System for carrying out collection, purification and utilization on rainwater on road surfaces

Abstract

The invention provides a system for carrying out collection, purification and utilization on rainwater on road surfaces, and the system comprises a groove and one or more packing units arranged in the groove, wherein the two sides of each packing unit are respectively provided with a baffle, a ventilation well is formed between two baffles arranged at the head end and tail end of two adjacent packing units, and a ventilation well is formed among the baffles at the two ends of the groove and the inner side wall of the groove; the bottom surface of each packing unit is provided with a concrete grating, a water collecting sump is formed between the concrete grating and the internal bottom surface of the groove, and the water collecting sump is mutually communicated with all the ventilation wells; and the packing unit on the concrete grating is composed of a cobble layer, a gravel layer, a matrix layer and a planting soil layer which are sequentially arranged from bottom to top, and plants are planted in the planting soil layer. Rainwater which is purified by the system disclosed by the invention can satisfy the needs of agricultural water and general landscape water.

Description

technical field [0001] The invention belongs to the technical field of rainwater collection, storage, purification and utilization, and in particular relates to a road surface rainwater storage, purification and utilization system. Background technique [0002] Water resources are very important and special natural resources, the basic material that human beings rely on for survival and the restrictive factor of human sustainable development. As the world's population expands, water scarcity has become a global threat. my country is a developing country with poor water resources, with a per capita water volume of 2400-2500 m 3 / a, which is a quarter of the world's per capita share. At the same time, my country is also facing serious water pollution problems. There are two main types of water pollution: point source pollution (Point Source Pollution) and non-point source pollution (Non-point Source Pollution). Non-point source pollution mainly refers to the water pollution...

AI Technical Summary

Problems solved by technology

[0006] The shortcomings are: (1) The horizontal flow artificial wetland treatment bed has shortcomings such as insufficient aerobic conditions, although it can remove SS well and some BOD

(2) The vertical flow constructed wetland treatment bed has a strong treatment capacity and nitrification capacity for oxygen-consuming organic matter in wastewater. 5 The removal effect of COD and COD is better, but the removal effect of SS is worse than that of horizontal flow artificial wetland, and it is very prone to clogging; although it has a strong nitrification ability for wastewater, its denitrification ability is also better than that of horizontal flow artificial wetland. The wetland is poor, so the two treatment processes of nitrification and denitrification of wastewater cannot be completed independently to achieve the purpose of wastewater denitrification treatment

(3) Both the vertical flow constructed wetland treatment bed and the horizontal flow constructed wetland treatment bed have poor phosphorus removal capabilities in raw water (<30-40%), and the currently widely used sand, gravel and other substrates have poor phosphorus removal capabilities. The service life of adsorption saturation is relatively short, generally 2-3 years: even if the horizontal flow constructed wetland and the vertical flow constructed wetland are connected in series to form a composite system, if sand and gravel substrates are still used, the removal rate of phosphorus is still less than 60%

(4) The current artificial wetland treatment beds are generally closed round or square, occupy a large area, and need a large area of ​​open space to complete the construction of artificial wetlands. The construction conditions are limited and cannot be widely used

(5) At present, most of the plants used in constructed wetlands are annual shrubs or herbaceous plants. The treatment effect in summer is ideal, but when the plants wither in winter, it will not only affect the treatment effect, but also affect the appearance

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