Fabricated revetment type aerobic/anoxic/aerobic artificial wetland system and application thereof

Abstract

The invention belongs to the field of sewage treatment, and particularly relates to an assembled revetment type aerobic / anoxic / aerobic artificial wetland system and application thereof. Water quality improvement treatment is carried out on sewage through three-stage stepped reaction zones which are aerobic, anoxic and aerobic in sequence, water flow in the aerobic zone enters the anoxic zone upwards from the bottom of the aerobic zone for continuous reaction, and due to the fact that dissolved oxygen in the sewage is low, the water flow direction, the structure and the like in the anoxic zone form a second-stage anoxic state; effluent of the anoxic zone overflows from the top and enters the third-stage aerobic zone from top to bottom, so that the whole system always presents an 'aerobic-anoxic-aerobic' alternate treatment mode, and compared with a traditional constructed wetland, the occupied area is greatly saved, and the system has the advantages that the traditional constructed wetland is simple to operate and manage and the like; the biological treatment process in the constructed wetland is enhanced by the three-stage treatment process, the nitrogen and phosphorus removal effect is improved by a functional filler, the water quality is remarkably improved, and the effluent quality reaches the standard.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and more specifically relates to an assembled revetment type aerobic / anoxic / aerobic constructed wetland system and its application. Background technique [0002] Constructed wetland sewage treatment system, as a sewage ecological treatment process with low construction and operation costs, simple operation and management, and easy maintenance, has been widely used in the process of further improving water quality in small sewage treatment, initial rainwater surface runoff, and tail water of sewage plants. . However, traditional constructed wetlands are generally built as gabions or green natural pavements. On the one hand, they occupy a large area; Therefore, it is generally used to treat tail water of sewage treatment plants with low pollutant concentration. On the other hand, traditional constructed wetlands have low removal efficiency for organic matter and nitrogen and phosphorus, and have ve...

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Problems solved by technology

[0005] Aiming at the defects of the prior art, the purpose of the present invention is to provide a prefabricated revetment-type constructed wetland system with a small footprint and capable of significantly improving water quality and its application, aiming to solve the problem of the large footprint of the prior art constructed wetland system. , Technical problems of poor sewage water quality improvement

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