewage treatment device is simple and compact in structure, convenient to use and easy to manage; the device adopts a bottom-to-top water inlet mode for treatment, is specially used for treating domestic sewage (grey water and not including black water) of a single farmer, is small in occupied area and less in mounting labor, deoes not need energy participation in the treatment process, and has a better water quality purification effect and sewage treatment efficiency.

Description

technical field [0001] The invention relates to the technical field of artificial wetland sewage treatment, in particular to a double-layer non-powered household domestic sewage treatment device and a sewage treatment method. Background technique [0002] With the in-depth development of the improvement of the rural living environment, the domestic sewage of rural households living in a concentrated manner has a variety of technologies of "pipe network collection and centralized treatment", but the domestic sewage treatment of scattered rural households faces the problem of long collection pipelines and difficult treatment. The cost is high, and the domestic sewage of farmers in low-lying areas cannot flow into centralized treatment facilities by itself. [0003] Therefore, the existing technology proposes to use the constructed wetland system to deal with related problems. The constructed wetland system is a controllable wetland system constructed by simulating the structur...

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Problems solved by technology

However, the above-mentioned existing vertical flow constructed wetlands have a complex structure and a large area, and all adopt a top-down filtration method. The sewage can only infiltrate downwards based on gravity. Since the matrix is ​​mainly composed of soil, sand, etc., Therefore, pollutants are easy to accumulate on the substrate, resulting in the reduction of the adhesion effect of the biofilm formed on the surface of the substrate, and even clogging occurs after a short period of operation, which not only greatly reduces the water purification effect and sewage treatment efficiency, but also Reduced service life of vertical flow constructed wetlands

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