Method for carbonized materials loaded in road green belt to purify run-off rainwater in situ

A technology of carbonization materials and green belts, applied in the field of environmental engineering, can solve the problems of low processing efficiency and unsuitable for large-scale use, and achieve the effect of reducing the concentration of pollutants, fast and efficient concentration of pollutants, and reducing greenhouse gas emissions

Active Publication Date: 2013-09-04
中化环境修复(上海)有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods have low treatment efficiency and are not suitable for large-scale application.

Method used

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  • Method for carbonized materials loaded in road green belt to purify run-off rainwater in situ

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Take the straw from a farm in the suburbs of Shanghai, dry it, crush it to a particle size of 2 cm, heat it to 500°C in a nitrogen atmosphere and keep it for 4 hours to fully pyrolyze it into biochar. Afterwards, the biochar is taken out and pressed to a powder state with a particle size of 0.5-1 mm. In the simulated green belt device, a layer of pebbles with a particle size range of about 0.5-2cm is laid at the bottom as a drainage layer. Lay a 5cm biochar filter layer on top. A 10cm soil layer is placed on top of the biochar. The vegetation layer above the soil is 5 cm. The vegetation is green grass on the road. The green belt model area is 0.056m 2 , The rainfall in Shanghai is 50mm·h during heavy rain -1 Calculate, the rainfall amount discharged in 1h V=50×10 -3 ×0.056×10 3 =2.8L. Use tap water to artificially prepare simulated polluted runoff rainwater so that its pollutant content is: total phosphorus (TP) 20mg·L -1 , Ammonia nitrogen (NH 4 + -N)15mg·L -1 , Met...

Embodiment 2

[0035] Take barley grass from a city in Jiangsu Province, dry it, crush it to a particle size of 2cm, heat it to 500°C in a nitrogen atmosphere and keep it for 4 hours to fully pyrolyze it into biochar. Afterwards, the biochar is taken out and pressed to a powder state with a particle size of 0.5-1 mm. In the simulation device, a layer of pebbles with a particle size range of about 0.5-2cm is laid on the bottom as a drainage layer. Lay a 5cm biochar filter layer on top. The soil layer above the biochar is 10cm, and the vegetation layer above the soil is 5cm. The vegetation is green grass on the road. The green belt model area is 0.056m 2 , The rainfall in Shanghai is 50mm·h during heavy rain -1 Calculate, the rainfall amount discharged in 1h V=50×10 -3 ×0.056×10 3 =2.8L. Use tap water to artificially prepare simulated polluted runoff rainwater so that its pollutant content is: total phosphorus (TP) 15mg·L -1 , Ammonia nitrogen (NH 4 + -N)10mg·L -1 , Metallic lead (Pb) 0.6mg·...

Embodiment 3

[0037] Take the fallen leaves from the gardens in Minhang District, Shanghai, air-dry and crush them to a particle size of 2cm, heat them to 500°C in a nitrogen atmosphere and keep them for 4 hours to fully pyrolyze them into biochar. Afterwards, the biochar is taken out and pressed to a powder state with a particle size of 0.5-1 mm. In the simulated container, a layer of pebbles with a particle size range of about 0.5-2cm is laid on the bottom as a drainage layer, and a biochar filter layer of 8cm is laid on the top. The soil layer is 15cm above the biochar, and the vegetation layer above the soil is 8cm. The vegetation is green grass on the road. The green belt model area is 0.056m 2 , The rainfall in Shanghai is 50mm·h during heavy rain -1 Calculate, the rainfall amount discharged in 1h V=50×10 -3 ×0.056×10 3 =2.8L. Use tap water to artificially prepare simulated polluted runoff rainwater so that its pollutant content is: total phosphorus (TP) 20mg·L -1 , Ammonia nitrogen ...

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Abstract

The invention discloses a method for carbonized materials loaded in a road green belt to purify run-off rainwater in situ. The method for carbonized materials loaded in the road green belt to purify the run-off rainwater in situ comprises the following steps that biomass waste like crop straws and park dead leaves is converted into charcoal, and the charcoal is arranged under the rhizosphere soil layer of plants in the road green belt and serves as adsorbent to absorb and remove pollutant in the run-off rainwater. The invention further relates to the multifunctional road green belt capable of purifying the run-off rainwater and a laying method of the multifunctional road green belt. The green belt comprises a vegetation layer, a soil layer, a charcoal layer, a water drainage layer and a sewer tunnel layer from top to bottom. According to the method for carbonized materials loaded in the road green belt to purify the run-off rainwater in situ, the run-off rainwater on the road is led to the green belt, pollutants like nitrogen, phosphorus and heavy metal in the rainwater are held back and absorbed through double filtering of soil and the charcoal, and therefore the purpose of rainwater purification is achieved. The method for carbonized materials loaded in the road green belt to purify the run-off rainwater in situ is simple, low in operation cost, can utilize the biomass waste, reduces surface run-off rainwater pollution, is a multi-win run-off rainwater in-situ processing method, and meanwhile expands the functions of the green belt.

Description

Technical field [0001] The invention belongs to the technical field of environmental engineering, relates to the technical field of in-situ treatment of polluted runoff rainwater, and in particular relates to a device and method for in-situ purification of runoff rainwater by a road green belt loaded with carbonized materials. Background technique [0002] In the past noon, with the deterioration of the urban environment, rainwater has been polluted through many ways, containing high concentrations of N, P, heavy metals, organics, oils and other pollutants. The area of ​​impervious ground is increasing rapidly. Rainfall is rapidly transformed into runoff on impervious ground, scouring and entraining large amounts of pollutants into surface water bodies, forming typical non-point source pollution, which has become an important factor affecting the degradation of urban receiving water bodies and estuary pollution. factor. The U.S. EPA listed urban surface runoff as the third large...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G9/02C02F1/28
Inventor 曹心德常国兴赵玲杨帆肖竹君
Owner 中化环境修复(上海)有限公司
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