Quasi-undercurrent aeration constructed wetlands

Abstract

The invention provides quasi-undercurrent aeration constructed wetlands, which comprise a wetland main body, a water distribution board, a watertight shutter, a rheid meshed packing layer, a vermiculite packing layer, a soil packing layer, a packing frame and an aeration tube, wherein the inside of the wetland main body is provided with the water distribution board and the watertight shutter; the meshed packing layer, the vermiculite packing layer and the soil packing layer are sequentially arranged between a space between the water distribution board and the watertight shutter from the bottom to the top; the meshed packing layer adopts an arrangement structure that meshed packing is longitudinally arranged near both sides of the water distribution board and the watertight shutter, the meshed packing is tangential to a water flow direction, and the meshed packing of the middle part is arranged horizontally; the mesh bottom of the meshed packing layer is 4 to 8 centimeters away from the bottom of the wetland main body; the meshed packing is hung on the packing frame; wetland plants are planted on the soil packing layer; and the aeration tube is arranged on the bottom between the water distribution board and the watertight shutter. The quasi-undercurrent aeration constructed wetlands have the characteristics of multiple designs and multiple guarantees so as to prevent the wetlands from being blocked and effectively process sewage in high quality.

Description

technical field [0001] The invention relates to an underflow artificial wetland, which belongs to the technical field of sewage purification. Background technique [0002] Constructed wetland sewage treatment technology is a new technology of sewage treatment ecological engineering. It has been widely valued by environmental protection scientists because of its advantages of low investment, low energy consumption, ecological environmental protection, and convenient management. As a type of constructed wetland, subsurface flow constructed wetland is less affected by climate, has high space utilization rate, and fully exerts the synergy between systems, greatly improving the sewage treatment capacity, and has broad application prospects. However, the traditional methods mostly use stones and gravels as fillers. When the particle load is high, the insoluble matter will accumulate and block easily, making the water flow unsmooth and the function of the wetland reduced. Content...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the deficiencies of the existing subsurface flow artificial wetland technology, the present invention provides a quasi-subsurface flow aerated artificial wetland with combined use of soft and hard fillers, which is not prone to blockage, simple in structure, low in cost, stable in performance, and high in sewage treatment efficiency.

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