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A kind of light cultivation substrate for roof greening and preparation method thereof

A technology for cultivation substrate and roof greening, applied in the directions of planting substrate, botanical equipment and methods, culture medium, etc., can solve the problems of high maintenance cost and high soil bulk density, and achieves easy popularization and application, increases the amount of plants, and is conducive to resource utilization. The effect of using

Inactive Publication Date: 2020-06-30
SOUTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a light-weight cultivation substrate for green roofs and a preparation method thereof, to solve the problems of higher soil bulk density, greening costs and higher maintenance costs of existing roof greening. At the same time, it also solves the resource utilization problems of urban solid waste sludge and agricultural waste branches, straw, etc.

Method used

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  • A kind of light cultivation substrate for roof greening and preparation method thereof
  • A kind of light cultivation substrate for roof greening and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1) Trim 5 kg of air-dried branches or straws to 20~30cm, and put them in such as figure 1 In the self-made biochar furnace shown, it was pyrolyzed in a closed pyrolysis chamber under anoxic conditions for 1 hour at a temperature of 600°C to obtain biochar, and then the biochar was cooled, pulverized, and sieved to make the particle size Below 5mm, biochar particles are obtained;

[0025] 2) Take the biological sludge from the oxidation ditch process, dehydrate the above biological sludge by belt plate and frame filter press, so that the moisture content of the biological sludge is 80%, and then turn it over and expose it to the sun for 4 hours under sufficient sunlight, and use it at noon The strong ultraviolet rays of the sun can kill germs without losing the carbon source in the sludge, reduce the moisture content of the biological sludge, and then carry out high-temperature composting and decomposing. The E. coli in the sludge is reduced by 2.7×10 5 The roundworm eg...

Embodiment 2

[0031] 1) Trim 30kg of air-dried branches or straws to 20~30cm, and put them into figure 1In the self-made biochar furnace shown, it was pyrolyzed in a closed pyrolysis chamber under anoxic conditions for 6 hours at a temperature of 500°C to obtain biochar, and then the biochar was cooled, pulverized, and sieved to make the particle size Below 5mm, biochar particles are obtained;

[0032] 2) Take the biological sludge from the oxidation ditch process, dehydrate the above biological sludge by belt-type plate and frame filter press, so that the moisture content of the biological sludge is 70%, and then turn it over and expose it to the sun for 4 hours under sufficient sunlight, and use it at noon The strong ultraviolet rays of the sun can kill germs without losing the carbon source in the sludge, reduce the moisture content of the biological sludge, and then carry out high-temperature composting and decomposing. The E. coli in the sludge is reduced by 2.7×10 5 The roundworm egg...

Embodiment 3

[0037] 1) Trim 60kg of air-dried branches or straw to 20~30cm, and put them into figure 1 In the self-made biochar furnace shown, it was pyrolyzed in a closed pyrolysis chamber under anoxic conditions for 12 hours at a temperature of 400°C to obtain biochar, and then the biochar was cooled, pulverized, and sieved to make the particle size Below 5mm, biochar particles are obtained;

[0038] 2) Take the biological sludge discharged from the secondary sedimentation tank of the urban sewage treatment system, and use belt-type plate and frame filter press to dehydrate the above biological sludge, so that the moisture content of the biological sludge is 75%, and then turn over the pile under sufficient sunlight Expose to the sun for 4 hours, use the strong ultraviolet rays of the sun at noon to kill bacteria without losing the carbon source in the sludge, reduce the moisture content of the biological sludge, and then carry out high-temperature composting and decomposing, the E. coli...

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Abstract

The invention discloses a light cultivation substrate used for roof greening and a preparation method thereof. The cultivation substrate is prepared from, by mass, 1-5% of charcoal particles, 0-50% offield soil, and biological sludge as the balance. The light cultivation substrate is rich in organic matter, nitrogen, phosphorus, other nutrients, trace elements and water and also has good water retention and fertilizer retention performance. The nutritional demand and water demand of plants used for roof greening can be met for a long time, water used for artificial maintenance and irrigationcan be reduced, and the greening cost and the maintenance cost are reduced. The substrate is light, can significantly reduce roof load and does not affect a building structure. The components of the cultivation substrate are simple, the raw materials are easy to obtain, the cost is low, and the cultivation substrate has a good application prospect.

Description

technical field [0001] The invention belongs to the intersection field of building energy saving and environmental protection, and in particular relates to a light-weight cultivation substrate for roof greening and a preparation method thereof. Background technique [0002] Roof greening can reduce building energy consumption, reduce the temperature of the inner surface of the roof, and effectively improve the urban environment. As an ecological energy-saving facility, it has been widely recognized. However, due to the high bulk density of green roof soil, the thickness is usually more than 15cm, resulting in increased building loads, affecting the building structure, coupled with the high cost of irrigation and maintenance of roof green plants, of which the cultivation substrate of green roofs accounts for about 20% of the total cost , therefore, greatly limits the popularization of roof greening. [0003] As the volume of urban sewage treatment in my country continues to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01G24/23A01G24/20A01G24/12C10B53/02
CPCC10B53/02Y02E50/10
Inventor 潘云霞张寓涵王乐乐郑训涛李思阳关正军
Owner SOUTHWEST UNIV