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Ultrasonic ozone treating technique of chlorophenol-containing wastewater

A technology of ozone treatment and chlorophenol, which is applied in the direction of oxidized water/sewage treatment, water/sewage treatment, water/sludge/sewage treatment, etc. It can solve the problems of high energy consumption, difficulty in adapting to multi-component wastewater, and economical process conditions Poor performance and other problems, to achieve the effect of low energy consumption, great market development prospects, and high removal efficiency

Active Publication Date: 2007-09-19
ZHEJIANG UNIV OF TECH
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  • Description
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Problems solved by technology

This fully demonstrates that ultrasonic ozone technology can effectively treat chlorophenol wastewater, but the process conditions used are poor in economy and high in energy consumption, making it difficult to apply to the actual multi-component wastewater

Method used

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  • Ultrasonic ozone treating technique of chlorophenol-containing wastewater
  • Ultrasonic ozone treating technique of chlorophenol-containing wastewater
  • Ultrasonic ozone treating technique of chlorophenol-containing wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0032] Implementation plan: Ultrasonic ozone oxidation treatment process for waste water containing 50.02 mg / L of p-chlorophenol, using a stainless steel reaction tank, and the ozone input is in contact with the waste water through a microporous diffuser fixed on the bottom of the reaction tank. O 3 and water vapor pyrolyze in the cavitation bubble to produce OH, and realize the deep oxidation and decomposition of p-2-chlorophenol pollutants, so as to achieve the purpose of ultrasonic ozonation treatment of p-chlorophenol-containing wastewater. The wastewater treatment results are shown in Table 1, and Xu Xianwen et al. (2005, J.Zhejiang SCI 6B (6)) reported the results for comparison.

[0033] Table 1: Wastewater Treatment Results

[0034]

[0035] Monitoring method: Chlorophenol adopts the liquid chromatography analysis and detection method stipulated in "Water and Wastewater Monitoring and Analysis Methods" compiled by the State Environmental Prot...

Embodiment 2

[0038] Other conditions are with embodiment 1, waste water contains chlorophenol (the mixture of ortho-chlorophenol, p-chlorophenol, m-chlorophenol) 200mg / L, at sound wave frequency 40kHz, ozone level 10mg / L h, hydraulic retention time 60min and Under the process conditions of 90min, the removal effect of o-chlorophenol by the sonic energy density (50, 100, 150W / L) was compared, and the treatment results are shown in Table 2.

[0039] Table 2: Wastewater treatment results under different acoustic energy densities

[0040]

[0041]

[0042] The results in Table 2 show that the increase of ultrasonic sound energy density is helpful for the removal of p-chlorophenol. After 90 minutes, the removal of chlorophenol increased from 77.9% to 80.4%. However, the increase rate of chlorophenol removal rate decreased. When 50W / L increased to 100W / L, the removal rate of chlorophenol increased by 5.2 percentage points. When 100W / L increased to 150W / L, the removal rate of ...

Embodiment 3

[0044] Other conditions are with embodiment 2, and sound energy density is 100W / L, and hydraulic retention time 90min in the tank compares ozone amount (10mg / L h, 20mg / L h, 30mg / L h) p-chlorophenol removal effect, See Table 3 for the processing results.

[0045] Table 3: Wastewater treatment results under different ozone levels

[0046]

[0047] The results in Table 3 show that the increase in the amount of ozone contributes to the removal of chlorophenol, and the removal of chlorophenol increases from 90.7% to 94.4%. However, the increase rate of chlorophenol removal rate decreased. When the amount of ozone increased from 10mg / L·h to 20mg / L·h, the removal of chlorophenol increased by 12.8 percentage points, and when 20mg / L·h increased to 30mg / L·h , chlorophenol removal increased by 3.7 percentage points. For higher concentrations of chlorophenol wastewater, it is necessary to increase the amount of ozone appropriately.

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Abstract

The present invention provides a chlorophenol-containing wastewater treatment technology by ultrasonic ozonation, wherein a stainless steel ultrasonic wave reaction tank is adopted, the ozone contacts with the waste water through a pore diffuser fixed at the bottom of the reaction tank, the chlorophenol of the waste water is removed under the condition of a sound wave frequency of 40 kHz, a sound energy density of 50~150 W / L, a ozone amount of 10~30 mg / L.h, a pH value of 8.0~8.2 and a water power residence time in the tank of 60~90 min. In the present invention, by optimizing the technological parameters, the purpose of lower energy consumption, high removing efficiency is realized, and the technology is adapted to the practical chlorophenol-containing wastewater treatment and has excellent market development prospect.

Description

(1) Technical field [0001] The invention relates to a process for treating chlorine-containing phenol wastewater with ultrasonic ozone. (2) Background technology [0002] Chlorine-containing organic compounds are widely used in chemical, petrochemical, and pesticide production, and are discharged into the environment in gaseous and liquid forms, resulting in the "three effects". Acoustic, ozone and other advanced oxidation technologies are known as a type of "environmentally friendly" technology because of their good environmental compatibility, which provides a broad prospect for the pollution control of chlorinated organic compounds. Related research and application have been It has aroused widespread attention from domestic and foreign counterparts, especially the combined use of oxidation technology can form a synergistic effect, which represents a development trend of advanced oxidation technology in this field. [0003] Chlorophenols are a class of pollutants that are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/58C02F1/78C02F1/36C02F101/36
Inventor 陈建孟王家德
Owner ZHEJIANG UNIV OF TECH
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