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Sludge environment-friendly curing agent

An environmentally friendly curing agent and sludge technology

Inactive Publication Date: 2018-12-18
FOSHAN CHANCHENG DISTRICT NUOGAO ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide an environmentally friendly sludge curing agent for the problem of poor curing performance of commonly used sludge curing agents

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0029] The preparation method of composite base material, comprises the steps:

[0030] (1) Take vermiculite and crush it through a 200-mesh sieve in a pulverizer, take the sieved particles and add reagent A to mix at a mass ratio of 1:20~30, ultrasonically treat at 55~70°C for 15~25min, add sieved particles with a mass ratio of 4~ 8% mercaptoethylamine, shake at 28~35°C for 20~24h, move to a centrifuge, centrifuge at 3000~4000r / min for 10~15min, wash the centrifuge 3~5 times, and dry it in an oven at 70~90°C for 20 ~24h, get modified vermiculite;

[0031] (2) Mix modified vermiculite, fly ash, and sodium bicarbonate solution with a concentration of 0.5 mol / L in a water bath at 30-45°C in a mass ratio of 7:2-4:25, and stir magnetically at 400-600r / min After 1~3h, add the pretreated coal gangue with 20~35% of the mass of modified vermiculite to mix, and shear and disperse at 2000~3000r / min for 15~25min to obtain a dispersion liquid, and take the dispersion liquid at a mass rat...

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PUM

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Abstract

The invention relates to a sludge environment-friendly curing agent and belongs to the field of curing agent. In the invention, firstly, vermiculite powder is soaked in and activated by a salt solution and then is modified with mercaptoethylamine, so that a large number of tiny flake-like products are formed on the surface of a cured product and are interlaced layer by layer, thus forming a compact structure; the curing agent is then contacted with sludge under effect of water pressure, so that a part of the curing agent is embedded in the sludge to slowly achieve the curing effect; with slight stirring, the curing effect is further improved. The curing agent is stable and durably and has multilayer effect. By crushing watermelon peel and banana peel and mixing the watermelon peel and banana peel with active sludge and the like for fermentation, a plurality of organic acids are generated and can be chemically bonded to silicon hydroxyl groups in the sludge, thus enhancing adhesion force of the sludge. Besides, sodium silicate has effect of soil adhesion and curing, so that a water stabilizing aggregate is formed in interior. The structure releases heat and water under effect of quick lime, thus curing the sludge strongly. The curing agent also can fill the gaps in the sludge, thus improving sludge curing performance. The product solves the problem of poor curing performance ofsludge curing agents in the prior art.

Description

technical field [0001] The invention belongs to the technical field of curing agents, in particular to an environment-friendly curing agent for sludge. Background technique [0002] Sludge is a viscous substance produced in the process of sewage treatment. It is mainly composed of aerobic and anaerobic microorganisms. It is a complex mixture of organic matter, metals, germs, insect eggs, colloids, etc. For large urban sewage treatment plants and rivers and lakes in cities, due to the large amount of industrial wastewater discharged into the system, the sewage sludge contains a large number of microorganisms, pathogens, heavy metals and organic pollutants, and the water content is generally 80%. Above, if not handled properly, it will cause serious secondary pollution. At present, the treatment methods of sewage sludge are mainly agricultural use, incineration and landfill, and there is still a large amount of sewage sludge that has not undergone any treatment and is discar...

Claims

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Application Information

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IPC IPC(8): C04B28/26C02F11/00
CPCC02F11/008C04B28/26C04B2111/00017C04B7/02C04B14/104C04B22/144C04B22/064C04B2103/302C04B24/2652C04B22/148C04B18/04C04B14/202C04B18/08C04B22/10C04B22/066C04B18/18C04B18/0481C04B22/085C04B12/04C04B22/002
Inventor 胡次兵陈建春卢星
Owner FOSHAN CHANCHENG DISTRICT NUOGAO ENVIRONMENTAL PROTECTION TECH CO LTD
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