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Preparation method of magnetic nanoparticle modified activated sludge adsorbing agent

A technology of activated sludge adsorption and magnetic nanometer, applied in the field of adsorption, can solve the problems of low sludge sedimentation and separation capacity, easy sludge bulking, small processing capacity, etc., and achieves easy magnetic separation, improved resource utilization, and convenient recovery. Effect

Inactive Publication Date: 2017-01-25
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the biological treatment method is currently the most widely used water treatment technology, especially the activated sludge method is the most widely used, but there are low sludge settling and separation capacity, small treatment capacity per unit volume, loose sludge floc structure, and easy to produce Disadvantages such as sludge bulking

Method used

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  • Preparation method of magnetic nanoparticle modified activated sludge adsorbing agent
  • Preparation method of magnetic nanoparticle modified activated sludge adsorbing agent
  • Preparation method of magnetic nanoparticle modified activated sludge adsorbing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1 A kind of preparation method of magnetic nanomaterial modified activated sludge adsorbent

[0018] (1) Dry the activated sludge from the sewage treatment plant at 102°C, grind, and sieve with 80 meshes to obtain dry sludge;

[0019] (2) Dissolve 7 g of dry sludge powder in 70 mL of distilled water and heat in a water bath at 60 °C;

[0020] (3) 2.5 g FeCl 3 Dissolve in 180 mL of distilled water and heat in a water bath at 60°C to obtain FeCl 3 solution;

[0021] (4) 3 g FeSO 4 Dissolve in 22 mL of distilled water and heat in a water bath at 60°C to obtain FeSO 4 solution;

[0022] (5) FeCl 3 solution and FeSO 4 After the solution was mixed and stirred, it was poured into the stirred sludge. The three solutions were mixed and stirred in a water bath at 60°C for 25 minutes. The pH was adjusted to 10 with NaOH, and then stirred for 50 minutes. Washing and drying to obtain magnetic activated sludge.

Embodiment 2

[0023] Example 2 A preparation method of magnetic nanomaterial modified activated sludge adsorbent

[0024] (1) Dry the activated sludge from the sewage treatment plant at 105°C, grind, and sieve with 100 mesh to obtain dry sludge;

[0025] (2) Dissolve 9 g of dry sludge powder in 90 mL of distilled water and heat in a water bath at 70 °C;

[0026] (3) 3 g FeCl 3 Dissolve in 216 mL of distilled water and heat in a water bath at 70°C to obtain FeCl 3 solution;

[0027] (4) 3.6 g FeSO 4 Dissolve in 27 mL of distilled water and heat in a water bath at 70°C to obtain FeSO 4 solution;

[0028] (5) FeCl 3 solution and FeSO 4 After the solution was mixed and stirred, it was poured into the stirred sludge. The three solutions were mixed and stirred in a water bath at 70°C for 30 minutes. The pH was adjusted to 10 with NaOH, and then stirred for 60 minutes. Washing and drying to obtain magnetic activated sludge.

Embodiment 3

[0029] Embodiment 3 A kind of preparation method of magnetic nanomaterial modified activated sludge adsorbent

[0030] (1) Dry the activated sludge from the sewage treatment plant at 110°C, grind, and sieve with 150 mesh to obtain dry sludge;

[0031] (2) Dissolve 10 g of dry sludge powder in 100 mL of distilled water and heat in a water bath at 80 °C;

[0032] (3) 3.6 g FeCl 3 Dissolve in 260 mL of distilled water and heat in a water bath at 80°C to obtain FeCl 3 solution;

[0033] (4) 4 g FeSO 4 Dissolve in 30 mL of distilled water and heat in a water bath at 80°C to obtain FeSO 4 solution;

[0034] (5) FeCl 3 solution and FeSO 4 After the solution was mixed and stirred, it was poured into the stirred sludge. The three solutions were mixed and stirred in a water bath at 80°C for 45 minutes. The pH was adjusted to 10 with NaOH, and then stirred for 70 minutes. Washing and drying to obtain magnetic activated sludge.

[0035] Example 4 The weight percentage of Fe in th...

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Abstract

The invention provides a preparation method of a magnetic nanoparticle modified activated sludge adsorbing agent. Activated sludge is adopted as a raw material, and is magnetized by prepared nanoscale Fe3O4. The method which firstly adopts the magnetic activated sludge as the adsorbing agent is simple and easy to implement, low in cost and large in adsorption capacity, heavy metals in water can be effectively processed, the resource utilization of the activated sludge is realized, magnetic separation can be carried out easily, the convenience in recovery is realized, and secondary pollution cannot be caused during an adsorption process.

Description

technical field [0001] The invention relates to a preparation method of a magnetic nano-material modified activated sludge adsorbent, which belongs to the field of adsorption. Background technique [0002] With the rapid development of industry and the improvement of people's living standards, more and more industrial wastewater and domestic sewage are produced, and their treatment is facing severe challenges. Among them, the biological treatment method is currently the most widely used water treatment technology, especially the activated sludge method is the most widely used, but there are low sludge settling and separation capacity, small treatment capacity per unit volume, loose sludge floc structure, and easy to produce Disadvantages such as sludge bulking. In addition, sludge resource recycling has also become one of the problems that urgently need to be solved in our country. Therefore, exploring new ways of sludge resource utilization is of great significance to solv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28
CPCB01J20/24B01J20/0225B01J20/28009B01J2220/4887C02F1/286C02F2101/20
Inventor 李娜杜斌魏琴胡丽华魏东王晓东闫涛
Owner UNIV OF JINAN
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