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Soil conditioner and application method thereof

A soil conditioner and application method technology, applied in the field of soil conditioner and its application, can solve the problems of labor and time-consuming application, large sludge compost volume, inability to remove heavy metals in sludge, etc., so as to improve soil fertility and speed up land recovery. The effect of reclamation and improvement of plant site conditions

Inactive Publication Date: 2014-05-28
JIANGSU POLYTECHNIC COLLEGE OF AGRI & FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Sludge compost has a large volume, high pH, ​​narrow application range, and labor-intensive and time-consuming application. In addition, heavy metals in sludge cannot be removed. Long-term large-scale application of sludge on agricultural land will always cause heavy metals to pollute agricultural land and the food chain.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: A soil conditioner, comprising the following components in weight percentage, calculated by dry weight, 80% of sludge, 20% of fly ash.

[0018] Wherein, the fly ash is a by-product obtained by burning anthracite and limestone powder in a fluidized bed, the water content of the fly ash is less than 5% by weight, and the pH range is 10.6-10.8. The calorific value of anthracite is 3900kcal / kg (calculated by dry weight). 1000 tons of the above fly ash provides the equivalent of 33 tons of calcium carbonate.

[0019] The sludge is municipal sludge with a solid content of 25% (by weight). Before municipal sludge is mixed with fly ash, it is viscous and has no fluidity. When it is piled up to a height of 1.8 meters, there is no water seepage, and the pH is 9.5 above-mentioned soil improver and its application method. The method comprises the following steps:

[0020] (1) First, mix the components in the soil conditioner evenly according to the ratio, and set as...

Embodiment 2

[0024] Embodiment 2: A soil conditioner, comprising the following components in weight percentage, calculated by dry weight, 85% of sludge and 15% of fly ash.

[0025] Wherein, the fly ash is a by-product obtained by burning anthracite and limestone powder in a fluidized bed, the water content of the fly ash is less than 5% by weight, and the pH range is 10.6-10.8. The calorific value of anthracite is 3900kcal / kg (calculated by dry weight). 1000 tons of the above fly ash provides the equivalent of 33 tons of calcium carbonate.

[0026] The sludge is urban sludge with a solid content of 30% (by weight). Before mixing with fly ash, the municipal sludge is viscous and has no fluidity. There is no water seepage when piled up to a height of 1.8 meters, and the pH is 9.5.

[0027] Above-mentioned soil conditioner and application method thereof, the method comprises the steps of:

[0028] (1) First, mix the components in the soil conditioner evenly according to the ratio, and set ...

Embodiment 3

[0033] Embodiment 3: A soil conditioner, comprising the following components in weight percentage, calculated by dry weight, 83% of sludge, 17% of fly ash.

[0034] Wherein, the fly ash is a by-product obtained by burning anthracite and limestone powder in a fluidized bed, the water content of the fly ash is less than 5% by weight, and the pH range is 10.6-10.8. The calorific value of anthracite is 3900kcal / kg (calculated by dry weight). 1000 tons of the above fly ash provides the equivalent of 33 tons of calcium carbonate.

[0035] The sludge is municipal sludge with a solid content of 27% (by weight). Before mixing with fly ash, the municipal sludge is viscous and has no fluidity. There is no water seepage when piled up to a height of 1.8 meters, and the pH is 9.5.

[0036] Above-mentioned soil conditioner and application method thereof, the method comprises the steps of:

[0037] (1) First, mix the components in the soil conditioner evenly according to the ratio, and set...

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Abstract

The invention discloses a soil conditioner. The soil conditioner comprises the following components calculated by dry weight, in percentage by weight: 80%-85% of sludge and 15%-20% of flyash. The soil conditioner is environmental-friendly and suitable for soil remediation in desolated mountains and mine areas, can effectively prevent harmful gases released by the sludge from dispersing into the atmosphere, and at the same time has the effects that the soil fertility is prominently improved and the site condition for a plant is improved as well. The soil conditioner provided by the invention is easy and practicable, enables waste to be profitable, and can quicken soil remediation and land reclamation.

Description

technical field [0001] The invention relates to the field of environmental engineering, in particular to a soil conditioner and its application method. Background technique [0002] With the acceleration of urbanization and the improvement of urban environmental quality requirements, my country's urban sewage treatment business has developed rapidly in recent years. However, the new waste produced by the sewage treatment plant while purifying the sewage - urban sludge has not been properly disposed of. Sludge is easy to corrupt, has stench, contains more pathogens and heavy metals, etc. The irregular disposal of sludge has not only become a new environmental hazard in my country's soil and water environment, but also offset the environmental purification function of sewage treatment plants. It has also become an important obstacle restricting the healthy development of the sewage treatment industry. How to dispose of these increasingly large and highly concentrated wastes ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/02B09C1/08C09K109/00
Inventor 马爱军何任红
Owner JIANGSU POLYTECHNIC COLLEGE OF AGRI & FORESTRY
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