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Sludge degradation treatment method

A treatment method and sludge technology, applied in sludge treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of perishable odor, high organic content, restricted transportation and discharge, etc.

Active Publication Date: 2015-11-11
石家庄新奥环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Sludge is a complex heterogeneous body composed of organic debris, bacterial cells, inorganic particles, and colloids. Due to the sludge's high viscosity, high moisture content (above 80%), and high organic content And the characteristics of easy to rot and smell, in the process of sludge treatment, there are problems of difficult transportation and limited discharge
[0003] Therefore, it is urgent to find a sludge degradation treatment method to solve the problem of large amount of sludge, difficult to transport and limited discharge.

Method used

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specific Embodiment approach

[0053] Hereinafter, the embodiments of the present invention set up examples to illustrate the present invention. These embodiments are just examples for specifically illustrating the present invention, and those skilled in the art can understand that the scope of the present invention is not limited by these embodiments.

[0054] Wherein, it should be noted that in the following examples, the sludge to be treated is an example of industrial sludge, and the content of heavy metals in industrial sludge is usually high. Therefore, the obtained liquid product is discharged or used for Before sludge pulping, heavy metal stabilizers need to be added to fix heavy metals.

Embodiment 1

[0056] Embodiment 1 of the present invention provides a kind of sludge degradation treatment method, see figure 2 Shown:

[0057] Step 1) mixing the sludge to be treated with oxygen-enriched gas, and treating it under subcritical conditions;

[0058] Specifically: the sludge is pretreated to prepare a sludge slurry that can be pumped, and oxygen-enriched gas is added to the sludge slurry, wherein the mass of oxygen in the amount of oxygen-enriched gas added is 3 times the theoretical oxygen demand of the sludge %, treated under subcritical conditions (22MPa, 373°C).

[0059] Step 2) separating the treated product to obtain combustible gas products, liquid products and solid products;

[0060] Specifically: a combustible gas product, a solid product (water content 20%) and a liquid product are obtained through one-step separation, wherein the combustible gas product can be directly burned, and the heavy metal content in the liquid product is relatively high and cannot be use...

Embodiment 2

[0065] Embodiment 2 of the present invention provides a kind of sludge degradation treatment method, see image 3 Shown:

[0066] Step 1) adding a heavy metal stabilizer to the sludge to be treated, mixing it with oxygen-enriched gas, and treating it under subcritical conditions;

[0067] Specifically: add calcium hydroxide solids to the sludge to be treated, dissolve the solids by stirring, and prepare sludge slurry. The concentration of calcium hydroxide in the sludge slurry is 100g / L, and the sludge slurry The material is mixed with oxygen-enriched gas after pressurized and preheated, wherein the mass of oxygen in the amount of oxygen-enriched gas added is 30% of the chemical oxygen demand of the sludge raw material, and it is treated under subcritical conditions (9MPa, 280°C).

[0068] Step 2) separating the treated product to obtain combustible gas products, liquid products and solid products;

[0069] Specifically: a combustible gas product, a solid product (20% water ...

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Abstract

The invention relates to the field of sludge treatment, in particular to a sludge degradation treatment method. The method can degrade sludge to be combustible gas products, liquid products and solid products, the products are separately treated, and therefore large-scale treatment of the sludge is facilitated, and classified discharging after degradation is facilitated. The defects that in the prior art, sludge is difficult to transport, and large-scale treatment is inconvenient are overcome. According to the embodiment of the sludge degradation treatment method, the method includes the steps that step1, the sludge to be treated is mixed with enriched-oxygen gas, and the mixture is treated under the undercritical conditions; step2, the treated products are separated to obtain the combustible gas products, the liquid products and the solid products.

Description

technical field [0001] The invention relates to the field of sludge treatment, in particular to a sludge degradation treatment method. Background technique [0002] At present, the amount of urban sewage treatment in my country is increasing day by day, and the amount of sludge generated in the process of sewage treatment in my country exceeds 30 million tons every year. Sludge is a complex heterogeneous body composed of organic debris, bacterial cells, inorganic particles, and colloids. Due to the sludge's high viscosity, high moisture content (above 80%), and high organic content And the characteristics of easy to rot and smell, in the process of sludge treatment, there are problems of difficult transportation and limited discharge. [0003] Therefore, it is urgent to find a sludge degradation treatment method to solve the problems of large amount of sludge, difficulty in transportation and limited discharge. Contents of the invention [0004] The main purpose of the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00
Inventor 程乐明王青刘扬宋成才
Owner 石家庄新奥环保科技有限公司
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