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Aged refuse participating organic waste water electro-Fenton treatment method

A technology for mineralizing garbage and organic wastewater, applied in the field of environmental pollution control, can solve the problems of difficult removal of iron ions, low pollutant removal efficiency, etc., and achieve the effect of enhancing treatment effect, strong treatment capacity and saving electric energy.

Active Publication Date: 2013-01-30
苏州弘宇节能减排工程有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is: to overcome the deficiencies in the prior art that iron ions are difficult to remove and the removal efficiency of pollutants is low, and provide a method for electro-fenton treatment of organic wastewater involving mineralized garbage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Add dye orange II wastewater with a concentration of 25mg / L into the electrolytic cell, and then add mineralized waste that has been crushed through a 100-mesh sieve and has a landfill age of 8 years. The solid-liquid ratio of the mineralized waste and waste water is 1:1000. Add 0.1mL H to 1 liter of wastewater 2 o 2 (30%, mass fraction), the anode electrode of the electrolytic cell is an iron sheet electrode, the cathode electrode is a graphite electrode, the electrolytic cell is connected to a current of 5mA, and after every 20 minutes, it is disconnected for 40 minutes, and the cycle operation is continued throughout the process. The rotation speed is 150r / min. After a total time of 6 hours, the organic matter in the wastewater is oxidized and degraded, precipitated and separated, and the concentration of pollutants in the wastewater is analyzed. The removal rate reaches 98.2%, and the concentration of iron ions is 1.8mg / L.

[0025] For the same wastewater, under th...

Embodiment 2

[0028] Add dye acid red wastewater with a concentration of 30mg / L into the electrolytic cell, and then add mineralized garbage that has been crushed through a 50-mesh sieve and has a landfill age of 15 years. The solid-liquid ratio of mineralized garbage and wastewater is 1:500. Add 0.2 mL H to 1 liter of wastewater 2 o 2 (30%, mass fraction), the anode electrode of the electrolytic cell is an iron sheet electrode, the cathode electrode is a graphite electrode, the current of the electrolytic cell is 40mA, and after every 15min, it is disconnected for 30min, and the cycle operation is continued throughout the process. The rotation speed is 50r / min, and after a total time of 3 hours, the organic matter in the wastewater is oxidized and degraded, precipitated and separated, and the concentration of pollutants in the wastewater is analyzed, and the removal rate reaches 98.8%. After precipitation and separation, the solid was left, and then the same waste water was added, and the...

Embodiment 3

[0032]Continuously feed phenol waste water with a concentration of 10mg / L into the electrolytic cell with inlet and outlet, and then add the mineralized waste that has been landfilled for 8 years crushed through a 50-mesh sieve, the solid-liquid solid-liquid of the mineralized waste and the wastewater in the electrolytic cell The ratio is 1:1000, mix H at the inlet 2 o 2 (30%, mass fraction), the dosage is to mix 0.1mL per liter of wastewater, the anode electrode of the electrolytic cell is an iron sheet electrode, and the cathode electrode is a graphite electrode. The current of the electrolytic cell is 40mA, and after every 20min, it is disconnected for 40min , stirring continuously during the whole process, the stirring speed is 100r / min, the residence time of the wastewater in the electrolytic cell is 5h, the organic matter in the wastewater is oxidized and degraded, after overflow separation, the concentration of pollutants in the effluent is analyzed, after a long time o...

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PUM

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Abstract

The present invention provides an aged refuse participating organic waste water electro-Fenton treatment method, which comprises the following steps that: organic waste water is added to an electrolyte tank, and aged refuse with a landfill age of 8-15 years is added, and per liter of the waste water is added with 0.1-0.2 mL of a H2O2 solution, wherein an anode electrode of the electrolyte tank is an iron sheet electrode, and a cathode electrode is a graphite electrode; a current of the electrolyte tank is switched on to 5-40 mA, wherein switching-off is performed for 30-40 min after every switching-on is performed for 15-20 min, cycle operation is performed, constant stirring is performed during the whole process, and a stirring rotation speed is 50-150 r / min; after the total time of 3-6 h, organics in the waste water are subjected to oxidation degradation, precipitate is separated, the discharged waste water meets the standard; and waste water is added again, is treated by using the same method, and can be continuously degraded, wherein the iron electrode is gradually oxidized and enters the solution during the electrolysis, and reacts with the added H2O2 to generate a strong oxidant .OH to promote pollutant decomposition.

Description

technical field [0001] The invention relates to the technical field of environmental pollution control, in particular to an electro-fenton method for treating organic waste water with the participation of mineralized garbage. Background technique [0002] Discovered by Fenton in 1894, ferrous ion (Fe 2+ ) to hydrogen peroxide (H 2 o 2 ) catalyst, which produces a free radical with high oxidizing ability, (hydroxyl radical, OH), and finally oxidizes the organic matter in the wastewater into carbon dioxide and water to eliminate pollution. Fe produced by electrochemical method 2+ and H 2 o 2 As a continuous source we call it the electrolytic Fenton method. When the electrolyzer is energized, the iron anode loses two electrons and is oxidized to Fe 2+ , Fe 2+ with added H 2 o 2 A Fenton reaction occurs to generate OH. [0003] In this system, besides OH, the factors leading to the degradation of organic matter also include Fe 2+ , Fe 3+ , although some Fe 2+ , Fe ...

Claims

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Application Information

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IPC IPC(8): C02F3/34
Inventor 马建锋邹静姚超李定龙
Owner 苏州弘宇节能减排工程有限公司
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