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Sludge biological carbon based light long-effect roof greening cultivation medium and preparation method thereof

A roof greening and cultivation substrate technology, applied in the fields of botanical equipment and methods, cultivation, soilless cultivation, etc., can solve the problems of incomplete killing of pathogenic bacteria, loose particles in contact with water, blockage of sewer pipes, etc. Reasonable price and easy access to materials

Inactive Publication Date: 2017-09-15
ANHUI SCI & TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the fermented products of sludge composting have high fertility, as a green roof substrate, the bulk density is still high, and the particles are loose when exposed to water, which can easily cause blockage of sewer pipes
In addition, if the aerobic composting process is not well controlled, the pathogenic bacteria in the sludge composting products will not be completely killed, which will infect plants, and the sludge composting products will also emit odor, which is easy to attract insects and birds

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Naturally dry the sludge from the urban domestic sewage treatment plant, then place the dried sludge in a large muffle furnace, heat it up to 300°C at a heating rate of 10°C / min, maintain the temperature for 4 hours, and wait for the biochar to cool Crush and sieve to prepare a sludge biochar product with an average diameter of about 3 mm. In a roof greening project, according to the proportion by weight of 82% of sludge biochar, 2% of long-acting slow-release compound fertilizer, 2% of water-retaining agent, and 14% of perlite, the raw materials are mixed evenly. After laying a layer of ceramsite on the roof, evenly spread the mixed substrate on the green roof planting area with a thickness of 30cm. After raking and compacting the substrate, plant green roof plants.

Embodiment 2

[0025] Naturally dry the sludge from the urban domestic sewage treatment plant, then place the dried sludge in a large muffle furnace, heat it up to 300°C at a heating rate of 10°C / min, maintain the temperature for 4 hours, and wait for the biochar to cool Crush and sieve to prepare a sludge biochar product with an average diameter of about 3 mm. In a roof greening project, according to the proportion by weight of 82% of sludge biochar, 1% of long-acting slow-release compound fertilizer, 4% of water-retaining agent, and 13% of perlite, the raw materials are mixed evenly. After laying a layer of ceramsite in the roof greening pot container, evenly spread the mixed substrate in the pot with a thickness of 30cm. After raking and compacting the substrate, plant green roof plants.

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Abstract

The invention relates to a sludge biological carbon based light long-effect roof greening cultivation medium and a preparation method thereof. After sludge of a municipal domestic wastewater treatment plant is naturally dried, the sludge is placed in a muffle furnace and heated to 300 DEG C at the heating rate of 10 DEG C / min, the temperature is kept for 4 hours, biological carbon is cooled, crushed and screened to prepare sludge biological carbon products with the average diameter of about 3mm. The sludge biological carbon is uniformly mixed with long-effect slow-release compound fertilizers, water-retaining agents and perlite according to weight percent, the weight percent of the sludge biological carbon is 82%, the weight percent of the long-effect slow-release compound fertilizers is 1-2%, the weight percent of the water-retaining agents is 2-4%, and the weight percent of the perlite is 12-15%. Preparation raw materials are wide in source, and a preparation process is simple. The sludge biological carbon serving as a main preparation material is safe, sanitary, free from extraneous odor and thorough in pathogenic bacteria killing and avoids attracting insects and birds. The prepared cultivation medium has the advantages of light volume weight, long fertilizer effect, difficulty in blocking drainage pipelines, wide applicable range, reasonable cost and easiness in popularization.

Description

technical field [0001] The invention relates to a sludge biochar-based light-duty long-acting roof greening cultivation substrate and a preparation method thereof. Background technique [0002] Urban architecture is increasingly emphasizing the coordination between buildings and the natural environment, and more green spaces need to be introduced into buildings. Roof greening is a space greening form based on the top platform of the building to create a garden landscape. It has played a significant role in reducing dust, purifying the air, and alleviating the urban heat island effect. At the same time, it also increases the urban greening area, saves urban land, and enriches Urban green landscape. Therefore, green roofs have become an architectural trend in densely populated cities. As a garden form different from ground greening, roof greening has special requirements for the selection of cultivation substrates. Considering the reduction of the roof load, the roof greeni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00A01G9/10A01G31/00
CPCC05G3/00C05F9/00C05G1/00
Inventor 谢越马万征李飞跃
Owner ANHUI SCI & TECH UNIV
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