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Treatment method and treatment device of high-salinity and high-COD (Chemical Oxygen Demand) organic wastewater

A technology of organic wastewater and treatment method, which is applied in the field of organic wastewater treatment, can solve the problems of inorganic salt pollution, difficulty in meeting discharge requirements, inability to oxidize and degrade organic matter, etc., and achieve the effects of recycling, low treatment cost and prolonging service life

Active Publication Date: 2018-11-13
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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  • Treatment method and treatment device of high-salinity and high-COD (Chemical Oxygen Demand) organic wastewater
  • Treatment method and treatment device of high-salinity and high-COD (Chemical Oxygen Demand) organic wastewater
  • Treatment method and treatment device of high-salinity and high-COD (Chemical Oxygen Demand) organic wastewater

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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 add it to the wastewater storage tank, add anhydrous ferrous chloride catalyst and stir evenly, and Fe in the organic wastewater 2+ The molar concentration is 0.5mmol / L;

[0037] (2) Preheat to 300 °C, enter the device with V 2 O 5 In the fixed bed reactor of / SBA-15 catalyst, it reacts with oxygen; the reaction temperature is controlled to be 300°C, the reaction pressure is 7.5MPa, the residence time is 5min, and the flow rate of the waste water is 200ml / min;

[0038] (3) Sampling and analysis at the outlet of the fixed-bed reactor, then entering the flash evaporation device, cooling, and centrifuging out the solid salt NaCl through the desalting filter, and the centrifuged concentrated solution is returned to the filter device, then enters the preheating device, and is applied to In the process, the recycling of catalytic oxidation assistants is realized.

[0039] After t...

Embodiment 2

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

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

[0043] (3) Sampling and analysis at the outlet of the fixed-bed reactor, then entering the flash evaporation device, cooling, and centrifuging out the solid salt NaCl through the desalting filter, and the centrifuged concentrated solution is returned to the filter device, then enters the preheating device, and is applied to In the process, the recycling of catalytic oxidation assistants is realized.

[0044] After ...

Embodiment 3

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

[0047] (2) Preheat to 300 °C, enter the device with V 2 O 5 In the fixed bed reactor of / SBA-15 catalyst, it reacts with oxygen; the reaction temperature is controlled to be 300°C, the reaction pressure is 10.0MPa, the residence time is 5min, and the flow rate of the waste water is 200ml / min;

[0048] (3) Sampling and analysis at the outlet of the fixed-bed reactor, then entering the flash evaporation device, cooling, and centrifuging the solid salt KCl through the desalting filter, the centrifuged concentrated solution is returned to the filter device, and then enters the preheating device, which is applied to In the process, the recycling of catalytic oxidation assistants is realized.

[0049] After test...

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Abstract

The invention belongs to the technical field of organic wastewater treatment, and specifically relates to a treatment method and a treatment device of high-salinity and high-COD (Chemical Oxygen Demand) organic wastewater. The treatment method is characterized by mixing a catalytic oxidation assistant in the high-salinity and high-COD organic wastewater in advance, preheating, entering a stationary bed reactor, and carrying out oxidation reaction with an oxidant, thus oxidizing organic matters in wastewater into H2O and CO2; carrying out flash evaporation and evaporation concentration on a reaction solution after reaction, and desalting. Meanwhile, the invention provides the treatment device of the high-salinity and high-COD organic wastewater. According to the treatment method and the treatment device, provided by the invention, soluble ferrite is combined with V2O5 / SBA-15, and a synergistic effect between the soluble ferrite and the V2O5 / SBA-15 is fully expressed, so that the organicmatters in the wastewater can be quickly and deeply oxidized so as to be removed; the content of COD in the high-salinity and high-COD organic wastewater is greatly reduced, water and solid salt canbe effectively separated, the content of the organic matters in the water and the solid salt is low, the separated water can be reused, and the solid salt can also be used as a byproduct.

Description

Technical field [0001] The invention belongs to the technical field of organic wastewater treatment, and specifically relates to a treatment method for high-salt and high-COD organic wastewater and a treatment device thereof. Background technique [0002] High-salt and high-COD organic wastewater refers to wastewater with an organic matter and total dissolved solids content greater than 3.5wt.%. Its main sources are: 1. Wastewater discharged after seawater is directly used for industrial production and domestic use; 2. Petroleum mining wastewater , pharmaceutical / pesticide / dye and 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 10 3 -10 5 mg / L, its pollution to the environment is very serious. Due to the presence of a large amount of inorganic salts in th...

Claims

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Application Information

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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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