Vertical flow constructed wetland and method for treating nitrogen, phosphorus and tetracyclines in sewage

Abstract

The invention discloses a vertical flow artificial wetland. The vertical flow artificial wetland comprises a first-stage vertical flow artificial wetland pond, a second-stage vertical flow artificial wetland pond and a third-stage vertical flow artificial wetland pond which are sequentially connected in series, wherein aerator pipes are arranged in the first-stage vertical flow artificial wetland pond and the third-stage vertical flow artificial wetland pond, filling layers are arranged above the aerator pipes, soil layers are arranged on the filling layers, and aquatic plants are planted on the soil layers; and the aerator pipe is not arranged in the second-stage vertical flow artificial wetland pond, the other inner structure of the second-stage vertical flow artificial wetland pond is same as that of the first-stage vertical flow artificial wetland pond, and a second water inlet pipe is arranged above the second-stage vertical flow artificial wetland. The invention further provides a method for treating nitrogen, phosphorus and tetracyclines in sewage by virtue of the vertical flow artificial wetland. By virtue of the purification capacity of a middle and rear segment of the vertical flow artificial wetland, the removal load is increased, and the occupied area is reduced; and the effluent index of the vertical flow artificial wetland is increased by virtue of aeration, so that the effluent reaches the standards, and a simple and feasible method for the small-scale sewage treatment is provided.

Description

technical field

[0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a vertical flow artificial wetland and a method for treating tetracyclines in sewage. Background technique

[0002] The total amount of fresh water resources in my country ranks sixth in the world, but the per capita water resources are only 2200m 3 , close to a quarter of the world average. According to the forecast of relevant departments, my country's population will reach 1.6 billion by 2030, and the per capita water resources will only be 1750m by then. 3 , which is close to the internationally recognized water shortage standard. With the rapid and stable growth of my country's national economy and the rapid advancement of urbanization, the population continues to grow, and the water demand in my country's cities and towns is also increasing. At the same time, water pollution is increasing day by day, resulting in water shortage, which makes the s...

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