Constructed wetland system

Abstract

The invention belongs to an artificial wetland and particularly relates to an artificial wetland system. The artificial wetland system comprises a water inlet pipeline, aeration devices, wetland units, a water outlet pipeline, multifunctional regions and a pre-treatment region, wherein the aeration devices are arranged in the multifunctional regions; the wetland units and the multifunctional regions are distributed at intervals in a transverse direction; the wetland units and the adjacent multifunctional regions are communicated through water holes; the water inlet pipeline is connected with the input of the pre-treatment region and the output of the pre-treatment region is connected with the inputs of the multifunctional regions respectively through water pipes and valves; a filler is arranged between the input end and the output end of the pre-treatment region; a washing device is arranged between the filler and the input end of the pre-treatment region; the outputs of the wetland units are connected with a next treatment unit through a water collection pipe and the water outlet pipeline or are recycled. According to the artificial wetland system provided by the invention, the problems of high frequency of blockage, poor self-recovery capability and the like of a wetland system in the prior art are solved; the artificial wetland system provided by the invention has the advantages of low frequency of blockage, good pollutant removing effect, strong self-recovery capability and the like.

Description

technical field [0001] The invention belongs to a constructed wetland, in particular to a constructed wetland system. Background technique [0002] Constructed wetland technology is a sewage treatment process developed in recent years. Due to its characteristics of low investment, low energy consumption, and low treatment cost, it has gradually been widely accepted. Constructed wetland is an artificially constructed complex ecosystem, and its various parts interact to remove pollutants through the comprehensive action of plants, substrates and microorganisms. In actual operation, after the constructed wetland operates for a long time, the system is prone to blockage, the function of the wetland is reduced, the purification ability of pollutants is reduced, and the effluent cannot be discharged up to the standard. The main reasons are: [0003] 1. Sewage enters the wetland system directly without pretreatment, resulting in the gradual accumulation of a large amount of suspe...

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Problems solved by technology

[0003] 1. Sewage enters the wetland system without pretreatment and enters directly, resulting in the gradual accumulation of a large amount of suspended matter

[0004] 2. The dissolved oxygen in the wetland system is low, resulting in a decrease in the removal rate of pollutants, causing organic matter and suspended solids in the sewage to stay and accumulate in the wetland system

[0005] 3. The self-recovery performance of the system is poor. After a long time of operation, the wetland matrix is ​​saturated with adsorption, and with the accumulation of pollutants, the operation function declines

The problems in this patent application are: on the one hand, the incoming water has not been pretreated; on the other hand, the water inlet pipe and the aeration pipe are located at the bottom of the wetland

With the operation of the constructed wetland, it is extremely prone to blockage, it is difficult to ensure that the effluent discharges up to the standard, and it is inconvenient to maintain and the operating cost is high

In addition, the problem of poor self-recovery performance of the wetland system has not been fundamentally solved, the matrix is ​​saturated, pollutants accumulate, blockage occurs, system operation function declines, and effluent water is not up to standard

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