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Mixed sludge-based adsorbing material for treating dyestuff waste water

A technology of mixing sludge and adsorption materials, applied in the direction of carbon compounds, other chemical processes, chemical instruments and methods, etc., can solve the problems of few research reports, and achieve the effect of solving the resource utilization and improving the adsorption and decolorization performance.

Inactive Publication Date: 2018-06-22
张慕风
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Co-processing of pickling sludge and sewage sludge has good application prospects in terms of the utilization rate of pickling sludge and sewage sludge, environmental safety and saving natural iron ore resources, but the current research reports in this area rare

Method used

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  • Mixed sludge-based adsorbing material for treating dyestuff waste water
  • Mixed sludge-based adsorbing material for treating dyestuff waste water
  • Mixed sludge-based adsorbing material for treating dyestuff waste water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] ① Pretreatment

[0025] Dry the pickling sludge and sewage sludge separately to make the water content 40wt%, grind to a particle size of 0.1mm, and then press the mass ratio of the dry weight of the pickling sludge to the dry weight of the sewage sludge to be 1:1 mix;

[0026] ②Carbonization

[0027] Put the mixed solids of pickling sludge and sewage sludge pretreated in step ① into a tube furnace for carbonization at 200°C, use nitrogen atmosphere, nitrogen flow rate is 100L / h, and carbonize for 40min to obtain carbonized material;

[0028] ③Activation

[0029] Then place the carbonized material prepared in step ② into an activation furnace at 200°C for activation, and use steam with a flow rate of 100 L / h to activate for 1.5 h to obtain a mixed sludge-based adsorption material for wastewater treatment.

[0030] The mixed sludge-based adsorption material of embodiment 1 is used for the detection step of decolorization effect in waste water as follows:

[0031] ① P...

Embodiment 2

[0045] ① Pretreatment

[0046] Dry the pickling sludge and sewage sludge separately to make the water content 40wt%, grind to a particle size of 0.1mm, and then press the mass ratio of the dry weight of the pickling sludge to the dry weight of the sewage sludge to be 1:3 mix;

[0047] ②Carbonization

[0048] Put the mixed solids of pickling sludge and sewage sludge pretreated in step ① into a tube furnace for carbonization at 400°C, use nitrogen atmosphere, nitrogen flow rate is 40L / h, and carbonize for 30min to obtain carbonized material;

[0049] ③ activation

[0050] Then put the carbonized material prepared in step ② into an activation furnace at 400°C for activation, and use steam with a flow rate of 50 L / h to activate for 1 hour to obtain a mixed sludge-based adsorption material for wastewater treatment.

[0051] figure 1 It is the scanning electron microscope topography figure of embodiment 2 mixed sludge base adsorption material, by figure 1 It can be seen that th...

Embodiment 3

[0065] ① Pretreatment

[0066]Dry the pickling sludge and sewage sludge respectively to make the water content 40wt%, grind to a particle size of 0.1mm, and then press the mass ratio of the dry weight of the pickling sludge to the dry weight of the sewage sludge to be 1:5 mix;

[0067] ②Carbonization

[0068] Put the mixed solids of pickling sludge and sewage sludge pretreated in step ① into a tube furnace for carbonization at 600°C, use nitrogen atmosphere, nitrogen flow rate is 10L / h, and carbonize for 20min to obtain carbonized material;

[0069] ③Activation

[0070] Then put the carbonized material prepared in step ② into an activation furnace at 600°C for activation, and use steam with a flow rate of 10 L / h to activate for 30 minutes to obtain a mixed sludge-based adsorption material for wastewater treatment.

[0071] The detection steps of the decolorization effect of the mixed sludge-based adsorption material on wastewater in Example 3 are the same as in Example 1, a...

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Abstract

The invention discloses a mixed sludge-based adsorbing material for treating dyestuff waste water. The mixed sludge-based adsorbing material is prepared by the following steps: respectively drying pickling sludge and sewage sludge to keep the water content lower than 40wt%, grinding till the particle diameter is 0.1mm, then mixing the pickling sludge and the sewage sludge according to the mass ratio of the dry weight of (1 to 1) to (1 to 5), then carrying out carbonization under the atmosphere of nitrogen gas and at the temperature of 200-600 DEG C, then activating the carbonized mixture at the temperature of 200-600 DEG C and obtaining the mixed sludge-based adsorbing material. The mixed sludge-based adsorbing material disclosed by the invention has the beneficial effects that the pickling sludge and the sewage sludge are utilized for the first time to prepare the adsorbing material, so that not only is the problem about recycling of the picking sludge and the sewage sludge is solved,but also the adsorbing and decoloring properties of the sludge active carbon for the actual dyestuff waste water are improved. Compared with the decoloring rate of the existing sludge active carbon,the decoloring rate of the mixed sludge-based adsorbing material is increased from 25.61%-34.89% to 63.53%-98.98%.

Description

technical field [0001] The invention relates to the treatment of waste water, steel pickling sludge and sewage sludge, in particular to a method for preparing mixed sludge-based adsorption materials from steel pickling sludge and sewage sludge. Background technique [0002] The pickling process in steel products processing plants produces a large amount of pickling wastewater. In order to protect the environment, save and rationally utilize resources, scholars at home and abroad have conducted some research on the treatment of pickling wastewater, mainly using direct roasting, acid separation and oxidation neutralization methods to recover iron resources in pickling wastewater. At present, some iron and steel enterprises still use traditional treatment methods, that is, generally use lime, calcium carbide slag or calcium hydroxide to neutralize them, and produce a large amount of sludge at the same time, and the generated sludge is difficult to reprocess and takes up a lot o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/324C01B32/336B01J20/20
CPCB01J20/20
Inventor 张慕风范晓丹张襄楷
Owner 张慕风