Sloping bottom type subsurface flow constructed wetland combined system

Abstract

The invention discloses a sloping bottom type subsurface flow constructed wetland combined system, and relates to a sloping bottom type subsurface flow constructed wetland combined system applicable to slope topography. The sloping bottom type subsurface flow constructed wetland combined system is mainly used to solve the problems that a conventional constructed wetland technology is difficult to be applied to the slope topography, or a purification space is idle, a treatment effect is bad, the construction cost is high, the cost-efficiency ratio is low and the like when the conventional constructed wetland technology is applied to the slope topography. The constructed wetland combined system is formed by connecting at least three-stage pool body units which are distributed in a stepped manner from top to bottom according to the slope gradient in series, the pool bottom of the pool body units is a slope surface, and the pool body units are sequentially an aeration pool unit, a horizontal flow constructed wetland unit and an up-flow constructed wetland unit from top to bottom. The sloping bottom type subsurface flow constructed wetland combined system brakes through the limitation to the application of constructed wetlands caused by the slope topography, is good in treatment effect, simple in structure, simple and convenient to construct and low in cost, expands the application range of the constructed wetlands, and can be widely applied to treatment of various types of sewage in slope regions such as mountain lands, hills and water body banks.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering, and relates to an inclined-bottom compound vertical flow artificial wetland system suitable for various sewage treatment in slope areas such as mountains, hills, and water body slopes. Background technique [0002] Due to the scattered population and pollution sources in mountainous and hilly areas, and the lack of sufficient flat space, it is usually difficult to build large-scale sewage treatment facilities to centrally treat various types of sewage such as domestic sewage, industrial wastewater, and agricultural and animal husbandry non-point source pollution in the area. Constructed wetland technology is a sewage purification technology based on the principle of natural wetland water purification. By artificially making soil, sand, stone and other materials into a matrix in a certain proportion, and planting selected pollution-resistant plants, cultivating a variety of microo...

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Problems solved by technology

Since the application is essentially a slope protection system, it cannot achieve a good treatment effect of stagnating constructed wetland and purifying sewage in situ

The slope subsurface flow artificial wetland developed by the patent application number 200910199374.X has the problem that the upper half of the wetland pool cannot store water. The slope subsurface flow artificial wetland developed by the patent application number 201310475839.6 has the slope space in the lower half of the pool body. The problems of unusability and inability to store water in the pool body lead to severe compression of the purification space of the constructed wetland and limited purification capacity

The patents with the application numbers 201210030589.0 and 201410229651.8 respectively developed unique constructed wetland systems that can be used on slopes. Both of these two constructed wetlands have the problem that the bottom of the wetland needs to be leveled, which makes wetland construction difficult and expensive.

In addition, due to the use of vertical flow, the vertical space of the slope has not been effectively utilized, and there are problems such as the complexity of the water distribution pipe network and the increase in construction costs.

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