Biofilter

Abstract

The invention discloses a biofilter. The biofilter comprises a filtering basin, wherein a water inlet and a water outlet are formed in the side walls of the filtering basin, a porous medium filtering layer is arranged at the bottom of the filtering basin, a biological dielectric layer is arranged at the top of the porous medium filtering layer, a rainwater collecting pipe is embedded in the porous medium filtering layer, a plurality of rainwater inlets are formed in the wall of the rainwater collecting pipe, one end of the rainwater collecting pipe is connected with a cleaning pipe, and the other end is connected with a draining pipe which is connected with the water outlet; a cover plate is arranged at the top of the filtering basin, and a biological dielectric layer plant seed inlet is formed in the cover plate. According to the biofilter, the structures such as the biological dielectric layer, the porous medium filtering layer and the like are used for purify rainwater, pollutants such as particulate matters, nitrogen, phosphorus, heavy metal, grease and the like in the rainwater are removed effectively, the purified rainwater can penetrate into the underground and be drained into natural water or be recycled; the biofilter further has an environment beautifying function and can operate automatically without external energy.

Description

technical field [0001] The invention relates to rainwater treatment equipment, in particular to a biological filter. Background technique [0002] With the acceleration of the urbanization process, the impermeable area on the ground has increased significantly, and pollutants have gradually accumulated on these impermeable ground. Pollution is a kind of diffuse pollution, and then enters the natural water body, causing water pollution. The pollutants include particulate matter, organic matter, heavy metals and other toxic and harmful substances. Therefore, the process of urbanization and industrialization has led to increasingly serious water crisis and rain and flood hazards. [0003] With the aggravation of water source crisis and rain and flood damage, it has become an important emerging topic to collect and utilize rainwater as water resources for comprehensive management. In terms of urban overall planning, most of the combined drainage systems used in the past have b...

AI Technical Summary

Problems solved by technology

[0004] At present, the collection and treatment of initial rainwater in my country is still in its infancy. The collection of initial rainwater is only to prevent it from being discharged into the water body to pollute the water quality. The purification treatment and reuse of initial rainwater are rarely considered, and most of them are directly discharged into municipal domestic sewage pipes. network

The concentration of pollutants contained in the initial rainwater is relatively high, especially the initial rainwater on the road. Direct discharge into the domestic sewage pipe network will bring a greater load to the sewage plant

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