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Method for processing urban sewage sludge

A technology for municipal sludge and treatment methods, which is applied in the fields of sludge treatment, water/sludge/sewage treatment, chemical instruments and methods, etc. Completely eliminate and other problems to achieve the effect of low processing cost and reduction of raw coal

Inactive Publication Date: 2010-07-21
廖炳钰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can immobilize the sludge, there are still disadvantages: one is that the odor and pathogenic microorganisms in the sludge cannot be completely eliminated due to the non-burning method; the other is that the sludge is directly used as bricks The volume reduction rate of materials and sludge is not high, and the treatment volume is large; third, additives such as deodorant, early strength agent, accelerator and activator need to be added, so the treatment cost will be increased

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Embodiment 1 is one of schemes that adopt municipal sludge to make burnt bricks as brick-making raw material.

[0014] According to the ratio of 12 parts of sludge, 34 parts of clay, 43 parts of shale powder, and 11 parts of lignite powder as brick-making raw materials, the moisture content of sludge is 76%, the moisture content of clay is 25%, and the moisture content of shale powder The ratio is 16%, and the moisture content of lignite powder is 15%. These materials are mixed according to the existing red brick production process to make them suitable for extrusion into billets. They are extruded and cut into bricks. After natural drying, the moisture content is reduced to 14.5% to 17.5% and fired in a kiln. , the firing temperature is controlled at 800-1000°C, and after the adobe is completely fired according to the existing red brick firing process, it is cooled out of the kiln to obtain finished bricks.

Embodiment 2

[0015] Embodiment 2 is the scheme two that adopts city sludge to make burnt brick as brick-making raw material:

[0016] According to the ratio of 13 parts of sludge, 33 parts of clay, 42 parts of shale powder, and 10 parts of lignite powder as raw materials for brick making, the water content of sludge is 72%, the water content of clay is 29%, and the water content of shale powder The ratio is 20%, and the moisture content of lignite powder is 21%. These materials are mixed according to the existing red brick production process to make them suitable for extrusion into billets. They are extruded and cut into bricks. After natural drying, the moisture content is reduced to 14.5% to 17.5% and fired in a kiln. . The firing temperature is controlled at 800-1000°C. According to the existing red brick firing process, after the adobe is completely fired, it is cooled and exits the kiln to obtain finished bricks.

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PUM

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Abstract

The invention discloses a method for processing urban sewage sludge. Building bricks are baked by mixing 12-13 parts by weight of sludge, 33-34 parts by weight of clay, 42-43 parts by weight of shale and 10-11 parts by weight of lignite together to obtain brick making materials, wherein the granularities of the shale and the lignite are both less than 3mm. Compared with the traditional method for processing the urban sewage sludge as the building material, the invention has the advantages that peculiar smell is completely eliminated and pathogenic microorganism is inactivated, the volume reduction rate of the urban sewage sludge is large, other chemical additives are not required, heat of combustion of the organic matter in the sewage sludge can be completely utilized, and the processing cost is low.

Description

technical field [0001] The invention relates to the technical field of waste treatment, in particular to a treatment method for sludge generated by activated sludge treatment of urban sewage. Background technique [0002] After the urban sewage is treated by the activated sludge treatment method, excess sludge will be produced. In addition to organic matter, nitrogen, phosphorus, and potassium, this sludge generally also contains a variety of heavy metals. The concentration of a few species exceeds the agricultural standard, which is a toxic and harmful substance, and cannot be placed in agricultural planting, nor can it be placed in a place that can affect the health of humans and animals. [0003] At present, there are many ways to deal with municipal sludge, generally including landfill, incineration and comprehensive utilization. Although the landfill method has low treatment cost, due to the unstable composition of the sludge, the toxic and harmful substances and patho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00C04B30/00C04B33/30E04C1/00
Inventor 廖炳钰
Owner 廖炳钰