Novel vertical flow automatic aeration annular artificial wetland system

Abstract

The invention discloses a novel vertical flow automatic aeration annular artificial wetland system which is characterized by comprising a diversion channel (1), an annular downstream pool (2), an annular upstream pool (3), a water collecting tank (4), a reflux pump (5) and a hollow circular flow jet device (7), wherein the diversion channel (1) is provided with a concave opening, two ends of the diversion channel (1) are respectively provided with a water inlet, and the inner side of the diversion channel (1) is 5-10cm lower than the outer side of the diversion channel (1); the annular downstream pool (2) is connected with the diversion channel (1), the bottom of the right of the annular downstream pool (2) is provided with an opening with the size of 20-30cm, the right wall of the annular downstream pool (2) is 10-20cm lower than the left wall of the annular downstream pool (2), and the annular downstream pool (2) is filled with oil sand and gravels and is additionally provided with plants; the annular upstream pool (3) is connected with the annular downstream pool (2), the right of the annular upstream pool (3) is 10-20cm lower than the left of the annular upstream pool (3), and the annular upstream pool (3) is filled with fine sand and shingles and is additionally provided with herbaceous plants; and the water collecting tank (4) is connected with the annular downstream pool (2), and sewage is reflowed by the reflux pump (5) and is jet to the diversion channel (1) through the hollow circular flow jet device (7).

Description

technical field [0001] The invention belongs to the technical field of sewage treatment in environmental engineering, and more specifically designs a circular artificial wetland system with vertical flow automatic oxygenation, which is suitable for domestic sewage, polluted surface water and non-point source sewage. Background technique [0002] Constructed wetlands are a new type of wastewater treatment process developed in the 1970s and 1980s. Due to the characteristics of high efficiency, low investment, and low operating costs, this method has been widely used in the treatment of oily wastewater, domestic sewage, aquaculture wastewater and Lake pollution control and other fields, but due to uneven water distribution, unreasonable filler gradation, limited oxygen transmission by plants, and great influence by ambient temperature, the artificial wetland is blocked and insufficient oxygen supply forms a serious reducing environment, which also limits The nitrification of mi...

AI Technical Summary

Problems solved by technology

[0006] 1. The ventilation pipe is self-flowing air ventilation, and the air transfer efficiency is not high; and the laying of multi-layer ventilation pipes increases the infrastructure investment of the wetland system

[0007] 2. The method of wind energy oxygenation is greatly restricted by region and climate, resulting in unstable treatment effect of wetland system

[0008] 3. None of the three aeration methods create the optimal aerobic and anaerobic environmental conditions required for nitrification and denitrification reactions, resulting in NO in wetland effluent 3 - concentration increases, the removal rate of nitrogen decreases

[0009] 4. The three aeration methods are to directly bury the open-hole ventilation pipe in the matrix of the wetland system, and fine sand and gravel can easily block the opening of the ventilation pipe

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