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A treatment method and treatment device for high-salt and high-cod organic wastewater

A technology of organic wastewater and treatment methods, applied in the field of organic wastewater treatment, can solve problems such as inorganic salt pollution, inability to oxidize and degrade organic matter, difficulty in meeting discharge requirements, etc.

Active Publication Date: 2021-06-08
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in the treatment method of high-salt and high-COD organic wastewater, since the organic matter cannot be completely oxidized and degraded, the separated water often contains a certain amount of organic matter, which is difficult to meet the discharge requirements, and the separated salt is also doped with a certain amount of organic matter. Contamination of separated inorganic salts

Method used

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  • A treatment method and treatment device for high-salt and high-cod organic wastewater
  • A treatment method and treatment device for high-salt and high-cod organic wastewater
  • A treatment method and treatment device for high-salt and high-cod organic wastewater

Examples

Experimental program
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Effect test

Embodiment 1

[0036] (1) Take high-salt and high-COD organic wastewater (NaCl content 19.0wt.%, COD: 20000mg / L) and join in the wastewater storage tank, add anhydrous ferrous chloride catalyst and stir evenly, Fe in the organic wastewater 2+ The molar concentration is 0.5mmol / L;

[0037] (2) Preheat to 300°C, enter the 2 o 5 / SBA-15 catalyst reacts with oxygen in a fixed-bed reactor; control the reaction temperature to 300°C, the reaction pressure to 7.5MPa, the residence time to 5min, and the flow rate of waste water to 200ml / min;

[0038] (3) Sampling and analysis at the outlet of the fixed bed reactor, then enter the flashing device, cool down, and centrifuge the solid salt NaCl through the desalination filter, return the concentrated solution after centrifugation to the filtering device, then enter the preheating device, and apply it to In the process, the recycling of catalytic oxidation aids is realized.

[0039] After testing, the COD removal rate of the treated organic wastewater...

Embodiment 2

[0041] (1) Get high-salt and high-COD organic wastewater (NaCl content 24.1wt.%, COD: 20000mg / L) and join in the wastewater storage tank, add anhydrous ferrous chloride catalyst and stir evenly, Fe in the organic wastewater 2+ The molar concentration is 0.5mmol / L;

[0042] (2) Preheat to 120°C, enter the 2 o 5 In the fixed-bed reactor of SBA-15 catalyst, it reacts with oxygen; the reaction temperature is controlled at 120°C, the reaction pressure is 2.5MPa, the residence time is 180min, and the flow rate of waste water is 5.6ml / min;

[0043] (3) Sampling and analysis at the outlet of the fixed bed reactor, then enter the flashing device, cool down, and centrifuge the solid salt NaCl through the desalination filter, return the concentrated solution after centrifugation to the filtering device, then enter the preheating device, and apply it to In the process, the recycling of catalytic oxidation aids is realized.

[0044] After testing, the removal rate of COD in the treated ...

Embodiment 3

[0046] (1) Take high-salt and high-COD organic wastewater (KCl content 10.0wt.%, COD: 10000mg / L) and join in the wastewater storage tank, add anhydrous ferrous chloride catalyst and stir evenly, Fe in the organic wastewater 2+ The molar concentration is 0.2mmol / L;

[0047] (2) Preheat to 300°C, enter the 2 o 5 / SBA-15 catalyst reacts with oxygen in a fixed bed reactor; control the reaction temperature to 300°C, the reaction pressure to 10.0MPa, the residence time to 5min, and the flow rate of waste water to 200ml / min;

[0048] (3) Sampling and analysis at the outlet of the fixed-bed reactor, then enter the flashing device, cool down, and centrifuge the solid salt KCl through the desalination filter, return the concentrated solution after centrifugation to the filter device, then enter the preheating device, and apply it to In the process, the recycling of catalytic oxidation aids is realized.

[0049] After testing, the removal rate of COD in the treated organic wastewater ...

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Abstract

The invention belongs to the technical field of organic wastewater treatment, and in particular relates to a treatment method and a treatment device for high-salt and high-COD organic wastewater. The treatment method is to mix catalytic oxidation additives into the high-salt and high-COD organic wastewater in advance, enter the fixed-bed reactor after preheating, and oxidize with the oxidant, thereby oxidizing the organic matter in the wastewater to H 2 O and CO 2 After the reaction, the reacted liquid is desalted through flash evaporation, evaporation and concentration; the invention also provides a treatment device for high-salt and high-COD organic wastewater. The present invention combines soluble ferrous salt and V 2 o 5 The combination of / SBA-15 gives full play to the synergistic effect between the two, so that the organic matter in the wastewater can be quickly and deeply oxidized and removed; the COD content in the organic wastewater can be greatly reduced, and the water and solid salt can be effectively separated, and the water and solid The content of organic matter in the salt is low, the separated water can be reused, and the solid salt can also be used as a by-product.

Description

technical field [0001] The invention belongs to the technical field of organic wastewater treatment, and in particular relates to a treatment method and a treatment device for high-salt and high-COD organic wastewater. Background technique [0002] High-salt and high-COD organic wastewater refers to wastewater with a content of organic matter and total dissolved solids greater than 3.5wt.%, and its main sources are: 1. Wastewater discharged after seawater is directly used in industrial production and life; , pharmaceutical / pesticide / dye and its intermediate production process wastewater, printing and dyeing wastewater, fine chemical wastewater, dairy product processing wastewater, etc. The content of inorganic salts in these wastewaters is generally between 15-25wt.%, and the COD content of organic matter is between 10 3 -10 5 mg / L, its pollution to the environment is very serious. Because there are a lot of inorganic salts in these high-salt and high-COD organic wastewat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/10C02F101/30
CPCC02F1/04C02F1/06C02F1/725C02F2101/30C02F2301/08
Inventor 崔洪友王景华王勇宋峰孙秀玉谢玉娇赵萍萍张广俊
Owner SHANDONG UNIV OF TECH
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