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Method for oxidation treatment of sewage by novel Fe-C microelectrolysis-Fenton reagent

A technology of Fenton's reagent and sewage treatment method, which is applied in the fields of oxidized water/sewage treatment, chemical instruments and methods, water/sewage treatment, etc., can solve the problems of long precipitation time, etc. The effect of reducing consumption

Active Publication Date: 2010-05-12
杨忠刚
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because a large amount of iron ion hydroxyl complexes with different valences remain in the reaction, the flocs reacted by Fenton's reagent are lighter and the precipitation time is longer.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The high-concentration printing and dyeing sewage of Shandong Lanyan Co., Ltd., COD3500mg / l, chroma 10200 times, and pH greater than 12, take 2.5m3 of printing and dyeing sewage and use 20% H2SO4 to adjust the pH to less than 3, from the bottom of the micro-electrolytic pool, through the blast furnace heavy slag into the The sewage treatment layer composed of coke and blast furnace gas ash flows through for 1 hour, air: water = 5: 1, aerated for 10 minutes, flows into the Fenton reagent oxidation tank, and the COD quality in the sewage entering the Fenton reagent oxidation tank Hydrogen peroxide was added at a ratio of 0.5:1, and Fenton's reagent was oxidized for 2 hours. COD degradation rate is 70.1%, chroma degradation rate is 80%. Then Ca(OH) 2 After adjusting the pH value to 7-9, air: water = 5: 1, and aerate for 30 minutes to make Fe 2+ converted to Fe 3+(The color of the solution changes from blue to yellowish brown). The COD degradation rate is 90.1%, and the ...

Embodiment 2

[0032] Shandong Xinhua Pharmaceutical Co., Ltd. produced nitrosation mother liquid sewage produced by caffeine, COD37500mg / l, NH3-N1890mg / l, pH less than 5, took 25m3 of sewage and adjusted the pH to less than 3 with 20% H2SO4, and treated the bottom of the pool with micro-electrolysis, and then Blast furnace heavy slag enters the three-layer sewage treatment layer consisting of coke and blast furnace gas ash, and the flow time is 4 hours. Air: water = 5: 1, aeration 15 minutes into the Fenton reagent oxidation tank, hydrogen peroxide is added according to the mass ratio of hydrogen peroxide to the COD in the sewage entering the Fenton reagent oxidation tank of 1: 1, and the Fenton reagent oxidation reaction is 3 hours. COD degradation rate was 45.7%, NH3-N degradation rate was 40%. Then Ca(OH) 2 After adjusting the pH value to 7-9, air: water = 10: 1, and aerate for 1 hour to make Fe 2+ converted to Fe 3+ (The color of the solution changes from blue to yellowish brown). Th...

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Abstract

The invention relates to a sewage treatment method, in particular to a method for comprehensively utilizing heavy slag and gas ashes of a blast furnace. The method is characterized in that a novel Fe-C microelectrolysis-Fenton reagent consisting of the heavy slag and gas ashes of the blast furnace is used for oxidation treatment of the organics in sewage; subsequently the exposure of gas is utilized to effectively remove the suspension organics and colloid generated due to the oxidation treatment of the Fe-C microelectrolysis-Fenton reagent, thus removing the contamination in the sewage and resolvable organics difficult for biodegradation. The method reduces the production cost for sewage treatment, simultaneously utilizes the heavy slag and gas ashes of the blast furnace comprehensively, is environment-friendly and economical, and has greater application and development prospects.

Description

technical field [0001] The invention relates to a sewage treatment method, in particular to the comprehensive utilization of blast furnace heavy slag and blast furnace gas ash. Use blast furnace heavy slag and blast furnace gas ash to form a new iron-carbon micro-electrolysis-Fenton reagent to oxidize organic matter in sewage, and then use aeration to efficiently remove the organic matter in the sewage due to iron-carbon micro-electrolysis-Fenton reagent oxidation treatment Suspended organic matter and colloids, thereby removing pollutants and dissolved organic matter that are difficult to biodegrade in sewage. technical background [0002] The micro-electrolysis method, also known as the internal electrolysis method, zero-valent iron method, and iron-carbon method, is a sewage treatment method that has been widely studied and applied. The Fe / C micro-electrolysis columns (towers) currently used for sewage treatment are filled with mostly Based on the mixture of unmodified m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06C02F1/461C02F1/72
Inventor 杨忠刚
Owner 杨忠刚
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