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A method for synchronous reclaimed water resource recovery and a rain garden system

A rain garden and recycling technology, applied in the field of water resources utilization, can solve problems such as limited heavy metal removal capacity, soil infiltration, and insufficient organic carbon sources for biological denitrification, so as to avoid waste of water resources, reduce construction scale, and improve Effect of Stormwater Treatment Load

Active Publication Date: 2020-12-29
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The rain garden is an ecological purification technology, but the rain garden system still has the following technical bottlenecks in the treatment of rainwater and reclaimed water: ① The temporal and spatial distribution of urban rainwater quality and quantity is complex, which causes a large impact load on the rain garden system, causing the system The water quality of the effluent is unstable; ②The water permeability of the surface soil of the rain garden system is low, and the erosion of the rainwater causes the soil to infiltrate, which may easily cause the blockage of the wetland system; The system is paralyzed; ④ Urban rainwater carries a large amount of heavy metals, while the ordinary rain garden system has limited ability to remove heavy metals; ⑤ The nitrogen concentration in the middle water is still high, but the BOD concentration is low, and the organic carbon source required for biological denitrification is insufficient , making it difficult for the rain garden system to achieve deep denitrification of reclaimed water
[0009] Therefore, there is still no report of a rain garden system that can adapt to the temporal and spatial distribution characteristics of urban rainwater, has high load, low temperature resistance, and can integrate into urban ecological landscape while realizing deep resource treatment of rainwater and reclaimed water.

Method used

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  • A method for synchronous reclaimed water resource recovery and a rain garden system
  • A method for synchronous reclaimed water resource recovery and a rain garden system
  • A method for synchronous reclaimed water resource recovery and a rain garden system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Embodiment 1: as figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9 As shown, a rain garden system for reclaimed water synchronous resource treatment mainly includes a sump 1, an enhanced artificial filter bed system 2, an outlet pool 3, an equipment well 4, multiple functional flower beds 5, multiple functional lawns 6, Rainwater collection pipeline 7-1 and reuse pipeline 7-2, water collection tank 1, reinforced artificial filter bed system 2, outlet pool 3, equipment well 4, multiple functional flower beds 5, and multiple functional lawns 6 are all composed of Concrete, steel plate, steel mix or brick mix.

[0048] The enhanced artificial filter bed system 1, multiple functional flower beds 5 and multiple functional lawns 6 are all set as important components of the functional rain garden landscape, and at the same time have the function of water treatment, as a function of rainwater and reclaimed water re...

Embodiment 2

[0085] Embodiment 2: In this embodiment, the total area of ​​the functional rain garden established in a college is about 500m 2 , the total area of ​​the enhanced artificial filter bed treatment system is 15m 2 , the design rainwater source is the roof rainwater of the building complex and regional ground runoff, and the catchment area is about 2500m 2 , the annual rainfall / snow is about 2000m 3 . The source of reclaimed water in this system design is the effluent of the domestic sewage treatment system of the teaching building, and the reclaimed water volume is about 6m 3 / d. The functional rain garden is designed to handle 18m of rainwater in the warm season 3 / d, the designed warm season rainwater treatment load is 1.2m 3 / m 2 ·d; the design water treatment capacity in cold season (daily average temperature above 5°C) is 12m 3 / d, the design rain / snow water treatment load is 0.8m 3 / m 2 d.

[0086] Operation effect: During the operation, the removal rates of orga...

Embodiment 3

[0088]Embodiment 3: In this embodiment, the total area of ​​the functional rain garden established in a college is about 400m 2 , the total area of ​​the enhanced artificial filter bed treatment system is 20m 2 , the system feed water is rainwater and research center water. The functional rain garden is designed to handle 24m of rainwater in the warm season (the average daily temperature is above 5°C). 3 / d, the designed warm season rainwater treatment load is 1.2m 3 / m 2 ·d; the design water treatment capacity in cold season (daily average temperature above 5°C) is 18m 3 / d, the design rainwater treatment load is 0.8m 3 / m 2 d, the treatment capacity of reclaimed water (meeting the standard above grade B in the "Integrated Wastewater Discharge Standard" (GB 8978-1996)) is 9-12m 3 / d.

[0089] Operation effect: The effluent water quality of the rain garden system is better than the Class III water quality standard in the "Surface Water Environmental Quality Standard" (G...

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Abstract

The invention provides a method and a rainwater garden system for synchronous resourceful treatment of reclaimed water and belongs to the technical field of water resource utilization. Collection, treatment and recycling of rainwater and the reclaimed water are integrated into flower beds, lawns and landscape gardens of constructed wetlands, and non-point and point source pollution of cities is solved. An artificial filter bed system of the rainwater garden is subjected to cold-resistant enhancement treatment by cold-resistant vegetation, thermal insulation, potential level water distributionand aeration; pollutants in the rainwater and the reclaimed water are rapidly and efficiently degraded by iron-substrate biological particle carriers. The system is suitable for rapid resourceful treatment of the rainwater and the reclaimed water at different temperatures in different regions and different seasons. Quality of effluent of the system meets water quality requirements of surface watersources of greening and domestic drinking water, so that not only is water resource saved, but also the black-odor problem caused by long-term storage of the rainwater in the sponge city developmentprocess is solved, and production of a black and odorous water body can be effectively prevented. Industrialization can be realized, and the method and the system have good market prospect and promotional value.

Description

technical field [0001] The invention relates to a method for synchronously recycling reclaimed water and a rain garden system, belonging to the technical field of water resources utilization. Background technique [0002] With the acceleration of urbanization in my country, the natural permeability and roughness of the urban surface continue to decrease, resulting in a significant reduction in the amount of infiltrated rainwater, resulting in the vast majority of urban rainfall that can only be discharged through surface runoff, resulting in continuous urban surface runoff. In recent years, some large and super-large cities in my country have frequently experienced the phenomenon of "seeing the sea". Large areas of urban waterlogging have caused serious impacts on urban construction, development and people's lives. [0003] At the same time, urbanization is accompanied by the continuous concentration of population, which increases the emission intensity of urban life and ind...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/32C02F3/34A01G31/00A01G31/02E03F5/10E03F5/22C02F101/20C02F101/22C02F101/30
CPCA01G31/00A01G31/02C02F3/32C02F3/34C02F2003/001C02F2101/20C02F2101/203C02F2101/22C02F2101/30C02F2305/06E03F5/10E03F5/106E03F5/22Y02P60/21
Inventor 李德生邓时海姚宏
Owner BEIJING JIAOTONG UNIV
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