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Heavy metal stabilizer for treating sludge, and use method thereof

A heavy metal stabilizer and sludge technology, applied in sludge treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., to achieve reliable long-term stability, low cost, and simple use methods

Inactive Publication Date: 2018-01-05
李杰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, some soil heavy metal stabilization treatment technologies that have been developed so far still use sulfide, but the application of sulfide has the above-mentioned shortcomings.

Method used

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  • Heavy metal stabilizer for treating sludge, and use method thereof
  • Heavy metal stabilizer for treating sludge, and use method thereof
  • Heavy metal stabilizer for treating sludge, and use method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Table 1-1 shows that the TCLP results of a city sludge of A are high in mercury, zinc and arsenic leaching toxicity concentrations, and the mercury leaching toxicity concentration exceeds the TCLP international standard value of 0.2mg / L, and necessary stabilization treatment is required.

[0036] Table 1-1 The original sample data of a certain A municipal sludge (mg / L, leached by US TCLP method 1311)

[0037]

[0038] According to analysis judgments such as sludge original state property, pH value and experience, prepare a test heavy metal stabilizer formulation sample of following component and weight percent composition: phosphate (calcium magnesium phosphate fertilizer) 35.0%, calcium oxide 30%, and adsorbent ( activated carbon) 35.0%.

[0039] The test was carried out at one time, including a test formula sample and a dosage of 8.0%; the original test sludge was 120g, and all materials, including the original sludge and heavy metal stabilizer, were fully stirred ...

Embodiment 2

[0044] Table 2-1 shows the TCLP results of a certain B city sludge, which shows that the leaching toxicity concentration of total chromium and cadmium is very high, and the chromium leaching toxicity concentration exceeds the TCLP international standard value of 5.0mg / L, and necessary stabilization treatment is required.

[0045] Table 2-1: Data of a certain B city sludge (mg / L, leached according to US TCLP method 1311)

[0046]

[0047] According to the analysis and judgment of the original state of sludge, pH value and experience, a test heavy metal stabilizer formula sample composed of the following components and weight percentages is prepared: 30.0% of phosphate (GPS), 35% of calcium oxide, and adsorbent (activated alumina) 35.0%.

[0048] The test was carried out at one time, including a test formula sample and a dosage of 10.0%; the original test sludge was 120g, and all materials, including the original sludge and heavy metal stabilizer, were fully stirred and mixed...

Embodiment 3

[0053] The results of TCLP in a certain C city sludge are shown in Table 1, which shows that the lead leaching toxicity concentration is very high, exceeding the TCLP international standard value of 5.0mg / L, and necessary stabilization treatment is required.

[0054] Table 3-1: Data of the original sample of city sludge in a certain C (mg / L, leached according to US TCLP method 1311)

[0055]

[0056] According to analysis and judgment such as sludge original sample property, pH value and experience, prepare a test heavy metal stabilizer formulation sample of following components and weight percentage composition: phosphate (trisodium phosphate) 35.0%, magnesium oxide 35%, and adsorbent ( activated alumina) 30.0%.

[0057] The test was carried out at one time, including a test formula sample and a dosage of 5.0%; the original test sludge was 120g, and all materials, including the original sludge and heavy metal stabilizer, were fully stirred and mixed for about 15 minutes. ...

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Abstract

The invention relates to a heavy metal stabilizer for treating sludge and a method for using the heavy metal stabilizer. Composition of substances and adsorbents. The method of use includes: fully stirring and mixing phosphate, inorganic alkaline substances and adsorbents in proportion, and then adding sludge for maintenance. The invention does not contain any organic chelating agent such as dithiocarbamate or sulfide, has no secondary pollution and pollution-free; the method of use is simple, the cost is low, and it meets the benefits of energy saving and carbon reduction, economic benefits, and has good application prospects.

Description

technical field [0001] The invention belongs to the field of heavy metal stabilizers, in particular to a heavy metal stabilizer for treating sludge and a use method thereof. Background technique [0002] Sludge from urban sewage plants refers to the solid, semi-solid and liquid wastes produced by sewage treatment, containing a large amount of organic matter, rich in nutrients such as nitrogen and phosphorus, heavy metals, pathogenic bacteria and pathogenic bacteria, etc. The sludge has not been stabilized If the waste is discharged arbitrarily for necessary harmless treatment such as desalination and deworming eggs, such as overflowing into the water body, as backfill soil or restoration soil, it will cause serious pollution to the water body and the environment. According to statistics, among the current sludge disposal methods, landfill accounts for 63.0%, sludge aerobic fermentation + agricultural use accounts for about 13.5%, sludge natural drying and comprehensive utili...

Claims

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Application Information

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IPC IPC(8): C02F11/00C02F101/20
Inventor 李杰石翰勋
Owner 李杰
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