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Fenton oxidation effluent post-treatment method

A technology of Fenton oxidation and treatment steps, applied in the direction of oxidized water/sewage treatment, water/sewage treatment, chemical instruments and methods, etc., can solve the problem of inability to ensure that the sewage will no longer be reversed, and the inability to completely remove iron ions in the sewage system, etc. problem, to achieve the effect of low cost, less drug dosage, and elimination of anti-color

Pending Publication Date: 2019-04-16
光大水务科技发展(南京)有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for post-treatment of Fenton oxidation effluent, aiming to solve the problem that the post-treatment method of Fenton reaction in the prior art cannot completely remove the residual iron ions in the sewage system, and cannot guarantee the treatment of the obtained sewage. No more anti-color problems

Method used

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Examples

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Embodiment 1

[0038] Provide 1L of mud-water mixture after Fenton oxidation reaction, wherein the pH of the mud-water mixture is 6.54; carry out aeration treatment on the mud-water mixture so that the dissolved oxygen concentration of the mixture is ≥5mg / L, and the aeration time is 10 minutes , and then add slaked lime to adjust the mud-water mixture, mix and react for 5 minutes, and adjust to pH 9.0; then add 1% (1 mL) flocculant PAM and mix evenly, and settle for 20 minutes to obtain a treatment solution.

Embodiment 2

[0040] Provide 1L of mud-water mixture after Fenton oxidation reaction, wherein the pH of the mud-water mixture is 6.54; carry out aeration treatment on the mud-water mixture so that the dissolved oxygen concentration of the mixture is 5 mg / L, and the aeration time is 15 minutes , and then add slaked lime to adjust the mud-water mixture, mix and react for 5 minutes, and adjust to pH 9.0; then add 1% (1 mL) flocculant PAM and mix evenly, and settle for 25 minutes to obtain a treatment solution.

Embodiment 3

[0042] Provide 1L of mud-water mixture after Fenton oxidation reaction, wherein the pH of the mud-water mixture is 6.54; carry out aeration treatment on the mud-water mixture so that the dissolved oxygen concentration of the mixture is 5 mg / L, and the aeration time is 20 minutes , and then add slaked lime to adjust the mud-water mixture, mix and react for 5 minutes, and adjust to pH 9.0; then add 1% (1 mL) flocculant PAM and mix evenly, and settle for 20 minutes to obtain a treatment solution.

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Abstract

The invention provides a Fenton oxidation effluent post-treatment method, which comprises the following reaction steps of: carrying out aeration treatment on sludge-water mixed solution after Fenton oxidation reaction, adding alkali liquor, uniformly mixing, precipitating and separating to obtain treatment liquid without inverse color. By the adoption of the Fenton oxidation effluent post-treatment method, sludge-water mixture obtained after the Fenton oxidation reaction is subjected to the aeration treatment, so that all dissolved ferrous iron ions in the sludge-water mixture are oxidized into ferric iron ions, the alkali liquor is added to guarantee that the ferric iron ions, anions in the solution and various extracellular polymer complexes are combined, complex of soluble iron in water(such as amino acid chelated iron, EPS-chelated iron) is completely removed by using complexing point location and netting nature of sludge, residual iron ions in a sewage system after the Fenton reaction treatment are completely removed, so that effluent of a Fenton process is without inverse color, the effluent is guaranteed to stably reach a standard for discharge, dosage of added medicament is small, the cost is low, the operation and management are convenient, the influence on a rear-end process is avoided, and meanwhile, the sludge-water separation performance is improved.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a method for post-treatment of Fenton oxidation effluent. Background technique [0002] Under the current background of increasing citizens' awareness of environmental protection, increasingly strict national environmental protection laws and regulations, and continuous advancement of energy conservation and emission reduction work, the advanced treatment of sewage and the standard treatment of refractory organic sewage have gradually become the focus of attention in the field of water treatment in my country and the world. [0003] Water pollution is water that reduces or loses the use value of water caused by harmful chemicals and pollutes the environment. Acids, alkalis, oxidants, and compounds such as copper, cadmium, mercury, and arsenic in sewage, as well as organic poisons such as benzene, dichloroethane, and ethylene glycol, will kill aquatic organisms, affect drinking wat...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F101/20
CPCC02F1/5236C02F1/66C02F1/72C02F7/00C02F2101/203
Inventor 于豹梁华杰王冠平安平林石伟刘晓静
Owner 光大水务科技发展(南京)有限公司
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