Artificial wetlands system for purifying roof rainwater containing washing wastewater

Abstract

The invention discloses an artificial wetlands system for purifying roof rainwater containing washing wastewater. The artificial wetlands system comprises a rain and sewage diversion well, a water distributor, a wetland treatment area, a collector pipe and a flood discharge ditch which are connected in sequence, wherein a diverter valve is arranged in the rain and sewage diversion well; the water outlet of the rain and sewage diversion well is connected with the flood discharge ditch and the water distributor; the water distributor is arranged above the wetland treatment area; the collector pipe is arranged at the bottom of the wetland treatment area; and the wetland treatment area is composed of vertical filter layers. When rainstorm flowing into the rain and sewage diversion well has a high water level, the diverter valve is opened, and rainwater is discharged into the flood discharge ditch; when washing wastewater flowing into the rain and sewage diversion well has a low water level, the diverter valve is closed, and the washing wastewater enters the water distributor through the rain and sewage diversion well; and the washing wastewater vertically flows into the wetland treatment area through the water distributor, is separated and purified by the vertical filter layers in the wetland treatment area and then is collected by the collector pipe to gather in the flood discharge ditch so as to be discharged. The washing wastewater is subjected to proper treatment and then enters a rainwater pipe network system or is discharged into a river, so that pollution of the river is avoided.

Description

technical field [0001] The invention belongs to a sewage treatment device, in particular to an artificial wetland system for purifying roof rainwater containing laundry wastewater. Background technique [0002] With the advancement of urbanization, the drainage problem of building roofs has become increasingly prominent, and it is imminent to divert rain and sewage. However, in residential buildings, washing machines are often placed on balconies. Since there are no sewage pipes on the balcony, the laundry wastewater is often discharged into the rainwater pipe outside the roof, mixed with the rainwater on the roof of the building, and then directly discharged into the receiving water body. Since the laundry wastewater contains surfactants, nitrogen, phosphorus and other pollutants, it will inevitably affect the water quality in the rainwater pipes, and then pollute the water quality of the river. The application of the vertical flow constructed wetland system to the separa...

AI Technical Summary

Problems solved by technology

Since the laundry wastewater contains surfactants, nitrogen, phosphorus and other pollutants, it will inevitably affect the water quality in the rainwater pipes, thereby polluting the water quality of the river.

There is no patent literature report on the application of vertical flow artificial wetland system to the separation and purification of rainwater on building roofs containing laundry wastewater

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