Method of treating sewage by composite vertical down flow artificial wet field and treatment system thereof

Abstract

The invention discloses a sewage treatment method of composite vertical letdown stream artificial wetland, sewage is processed through two-stage serial vertical letdown stream artificial wetland in the method, the two-stage vertical letdown stream artificial wetland comprises a bed, E-shape structure water distribution pipe and processing medium, internal carbon source waste pipe distributed at the bottom of a first stage vertical letdown stream artificial wetland, sewage enter uniformly into the bottom of the first stage vertical letdown stream artificial wetland from the top thereof via the E-shape structure water distribution pipe, then the processed sewage mixed with internal carbon source sewage is processed in the second stage vertical letdown stream artificial wetland. The invention has advantages of low processing cost, small accommodation area and good denitrification dephosphorization effect.

Description

technical field

[0001] The invention belongs to the field of sewage treatment, and in particular relates to a method for treating sewage in a composite vertical downflow artificial wetland and a treatment system thereof. Background technique

[0002] At present, the sewage complex vertical flow artificial wetland treatment method is mainly the combination of downflow and upflow. It is composed of a descending pool and an ascending pool. There is a partition wall in the middle of the two pools, and the bottom is connected. In the center of the surface of the descending pool is a perforated water distribution pipe with small holes drilled in the lower half, so that the water inflow can be evenly distributed to the surface of the wetland. The water in the upward pool, the upward pool uses the "H" type pipeline collection system to discharge the water. Both the downstream and upstream ponds are filled with sand and gravel of a certain size as the tr...

Images