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Preparation method of sludge ceramsite used for potting soil filler and application thereof

A technology of sludge ceramsite and filler, applied in botany equipment and methods, clay products, cultivation, etc., can solve problems such as waste of nutrient resources, environmental hazards, and generation of odorous gases, so as to facilitate plant growth and reduce energy consumption , The effect of saving materials

Active Publication Date: 2016-09-21
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If they are directly discharged into the environment, in addition to causing harm to the environment, it is also a waste of nutritional resources
Direct exposure of sludge to the environment will bring the following impacts: pathogenic microorganisms, refractory toxic organic substances, and heavy metals in sludge will seriously pollute water and soil; Produce foul-smelling gas and pollute the environment

Method used

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  • Preparation method of sludge ceramsite used for potting soil filler and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1) Take some sludge from Hangzhou Qige Sewage Treatment Plant, put it in an oven and dry it at 110°C for 2 hours to obtain dry sludge with a moisture content of about 50%;

[0020] (2) Mix the dehydrated dry sludge and clay at a volume ratio of 1:1.1, so that the mixed material has good viscosity, and stir evenly to obtain a clay-like material; put the clay-like material into a granulator to make granules to obtain raw material balls, the particle size is about 8-10mm, and the size is suitable for potting filler;

[0021] (3) Put the obtained raw meal balls into a rotary furnace and dry at 100°C for 50 minutes; then raise the temperature to 400°C at a rate of 4°C and keep it for 30 minutes; then gradually increase from 400°C to 1000°C at a rate of 5°C After roasting at 1000°C for 30 minutes, the temperature is naturally lowered, so that the structure of the fired ceramsite is more stable and strong, and the sludge ceramsite can be obtained after taking it out.

[0022]...

Embodiment 2

[0026] 1) Take some sludge from Hangzhou Qige Sewage Treatment Plant, put it in an oven and dry it at 110°C for 2 hours to obtain dry sludge with a moisture content of about 45%;

[0027] (2) Mix the dehydrated dry sludge and clay at a volume ratio of 1:1, so that the mixed material has good viscosity, and stir evenly to obtain a clay-like material; put the clay-like material into a granulator to make granules to obtain raw material balls, the particle size is about 8-10mm, and the size is suitable for potting filler;

[0028] (3) Put the obtained raw meal balls into a rotary furnace and dry at 90°C for 50 minutes; then raise the temperature to 350°C at a rate of 3°C and keep it for 40 minutes; then gradually increase from 350°C to 900°C at a rate of 4°C After roasting at 900°C for 40 minutes, the temperature is naturally lowered, so that the structure of the fired ceramsite is more stable and strong, and the sludge ceramsite can be obtained after taking it out.

[0029] (4) ...

Embodiment 3

[0032] 1) Take some sludge from Hangzhou Qige Sewage Treatment Plant, put it in an oven and dry it at 110°C for 2 hours to obtain dry sludge with a moisture content of about 55%;

[0033] (2) Mix the dehydrated dry sludge and clay at a volume ratio of 1:1.2, so that the mixed material has good viscosity, and stir evenly to obtain a clay-like material; put the clay-like material into a granulator to make granules to obtain raw material balls, the particle size is about 8-10mm, and the size is suitable for potting filler;

[0034] (3) Put the obtained raw meal balls into a rotary kiln and dry at 110°C for 50 minutes; then raise the temperature to 450°C at a rate of 6°C and keep it for 30 minutes; then gradually increase from 450°C to 1200°C at a rate of 6°C , after roasting at 1200°C for 30 minutes, cool down naturally, so that the structure of the fired ceramsite is more stable and strong, and the sludge ceramsite can be obtained after taking it out.

[0035] (4) Get a certain...

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Abstract

The invention discloses a preparation method of sludge ceramsite used for potting soil filler and application thereof. The method includes drying the sludge, mixing the sludge and the clay according to a certain ratio uniformly to make raw material balls, drying the raw material balls, preheating the dried raw material balls at a certain temperature for a certain time, preforming roasting and cooling to obtain sludge ceramsite, putting the ceramsite into the prepared biochar powder to make the surface of the ceramsite covered with biochar powder, using molten state sulphur as a thin-film material, adding the ceramsite adhering to biochar powder to make the surface of the ceramsite covered with sulphur, putting the ceramsite into a dryer, and preforming drying to obtain the sludge ceramsite releasing biochar slowly. The ceramsite can be used as the potting soil filler, and the biochar can provide nourish to make the plant grow up.

Description

technical field [0001] The invention belongs to the field of environmental protection, and in particular relates to a preparation method of sludge ceramsite used as potting soil filler. Background technique [0002] With the continuous development of our country's economy, the amount of sewage treatment in cities is increasing day by day, and the sludge produced by sewage treatment plants is also increasing sharply. If the sludge is directly exposed to the environment without proper treatment, it will not only cause serious secondary pollution, but also pose a threat to human health. Therefore, the sludge needs to be reduced, stabilized, and harmless, and further disposed of, so as to avoid secondary pollution as much as possible. [0003] Sludge as a by-product of sewage treatment has complex components. In addition to a large amount of water, it also contains nutrients such as nitrogen and phosphorus, heavy metals, and organic matter. If they are directly discharged into...

Claims

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Application Information

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IPC IPC(8): C04B33/132C04B41/89A01G9/10
CPCA01G24/00C04B33/1321C04B41/52C04B41/89C04B41/5001C04B41/4545C04B41/50C04B41/4523Y02P40/60
Inventor 梁新强刘子闻金熠华桂芬李美儒张慧芳陈玲玲
Owner ZHEJIANG UNIV
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