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Preparing method of compound adsorbing material

A composite adsorption material and sludge technology, applied in separation methods, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve problems such as occupying large land, safety, secondary pollution, etc., to improve the environment and broaden the range of raw materials , good adsorption effect

Active Publication Date: 2017-01-11
HEFEI BAIHE ENVIRONMENTAL PROTECTION TECH CO LTD
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Problems solved by technology

[0007] As far as the commonly used residual activated sludge treatment methods are concerned, sanitary landfill is the most widely used, but sanitary landfill needs to occupy a large amount of land, and if the leachate and landfill gas generated after landfill are not handled properly, it is easy to cause secondary pollution. secondary pollution and safety issues

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  • Preparing method of compound adsorbing material
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  • Preparing method of compound adsorbing material

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preparation example Construction

[0024] The invention provides a kind of preparation method of composite adsorption material, comprises the following steps:

[0025] a), the remaining activated sludge is dried to obtain the dried sludge;

[0026] b), the dried sludge is thermally cracked in a protective gas atmosphere to obtain a composite adsorption material;

[0027] The thermal cracking temperature is 500-800°C.

[0028] In the method provided by the invention, the remaining activated sludge is firstly dried. Wherein, the excess activated sludge (excess activated sludge) is the activated sludge discharged out of the system from the secondary sedimentation tank (or sedimentation area) in the activated sludge system of the sewage treatment plant. In one embodiment provided by the present invention, the excess activated sludge is the sludge discharged from the secondary settling tank after the sewage has undergone sedimentation in the primary settling tank, biochemical treatment in the aeration tank, and se...

Embodiment 1

[0037] Take 1 part of 200.0g of residual activated sludge from Hefei Wangtang Sewage Plant, and process the obtained activated sludge according to the following steps:

[0038] First, the fresh excess activated sludge is simply compressed into activated sludge with a water content of 75% by compression; then, the compressed activated sludge is dried at 110°C for 50 minutes, and nitrogen is used as a protective gas during the process; after that , the dried sludge was pyrolyzed at 600°C for 30 minutes, using nitrogen as a protective gas during the process; after pyrolysis, the product was cooled to 200°C and taken out to obtain 23.9g of composite adsorption material.

Embodiment 2

[0040] Take 1 part of 200.0g of residual activated sludge from Hefei Wangtang Sewage Plant, and process the obtained activated sludge according to the following steps:

[0041] First, the fresh excess activated sludge is simply compressed into activated sludge with a water content of 80% by compression; then, the compressed activated sludge is baked at 160°C for 30 minutes, and nitrogen is used as a protective gas during the process; after that , the dried sludge was pyrolyzed at 650°C for 50 minutes, and nitrogen was used as a protective gas during the process; after the pyrolysis was completed, the product was cooled to 200°C and taken out to obtain 23.4g of composite adsorption material.

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Abstract

The invention belongs to the field of environmental protection, and particularly relates to a preparing method of a compound adsorbing material, which comprises the following steps: drying remaining active sludge, and then obtaining the dried sludge; conducting thermal cracking of the dried sludge in the environment of protective gas and then obtaining the compound adsorbing material, wherein the temperature for thermal cracking is 500-800 DEG C. Under the process of thermal cracking in high temperature, pathogens and persistent organism in the sludge are charred, heavy metals are solidified, consequently requirement of 'hazard free' can be met. The compound adsorbing material has a good adsorbing effect on harmful gases such as sulfuretted hydrogen, sulfur dioxide, nitric oxide, drugs in waste water(especially antibiotics), volatile cancerigenic organic compounds, N-nitrosamine, and phosphate. The compound adsorbing material can be used for disposing sewage or harmful gases, improving environment, and turning waste into wealth, not only broadening the scope of materials for preparing the compound adsorbing material but also realizing the integration of sludge harmfulness and resource utilization.

Description

technical field [0001] The invention belongs to the field of environmental protection, and in particular relates to a preparation method of a composite adsorption material. Background technique [0002] Adsorption material is a kind of material that has special pore structure, large specific surface area and other characteristics, and has strong adsorption performance for certain substances due to physical or chemical effects, so as to realize the separation of substances. Adsorbent materials are widely used in petrochemical, chemical, pharmaceutical, food, environmental protection and other fields. Common adsorption materials include activated carbon, silica gel, activated alumina, molecular sieve, etc., among which activated carbon is the most commonly used active adsorption material. [0003] At present, the raw materials for activated carbon production mainly include wood, coal, coconut shell, etc. These raw materials have certain limitations. Renewable resources, and ...

Claims

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Application Information

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IPC IPC(8): B01J20/30C02F11/18C02F11/10C02F11/00B01D53/02C02F1/28C02F101/30C02F101/32C02F101/38
CPCB01D53/02B01D2257/302B01D2257/304B01D2257/40B01J20/02B01J20/20C02F1/283C02F11/008C02F11/10C02F11/18C02F2101/30C02F2101/322C02F2101/38
Inventor 何鑫
Owner HEFEI BAIHE ENVIRONMENTAL PROTECTION TECH CO LTD
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