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A method and device for blowing off oxidation degradation wastewater containing high concentration of nitrobenzene

A nitrobenzene wastewater, oxidative degradation technology, applied in chemical instruments and methods, water pollutants, water/sewage multi-stage treatment, etc., can solve the problem of high cost of high-concentration nitrobenzene wastewater, and improve the efficiency of ozone oxidation. , processing time shortening, the effect of shortening processing time

Active Publication Date: 2017-06-27
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem of high cost of treating wastewater containing high-concentration nitrobenzene by the advanced ozone oxidation method, the present invention provides a method and device for blowing off oxidation and degrading wastewater containing high-concentration nitrobenzene

Method used

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  • A method and device for blowing off oxidation degradation wastewater containing high concentration of nitrobenzene
  • A method and device for blowing off oxidation degradation wastewater containing high concentration of nitrobenzene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1: Using figure 1 The flow shown is for the treatment of wastewater containing nitrobenzene. The concentration of nitrobenzene in the wastewater is 600mg / L, and the pH value is 6.8. The supergravity reactor rotates at 700 rpm. The gas-liquid ratio of fresh air and wastewater in the supergravity equipment in the stripping stage is 200 L / m 3 , when the concentration of nitrobenzene in the wastewater is reduced to 80 mg / L, the treatment time can be shortened by 80% compared with the traditional stripping equipment, and the stripping efficiency is significantly reduced afterwards. At this time, advanced treatment is carried out using ozone advanced oxidation technology, and H 2 o 2 , so that in the supergravity reactor mixed liquid H 2 o 2 The concentration is 0.1 mmol / L, the ozone concentration is 10 mg / L, and the liquid-gas ratio of wastewater to ozone is 0.5 L / m 3 , cycle treatment for 15 minutes, the content of nitrobenzene in the wastewater is 2.0 mg / L, ...

Embodiment 2

[0030] Example 2: Using figure 1 The flow shown is for the treatment of wastewater containing nitrobenzene. The concentration of nitrobenzene in the wastewater is 1000mg / L, and the pH value is 7.1. The supergravity reactor rotates at 500 rpm. The gas-liquid ratio of fresh air and wastewater in the supergravity equipment in the stripping stage is 400 L / m 3 , when the concentration of nitrobenzene in the wastewater is reduced to 100 mg / L, the treatment time can be shortened by 80% compared with the traditional stripping equipment, and the stripping efficiency is significantly reduced afterwards. Utilize advanced ozone oxidation technology for advanced treatment, add H to the stripped wastewater 2 o 2 , so that in the supergravity reactor mixed liquid H 2 o 2 The concentration is 1.0 mmol / L, the ozone concentration is 15 mg / L, and the liquid-gas ratio of wastewater to ozone is 1.0 L / m 3 , cycle treatment for 15 minutes, the content of nitrobenzene in the wastewater is 2.0 ...

Embodiment 3

[0031] Example 3: Using figure 1 The flow shown is for the treatment of wastewater containing nitrobenzene. The concentration of nitrobenzene in the wastewater is 1500mg / L, and the pH value is 6.8. The supergravity reactor rotates at 300 rpm. The gas-liquid ratio of fresh air and wastewater in the supergravity equipment in the stripping stage is 500 L / m 3 , when the concentration of nitrobenzene in the wastewater is reduced to 90 mg / L, the treatment time can be shortened by 80% compared with the traditional stripping equipment, and the stripping efficiency is significantly reduced afterwards. Utilize advanced ozone oxidation technology for advanced treatment, add H to the stripped wastewater 2 o 2 , so that in the supergravity reactor mixed liquid H 2 o 2 The concentration is 2.9 mmol / L, the ozone concentration is 30 mg / L, and the liquid-gas ratio of wastewater to ozone is 2.0 L / m 3 , cycle treatment for 15 minutes, the content of nitrobenzene in the wastewater is 2.0 m...

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Abstract

The invention belongs to the technical field of high-concentration nitrobenzene-containing wastewater treatment, and provides a method for stripping and oxidatively degrading high-concentration nitrobenzene-containing wastewater in order to solve the problem of high cost of treating high-concentration nitrobenzene-containing wastewater by an ozone advanced oxidation method and device. The high-concentration nitrobenzene-containing wastewater is contacted with fresh air in the supergravity equipment to complete the stripping mass transfer process; after the stripping and mass transfer is completed, the wastewater is sent to the storage tank to be mixed with hydrogen peroxide, and then mixed with ozone in the supergravity equipment The gas contact reaction, the remaining organic matter in the wastewater is in the ozone and H 2 O 2 synergistically degrade. Improve the efficiency of ozone oxidation, shorten the treatment time, use the stripping method to reduce the pollutant content in the wastewater and then carry out the oxidation reaction, minimize the change of the wastewater quality, reduce the generation of intermediate products, and reduce the generation of ozone and hydroxyl radicals. The oxidation efficiency is increased by 65~75%, the treatment time is shortened by 80%, the ozone consumption is reduced by 70%, and the treatment cost is saved by 50%.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment containing high-concentration nitrobenzene, and in particular relates to a method and device for blowing off, oxidizing and degrading wastewater containing high-concentration nitrobenzene. Background technique [0002] Explosive industrial wastewater often contains high concentrations of volatile and biologically toxic nitrobenzene compounds, which have strong carcinogenic and mutagenic properties. If they are discharged directly without treatment, they will cause serious harm to the human body and the environment. [0003] Air blowing is generally installed at the bottom of the water treatment with an aeration device. The air sent by the fan is dispersed into tiny bubbles, forming a gas-liquid two-phase in the main body of the wastewater, and the volatile organic compounds in the wastewater are transferred from the liquid phase to the gas phase. , leaving the main body of the liquid ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F101/38
Inventor 刘有智焦纬洲张巧玲祁贵生袁志国高璟罗莹栗秀萍申红艳郭亮
Owner ZHONGBEI UNIV
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