Micro-aeration vertical flow wetland sewage purification technology

Abstract

The invention relates to a technology for purifying wastewater in micro-aeration vertical flow wetlands, and belongs to the water pollution control field. The technology adds a manual micro-aeration system in the conventional upwelling vertical downward flow wetlands, and adds channels for washing pipelines and outputting sediments at the bottom part of the wetland system, thereby improving the treatment capacity of the wetland system, having the functions of backwashing and sediment outputting, and prolonging the service life of the wetland. The technology can be independently utilized, and can also be combined with other wetlands by serving as an aerobic unit. The technology can be applied to the domestic sewage processing of villages, small towns and scenic spots, the wastewater treatment of a municipal sewage mixed stream entering a lake and the deep purification of tail water of a sewage treatment plant.

Description

(1) Technical field [0001] This technology belongs to the field of water pollution control, and the artificial wetland sewage purification system. It can be applied to the treatment of domestic sewage in villages, towns and tourist attractions, as well as the sewage treatment of rivers entering lakes mixed with urban domestic sewage, as well as the deep purification of the tail water of sewage treatment plants. (2) Background technology [0002] Constructed wetlands, as a technology for water pollution control, have been widely used and developed around the world since they originated in Europe in the 1960s. A water pollution control process that combines wetlands and surface flow wetlands as the main body and combines multiple layout methods. But like other purification processes, the advantages of constructed wetland technology are obvious, but the disadvantages are also prominent. While everyone is attracted by its advantages such as low investment and operation costs, ...

AI Technical Summary

Problems solved by technology

[0003] How can we improve the treatment capacity and purification effect of the wetland system, and prolong its service life? Many researchers have found that the low oxygen utilization rate is the main reason for the low purification efficiency of constructed wetlands. Under anoxic conditions, organisms cannot perform normal aerobic respiration, and the concentration of certain elements and organic substances in the reduced state can reach toxic levels.

The lower oxygen concentration leads to a decrease in the oxidation and decomposition rate of organic matter in the wetland system, and the nitrification reaction is not complete, which limits the removal of nitrogen in the wetland system [5-6] , and the blockage of the wetland system is mostly caused by the retention and accumulation of suspended solids and organic matter in the sewage system in the wetland system [7-8]

The bottom deposits are most prominent and difficult to remove

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