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Sludge solidification treatment framework construction method

A technology of sludge solidification and sludge, which is applied in the direction of sludge treatment, water/sludge/sewage treatment, solid waste management, etc., can solve the problems of occupying farmland or fishing ponds, polluting the environment of sludge dumping points, etc., and achieve reduction Environmental issues, treatment cost reduction, cost reduction effect

Inactive Publication Date: 2005-09-21
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This disposal method will not only pollute the environment around the mud throwing point, but also occupy a large amount of farmland or fish ponds

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Each component of the present invention is mixed uniformly by following percentage by weight:

[0010] Sludge 63.5%

[0011] Cement 15.0%

[0012] Silt 21.5%

[0013] According to this ratio, 236.2kg of solidified material and 338.6kg of sludge are added to each ton of sludge, and the unconfined compressive strength of the solidified sludge can reach 50kPa in 7 days, and the water permeability coefficient of the solidified sludge is less than 10 -7 cm / s,

[0014] It can meet the needs of sludge for landfill disposal or as landfill covering soil. Compared with the method of not using skeleton construction, it can save nearly 10 times the cost to achieve the same curing effect.

Embodiment 2

[0016] Each component of the present invention is mixed uniformly by following percentage by weight:

[0017] Sludge 55.1%

[0018] Cement 13.1%

[0019] Fly Ash 2.3%

[0020] Silt 29.5%

[0021] Using this ratio, add 279.5kg of solidified materials (cement and fly ash) and 535.4kg of sludge to each ton of sludge, and the unconfined compressive strength of the solidified sludge can reach 100kPa within 7 days. It can meet the requirements of filling soil in general engineering, and can save nearly 12 times the cost to achieve the same curing effect compared with the method of not using skeleton construction.

Embodiment 3

[0023] Each component of the present invention is mixed uniformly by following percentage by weight:

[0024] Sludge 57.5%

[0025] Cement 11.1%

[0026] Gypsum 2.7%

[0027] Fly Ash 2.2%

[0028] Silt 26.5%

[0029] Using this ratio, adding 278.3kg of solidified materials (cement, fly ash and gypsum) and 460.8kg of sludge to each ton of sludge, the unconfined compressive strength of the solidified sludge can reach 85kPa within 7 days. It can meet the requirements of filling soil in general engineering, and can save nearly 14 times the cost to achieve the same curing effect compared with the method of not using skeleton construction.

[0030] Explanation of the principle of skeleton construction: Since the main solid components in the sludge are mainly organic matter and biological residues, while the inorganic solid particle components are very small, the strength formed after solidi...

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PUM

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Abstract

The invention relates to sludge solidification treatment framework construction method which comprises charging discarded sludge containing high content of clay particle into sludge containing very little solid content rate, and charging a predetermined proportion of curing material, finally carrying out hydration reaction. Based on percentage by weight, the raw material comprises sludge 50-70%, hardening material 10-20%, sludge 20-30%.

Description

technical field [0001] The invention relates to a new method for solidifying sludge—a skeleton construction method for sludge solidification treatment, which belongs to the technical field of civil engineering materials. Background technique [0002] At present, the disposal of sludge is mainly converted to agricultural use, incineration and landfill. When composting is converted to agricultural use, the hygienic indicators and heavy metal indicators of untreated sludge are difficult to meet the standards for agricultural use. The investment and operating costs of incineration treatment are relatively large. The sludge is sent to the sanitary landfill for landfill disposal. Due to the high moisture content and poor mechanical properties of the sludge, the direct entry of untreated sludge into the landfill often causes engineering disasters such as landslides. Due to the large amount of curing materials and high cost, the traditional curing technology is difficult to be pop...

Claims

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Application Information

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IPC IPC(8): B09B3/00C02F11/00C04B18/30
CPCY02W30/91
Inventor 朱伟李磊张春雨林城
Owner HOHAI UNIV
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