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Efficient anti-blockage biological retention system

A bioretention and anti-clogging technology, applied in biological treatment devices, biological water/sewage treatment, water treatment parameter control, etc. The soil is prone to blockage and other problems, so as to achieve the effect of water retention capacity, non-toxic and tasteless, improved removal capacity, and improved percolation capacity.

Inactive Publication Date: 2018-09-21
GUANGZHOU EP ENVIROMENTAL ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the randomness and complexity of runoff water quality and water volume changes, the existing bioretention facilities have a large fluctuation range in the removal rate of pollutants in runoff rainwater, and the removal effect of nitrogen and phosphorus in runoff is not ideal, and the filling soil is easy Blockage occurs and the infiltration effect decreases, which restricts the use time of the facility, and the soil needs to be replaced after a short period of use

Method used

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  • Efficient anti-blockage biological retention system
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Examples

Experimental program
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Effect test

preparation example Construction

[0029] 2. Preparation of biological ceramsite

[0030] (1) Preparation of biological ceramsite shell:

[0031] S1. adopt municipal dry sludge, ferric chloride, fly ash and clay to mix to obtain powder, ferric chloride is 1.0% of municipal dry sludge weight, fly ash is 120% of municipal dry sludge weight, The clay is 50% of the weight of the municipal dry sludge, and the particle size of the powder is less than or equal to 0.09mm; the polystyrene foam particles are used as the template, the polystyrene foam is a sphere, and the particle size of the template is 2-8mm; the water content of the municipal dry sludge The rate is 7.0-9.0%;

[0032] S2. dipping a layer of carboxymethyl cellulose solution with a mass concentration of 1.2% on the template;

[0033] S3. Then put the template of S2. into the powder, so that the surface is covered with a layer of powder with a thickness of 0.3-0.5mm;

[0034] S4. Then put the template of S3. into the ball forming tray, and add powder, d...

Embodiment 1

[0044] A high-efficiency anti-clogging bioretention system, such as figure 1As shown, from top to bottom are planting soil layer 1, first permeable geotextile layer 2, filler layer 3, second permeable geotextile layer 4 and drainage layer 5, with geotextile 6 around and bottom, and filler layer 3 Composed of a filler matrix and biological ceramsite, the biological ceramsite includes a hollow biological ceramsite shell and sodium polyacrylate superabsorbent resin filled in the biological ceramsite shell. In this embodiment, the thickness of the filler layer 3 is 800 mm. The filler layer is formed by mixing the filler matrix and biological ceramsite evenly. The shell of the biological ceramsite is provided with two openings. The filling rate of the sodium polyacrylate superabsorbent resin in the ceramsite is is 10%, and the mass of biological ceramsite is 1.0% of the mass of the filler matrix. The drainage layer 5 is a gravel layer, the thickness of the gravel layer is 250mm, a...

Embodiment 2～6

[0046] A high-efficiency anti-clogging bioretention system is basically the same as in Example 1, and the specific parameters are shown in Table 1.

[0047]

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Abstract

The invention discloses an efficient anti-blockage biological retention system. The biological retention system comprises a soil planting layer, a first water permeable geotechnical cloth layer, a packing layer, a second water permeable geotechnical cloth layer and a drainage layer which are sequentially arranged from top to bottom. Geotechnical cloths are arranged at the periphery and the bottom,the packing layer includes a packing matrix and biological ceramsite, the biological ceramsite includes hollow biological ceramsite shells and sodium polyacrylate super absorbent resin with which thebiological ceramsite shells are filled, and the biological ceramsite shells are provided with openings. According to the efficient anti-blockage biological retention ystem, due to the fact that the biological ceramsite shells and the sodium polyacrylate super absorbent resin with which the biological ceramsite shells are filled form the biological ceramsite, the biological ceramsite can ensure the rainwater retention time, the removal capability for nitrogen and phosphorus of the packing layer is improved, meanwhile the enough water permeability and the filtration performance of the packing layer are ensured, the packing layer is effectively prevented from being blocked, the rainwater filtration capability of the biological retention system is improved, and the biological retention systemis not likely to be blocked while rainwater is sufficiently treated.

Description

technical field [0001] The invention relates to the technical field of sponge city rainwater treatment, and more specifically, relates to a high-efficiency anti-clogging bioretention system. Background technique [0002] Bioretention facilities are an emerging low-impact development in-situ runoff rainwater control facility. They have good runoff pollution control effects, runoff volume reduction results, and peak flow control effects. They are economical and applicable, and can be widely used in urban greening. However, due to the randomness and complexity of runoff water quality and water volume changes, the removal rate of existing bioretention facilities for pollutants in runoff rainwater fluctuates widely, and the removal effect of nitrogen and phosphorus in runoff is not ideal, and the filling soil is easy to Blockage occurs, and the infiltration effect decreases, which restricts the service life of the facility, and the soil needs to be replaced after a short period o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
CPCC02F1/001C02F3/308C02F3/32C02F3/34C02F9/00C02F2103/001C02F2203/006C02F2209/08C02F2209/14C02F2209/16
Inventor 王文静阳重阳曹姝文李锐敬刘小平许嘉辉谢永新
Owner GUANGZHOU EP ENVIROMENTAL ENG