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Method for treating pharmaceutical wastewater through nanometer Fe3O4 Fenton-like technology

A technology for pharmaceutical wastewater and technical treatment, which is applied in water/sludge/sewage treatment, water/sewage treatment, neutralized water/sewage treatment, etc. It can solve the problem that the COD of biochemical effluent cannot meet the standard, increase the coagulation and sedimentation process, and it is difficult to further Eliminate problems such as reducing treatment costs, producing less sludge, and reducing usage.

Inactive Publication Date: 2016-08-17
HIT YIXING ACAD OF ENVIRONMENTAL PROTECTION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the COD in the biochemical effluent of the existing pharmaceutical wastewater cannot reach the standard and is difficult to remove further. However, the existing Fenton oxidation method and the Fenton-like method produce a large amount of iron sludge when the oxidation is completed to adjust the pH, and coagulation and sedimentation need to be increased. process issues, while providing a way to utilize nano-Fe 3 o 4 Method for treating pharmaceutical wastewater by Fenton-like technology

Method used

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  • Method for treating pharmaceutical wastewater through nanometer Fe3O4 Fenton-like technology

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specific Embodiment approach 1

[0021] Specific implementation mode 1: This implementation mode is a method using nano-Fe 3 o 4 The method for treating pharmaceutical wastewater by Fenton-like technology is completed in the following steps:

[0022] 1. Adjust the pH value: adjust the pH value of the pharmaceutical wastewater to 2-4 to obtain pharmaceutical wastewater with a pH value of 2-4;

[0023] 2. Add nano-Fe 3 o 4 And hydrogen peroxide: first add nano-Fe to the pharmaceutical wastewater with a pH value of 2-4 3 o 4 , and then add hydrogen peroxide with a mass fraction of 30%, to obtain the addition of nano-Fe 3 o 4 and hydrogen peroxide pharmaceutical wastewater;

[0024] Nano-Fe described in step 2 3 o 4 The dosage is 0.5g / L~2.0g / L;

[0025] The amount of hydrogen peroxide with a mass fraction of 30% described in step 2 is 0.5mL / L to 2.0mL / L;

[0026] 3. Nano Fe will be added 3 o 4 The pharmaceutical wastewater with hydrogen peroxide is stirred and reacted at a stirring speed of 100r / min ...

specific Embodiment approach 2

[0036] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the nano-Fe described in step two 3 o 4 The dosage is 0.5g / L~1.0g / L. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0037] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the nano-Fe described in step two 3 o 4The dosage is 1.0g / L~2.0g / L. Other steps are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a method for treating pharmaceutical wastewater through a nanometer Fe3O4 Fenton-like technology, relates to a method for treating the pharmaceutical wastewater and aims to solve the problems that at present, pharmaceutical wastewater biochemical effluent COD can not reach the standard and is hard to remove further, and when an existing Fenton oxidation method and an existing Fenton-like method finish pH regulation through oxidation, the amount of produced iron mud is large, the coagulating sedimentation technology needs to be added. The method comprises the first step of regulating the pH value, the second step of adding nanometer Fe3O4 and hydrogen peroxide, the third step of stirring for reaction, and conducting magnetic separation on the pharmaceutical wastewater with the hydrogen peroxide through a direct-current electromagnet so that magnetically attracted nanometer Fe3O4 and liquid supernatant obtained after separation can be obtained, and the fourth step of regulating the pH value and conducting washing to obtain treated water and regenerated nanometer Fe3O4. The values of COD in the treated water are lower than 50 mg / L. The method is used for treating the pharmaceutical wastewater through the nanometer Fe3O4 Fenton-like technology.

Description

technical field [0001] The invention relates to a method for treating pharmaceutical wastewater. Background technique [0002] Pharmaceutical wastewater is a typical highly polluted and refractory industrial production wastewater. In recent years, with the further improvement of treatment difficulty and treatment requirements, advanced oxidation treatment is used to further remove the refractory organic pollutants in the biochemical effluent. At present, there are treatment technologies that use Fenton's reagent for advanced treatment of pharmaceutical wastewater, or further improve the application of Fenton's system. [0003] Magnetic nano-Fe 3 o 4 -H 2 o 2 The Fenton-like system is based on the improvement of the traditional Fenton reagent. Aiming at the defect of a large amount of iron sludge produced by adjusting the pH after the traditional Fenton treatment, the magnetic nano Fe 3 o 4 particles as Fe in the Fenton system 2+ The donor forms a heterogeneous Fenton-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/12
CPCC02F9/00C02F1/484C02F1/488C02F1/66C02F1/722C02F2103/343C02F2301/08C02F2305/026
Inventor 杨乐郭海娟邱珊杨基先马放
Owner HIT YIXING ACAD OF ENVIRONMENTAL PROTECTION
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