Composite constructed wetland structure suitable for cold region

Abstract

The invention discloses a composite constructed wetland structure suitable for a cold region. The composite constructed wetland structure comprises a water distribution tank, a vertical subsurface flow type constructed wetland, a horizontal subsurface flow wetland and an oxidation pond multi-stage combination. wastewater firstly flows into the water distribution tank to be pretreated, and gravels and large suspended solids are removed. Then the wastewater flows into the vertical subsurface flow type constructed wetland for percolation treatment, then passes through the horizontal subsurface flow wetland and finally flows into the oxidation pond. The vertical subsurface flow type constructed wetland comprises a descending vertical constructed wetland unit and an ascending vertical constructed wetland unit, the three columns of constructed wetland pool bottom inner bed layer filling matrixes are of a layered structure, and plant combinations are planted at the top of a filler layer. The upstream of the pool body is provided with a water inlet groove, two sides of the pool body are respectively provided with a water outlet groove, multi-point water distribution is adopted, and the bottom is provided with a drain pipe and connected with a hose. The problem that in the prior art, an artificial wetland is prone to freezing or blocking under the low-temperature condition and consequently shutdown is caused can be effectively solved, the water purification efficiency is improved, a good landscape zone is built, and the occupied area is saved.

Description

technical field [0001] The invention relates to the fields of sewage restoration and water environment treatment, in particular to a composite constructed wetland structure, especially to a vertical underflow-horizontal underflow constructed wetland structure based on functional fillers suitable for cold regions. Background technique [0002] Constructed wetland is a comprehensive ecological system constructed, maintained, managed and operated by humans. By imitating natural wetlands, under the comprehensive action of biological filter beds composed of substrate, higher aquatic or wet plants and microorganisms in the system, the interception, Adsorption, precipitation, absorption transformation and other physical, chemical and biological multiple synergies are used to achieve efficient purification of sewage. Compared with conventional water treatment technologies, constructed wetlands are more suitable for the prevention and control of water body pollution such as rivers an...

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Problems solved by technology

[0005] The main technical problem to be solved by the present invention is to provide a composite constructed wetland structure suitable for cold areas, which can solve the problem in the prior art that the constructed wetland is easy to freeze or block at low temperature and cause shutdown, improve the efficiency of water body purification, and create a good environment. Landscape belt and save floor space

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