Method for treating coking wastewater by using ozone under catalysis of activated carbon

A coking wastewater and ozone treatment technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve low solubility, low oxidation efficiency, and limitation of application effect of ozone oxidation method, etc. question

Inactive Publication Date: 2013-06-12
SHANGHAI UNIV
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Problems solved by technology

However, due to the low solubility of ozone in water, the oxidation efficiency is low; and, because the direct oxidation of ozone often cannot completely decompose r...

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  • Method for treating coking wastewater by using ozone under catalysis of activated carbon
  • Method for treating coking wastewater by using ozone under catalysis of activated carbon
  • Method for treating coking wastewater by using ozone under catalysis of activated carbon

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Embodiment Construction

[0012] The method for treating coking wastewater of the present invention will be described in conjunction with examples.

[0013] 1. The COD concentration of the coking wastewater to be treated is 800~1000mg / L, and the concentration of volatile phenol is 15~25mg / L. The volume of the closed reactor used is 10L, and about 200g of activated carbon is added in advance;

[0014] 2. Before the coking wastewater enters the reactor, adjust its pH to 8~10;

[0015] 3. Coking wastewater enters the reactor in a continuous flow mode, and the flow of coking wastewater is maintained at about 10L / h;

[0016] 4. After the coking wastewater enters the reactor, pass ozone into the bottom of the reactor, adjust the ozone concentration to 3g / h, so that the ozone fully contacts the wastewater and activated carbon;

[0017] 5. The effluent from the reactor enters the sedimentation tank, the activated carbon flowing in with the water is precipitated in the sedimentation tank, and the supernatant liquid of t...

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Abstract

The invention provides a method for treating coking wastewater by using ozone under catalysis of activated carbon. The method comprises the following steps of: continuously leading coking wastewater into a catalytic reactor in which activated carbon particles are fed in advance, continuously introducing ozone into the reactor from the bottom of the reactor so that the coking wastewater, activated carbon and ozone have reaction completely; enabling the treated waste water to flow into a settling tank, separating treated effluent water from activated carbon flowing out together with water, feeding the separated activated carbon into the reactor again through a pump, leading the effluent water to the following biological treatment technique. The COD removal rate of the coking wastewater treated by adopting the method is more than 60%, the removal rate of volatile phenol can is more than 90%, and the chromacity is obviously removed.

Description

Technical field [0001] The invention relates to an ozone catalytic oxidation water treatment method, in particular to the treatment of refractory organic pollutants in coking wastewater. Background technique [0002] Because coking wastewater contains a large amount of refractory organic matter, it is difficult for the effluent water quality indicators to meet the national discharge standards if the coking wastewater is simply treated by biological methods. In recent years, as an advanced oxidation technology, ozone oxidation has been increasingly applied to the treatment of industrial wastewater. However, due to the low solubility of ozone in water, the oxidation efficiency is low; and because the direct oxidation of ozone often cannot completely decompose the refractory organic matter into carbon dioxide, the oxidation intermediate products produced may be toxic, which makes the ozone oxidation method The effect of the application is limited. It should be noted that the oxida...

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Application Information

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IPC IPC(8): C02F9/04
Inventor 万哲希丁国际周惟斌沈海桦陈斯芝张晶
Owner SHANGHAI UNIV
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