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Method for harmlessly treating municipal sludge

A technology for harmless treatment of municipal sludge, applied in sludge treatment, water/sludge/sewage treatment, dehydration/drying/concentrated sludge treatment, etc., can solve the problem of high cost, unsatisfactory treatment effect and energy consumption Advanced problems, to achieve the effect of low cost, significant cost-efficiency advantages, and low energy consumption

Active Publication Date: 2018-03-23
中原环保郑州污泥新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention provides a harmless treatment method for municipal sludge, aiming to solve the problems of high energy consumption, high cost and unsatisfactory treatment effect in the existing sludge treatment method

Method used

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  • Method for harmlessly treating municipal sludge

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Effect test

Embodiment 1

[0030] Embodiment 1: a kind of municipal sludge harmless treatment method comprises the following steps:

[0031] (1) Sludge conditioning: discharge the sludge to be treated into the conditioning tank, add the compound conditioner to it and stir; the amount of the compound conditioner added is 1% of the mass of the absolute dry sludge based on the amount of absolute dry sludge %.

[0032] The composite conditioner is made of the following raw materials in parts by weight: 30 parts of cetyltrimethylammonium chloride, 2 parts of guar gum hydroxypropyltrimethylammonium chloride, 10 parts of zeolite powder, and 0.1 part of citric acid , 58 parts of water; wherein the particle size of the zeolite powder is 300 mesh.

[0033] The preparation method of this composite conditioner is:

[0034] A. Dissolve cetyltrimethylammonium chloride in water, add zeolite powder, and stir for 2 hours at a temperature of 60°C;

[0035] B. add guar gum hydroxypropyl trimethylammonium chloride in th...

Embodiment 2

[0041] Embodiment 2: a kind of municipal sludge harmless treatment method, the difference with embodiment 1 is that the composite conditioner used is made of the following raw materials in parts by weight: cetyltrimethylammonium chloride 25 3 parts of guar gum hydroxypropyltrimethylammonium chloride, 12 parts of zeolite powder, 0.2 parts of citric acid, and 60 parts of water. The addition amount of the composite conditioner is 2% of the absolute dry sludge mass.

Embodiment 3

[0042] Embodiment 3: A kind of municipal sludge harmless treatment method, the difference from embodiment 1 is that the compound conditioner used is made of the following raw materials in parts by weight: cetyltrimethylammonium chloride 35 1.5 parts of guar gum hydroxypropyltrimethylammonium chloride, 8 parts of zeolite powder, 0.15 parts of citric acid, and 55 parts of water. The addition amount of the composite conditioner is 0.5% of the absolute dry sludge mass.

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Abstract

The invention discloses a method for harmlessly treating municipal sludge. The method includes conditioning the sludge; carrying out plate-frame pressure filtration; carrying out low-temperature drying by the aid of heat pumps. Dried sludge treated by the aid of the method can be used for preparing fertilizers or fuel; composite conditioners for conditioning the sludge comprise, by weight, 25-35 parts of dodecyl trimethyl ammonium chloride or hexadecyl trimethyl ammonium chloride, 1-3 parts of guar gum hydroxypropyl trimethyl ammonium chloride, 8-12 parts of zeolite powder or bentonite, 0.1-0.2 part of citric acid and 55-65 parts of water; the addition of the composite conditioners accounts for 0.5%-2% of the absolute dry sludge weight. The method has the advantages that the method is lowin cost and high in efficiency and is low in energy consumption and free of pollution in treatment procedures, the sludge treated by the aid of the method can be used as a fertilizer and auxiliary fuel, accordingly, the sludge can be harmlessly treated, and the method has a high popularization value.

Description

technical field [0001] The invention relates to the technical field of sludge treatment, in particular to a method for harmless treatment of municipal sludge. Background technique [0002] Sludge is a viscous substance produced in the process of sewage treatment, which contains a large number of fungi, filaments, intercellular substance, microorganisms, heavy metals, and inorganic substances, and the microorganisms in it are mainly aerobic and anaerobic microorganisms. , has the characteristics of high organic matter content and close combination with water body. The extremely high water content makes the sludge occupy a huge volume. At present, the national sludge production exceeds 20 million tons, and only 30% of the sludge is safely disposed of. A large amount of sludge is directly landfilled, which not only seriously pollutes the environment, but also occupies a large amount of land resources. Therefore, the problem of sludge harmless treatment needs to be solved urgen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/14C02F11/12C05F7/00C10L5/46F25B30/00
CPCC02F11/12C02F11/122C02F11/14C05F7/00C10L5/46F25B30/00Y02A40/20Y02E50/10Y02E50/30Y02P20/129
Inventor 杜莉莉杨洪亮张聪米昌斌于明吴建甫王朝伟
Owner 中原环保郑州污泥新材料科技有限公司
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