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Resource utilization method of Fenton iron sludge

A technology of recycling and iron mud, applied in the field of recycling solid waste, can solve the problems of occupying land, polluting water bodies, destroying soil structure, etc.

Inactive Publication Date: 2013-08-21
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the Fenton oxidation method will produce a certain amount of chemical sludge during the treatment process. If it is not treated properly, it will cause many hazards, such as: occupying a large amount of land; Destroy the structure of the soil; directly discharge the silted riverbed and seriously pollute the water body; the sludge is oxidized and decomposed by microorganisms to release harmful gases, dust, etc., which will increase the pollution of the atmosphere; after a large amount of stacking, the sludge contains intestinal bacteria, parasites and Viruses, etc., seriously endanger human health

Method used

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  • Resource utilization method of Fenton iron sludge

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Raw materials: Fenton technology for advanced treatment of pulp and papermaking wastewater remaining iron sludge, Fe 2 o 3 The content is 53.2%, and the organic matter content is 28.5%.

[0025] Processing steps:

[0026] (1) Take the above-mentioned Fenton iron mud and concentrate to obtain 1m of chemical iron mud with a moisture content of 95.5% 3 According to the volume ratio of chemical iron slime: sulfuric acid = 10: 1, add industrial concentrated sulfuric acid with a mass concentration of 98%, and heat to 70°C, and fully stir for 30 minutes to form an iron slime solution;

[0027] (2) To the 1.1m obtained in step (1) 3 Add 24kg scrap iron filings to the iron slime solution for reduction, and after the reduction time is 70min, detect Fe with phenol solution 3+ , Fe 3+ is completely reduced to Fe 2+ , after the completion of static precipitation for 30 minutes, the supernatant was extracted, and the lower sediment was dehydrated and landfilled;

[0028] (3) A...

Embodiment 2

[0030] Raw materials: Fenton technology for advanced treatment of alcohol wastewater remaining iron sludge, Fe 2 o 3 The content is 55.8%, and the organic matter content is 25.4%.

[0031] Processing steps:

[0032] (1) Take the above-mentioned Fenton iron pollution and concentrate to obtain 1m of chemical iron sludge with a water content of 94.8% 3 According to the volume ratio of chemical iron sludge: sulfuric acid = 10: 1, add industrial concentrated sulfuric acid with a mass concentration of 98%, control the temperature at 75°C, and fully stir for 30 minutes to form an iron sludge solution;

[0033] (2) To the 1.1m obtained in step (1) 3 Add 22kg of waste iron filings to the iron slime solution for reduction. After reduction for 60 minutes, detect Fe with phenol solution. 3+ , Fe 3+ is completely reduced to Fe 2+ , after the completion of static precipitation for 30 minutes, the supernatant was extracted, and the lower sediment was dehydrated and landfilled;

[0034...

Embodiment 3

[0036] Raw materials: Fenton technology for advanced treatment of pharmaceutical wastewater remaining iron sludge, Fe 2 o 3 The content is 55.1%, and the organic matter content is 26.9%.

[0037] Processing steps:

[0038] (1) Take the above-mentioned Fenton iron mud and concentrate it to obtain 1m of chemical iron mud with a moisture content of 93.5%. 3 According to the volume ratio of chemical iron sludge: sulfuric acid = 10: 1, add industrial concentrated sulfuric acid with a mass concentration of 98%, control the temperature at 73°C, and fully stir for 30 minutes to form an iron sludge solution;

[0039] (2) To the 1.1m obtained in step (1) 3 Add 23kg of waste iron filings to the iron slime solution for reduction. After reduction for 65 minutes, detect Fe with phenol solution. 3+ , Fe 3+ is completely reduced to Fe 2+ , after the completion of static precipitation for 30 minutes, the supernatant was extracted, and the lower sediment was dehydrated and landfilled;

...

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Abstract

The invention discloses a resource utilization method of Fenton iron sludge. The method comprises the following steps of: (1) treating Fenton; adding the rest of ferrum into concentrated sulfuric acid; and controlling the temperature to be between 70 and 75 DEG C to stir for 30 minutes; (2) adding excessive quantities of scrap iron chips into an iron sludge solution obtained in the step (1) to reduce; detecting Fe3<+> by using a phenol solution until Fe<3+> is totally reduced into Fe<2+>; and (3) after the reduction is finished, standing for precipitating for 30 minutes; extracting supernate; adding ethanol according to the proportion that V(supernate) / V(ethanol) is equal to 10 to 1 and shortening the crystallizing time of ferrous sulfate; and after the crystallization is finished, obtaining an industrial FeSO4.7H2O finished product. According to the method, the bottle neck problem of Fenton technology promotion can be solved, the resource utilization of solid wastes is realized, and Fenton iron sludge is turned from waste into treasure, so that sustainable development of human society is facilitated.

Description

technical field [0001] The invention relates to the technical field of resource treatment of solid waste, in particular to a method for resource utilization of iron sludge produced by Fenton treatment technology. technical background [0002] Fe was discovered by French scientist H.J.Fenton in 1894 2+ Can pass H 2 o 2 It effectively catalyzes the oxidation of malic acid, and subsequent studies have shown that the combination of the two is an effective oxidant for many types of organic matter. To commemorate this great scientist, later generations will Fe 2+ and H 2 o 2 The composed reagent is named as Fenton's reagent, and the reaction using this reagent is called Fenton's reaction. In 1964, Canadian scholar H.R.Eisenhaner successfully applied Fenton reagent to wastewater treatment. In the past ten years of research, Fenton reagent has been successfully applied to the treatment of various industrial wastewater, and has become the most widely used wastewater advanced tr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00C01G49/14
Inventor 王双飞陈永利张娟
Owner GUANGXI UNIV
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