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Electrocatalytic wastewater treatment system

A wastewater treatment system, electrocatalysis technology, applied in water/sewage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of increasing system energy consumption and device volume, and reduce wastewater treatment Cost, improvement of reaction efficiency, and time-saving effect

Active Publication Date: 2014-01-01
SUZHOU UNIV
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Problems solved by technology

However, in actual use, due to the diversity of waste water / sewage, the complexity of composition and the variability of concentration, when the above-mentioned device is applied to the treatment process of some waste water, it often encounters It is difficult to process it within the required technical standard within 20 minutes. At this time, the method of prolonging the catalytic electrolysis reaction time has to be adopted to meet the technical requirements, which correspondingly increases the energy consumption of the system operation and the volume of the device. question

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Analysis of the treatment effect of the effluent after biochemical treatment of oil refinery wastewater.

[0059] Refining wastewater is refractory wastewater. The refining process consumes a lot of water, and the water quality of the discharged wastewater is complex and highly volatile. Using the above-mentioned wastewater treatment system with a treatment capacity of 60L / h, a 30-day on-site continuous operation test was carried out on the wastewater discharged from an oil refinery after biochemical treatment. The results show that: when the influent water quality index COD fluctuates between 80.0-360mg / L, the average value is 220mg / L; when the ammonia nitrogen concentration is around 40.0mg / L, the control reaction time is 20min, and the COD of the system effluent after the reaction is lower than 50mg / L, the average removal rate can reach 80.1%; the concentration of ammonia nitrogen in the effluent is lower than 4mg / L, and the removal rate of ammonia nitrogen can reach...

Embodiment 2

[0061] Analysis of the treatment effect of printing and dyeing wastewater after biochemical treatment.

[0062] The printing and dyeing industry consumes a lot of water, the water quality is complicated, and the concentration of pollutants fluctuates greatly. Using the above-mentioned wastewater treatment system with a treatment capacity of 60L / h, a 3-week on-site continuous operation test was carried out on the biochemical discharge water of a number of printing and dyeing wastewater. The main water quality indicators of the experimental water are: the COD fluctuation of the influent water quality index is between 80-120mg / L, and the average value is 100mg / L; the chroma is 40-80, and the average value is 60. The reaction time was controlled at 20 min during the experiment. The results of water discharge show that when the dielectric barrier plasma generator 16 is not working, the average COD removal rate of the system can still reach 70%, and the chroma removal rate is close...

Embodiment 3

[0064] Analysis of the effect of advanced treatment on effluent after biochemical treatment of petrochemical wastewater.

[0065]Petrochemical or coking wastewater has the remarkable characteristics of oxidation and refractory degradation. It is difficult to effectively degrade it by traditional advanced oxidation methods such as ozone, electrolysis, and Fenton method. Using a laboratory small-scale electrocatalysis experimental device (note: the effective volume of the experimental device is 400mL, there are 3 pairs of 316L stainless steel working electrodes 14, the distance between each pair of working electrodes 14 is 2cm, and the length of the reaction tank is 10cm) to measure the presence or absence of plasma The comparative results of the flow-time electrocatalytic wastewater treatment system on petrochemical wastewater under different conditions are shown in Table 1. The test water quality is: the COD fluctuation of the influent varies between 180-220mg / L, and the aver...

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Abstract

The invention provides an electrocatalytic wastewater treatment system which comprises a reaction tank, an electrolysis device, a working electrode, an electrolysis gas supply system and a catalytic material, wherein a dielectric barrier plasma generator is arranged between an aeration pipe and an air pump; the dielectric barrier plasma generator is provided with a gas inlet and a gas outlet; the gas inlet is connected with the air pump; the air pump supplies air to the plasma generator; and the gas outlet is connected with the aeration pipe through a plasma stream transmission main pipe. The dielectric barrier plasma generator arranged between the air pump and the aeration pipe provides constant circulation power for the catalytic material in the reaction tank and also provide the low-temperature plasma stream for the working electrode and catalytic material so as to accelerate the electrochemical reaction process between active oxygen substances in the catalytic process, thereby enhancing the reaction efficiency of the wastewater treatment system, saving the time and lowering the wastewater treatment cost.

Description

technical field [0001] The invention belongs to the field of wastewater purification, in particular to an electrocatalytic wastewater advanced treatment system. Background technique [0002] Saving resources and protecting the environment is a basic national policy of our country. During the "Twelfth Five-Year Plan" period, the national urban sewage treatment recycling rate will reach the target of 10%, and more than 7 billion m of fresh water resources can be saved every year. 3 , which can effectively alleviate the problem of water shortage in my country, especially in arid areas, so wastewater reuse has important practical significance. [0003] At present, the total sewage discharge in the country is more than 70 billion tons, and the national recycled water consumption is only 1.66 billion m 3 , accounting for only 2% of the national waste / sewage discharge, which is far from the goal of 10%. Therefore, to achieve this goal not only depends on macro-control factors su...

Claims

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Application Information

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IPC IPC(8): C02F1/461
Inventor 刘德启曾梦丹张聿平
Owner SUZHOU UNIV
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