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Heavy metal repairing material based on organic sludge and use method of material

A repair material and organic sludge technology, applied in the direction of organic fertilizer, restoration of polluted soil, soil conditioning materials, etc., can solve the problems of high cost, failure to achieve volume reduction and resource utilization, increase in dry matter, and achieve increase Soil cation exchange capacity, widening the field of resource utilization, and reducing the effect of bioavailability

Inactive Publication Date: 2016-10-12
GEZHOUBA ZHONGGU TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional physical restoration methods (soil replacement, turning and throwing, thermal desorption, etc.) have the disadvantages of large engineering volume and high cost; the use of bio-enrichment (earthworm, plant and microbial enrichment) has a long restoration period and is suitable for The traditional chemical solidification and stabilization method can change the form of heavy metals in the soil, and significantly reduce the proportion of heavy metals in the soil that are easily absorbed by crops, such as water-soluble, exchangeable, and organically bound. Therefore, chemical solidification Stabilization is still a viable mainstream disposal method in the heavy metal remediation market
[0003] The invention patent with the Chinese patent application number 201310251933.3 discloses a heavy metal curing agent that adds biological fungi to organic matter. Improve soil fertility and solidify soil heavy metals at the same time, and then the organic matter is a special organic fertilizer, the price is high, and the reproduction and restoration cycle of biological chrysanthemum is long, and the adaptability is relatively limited
Existing methods cannot effectively remove or control heavy metals, pathogenic bacteria, odor, etc. in sludge, deep dehydration of sludge, and even significantly increase the amount of dry matter, failing to achieve the original intention of volume reduction and resource utilization
Therefore, it has great limitations

Method used

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  • Heavy metal repairing material based on organic sludge and use method of material
  • Heavy metal repairing material based on organic sludge and use method of material
  • Heavy metal repairing material based on organic sludge and use method of material

Examples

Experimental program
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Effect test

Embodiment 1

[0030] A heavy metal restoration material based on organic sludge, prepared from raw materials with the following mass fractions:

[0031] Organic treatment sludge 40%

[0032] Mineral material 45%

[0033] Compound stabilizer 15%.

[0034] The organic treatment sludge is prepared by the following process: 1) the municipal domestic sludge is treated with an aerobic digestion process, and then dehydrated by pressure filtration to obtain a filter cake with a water content of 60%; 2) The filter cake is composted, fermented at 45°C for 5 days, then transferred to the ripening room for ripening, sterilization and deworming eggs, and ripened for 10 days; 3) After the ripening is completed, it is further dried and dehydrated until the moisture content reaches 20%, and organic treatment is obtained sludge.

[0035] The mineral material is composed of limestone, slag and zeolite, wherein the mass ratio of limestone, slag and zeolite is 1:7:2.

[0036] The compound stabilizer is com...

Embodiment 2

[0050] A heavy metal restoration material based on organic sludge, prepared from raw materials with the following mass fractions:

[0051] Organic treatment sludge 65%

[0052] Mineral material 30%

[0053] Compound stabilizer 5%.

[0054] The organic treatment sludge is prepared by the following process: 1) the municipal domestic sludge is treated with an aerobic digestion process, and then dehydrated by pressure filtration to obtain a filter cake with a moisture content of 55%; 2) The filter cake is composted, fermented at 35°C for 8 days, then transferred to the ripening room for ripening, sterilization and deworming eggs, and ripened for 15 days; 3) After the ripening is completed, it is further dried and dehydrated until the moisture content reaches 10%, and organic treatment is obtained sludge.

[0055] The mineral material is composed of limestone, slag and sepiolite, wherein the mass ratio of limestone, slag and sepiolite is 2:7:1.

[0056] The compound stabilizer ...

Embodiment 3

[0069] A heavy metal restoration material based on organic sludge, prepared from raw materials with the following mass fractions:

[0070] Organic treatment sludge 85%

[0071] Mineral material 14%

[0072] Compound stabilizer 1%.

[0073] The organic treatment sludge is prepared by the following process: 1) the municipal domestic sludge is treated with an aerobic digestion process, and then dehydrated by pressure filtration to obtain a filter cake with a water content of 45%; 2) The filter cake is composted, fermented at 45°C for 10 days, then transferred to the aging room for aging, sterilization and deworming eggs, and aging for 10 days; 3) After the aging is completed, it is further dried and dehydrated to a moisture content of 20% to obtain organic treatment sludge.

[0074] The mineral material is composed of limestone, slag and zeolite, wherein the mass ratio of limestone, slag and zeolite is 2:5:3.

[0075] The compound stabilizer is composed of calcium hydroxide, ...

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Abstract

The invention discloses a heavy metal restoration material based on organic sludge and a method for using the same. The restoration material is prepared from a certain proportion of organic treatment sludge, mineral materials and a compound stabilizing regulator as raw materials. The method of use is: add the heavy metal restoration material based on organic sludge to the contaminated soil polluted by heavy metals, wherein the mass ratio of the heavy metal restoration material based on organic sludge to the contaminated soil is 1:3-10, add water and stir to mix evenly , standing and aging for 15-60 days at a temperature of 5°C-45°C, an air humidity of 25%-90%, and a soil moisture content of 10%-60%. The restoration material can not only realize the resource utilization of urban sludge, but also solidify heavy metals in polluted soil, reduce the absorption of heavy metals by crops, improve soil structure, increase soil fertility, and revitalize barren land, and the cost of raw materials is extremely low. The usage method is simple and convenient to operate.

Description

technical field [0001] The invention belongs to the technical field of environmental protection and restoration, and in particular relates to a heavy metal restoration material based on organic sludge and a method for using the same. The restoration material can not only improve soil fertility, but also stably solidify heavy metal elements in polluted soil. The repair material is mainly suitable for resource utilization of urban sludge and soil heavy metal restoration projects, especially for the treatment and disposal of barren soil polluted by heavy metals. Background technique [0002] Soil is the basis for human activities and survival. In recent years, the problem of heavy metal pollution in my country's soil has become increasingly serious, and heavy metals in the soil have continued to accumulate. The research results show that the total amount of heavy metals in the soil cannot well reflect the accumulation of heavy metals in crops. As a result, only some forms of hea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/10B09C1/00C09K17/40C09K17/00C09K101/00
CPCB09C1/10B09C1/00C09K17/00C09K17/40C09K2101/00
Inventor 匡丕桩洪军陈伟程柳汪萌李世汨
Owner GEZHOUBA ZHONGGU TECH CO LTD
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