Autonomous-operating A/O type tidal flow constructed wetland

Abstract

The invention belongs to the field of constructed wetlands, and relates to an A / O type tidal flow constructed wetland apparatus for deeply treating nitrate nitrogen, further treating organic pollutants and autonomously operating a tidal flow by a siphon forming device. The apparatus is characterized in that the apparatus comprises an upper tidal flow treatment zone 1 and a lower anoxic denitrification zone 2; each of the tidal flow treatment zone 1 and the anoxic denitrification zone 2 is a cuboid-shaped stereoscopic structure with an openmouthed top; a siphon sleeve 18 and a siphon water outlet tube 16 are arranged in the tidal flow treatment zone 1 to form the siphon device for controlling the autonomous operation of the tidal flow; and a water distribution device having a Chinese character Feng-shaped (like fishbone) shape and composed of a water distribution mother tube 27 and water distribution branch tubes 280-289 is arranged at the bottom of the anoxic denitrification zone 2 tomake water distribution of the inlet water uniform. The apparatus provides a novel tidal flow constructed wetland structure form, has the advantages of high carbon source utilization rate, strong organic matter degradation ability, small occupied area, uniform water distribution and strong anti-load impact ability, and can realize the autonomous operation of the tidal flow constructed wetland.

Description

technical field [0001] The invention belongs to the field of constructed wetlands, and relates to an A / O type tidal flow constructed wetland device used for intensive treatment of nitrate nitrogen and further treatment of organic pollutants as an autonomously operated nitrate nitrogen deepening treatment process. Background technique [0002] The A / O method is a kind of traditional activated sludge method, and it is a sewage denitrification process widely used in various large and medium-sized sewage treatment plants. Among them, A refers to the anoxic section, which mainly serves the denitrification process of nitrogen, and O refers to the aerobic section, which is the main place for the degradation of organic matter and the nitrogen nitrification process. The A / O process has the advantages of strong impact load resistance, good removal of organic pollutants and good denitrification performance. In order to make full use of the carbon source in the influent to participate ...

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Problems solved by technology

[0005] The present invention aims at the above-mentioned problems existing in the existing A / O method sewage treatment process and tidal flow constructed wetland technology, and provides a method capable of realizing the high-precision autonomous operation of the tidal flow constructed wetland, and strengthening the subsequent denitrification of nitrate nitrogen in the A / O method A new tidal flow artificial wetland device that further degrades organic pollutants and significantly improves the water quality of the A / O method

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