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Preparation method of sludge carbon-based material and sludge carbon-based material

A base material, sludge charcoal technology, applied in water/sludge/sewage treatment, chemical instruments and methods, water pollutants, etc. The effect of utilizing, increasing the utilization rate of waste, and simple process

Inactive Publication Date: 2018-11-16
北京环球中科水务科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These treatment methods often have the disadvantages of occupying a large amount of land, polluting the air and groundwater. With the enhancement of people's environmental protection awareness and the improvement of environmental protection standards, the traditional sludge treatment methods can no longer meet the requirements of urban green development. The resource utilization is an inevitable choice to solve the sludge hoarding
Although there are some environmentally friendly chemical sludge treatment methods, most of the treated sludge cannot be reused

Method used

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  • Preparation method of sludge carbon-based material and sludge carbon-based material
  • Preparation method of sludge carbon-based material and sludge carbon-based material
  • Preparation method of sludge carbon-based material and sludge carbon-based material

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preparation example Construction

[0028] The present invention proposes a kind of preparation method of sludge carbon base material, comprises the following steps:

[0029] 1) mixing the sludge with the heavy metal wastewater, wherein the heavy metal salt content in the heavy metal wastewater is 100-1200 mg / L, stirring for a period of time to form a sludge mixture;

[0030] 2) filtering the sludge mixture, so that the sludge in the sludge aqueous solution is separated to obtain dehydrated sludge;

[0031] 3) Drying the dehydrated sludge: put the dehydrated sludge into a drying device, and heat and dry at 105° C. to obtain dried sludge;

[0032] 4) Carry out high-temperature carbonization treatment on the dried sludge, and grind and sieve the high-temperature carbonized product to form a powdery sludge carbon-based material.

[0033] Wherein, the heavy metal wastewater in step 1) is laboratory simulated wastewater containing heavy metal salts, wherein the heavy metal salts are copper nitrate, nickel nitrate, c...

example 1

[0041]The laboratory simulated the preparation of heavy metal wastewater containing copper ions or nickel ions. Under the conditions of 200rpm / min and 180min, it was stirred and mixed with the sludge and then filtered, and the content of copper ions or nickel ions in the sludge system before and after the reaction was measured by inductively coupled plasma mass spectrometry. The results showed that the content of copper ions or nickel ions in the system after the heavy metal wastewater was mixed with sludge was 800 mg / L, and the content of copper ions and nickel ions in the filtrate decreased to 6.660 mg / L and 4.326 mg / L respectively after the reaction, and the removal efficiency 99.168% and 99.495% respectively, the heavy metal ions copper ions and nickel ions added in the system have been effectively adsorbed by the sludge. Such as figure 1 As shown in the transmission electron microscope image after the activated sludge adsorbs copper ions or nickel ions, the morphology of...

example 2

[0043] The laboratory simulates the preparation of copper ion or nickel ion heavy metal wastewater. The wastewater and sludge are mixed and stirred for a period of time and then filtered to separate the mud and water in the sludge aqueous solution; the dehydrated sludge is dried to obtain a dry Sludge: subject the dried sludge to high-temperature carbonization treatment, and grind and sieve the high-temperature carbonized product to obtain a powdery sludge carbon-based material; the specific operation is the same as the foregoing. The appearance of the transmission electron microscope of the sludge carbon-based material prepared by copper ion and nickel ion catalysis is as follows: figure 2 As shown, the carbonized heavy metal activated sludge forms porous carbon-based metal functional materials. Determine its specific surface area as image 3 with Figure 4 , the specific surface area of ​​the sludge carbon-based material prepared by using copper ions and nickel ions to ca...

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Abstract

The invention discloses a preparation method of a sludge carbon-based material and the sludge carbon-based material. A heavy metal catalysis method is adopted, civil sludge is taken as a carbon sourceprecursor, heavy metal ions in wastewater are taken as a catalyst, the sludge carbon-based material is prepared from the sludge through a series of physiochemical processes such as suction filtration, drying, carbonization and the like, the process is simple, and industrial application prospect is realized. On the basis of the ideas of turning waste into wealth and realizing recycling, heavy metal in the wastewater is removed by the sludge, further, the sludge carbon-based material is prepared from the sludge with the heavy metal adsorbed, has functions of adsorption and Fenton catalysis andcan be reused in a water treatment process, waste is dealt with waste, and recycling is realized.

Description

technical field [0001] The invention relates to the field of treatment and reuse of sewage sludge, and more specifically, relates to a method for preparing a sludge carbon-based material and the sludge carbon-based material. Background technique [0002] With the continuous improvement of my country's urbanization level, the construction of sewage treatment facilities has developed rapidly. In the process of urban sewage treatment, the sewage can be discharged up to the standard after a series of treatments, and a large number of pollutants are enriched, concentrated and transferred to the sludge. Sludge is the most important by-product of sewage biological treatment, and it is also considered to be one of the main sources of secondary pollution of water environment. Sludge from urban sewage treatment plants not only has high water content, is perishable and has a strong odor, but also contains a large number of toxic, harmful and carcinogenic substances such as pathogenic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/324B01J20/20B01J20/30C02F1/28C02F1/72
CPCB01J20/20B01J20/3085B01J2220/4887C01B32/324C02F1/283C02F1/725C02F2101/20C02F2305/026
Inventor 虞红波张伟军杨招艺李丹丹艾靖
Owner 北京环球中科水务科技股份有限公司
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