In-situ adsorption-microelectrolysis-catalytic oxidation sewage treatment equipment and method

A sewage treatment equipment and catalytic oxidation technology, which are applied in the fields of adsorption water/sewage treatment, oxidized water/sewage treatment, water/sewage treatment, etc., can solve the problems of low space-time efficiency, slow reaction rate, low efficiency of pollutant degradation, etc. Achieve the effect of improving biodegradability and reducing COD

Inactive Publication Date: 2012-12-19
DALIAN UNIV OF TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

In the integrated equipment, the processes of adsorption, electrolysis and catalytic oxidation are carried out at the same time, which solves the problems of high investment and operation costs in the separation of traditional adsorption and regeneration equipment, chemical regeneration, and thermal regeneration; (2) Make the electrolytic reactor packing have adsorbent, micro The triple functionality of electrodes and catalysts solves the problems of slow reaction rate, low space-time efficiency, low current efficiency and low pollutant degradation efficiency in traditional electrolytic reactors

Method used

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  • In-situ adsorption-microelectrolysis-catalytic oxidation sewage treatment equipment and method

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Embodiment 1

[0017] This technology is used for advanced treatment and reuse of sewage from petrochemical refineries. The cathode and anode of the equipment used are both graphite, the power supply is DC power supply, and activated carbon and loaded iron zeolite are used as mixed fillers. The ratio of mixed fillers is: activated carbon / loaded iron zeolite = 1 / 3, iron / zeolite = 1 / 200, The particle size is 10 mesh. The COD content of raw oil refinery sewage is below 100mg / L after conventional secondary biological treatment. The sewage after secondary biological treatment continuously enters the equipment for advanced treatment. The hydraulic retention time is 1 hour, and the COD content of the effluent is 20-30mg / L, which is lower than the primary reclaimed water quality standard of 40mg in the guidelines for the management of sewage reuse in oil refining and chemical enterprises. / L, power consumption is 0.6KWH / ton of water. The water can be reused as circulating water for hydration. ...

Embodiment 2

[0019] This technology is used for the advanced treatment of oilfield wastewater. The anode of the equipment used is graphite, the cathode is carbon steel, the power supply is DC power supply, and activated carbon and quartz sand are used as mixed fillers. The mixed filler ratio is: activated carbon / quartz sand = 1 / 2, and the particle size is 10-20 mesh. The original oily sewage is removed from the oil removal tank, and then pretreated by the sand filtration process, the oil content is below 100mg / L. The pretreated sewage continuously enters the equipment for advanced treatment. The hydraulic retention time is 1 hour, the oil content in the effluent is 2-3 mg / L, which is 5 mg / L lower than the oilfield reuse water standard, and the power consumption is 0.6KWH / ton of water. The water can be re-injected into the oil field after desalination.

Embodiment 3

[0021] This technology is used for the advanced treatment of domestic sewage. The cathode and anode of the equipment used are both graphite, the power supply is DC power supply, and activated carbon and sulfonated coal are used as mixed fillers. The ratio of mixed fillers is: activated carbon / sulfonated coal = 1 / 2, and the particle size is 10-16 mesh. The domestic sewage with a COD of 200-300mg / L can be reduced to about 100mg / L after sedimentation and biochemical treatment. The sewage after the secondary biological treatment continuously enters the equipment for advanced treatment, the hydraulic retention time is 1 hour, the COD of the effluent is less than 50mg / L, which meets the national urban sewage treatment plant reclaimed water reuse standard, and the power consumption is 0.5KWH / ton of water. This water can be reused as reclaimed water.

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Abstract

The invention discloses in-situ adsorption-microelectrolysis-catalytic oxidation sewage treatment equipment and method, belonging to the technical field of sewage treatment in environment engineering. The in-situ adsorption-microelectrolysis-catalytic oxidation sewage treatment equipment is characterized in that adsorption equipment, electrolysis equipment and catalytic oxidation equipment are integrated so as to gather enable pollutants to be gathered from a low-concentration water phase onto an adsorbent; by using the favorable electric conductivity, the adsorbent is used as a complexly polarized three-dimensional electrode to form countless micro electrolytic baths, so that the organic pollutants are electrolyzed while organic matters are adsorbed, and adsorption active sites are continuously regenerated; and by utilizing an electric insulation material, the three-dimensional electrode is complexly polarized and has a high-class oxidation catalyst function at the same time, so that a gas oxidant dissolved in water and an oxidant generated by side reaction of the electrode form a high-class oxidant to efficiently remove the organic pollutants. According to the equipment and the method, the problems of slow reaction speed, low space-time efficiency, low current efficiency and low pollutant degradation efficiency in the conventional electrolytic reactors are solved, and an excellent market prospect is provided.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment in environmental engineering, and relates to sewage treatment equipment and a method for adsorption electrolytic catalytic oxidation. Background technique [0002] Refractory organic pollutants come from a wide range of sources. It includes not only refractory organic pollutants discharged from various pollution sources in the traditional sense, but also refractory pollutants secondary to biochemical treatment secondary effluent, biodegradation process refractory pollutants and refractory pollutants metabolized by organisms themselves. These refractory organic pollutants are extremely harmful to the soil and water environment. For the treatment of refractory organic wastewater, the most effective treatment technologies are adsorption treatment and advanced oxidation processes (AOPs). The adsorption treatment technology is simple and can make the wastewater meet very low discharge standa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F1/72C02F1/28
Inventor 周集体张爱丽金若菲
Owner DALIAN UNIV OF TECH
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