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Advanced treatment method of industrial waste water by combining catalysis internal electrolysis, coupling, oxidization and flocculation

A technology for advanced treatment of industrial wastewater, applied in oxidation water/sewage treatment, flocculation/sedimentation water/sewage treatment, chemical instruments and methods, etc., can solve the problem of difficulty in meeting discharge standards, inability to continue to use biological treatment, and the danger of pollutants, etc. problems, to achieve the effect of reducing the cost of chemicals, excellent decolorization effect, and high removal effect

Inactive Publication Date: 2011-01-26
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004](2) There are many kinds of pollutants, and the concentration fluctuates greatly
(3) Pollution substances are highly toxic and harmful
(4) There are large differences in the migration and change laws of pollutants after discharge
Once discharged, the laws of migration and change are very different. Some are deposited on the bottom of the water, some volatilize and enter the atmosphere, some are enriched in organisms, and some are decomposed and transformed into other substances, and even cause secondary pollution, making the pollutants more powerful. great danger
(5) Recovery is more difficult
[0005]Common industrial wastewater that is difficult to meet the "Integrated Wastewater Discharge Standard" after biochemical treatment includes papermaking wastewater, coking wastewater, printing and dyeing wastewater, etc. These wastewater are treated by various combined processes Finally, the CODCr value is 200-300mg / L, the chroma is between 100-400 times, it is still difficult to meet the emission standard, and the CODCr / BOD 5 <0.2, poor biodegradability, cannot continue to use biological treatment

Method used

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  • Advanced treatment method of industrial waste water by combining catalysis internal electrolysis, coupling, oxidization and flocculation
  • Advanced treatment method of industrial waste water by combining catalysis internal electrolysis, coupling, oxidization and flocculation
  • Advanced treatment method of industrial waste water by combining catalysis internal electrolysis, coupling, oxidization and flocculation

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Please see the process figure 1 .

[0027] 1. To biochemical effluent (COD) from a paper mill Cr 290mg / L, chroma about 220 times), add a certain amount of waste acid solution into the wastewater, stir, and adjust the pH value of the wastewater to about 5.

[0028] 2. Add the self-made Pall ring packing into the wastewater in the same shape as the national standard Pall ring packing. The Pall ring packing is composed of Pall ring packing with an iron-carbon volume ratio of 1:1. Add filler according to the ratio of 10 fillers / L wastewater, and aerate for 2 hours to produce water;

[0029] 3. According to the configuration of slaked lime: hydrogen peroxide solution (mass fraction is 30%): water = 2:1:17 (mass ratio), after stirring evenly, a mixed solution is obtained, and the mixed solution is added to the internal electrolytic aeration. For the wastewater effluent, the dosage of the mixed solution shall be subject to the pH value of the effluent reaching 8-9;

[0030...

Embodiment 3

[0037] The operation process of Example 1 was applied to treat the biochemical effluent of industrial sewage, and the experimental water was taken from the biochemical effluent of a certain printing and dyeing factory. Compare the catalytic internal electrolysis coupling oxidation flocculation method of the present invention with the addition of conventional flocculants, see Figure 4 shown.

[0038] The water quality of the biochemical effluent in the printing and dyeing plant is: COD Cr It is 220mg / L, and the chromaticity is 300 times. Catalyzed internal electrolysis coupling oxidation flocculation is used for advanced treatment, while the treatment efficiency of conventional chemicals (PAC and aluminum sulfate) is compared at the same time. The coagulation test was carried out under the condition of the optimal dosage of conventional chemicals, and 0.5mg / L polyacrylamide coagulant was added. The results are compared as follows:

[0039] COD of printing and dyeing wastewat...

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Abstract

The invention discloses an advanced treatment method of industrial waste water by combining catalysis internal electrolysis, coupling, oxidization and flocculation, which relates to the technology of the advanced treatment of industrial waste water. The method comprises the following steps of adjusting the pH value of the biologically treated industrial waste water with CODCr of 200 to 300 mg / L and chroma of 100 to 400 times to be 5, then adding iron and carbon (the volume rate is 1:1) Pall ring filling, and aerating for two hours; filling the mixed solution of white lime, 30% peroxide solution and water in the mass rate of 2:1:17 to adjust the pH value of the waste water to be 8 to 9; adding anion polyacrylamide so that the content of PAM in the waste water is kept to be about 0.5ppm, standing and depositing for 30min after stirring the waste water with water force for 15min, and measuring and making sure that the CODCr of the supernatant liquor is less than 100mg / L and the chrom is less than 50 times, and then discharging water which reaches the national primary standard Synthetical Draining Standard of Sewage. The invention is completed by the synergistic effect of catalysis internal electrolysis, oxidization and flocculation, has the advantages of high treating efficiency, short staying time of water force, fast sedimentation of sewage, less sewage production and low operation cost, and is widely suitable for the advanced treatment of different industrial waste water.

Description

technical field [0001] The invention discloses a method for advanced treatment of industrial wastewater by coupling oxidation flocculation with catalytic internal electrolysis, and relates to a technology of coupled oxidation flocculation with catalytic internal electrolysis and a new method for advanced treatment of industrial wastewater. Background technique [0002] Due to the rapid development of industry, the amount of water and water quality pollution of industrial wastewater is very large. It is the most important source of pollution and has the following characteristics: [0003] (1) The discharge volume is large, the pollution range is wide, and the discharge method is complicated. Industrial production consumes a lot of water, and a considerable part of the production water is discharged out of the factory with raw materials, intermediate products, by-products and end products. Industrial enterprises spread all over the country, and the scope of pollution is wide....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06C02F1/461C02F1/72C02F1/56
Inventor 潘碌亭余波王文蕾吴锦峰
Owner TONGJI UNIV
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