High-load constructed wetland rector based on light stuffing

Abstract

The invention discloses a high-load constructed wetland reactor based on light stuffing. The high-load constructed wetland reactor is used for deeply processing tail water of an urban sewage plant and is provided with a gravel stuffing layer, a light stuffing layer and a modularized wetland plant planting system from bottom to up; the light stuffing is of a net-fiber porous structure, large in specific surface area, high in porosity and good in biological affinity, can obviously improve the amount of microorganisms on a wetland stuffing carrier and can improve the removal efficiency of pollutant in sewage; the modularized wetland plant planting system uses the light stuffing as a supporting carrier for planting wetland plants, the light stuffing is compressed and then arranged in a hollow concrete plant planting module, and the light stuffing is high in porosity and better in ventilation and water permeability and can facilitate growth of plant roots; the system can be assembled and disassembled at will and brings convenience to maintenance, renovation and landscape design of a constructed wetland. The reactor has the advantages of being low in cost, low in requirement for a civil structure, short in starting time, high in processing load, small in occupancy, convenient to operate and maintain and good in landscape effect.

Description

technical field [0001] The invention belongs to the technical fields of sewage treatment and environmental protection, and in particular relates to an artificial wetland reactor. Background technique [0002] At present, urban sewage is directly discharged into natural water bodies after being treated by treatment plants. However, due to the high concentration of nitrogen pollutants in the tail water of urban sewage plants, there is still a large gap compared with the environmental standards of surface water. When the tail water is discharged to Closed, semi-closed and other slow-flowing water bodies are likely to cause environmental problems such as eutrophication of the water body. How to treat the tail water of sewage treatment plants with low cost and high efficiency, and further reduce the water pollution load has become an urgent problem to be solved. [0003] In recent years, the artificial wetland technology used for the advanced treatment of tail water of sewage tr...

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Problems solved by technology

In order to achieve advanced treatment efficiency, the above-mentioned reactor has a long process flow and a relatively complex structure, and the wetland material is mainly sand and gravel, the microbial biomass on the sand and gravel carrier is small, the removal efficiency of pollutants is low, the wetland covers a large area, and the investment is high

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