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Recycling treatment method for saliferous organic waste water

A treatment method and technology for organic wastewater, applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc. and other problems, to achieve the effect of being suitable for continuous production, reducing the degree of corrosion and reducing the COD value

Active Publication Date: 2015-11-11
ZHEJIANG QICAI ECO TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Salt organic waste water, such as T acid separation mother liquor or H acid separation mother liquor, J acid waste water, DSD acid waste water, etc. in the H acid synthesis process, has high organic concentration, high toxicity, and high salt content. Existing conventional water treatment methods The ideal treatment effect cannot be achieved, so the present invention has invented an efficient and resource-based treatment method for saline organic wastewater through in-depth research on saline organic wastewater

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The isolated mother liquor of T acid produced in the H acid synthesis process was analyzed, the raw water was black, the pH value was 2, and the COD was 26030mg / L.

[0039] (1) Electrodialysis: Electrodialysis is used to separate the T-acid segregation mother liquor produced in the H-acid synthesis process, the voltage of the monolithic membrane is 1.5V, and the current density is 600A / m 2 , the temperature is 40°C, and after 100 minutes of treatment, an aqueous solution containing salt and acid, and organic wastewater containing organic matter are obtained.

[0040]The salt content in the organic wastewater is reduced to 1250mg / L; based on the quality of the aqueous solution, the salt content of the aqueous solution is 13%, and the COD is 736mg / L.

[0041] (2) Neutralization and concentration: add lime to the aqueous solution for neutralization reaction, filter to remove calcium sulfate, and obtain sodium sulfate solution; then carry out MVR evaporation and concentrati...

Embodiment 2

[0045] The isolated mother liquor of T acid produced in the H acid synthesis process was analyzed, the raw water was black, the pH value was 2, and the COD was 26030mg / L.

[0046] (1) Electrodialysis: Electrodialysis is used to separate the T acid isolation mother liquor produced in the H acid synthesis process, the voltage of the monolithic membrane is 1.5V, and the current density is 200A / m 2 , the temperature is 40°C, and after 100 minutes of treatment, organic waste water containing organic matter, and an aqueous solution containing salt and acid are obtained.

[0047] The salt content in the organic wastewater was reduced to 1596mg / L; based on the quality of the aqueous solution, the salt content of the aqueous solution was 12%, and the COD was 928mg / L.

[0048] (2) Neutralization and concentration: add lime to the aqueous solution for neutralization reaction, filter to remove calcium sulfate, and obtain sodium sulfate solution; then carry out MVR evaporation and concentr...

Embodiment 3

[0052] Adopt the T acid isolated mother liquor that produces in the H acid synthesis process identical with embodiment 1 to process.

[0053] Compared with embodiment 1, except that step (3) is different, all the other steps are the same.

[0054] Step (3) is: carry out wet oxidation to the organic wastewater in step (1), with CuSO 4 ·5H 2 O is a catalyst, taking the quality of organic wastewater as a benchmark, the amount of catalyst added is 0.9%, the temperature is 250°C, the oxygen partial pressure is 2.8MPa, the pH value of organic wastewater is 7, and after 110min of reaction; the quality of organic wastewater is As a standard, add 0.3% activated carbon to the organic wastewater, stir and adsorb for 30 minutes; after filtration, add 0.4% activated carbon for decolorization and adsorption, absorb for 30 minutes, and filter to obtain the effluent filtrate.

[0055] The COD in the filtrate is 345mg / L, the salt content is 945mg / L, and the COD removal rate reaches 99%.

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Abstract

The invention discloses a recycling treatment method for saliferous organic waste water. The method includes the steps that an electrodialysis method is adopted to treat the saliferous organic waste water to obtain organic waste water and a saliferous and acidiferous aqueous solution or a saliferous and alkaliferous aqueous solution; the aqueous solution in the step 1 is neutralized to remove acid or alkali so as to obtain a salt solution, and the salt solution is concentrated to recover salts; the organic waste water in the step 1 is subjected to wet oxidation treatment and then filtered to obtain effluent filter liquor. The method can obviously reduce the COD value in the waste water, and effectively recover and recycle substances in the waste water, wherein the COD removal rate is over 96%.

Description

technical field [0001] The invention relates to the technical field of waste water treatment and the field of process improvement, in particular to a resource treatment method for saline organic waste water. Background technique [0002] As an emerging membrane separation technology, electrodialysis (ED) technology can realize the concentration and desalination of the solution by using the directional migration of charged ions through the ion exchange membrane under the action of a direct current electric field. This technology is widely used in the fields of chemical desalination and seawater desalination, and has the advantages of no need to add chemical reagents, high selectivity and low energy consumption. However, there are currently research reports on electrodialysis treatment of wastewater. [0003] The invention patent application document of application publication number CN103936214A discloses a bipolar membrane electrodialysis treatment of 3-aminopyrazole-4-carb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06
Inventor 张云保徐雷金吕伏建陈丽娜
Owner ZHEJIANG QICAI ECO TECH CO LTD
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