Variable-flow-velocity polluted-water ecological purification system

Abstract

The invention discloses a variable-flow-velocity polluted-water ecological purification system. The variable-flow-velocity polluted-water ecological purification system includes a water inlet pipe, awater distribution area, a fast-stream inner layer area, a slow-stream outer layer area, a water collection area and a water outlet pipe; the water inlet pipe is communicated with the bottom of the water distribution area which is located at the bottom of the fast-stream inner layer area, the water outlet pipe is communicated with the bottom of the water collection area which is located at the bottom of the slow-stream outer layer area, and the fast-stream inner layer area is located inside the slow-stream outer layer area, wherein the water flow direction of the fast-stream inner layer area is upward, the water flow direction of the slow-stream inner layer area is downward, the bottom of the inner layer area is separated from the bottom of the outer layer area, the top of the inner layerarea is communicated with the top of the outer layer area, and the portion between the outer layer area and the inner layer area is filled with particle filter materials. Through a double-layer structure design method, padding of different permeability coefficients is used, so that the water flow velocity of an inner layer is higher than that of an outer layer; the variable-flow-velocity polluted-water ecological purification system is conducive to filtering and intercepting inorganic particles in a water inlet area and being combined with cultivation of aquatic plants, so that filtration, carbon cycle and nitrogen cycle processes of the particles in polluted water can compactly controlled in the same ecological purification system, and the purpose of effectively removing pollutants is achieved.

Description

technical field [0001] The invention relates to a sewage treatment method, in particular to an ecological purification system for variable flow velocity polluted water bodies. Background technique [0002] With the rapid development of social economy, my country's water environment situation is becoming increasingly severe. Many problems caused by water pollution are worrisome, and various places have successively carried out the remediation work of polluted water bodies. Under such circumstances, urban point source pollution control has achieved certain results, but in the vast rural areas, the problem of water pollution has become more prominent. [0003] Pollutants produced in rural life and production processes, such as domestic sewage in villages and towns, chemical fertilizers and pesticides applied in farmland, and animal manure in aquaculture, etc., are washed by precipitation and runoff, and enter rivers, lakes, reservoirs, and bays through surface runoff In other...

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Problems solved by technology

However, engineering practice has found that the large amount of inorganic particles in rural se

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