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Filler for high-efficiency anti-clogging bioretention system

A bioretention and anti-clogging technology, applied in biological water/sewage treatment, granular microbial carrier treatment, water pollutants, etc. Filling soil is prone to blockage and other problems, so as to achieve the effects of water retention capacity, non-toxic and tasteless, improved removal capacity, and improved percolation capacity.

Active Publication Date: 2018-06-26
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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  • Filler for high-efficiency anti-clogging bioretention system

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0019] The preparation method of biological ceramsite is as follows:

[0020] (1) Preparation of biological ceramsite shell:

[0021] S1. Use municipal dry sludge, ferric chloride, fly ash and clay to mix to obtain powder, ferric chloride is 1.0% of the weight of municipal dry sludge, and fly ash is 120% of the weight of municipal dry sludge. 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 8.0%;

[0022] S2. dipping a layer of carboxymethyl cellulose solution with a mass concentration of 1.2% on the template;

[0023] 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;

[0024] S4. Then put the template of S3. into the b...

Embodiment 1~7

[0034] A filler for a bioretention system, the filler includes a filler matrix and bio-ceramic, and the bio-ceramic includes a hollow bio-ceramic shell and a sodium polyacrylate superabsorbent resin filled in the bio-ceramic shell, The biological ceramsite shell is provided with 3 openings, and the filler matrix is ​​formed by mixing cattail matrix soil and fine sand. The specific parameters are shown in Table 1.

[0035] Table 1

[0036] serial number

Embodiment 8

[0038] The difference between this example and Example 7 is that the filler matrix also contains 3% iron powder by mass of the matrix.

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Abstract

The invention discloses a filler for a high-efficiency anti-clogging bioretention system. The filler comprises a filler matrix and a bio-ceramic. The bio-ceramic comprises a hollow bio-ceramic shell and sodium polyacrylate superabsorbent resin filled in the bio-ceramic shell. The bio-ceramic shell is provided with an opening, and the filler matrix is composed of a mixture of cattail substrate soiland fine sand. The filler for the high-efficiency anti-clogging bioretention system is provided and composed of the bio-ceramic shell and the sodium polyacrylate superabsorbent resin filled in the bio-ceramic shell. The bio-ceramic can ensure the rainwater retention time and improve the nitrogen and phosphorus removal capacity of a filler layer while ensuring sufficient water permeability and percolation performance of the filler layer and effectively preventing the blockage of the filler layer, so that the rainwater percolation capability of the bioretention system can be improved, and the bioretention system is not easy to block while the rainwater is fully treated.

Description

technical field [0001] The invention relates to the technical field of sponge city rainwater treatment, and more particularly relates to a filler used in 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 ...

Claims

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Application Information

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IPC IPC(8): C02F3/00C02F3/32C02F101/10C02F101/16C02F101/30C02F101/38
CPCC02F3/00C02F3/32C02F2003/001C02F2101/105C02F2101/16C02F2101/30C02F2101/38C02F2103/001
Inventor 王文静阳重阳曹姝文刘小平李锐敬许嘉辉黄子逸
Owner GUANGZHOU EP ENVIROMENTAL ENG
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