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Device for degrading waste water containing high-concentration nitrobenzene through air stripping-ozone/ultrasound oxidation and treatment method of device

A technology for nitrobenzene wastewater and oxidative degradation, which is applied in the directions of oxidized water/sewage treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problem of high cost of high-concentration nitrobenzene-containing wastewater, Achieve the effect of improving ozone oxidation efficiency, improving oxidation efficiency, and improving ozone oxidation efficiency

Inactive Publication Date: 2015-06-17
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 high-cost problem of high-concentration nitrobenzene wastewater treatment by ozone advanced oxidation, the present invention provides a blow-off-ozone / ultrasonic oxidation degradation Device and treatment method for concentrated nitrobenzene wastewater

Method used

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  • Device for degrading waste water containing high-concentration nitrobenzene through air stripping-ozone/ultrasound oxidation and treatment method of device
  • Device for degrading waste water containing high-concentration nitrobenzene through air stripping-ozone/ultrasound oxidation and treatment method of device

Examples

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Effect test

Embodiment 1

[0031] Example 1: Utilization figure 1 The procedure shown treats a water sample containing nitrobenzene at a concentration of 500 mg / L. The supergravity reactor speed was 700 rpm. When the gas-liquid ratio is 200 in the stripping process, 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 after that. At this time, the advanced treatment is carried out by ozone / ultrasonic oxidation technology. In the wastewater after stripping, preliminary oxidation and degradation are firstly carried out in the ultrasonic storage tank, and the ultrasonic sound intensity is 100W / cm 2 , the frequency is 100kHz, and then it enters the hypergravity reactor to fully contact and react with ozone. The ozone concentration is 10 mg / L, the liquid-gas ratio is 0.5, the circulating treatment is 21 min, and the nitrobenzene con...

Embodiment 2

[0032] Example 2: Utilization figure 1 The process shown is to treat wastewater containing nitrobenzene. The concentration of nitrobenzene in the wastewater was 800 mg / L, and the pH was 7.1. The supergravity reactor speed was 500 rpm. In the stripping process, the gas-liquid ratio is 400. 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 after that. Utilize ozone / ultrasonic oxidation technology to carry out advanced treatment, in the wastewater after stripping, first carry out preliminary oxidation degradation in ultrasonic storage tank, ultrasonic sound intensity is 50W / cm 2 , the frequency is 50kHz, and then it enters the hypergravity reactor to fully contact and react with ozone. The ozone concentration is 15 mg / L, the liquid-gas ratio is 1.0, the circulating treatment is 15 min, and the nitro...

Embodiment 3

[0033] Example 3: Utilization figure 1 The process shown is to treat wastewater containing nitrobenzene. The concentration of nitrobenzene in the wastewater was 1500 mg / L and the pH was 6.8. The supergravity reactor speed was 300 rpm. In the stripping process, the gas-liquid ratio is 500. 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 after that. Utilize ozone / ultrasonic oxidation technology to carry out advanced treatment, in the wastewater after stripping, firstly carry out preliminary oxidation degradation in ultrasonic storage tank, ultrasonic sound intensity is 1 W / cm 2 , the frequency is 20 kHz, and then it enters the hypergravity reactor to fully contact and react with ozone. The ozone concentration is 30 mg / L, the liquid-gas ratio is 2.0, and the circulating treatment is 30 min. The nit...

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Abstract

The invention provides a device for degrading waste water containing high-concentration nitrobenzene through air stripping-ozone / ultrasound oxidation and treatment method of the device, belongs to the technical field of high-concentration nitrobenzene-containing waste water treatment, and aims to solve the problem of high cost of ozone-based advanced oxidation process for treating high-concentration nitrobenzene-containing waste water. The method comprises the following steps: firstly, high-concentration nitrobenzene-containing waste water is in contact with air in a hypergravity device to complete air stripping mass transfer process; after the air stripping mass transfer process is completed, the waste water is subjected to ultrasonic wave degradation, the degraded waste water is fed into the hypergravity device to react with ozone gas, the waste water containing ozone returns to an ultrasound liquid storage pot, and then nitrobenzene is degraded under an ultrasonic wave synergistic effect. The air-stripping method is used to enable target pollutant content in the waste water to be reduced to carry out oxidation reaction, so that waste water quality change is reduced to the largest extent, and the intermediate product production amount is further reduced, the ozone and hydroxyl free radical consumption substance production amount can be reduced, the oxidation efficiency is improved, the ozonation efficiency is improved by 40%-50%, the treatment time is shortened by 80%, the usage amount of ozone is reduced by 70%, and the treatment cost is reduced by 50%.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment containing high-concentration nitrobenzene, and specifically relates to a blow-off-ozone / ultrasonic oxidation degradation device and a treatment method for waste water containing high-concentration nitrobenzene, which uses blow-off method, ozone technology and ultrasonic waves Technologies work together. 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 compo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/08C02F1/78C02F103/38
Inventor 刘有智焦纬洲申红艳罗莹张巧玲祁贵生袁志国高璟栗秀萍郭亮
Owner ZHONGBEI UNIV
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