Saline-alkali soil drainage, storage, purifying, and recycling system based on sponge city

Abstract

The invention discloses a saline-alkali soil drainage, storage, purifying, and recycling system based on a sponge city, comprising a purifying water storage channel, a saline-alkali water purifying pond, and a biological filtering pond; the purifying water storage channel comprises a channel body, wherein the top part of the channel body is provided with a slope, and slope plants are planted on the slope; the channel body is internally and orderly provided with a zeolite filler layer, a geotechnical cloth, a planting soil layer and a salt excretion plant; the bottom part of the zeolite filler layer is paved with a water collecting pipe; the saline-alkali water purifying plants are planted in the saline-alkali water purifying pond, and a plant floating block is arranged in the saline-alkali water purifying pond, and the bottom part of the plant floating block is provided with a mesh bag; the top part of the biological filtering pond is provided with a mixer with a cover, and a biological filler is arranged in the filler biological filtering pond. According to the invention, the concept of sponge city is infused to a water circle of the land around the city, the rainwater storage, purification and use of saline-alkali land is contained in the water cycle of the whole sponge city, thus the system is good for constructing a more comprehensive urban sponge body, and providing a new concept for governing the geological pollution of people.

Description

technical field [0001] The invention belongs to the field of sewage treatment systems, and in particular relates to the purification treatment and recycling of saline-alkali water and nutrient-rich water bodies, in particular to a saline-alkali land drainage retention, purification and recycling system based on sponge cities. Background technique [0002] Saline-alkali soil refers to saline soil, alkaline soil and various salinized and alkalized soils. It will seriously harm the growth of crops, make a large area of ​​land resources unusable, and reduce the comprehensive agricultural production capacity. There is a large area of ​​saline-alkali land in our country, and strengthening the prevention and improvement of saline-alkali land is an important way to improve the development of our country's agriculture. The drainage mode of traditional planting saline-alkali land is that the leaching water (including artificial irrigation water and rainwater) of saline-alkali land di...

AI Technical Summary

Problems solved by technology

At present, most of the installations and facilities used in the construction of sponge cities are small-scale installations concentrated in residential areas inside the city, such as permeable roads, water storage roofs, water storage gardens, etc. There are few facilities for storage and purification and reuse

At the same time, in recent years, sunken green land and permeable roads have developed rapidly, but their applications are still very narrow, and the filler is relatively simple. Although the water seepage capacity is strong, it is difficult to purify rainwater, and the rainwater it collects often only passes through the land. , The initial filtration of the filler, the water body is still polluted initial rainwater, which leads to the restriction of the reuse of the water body, and the flow into rivers and lakes will also cause eutrophication pollution

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