A device and process for enhanced denitrification of constructed wetlands suitable for northern cold regions
A technology for constructed wetlands and cold areas, applied in aerobic and anaerobic process treatment, chemical instruments and methods, biological water/sewage treatment, etc., can solve problems such as uneven water replenishment and poor denitrification effect in constructed wetlands
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[0023] The implementation of the present invention will be described in detail below in conjunction with the drawings and examples.
[0024] Such as figure 1 and figure 2 As shown, a backflow type denitrification strengthening device for artificial wetlands in cold regions includes a rectification area 17, and a number of deflectors 3 are arranged inside the rectification area 17 along the width direction, and the rectification area 17 is evenly divided into several sub-areas. The aspect ratio of each commutator sub-region is controlled to be ≥4. The space between the deflectors 2 is filled with asphalt-wrapped gravel packing 1 with a particle size of 1-2 cm.
[0025] At the bottom of the rectification area 17, a large-resistance water distribution pipe 4 and an aeration pipe 5 are laid, wherein the large-resistance water distribution pipe system 4 is arranged at the front of the rectification area 17, and the aeration pipe 5 is arranged at the middle and rear of the rectif...
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