Rainwater resource utilization system of composite type medium and rainwater ecological purifying method of system

Abstract

The invention provides a rainwater resource utilization system of a composite type medium and a rainwater ecological purifying method of the system, and relates to the technical field of water body purification, aiming at solving the technical problem of ecological purification of rainwater. The system comprises a reservoir, a clean-water reservoir, a control well, a sand sediment trap and a medium composite type constructed wetland, wherein a plurality of water distributing pipes are paved on the medium composite type constructed wetland, and a plurality of water collecting pipes are paved at the bottom of the medium composite type constructed wetland; the reservoir and the clean-water reservoir jointly take the same vertical wall as a side pool wall, and the upper part of the vertical wall is provided with a clean water overflowing opening; the upper part of the wall of the reservoir is provided with an accumulated water overflowing opening, and the bottom of the reservoir is provided with a rainwater lifting pump; the sand sediment trap is arranged at a low-lying place which is good for collecting the rainwater, and is connected to the reservoir by a through hole; the rainwater lifting pump is connected with each water distributing pipe; the water inlet of the control well is connected to each water collecting pipe, and the water outlet of the control well is connected to the clean-water reservoir; and the bottom of the clean-water reservoir is provided with a clean water lifting pump. By using the system and the method provided by the invention, the utilization ratio of rainwater resources is high.

Description

technical field [0001] The invention relates to water body purification technology, in particular to a composite medium rainwater resource utilization system and its rainwater ecological purification method. Background technique [0002] Rainwater purification and utilization is a new type of comprehensive technology. In addition to achieving the purpose of effectively utilizing non-traditional water resources and saving water, from the perspective of maintaining a benign water circulation system, efficient rainwater purification and utilization technology is more helpful. To achieve a series of complex environmental protection goals such as pollutant control, rational allocation of water resources, and improvement of the ecological environment. [0003] The quality of rainwater is more complicated, and differences in regions, catchment surfaces, seasons, rainfall characteristics, etc. will lead to differences in water quality. Firstly, due to the influence of air pollution...

AI Technical Summary

Problems solved by technology

[0004] Most of the existing rainwater utilization technologies are simple physical purification, and its main process from front to back is: water collection, screening, sedimentation, sand filtration, retention tank, treatment tank (water supply tank); this simple physical purification cannot solve the problem of rainwater Improvement of water quality after blackening and odor during storage period

In addition, considering the poor quality of initial rainwater and the low removal rate of pollutants in rainwater by the technology itself, most rainwater harvesting and utilization technologies discard a large amount of initial rainwater. In seasons and areas with low rainfall, the actual amount of rainwater collected is greatly reduced. , which further increases the limitations of rainwater utilization

Of course, there is also a method to improve the quality of rainwater by adding chemicals, but the problem of chemical residues in the effluent of this method is inevitable, which can easily lead to secondary pollution of the water environment

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