Nitrogen and phosphorus removal composite filler artificial wetland and sewage treatment method

Abstract

The invention relates to the technical field of sewage treatment, in particular to a nitrogen and phosphorus removal composite filler artificial wetland and a sewage treatment method. The artificial wetland comprises an adjusting tank, a vertical flow artificial wetland and a horizontal subsurface flow artificial wetland which are sequentially arranged along a water flow direction, the adjusting tank comprises a water storage tank and a water distribution tank, the water distribution tank is used for adjusting water outlet amount and flow speed of the water storage tank, the water inlet end ofthe water distribution tank is communicated with a water outlet of the water storage tank, a water inlet of the vertical flow artificial wetland is communicated with the water outlet end of the waterdistribution tank, a water outlet of the vertical flow artificial wetland is communicated with the water inlet end of a water distribution channel, the water outlet end of the water distribution channel is communicated with the water inlet end of the horizontal subsurface flow artificial wetland, the water outlet end of the water distribution channel is higher than the water inlet end of the water distribution channel, and a broken stone filler layer, a slow-release carbon source filler layer and an aluminum sludge filler layer are sequentially laid on the vertical flow artificial wetland from bottom to top. The artificial wetland effectively solves the problems of insufficient microbial denitrification process carbon source and poor phosphorus adsorption effect of a base material in theartificial wetland, the problem of blocking of the base material of the artificial wetland is relieved, and nitrogen and phosphorus removal effects are enhanced.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a composite filler artificial wetland for nitrogen and phosphorus removal and a sewage treatment method. Background technique [0002] The excessive input of nitrogen and phosphorus in the current lake basin has become one of the main reasons for the lake water environment problems. In recent years, with the improvement of sewage treatment technology and efficiency of urban sewage treatment plants, the sewage has reached the national discharge standard, but the water quality of these sewage is still several times higher than the surface water quality standard, and the amount of sewage water is huge, directly discharged to the lake and other natural water bodies pose a huge threat. [0003] Constructed wetlands are widely used due to their advantages such as stable effluent quality, low energy consumption, and convenient maintenance and management. The purification of w...

AI Technical Summary

Problems solved by technology

[0004] This application provides a composite filler constructed wetland and sewage treatment method for denitrification and phosphorus removal, which can effectively solve the problems of insufficient carbon source in the microbial denitrification process and poor phosphorus adsorption effect of the substrate in the constructed wetland, alleviate the problem of substrate clogging in the constructed wetland, and strengthen denitrification. Nitrogen and phosphorus removal effect

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