Surface flow-vertical subsurface flow artificial wetland treatment process

Abstract

The invention discloses a surface flow-vertical subsurface flow artificial wetland treatment process, and belongs to the technical field of environmental protection. The construction of the artificialwetland comprises the following steps: 1) selecting seedlings of artificial wetland plant species, firstly putting the seedlings into water to be cultured, then transferring the seedlings to NO3 <->/NH4 <+> nutrient solutions with different concentrations to be cultured, and screening out plants partial to NH4 < + > and plants partial to NO3 <->; 2) planting the plants partial to NH4 < + > screened in the step 1) into a surface flow artificial wetland, and planting the plants partial to the NO3 <-> screened in the step 1) into a vertical subsurface flow artificial wetland; and 3) connecting the surface flow artificial wetland and the vertical subsurface flow artificial wetland constructed in the step 2) in series, the surface flow artificial wetland is arranged at the water inlet end of the system, and the vertical subsurface flow artificial wetland is arranged at the water outlet end of the system. According to the method, directional screening is carried out on the plants accordingto the oxygen dissolving characteristics and the structure of the artificial wetlands, and the sewage comprehensive treatment efficiency and the ammonia nitrogen removal efficiency are both obvious.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and more specifically relates to a surface flow-vertical subsurface flow artificial wetland treatment process. Background technique [0002] The constructed wetland sewage treatment system developed in the past ten years is a kind of ecological engineering technology specially constructed for sewage treatment by simulating the physical, chemical and biological effects in the natural wetland ecosystem, and has important ecological service functions. Constructed wetlands can take advantage of the physical, chemical, and biological triple coordination of the substrate-microbe-plant complex ecosystem to achieve efficient purification of wastewater through filtration, adsorption, precipitation, ion exchange, plant absorption, and microbial decomposition. The biogeochemical cycle of matter and water promotes the growth and yield of green plants, [0003] At present, there are hundreds...

AI Technical Summary

Problems solved by technology

The composite constructed wetland system of this application adds ventilation pipes and aeration heads at the bottom of the surface flow constructed wetland mechanism to improve the effect of dissolved oxygen and promote the nitrification reaction of nitrifying bacteria in the wetland system. However, the surface flow constructed wetland water flows on the surface It flows horizontally, and it is difficult to completely improve the dissolved oxygen effect of surface flow constructed wetlands only by adding ventilation and aeration devices, and adding aeration devices will increase additional treatment costs

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