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Green sludge curing agent and application of green sludge curingagent in sludge solidification

A technology of curing agent and sludge, applied in green sludge curing agent and its application in sludge curing, can solve problems such as difficulty in sludge curing and reuse, and achieve the effect of improving curing effect, good effect and simple raw material.

Inactive Publication Date: 2019-10-08
杨诚龙
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of these chromium end up in the sludge, which brings great difficulties to the solidification and reuse of the sludge
[0006] However, there is a lack of a curing agent for high chromium sludge in the prior art

Method used

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  • Green sludge curing agent and application of green sludge curingagent in sludge solidification
  • Green sludge curing agent and application of green sludge curingagent in sludge solidification

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A kind of green sludge solidifying agent, is made up of following composition by weight:

[0036] 5 parts of microcrystalline cellulose, 50 parts of fly ash, 30 parts of calcium sulfate, 8 parts of aluminum silicate, and 5 parts of spinel.

[0037] The method for preparing green sludge curing agent, the steps are as follows:

[0038] Add each raw material into a stirrer according to the required weight portion, stir at a speed of 100 rpm for 2 hours, transfer to a heater, heat to 60° C., and keep for 3 hours to obtain the product.

[0039] The application of the above-mentioned green sludge curing agent in the solidification of high chromium sludge, the steps are as follows:

[0040] S1, microbial treatment: add 3 parts of sulfur powders, 3 parts of iron powders, 5 parts of Desulfovibrio culture medium, 60 parts of sludge by weight in the container, inoculate Desulfovibrio under anaerobic conditions, the ratio of inoculum liquid to 1:20, anaerobic fermentation at 35°C...

Embodiment 2

[0044] A kind of green sludge solidifying agent, is made up of following composition by weight:

[0045] 5 parts of acrylic anhydride modified microcrystalline cellulose, 50 parts of fly ash, 30 parts of calcium sulfate, 8 parts of aluminum silicate, 5 parts of spinel;

[0046] The preparation method steps of the microcrystalline cellulose modified by the acrylic anhydride are as follows:

[0047]Mix 10 parts of microcrystalline cellulose, 0.5 parts of DMAP and 150 parts of DMF in parts by weight, add 5 parts of acrylic anhydride, 600W / 40Hz ultrasonic for 30 minutes, heat up to 60°C, stir at 300rpm for 2 hours, pass through 500 mesh Sieve, take the solid, and dry at 100°C for 8 hours to obtain the product.

[0048] The method for preparing green sludge curing agent, the steps are as follows:

[0049] Add each raw material into a stirrer according to the required weight portion, stir at a speed of 100 rpm for 2 hours, transfer to a heater, heat to 60° C., and keep for 3 hours...

Embodiment 3

[0055] A kind of green sludge solidifying agent, is made up of following composition by weight:

[0056] 5 parts of maleic anhydride modified microcrystalline cellulose, 50 parts of fly ash, 30 parts of calcium sulfate, 8 parts of aluminum silicate, 5 parts of spinel;

[0057] The microcrystalline cellulose preparation method step of described maleic anhydride modification is as follows:

[0058] Mix 10 parts of microcrystalline cellulose, 0.5 parts of DMAP and 150 parts of DMF in parts by weight, and then add 5 parts of maleic anhydride, ultrasonicate at 600W / 40Hz for 30 minutes, heat up to 60°C, stir at 300rpm for 2 hours, pass 500 Mesh sieve, take the solid, and dry at 100°C for 8 hours to obtain.

[0059] The method for preparing green sludge curing agent, the steps are as follows:

[0060] Add each raw material into a stirrer according to the required weight portion, stir at a speed of 100 rpm for 2 hours, transfer to a heater, heat to 60° C., and keep for 3 hours to ob...

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Abstract

The invention provides a green sludge curing agent and application of the green sludge curing agent in sludge solidification, and belongs to the field of sludge treatment. The green sludge curing agent is prepared from the following components in parts by weight: 3-8 parts of microcrystalline cellulose, 30-50 parts of fly ash, 20-40 parts of calcium sulfate, 5-10 parts of silicate and 5-10 parts of spinel, wherein the microcrystalline cellulose is preferably organic-acid-anhydride-modified microcrystalline cellulose. The application of the green sludge curing agent in sludge solidification comprises the following steps that S1, microbial treatment is carried out, specifically, powdered sulfur , iron powder, a desulfovibrio medium and sludge are added into a container, desulfovibrio is inoculated under the anaerobic condition, anaerobic fermentation is carried out for 5-10 days to obtain fermented sludge; S2, sterilization is carried out, specifically, a fungicide is added to the fermented sludge, the mixture is stirred for 5-10 hours to obtain sterilized sludge; and S3, curing is carried out, specifically, the green sludge curing agent is added to the sterilized sludge, and the mixture is stirred evenly and stands still, that is, cured sludge is obtained. The green sludge curing agent has excellent mechanical performance, thermal stability and water resistance.

Description

technical field [0001] The invention relates to the field of sludge treatment, in particular to a green sludge solidifying agent and its application in sludge solidification. Background technique [0002] Silt is a special soil with characteristics different from ordinary soil. The silty soft soil has a high water content, generally greater than 40%, and has rheological and thixotropic properties; the color is generally dark gray or dark green, and has an odor; the natural void ratio is greater than 1.0; it contains organic matter, and even becomes peat soil ( When the organic matter content is greater than 50%); low strength, high compressibility, poor water permeability, low shear strength, etc. Its high water content and rich organic matter are the most notable characteristics of sludge, which affects other properties. The water content in the sludge varies greatly, for example, some water content is greater than the liquid limit, while others are opposite. The higher ...

Claims

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Application Information

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IPC IPC(8): C02F11/04C02F11/00C02F101/22
CPCC02F11/004C02F11/008C02F11/04C02F2101/22
Inventor 杨诚龙
Owner 杨诚龙
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