Sludge curing treatment agent and method for treating sludge by use of curing treatment agent

A technology for sludge solidification and solidification treatment, which is used in dewatering/drying/concentrating sludge treatment, etc. It can solve the problems of long solidification time and high moisture content of sludge, and achieve the effect of short solidification time and low water content.

Inactive Publication Date: 2014-03-26
SHENZHEN OCEAN POWER INDUSTRIAL CO LTD +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of long solidification time and high moisture content of the treated sludge when the existing sludge solidification treatment agent treats sludge, the present invention provides a new sludge solidification treatment agent

Method used

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  • Sludge curing treatment agent and method for treating sludge by use of curing treatment agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] In the powder mixer, according to the formulations of curing agent A and curing conditioner B in Table 1, various raw materials were added in sequence, and mixed and stirred for 5 to 6 minutes to prepare the finished products of curing agent A and curing conditioner B respectively.

[0039] In the agitator, add curing agent A with 5% of sludge weight to the sludge with a moisture content of 90%, mix and stir for 5-6 minutes, then add solidifying conditioner B and mix and stir for 10-15 minutes, Adjust the pH of the sludge to 8, stir it evenly and then maintain it at room temperature. After 2 days, the unconfined compressive strength of the sludge was tested, and the moisture content of the sludge was tested after 7 days. After 7 days, the heavy metal content of the leaching solution was measured with an atomic absorption spectrophotometer according to the Toxic Leaching of Solid Waste (TCLP) method of the US Environmental Protection Agency. , the test results are listed...

Embodiment 2

[0041] Example 1 was repeated according to the formulations of curing agent A and curing conditioner B in Table 1, wherein the pH of the adjusted sludge was 8.5, and the test results are listed in Table 1.

Embodiment 3

[0043] Example 1 was repeated according to the formulations of curing agent A and curing conditioner B in Table 1, wherein the pH of the adjusted sludge was 7, and the test results are listed in Table 1.

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Abstract

The invention provides a novel sludge curing treatment agent. The curing treatment agent comprises a curing agent A and a curing conditioner B, wherein the curing agent A comprises the following components in percentage by weight: 40-60% of MgO, 5-20% of magnesium chloride salt, 10-20% of SiO2, 10-30% of CaO, 0.1-4% of dehydrating agent and 0-20% of fly ash; the curing conditioner B comprises the following components in percentage by weight: 20-40% of H3PO4, 30-50% of NH4H2PO4 and 20-40% of oxalic acid; the curing agent A accounts for 0.5-10% of the total amount of sludge in treatment by mass; and the curing conditioner B accounts for 0-5% of the total amount of sludge in treatment by mass. By adopting the sludge curing treatment agent provided by the invention to treat the sludge with relatively high water content and particularly water content over 80%, the sludge can be cured generally in 1-2 days, the curing time is short, and the water content is reduced to about 30% 7 days later; after the curing, the water content of the sludge is low; and the sludge after the curing treatment can be subjected to landfill on site or applied to roadbed, greening, earthing, ecological restoration and the like, thereby avoiding secondary pollution to environment.

Description

【Technical field】 [0001] The invention relates to the field of environmental protection, in particular to a sludge solidification treatment agent and a method for treating sludge with the solidification treatment agent. 【Background technique】 [0002] The sludge produced by the sewage treatment plant during the sewage treatment process has a water content as high as 60-99%, which contains a large number of harmful substances such as microorganisms, pathogens, and heavy metals. If it is not treated properly, it will cause serious secondary pollution. [0003] At present, sludge disposal is mainly converted to agricultural use, landfill and incineration. However, due to the high water content of sludge, poor mechanical properties, and high pollutant content, these treatment methods have serious environmental pollution, high treatment costs, or easy to cause pollution. Landfill engineering disasters and other issues. Sludge solidification and stabilization is the most common m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/32C02F11/14
Inventor 刘方张钰陈武昌何唯平
Owner SHENZHEN OCEAN POWER INDUSTRIAL CO LTD
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