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A method for advanced treatment of wastewater by multidimensional composite catalytic oxidation

A technology of catalytic oxidation and advanced treatment, applied in the fields of oxidized water/sewage treatment, chemical instruments and methods, special compound water treatment, etc., to achieve the effect of reducing the problem of color reversion, easy availability of raw materials and low price

Active Publication Date: 2018-02-27
杭州绿夏环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the method provided by the comparison document solves the problem of harsh reaction conditions for the Fenton reaction, there is still a lot of room for improvement in the efficiency and effect of wastewater treatment

Method used

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  • A method for advanced treatment of wastewater by multidimensional composite catalytic oxidation
  • A method for advanced treatment of wastewater by multidimensional composite catalytic oxidation
  • A method for advanced treatment of wastewater by multidimensional composite catalytic oxidation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) adding dilute nitric acid and urea to pseudo-boehmite dry rubber powder, and stirring at a high speed for 5 hours to obtain an aluminum sol with a solid mass fraction of 21%;

[0034] (2) According to parts by weight, immerse 110 parts of porous ceramics in the prepared aluminum sol for 1 minute, blow off the excess sol in the pores of the ceramics with compressed air after taking it out, and then place the porous ceramics at 32° C. to dry in the shade for 6 hours, Dry in an oven at 11°C for 6 hours, and finally bake in a muffle furnace at 600°C for 2 hours to obtain 8 parts of alumina;

[0035] (3) according to parts by weight, TiO 2 12 parts, CuFe 2 o 4 10 parts, 14 parts of iron filings and 1 part of activated carbon were filled into 2 / 3 of the pores of the ceramic, and fired in a muffle furnace at 600°C for 3 hours. After cooling, 7 parts of calcium oxalate were filled into the remaining 1 / 3 of the pores of the ceramic, pressed Just do it.

Embodiment 2

[0037] (1) adding dilute nitric acid and urea to pseudo-boehmite dry rubber powder, and stirring at a high speed for 5 hours to obtain an aluminum sol with a solid mass fraction of 21%;

[0038] (2) According to parts by weight, immerse 100 parts of porous ceramics in the prepared aluminum sol for 1 minute, blow off the excess sol in the pores of the ceramics with compressed air after taking it out, and then place the porous ceramics at 32°C to dry in the shade for 6 hours, Dry in an oven at 11°C for 6 hours, and finally bake in a muffle furnace at 600°C for 2 hours to obtain 5 parts of alumina;

[0039] (3) according to parts by weight, TiO 2 20 parts, CuFe 2 o 4 9 parts, 13 parts of iron filings and 3 parts of activated carbon were filled into 2 / 3 of the pores of the ceramic, and fired in a muffle furnace at 600°C for 3 hours. After cooling, 6 parts of calcium oxalate were filled into the remaining 1 / 3 of the pores of the ceramic, pressed Just do it.

Embodiment 3

[0041] (1) adding dilute nitric acid and urea to pseudo-boehmite dry rubber powder, and stirring at a high speed for 5 hours to obtain an aluminum sol with a solid mass fraction of 21%;

[0042] (2) According to parts by weight, immerse 105 parts of porous ceramics in the prepared aluminum sol for 1 minute, blow off the excess sol in the pores of the ceramics with compressed air after taking it out, and then place the porous ceramics at 32° C. to dry in the shade for 6 hours, Dry in an oven at 11°C for 6 hours, and finally bake in a muffle furnace at 600°C for 2 hours to obtain 7 parts of alumina;

[0043] (3) according to parts by weight, TiO 2 10 parts, CuFe 2 o 4 8 parts, 12 parts of iron filings and 2 parts of activated carbon were filled into 2 / 3 of the pores of the ceramic, and fired in a muffle furnace at 600°C for 3 hours. After cooling, 5 parts of calcium oxalate were filled into the remaining 1 / 3 of the pores of the ceramic, pressed Just do it.

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Abstract

The invention discloses a method used for multidimensional composite catalytic oxidation advanced treatment of wastewater. The method comprises following steps: (1) wastewater is delivered into a multidimensional composite catalytic oxidation reactor, a catalyst bed is arranged in the multidimensional composite catalytic oxidation reactor, H2O2 solution and FeSO4 are delivered into the multidimensional composite catalytic oxidation reactor under light irradiation, aeration oxygen supply is carried out, and retention time is controlled to be 5 to 20min; (2) wastewater is delivered into a post-reaction tank from the multidimensional composite catalytic oxidation reactor, and retention time is controlled to be 2h; (3) wastewater is delivered into a sedimentation basin from the post-reaction tank, liquid caustic soda is added for adjusting pH value, a chroma adsorbent and a coagulant aid are added, and standing sedimentation is carried out; and (4) a supernate of the sedimentation basin is delivered into a clean-water reservoir, and bottom thickened sludge is discharged into a sludge tank under gravity action. Beneficial effects are that: the method is capable of generating .OH at oxidation stage without adjusting pH value, reducing CODcr which is difficult to biodegrade, chromaticity, and total phosphorus index, reducing drugs dose, and at the same time improving wastewater treatment effect and efficiency.

Description

technical field [0001] The invention relates to a method for advanced treatment of wastewater, more specifically, it relates to a method for advanced treatment of wastewater by multidimensional composite catalytic oxidation. Background technique [0002] China is one of the countries with the most serious water pollution in the world. As many as 70% of the country's rivers, lakes and reservoirs are affected, and the main source of water pollution is industrial production. At present, the most widely used method in wastewater treatment is biological treatment, which has the advantages of high removal efficiency and low operating cost. [0003] Reference document 201010529373.X discloses a method for advanced treatment of wastewater by four-phase catalytic oxidation, which integrates solid, liquid, gas, and micro-electric four-phase multi-in-one. By controlling various reaction conditions (such as alloy micro-electromagnetic field, chemical concentration, Reaction intensity, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/30C02F1/72C02F1/28C02F1/56
CPCC02F1/283C02F1/30C02F1/56C02F1/722C02F2001/007C02F2209/08C02F2305/02C02F2305/10
Inventor 朱春焰
Owner 杭州绿夏环境科技有限公司
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