an o 3 / Photocatalytic advanced oxidation reaction system and method for high concentration wastewater

A high-concentration wastewater, advanced oxidation technology, applied in chemical instruments and methods, oxidized water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of preventing the ozone oxidation process, high operating costs, and low treatment efficiency. , to facilitate replacement and recycling, reduce production costs, and improve processing efficiency

Active Publication Date: 2022-07-15
北京中矿科技集团有限公司
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  • Summary
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  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although the ozone oxidation method has a strong ability to decolorize and remove organic pollutants, the operating cost of this method is relatively high, and it is selective to the oxidation of organic matter, and the pollutants cannot be completely mineralized in a low dose and in a short time. The resulting intermediate product blocks the ozone oxidation process
There are problems such as low treatment efficiency, large amount of ozone input, high operating cost, and difficulty in completely degrading some refractory pollutants.
Patent No. CN209906422U discloses a device for ozone / hydrogen peroxide advanced oxidation refractory industrial wastewater. The device combines ozone and hydrogen peroxide advanced oxidation to effectively improve the utilization rate of ozone, reduce the amount of ozone, and reduce While reducing the production cost, the effect of advanced treatment is enhanced; however, in the long run, hydrogen peroxide has strong oxidative properties, and the damage rate of equipment is relatively high, which will inevitably increase production costs, and the entire production line needs to be stopped when replacing hydrogen peroxide-related equipment components. Reduce production efficiency; there are safety hazards in the operation process of highly corrosive hydrogen peroxide, which will pose a threat to the personal safety of workers

Method used

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  • an o <sub>3</sub> / Photocatalytic advanced oxidation reaction system and method for high concentration wastewater
  • an o <sub>3</sub> / Photocatalytic advanced oxidation reaction system and method for high concentration wastewater

Examples

Experimental program
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Effect test

Embodiment 1

[0045] use figure 1 and figure 2 The reaction device shown treats printing and dyeing wastewater, and the treatment process is as follows:

[0046] 1) The printing and dyeing wastewater to be treated is pretreated in the pretreatment module;

[0047] 2) The pretreated wastewater was passed into the reaction device. The amount of photocatalyst pumped was 10g, the amount of ozone was 90mg / L, and the hydraulic retention time was 120min. After the reaction was stable, the CODCr of the printing and dyeing wastewater at the water outlet was measured. The COD removal rate can reach 73.2%.

Embodiment 2

[0049] use figure 1 and figure 2 The reaction device shown treats printing and dyeing wastewater, and the treatment process is as follows:

[0050] 1) The printing and dyeing wastewater to be treated is pretreated in the pretreatment module;

[0051] 2) The pretreated wastewater was passed into the reaction device. The amount of photocatalyst pumped was 20g, the amount of ozone was 60mg / L, and the hydraulic retention time was 120min. After the reaction was stable, the CODCr of the printing and dyeing wastewater at the water outlet was measured. The COD removal rate can reach 83.4%.

[0052] To sum up, it can be seen from the comparison of the results of the COD removal rate of Example 1 and Example 1 that the removal rate of COD is improved after adding the photocatalyst, which shows that under the same other conditions, the wastewater under the synergistic effect of ozone and photocatalysis Better processing.

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Abstract

The invention discloses a kind of O 3 / Photocatalytic advanced oxidation reaction system and method for high concentration wastewater. The wastewater treatment system includes a pretreatment module (8), an ozone generator (9) and a reaction device (1), the reaction device includes a housing (2), an ultraviolet light generator (3) and a photocatalyst transmission assembly, The photocatalyst transmission assembly includes a main body part (4) and a plurality of branch parts (5) for dispersing photocatalysts; the advanced oxidation wastewater treatment method includes three steps: wastewater pretreatment, advanced oxidation, and reflux treatment. Beneficial effects of the present invention: the present invention adopts two advanced oxidation methods of ozone and photocatalysis to synergistically treat high-concentration wastewater, improves treatment efficiency, reduces the amount of ozone put in, reduces the use of corrosive raw materials, reduces equipment loss, and reduces The production cost is increased, the contact area between the photocatalyst and the wastewater to be treated is increased, the replacement and recovery of the photocatalyst is convenient, and the degradation efficiency is improved.

Description

technical field [0001] The present invention relates to the field of wastewater treatment, in particular to a kind of O 3 / Photocatalytic advanced oxidation reaction system and method for high concentration wastewater. [0002] technical background [0003] At present, my country's economic development is in a stage of rapid take-off, which means that industrial production has also entered a period of rapid development. As a result, it is inevitable to take environmental pollution as the price, and how to harmlessly discharge the pollutants into the ecosystem. Processing has become a major challenge for researchers and producers. [0004] Advanced oxidation technology, also known as deep oxidation technology, is characterized by the generation of hydroxyl radicals ( OH) with strong oxidizing ability. Oxidized into low-toxic or non-toxic small molecular substances. Because it can directly mineralize pollutants in wastewater or improve the biodegradability of pollutants thro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/08
CPCC02F9/00C02F1/001C02F1/24C02F1/283C02F1/32C02F1/66C02F1/725C02F1/78C02F2305/10
Inventor 单兴华
Owner 北京中矿科技集团有限公司
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