Constructed wetland system for treating high-concentration nitrate nitrogen in groundwater efficiently

Abstract

The invention relates to a constructed wetland system for treating high-concentration nitrate nitrogen in the groundwater efficiently and belongs to the field of groundwater pollution control. The constructed wetland system is used for removing the high-content NO3<-1>-N which is a pollutant in the groundwater and recycling source water. The polluted groundwater is accumulated in a water well, surface water distribution main and branched pipes or deep water distribution main and branched pipes are uniformly in the constructed wetland by using a submersible pump according to the change of seasons, and the NO3<-1>-N in the groundwater is removed under the physical, chemical and biological actions of the soil layer, the heat insulation layer, the NO3<-1>-N conversion layer, the ion-exchange biological layer and the water accumulation layer in the constructed wetland. In winter, by filling nitrogen into the constructed wetland and adjusting the water outlet amount of the water collection well, the multifunctional composite fillers in the constructed wetland fully play a role of reducing the NO3<-1>-N and the microorganisms in the constructed wetland fully play a role of nitrifying and decomposing the NH3<-1>-N. The constructed wetland system provided by the invention is compact in structure, high in treatment efficiency and low in operation cost, occupies a small land area, can operate stably, is free from blocking, can not cause secondary pollution and ensures that the quality of the treated water completely meets the requirement of the quality of the source water.

Description

Technical field [0001] The invention relates to a constructed wetland system for efficiently processing high-concentration nitrate nitrogen in groundwater, belonging to the field of groundwater pollution control. Background technique [0002] Groundwater is an important drinking water resource and is closely related to human health and quality of life. In recent years, groundwater has been polluted by the application of chemical nitrogen fertilizers and industrial and urban sewage. The problem of nitrate nitrogen pollution in water has become increasingly serious, which has gradually attracted the attention of countries all over the world. [0003] Groundwater nitrate nitrogen pollution as early as the 1960s, many countries in Europe and the United States have noticed its seriousness, and successively began a large number of water quality investigations and detection control studies on groundwater nitrate nitrogen pollution in the 1980s. . According to reports, currently NO 3 - -...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved in this invention is how to use biological and abiotic denitrification technology to remove nitrate in polluted groundwater, and propose a wetland treatment system with high efficiency and stable operation in all seasons

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