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Treatment method of nanofiltration concentrated water of refuse leachate

A technology for waste permeate and a treatment method, which is applied in the field of waste permeate nanofiltration concentrated water treatment, can solve the problems of difficulty in meeting the discharge index requirements, high evaporation process costs, unbearable for enterprises, etc. The effect of strong resistance to water impact and power saving

Inactive Publication Date: 2017-08-11
SHANDONG LONGANTAI ENVIRONMENTAL PROTECTION SCI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Commonly used processes are evaporation and advanced oxidation. The evaporation process is expensive and generates solid waste; while the commonly used single advanced oxidation process is not only difficult to meet the emission target requirements, but also has high treatment costs, which are unaffordable for enterprises.

Method used

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  • Treatment method of nanofiltration concentrated water of refuse leachate

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Experimental program
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Effect test

Embodiment 1

[0030] Nanofiltration concentrated water produced during the treatment of waste permeate in a waste incineration plant: the COD is 3600mg / L, and the salt content is 34000mg / L.

[0031] The treatment method provided by the present invention is used for treatment: the waste water is adjusted to 2.0 by adding sulfuric acid, and then enters the iron-carbon micro-electrolysis unit 1 for initial oxidation. The oxidation reaction takes 120 minutes. During the reaction, acid is added to control the pH of the effluent to be 3.0, and the iron-carbon Add 10‰ hydrogen peroxide to the micro-electrolysis effluent and enter the Fenton oxidation unit 2 for secondary oxidation. The oxidation time of the wastewater in the Fenton oxidation unit 2 is 60 minutes. The Fenton oxidation effluent is added with lye to adjust the pH to 9.0 and then enters the flocculation and sedimentation unit 3. Ferric ions in the wastewater form iron hydroxide flocs to precipitate, and the precipitate is discharged fr...

Embodiment 2

[0034] Nanofiltration concentrated water produced during the treatment of waste permeate in a waste treatment plant: COD is 1600mg / L, and salt content is 21800mg / L.

[0035] The treatment method provided by the present invention is used for treatment: the wastewater is adjusted to 2.5 by adding sulfuric acid, and then enters the iron-carbon micro-electrolysis unit 1 for initial oxidation, and the oxidation reaction is 60 minutes. During the reaction, acid is added to control the pH of the effluent to be 3.5, and the iron-carbon Add 4‰ hydrogen peroxide to the micro-electrolysis effluent and enter the Fenton oxidation unit 2 for secondary oxidation. The oxidation time of the wastewater in the Fenton oxidation unit 2 is 30 minutes. The Fenton oxidation effluent is added with lye to adjust the pH to 8.5 and then enters the flocculation and sedimentation unit 3. Ferric ions in the waste water form ferric hydroxide flocs to precipitate, and the precipitate is discharged from the bot...

Embodiment 3

[0038] The concentrated nanofiltration water produced during the treatment of waste permeate in a waste incineration plant has a COD of 800mg / L and a salt content of 19000mg / L.

[0039] The treatment method provided by the present invention is used for treatment: the wastewater is adjusted to 3.0 by adding sulfuric acid, and then enters the iron-carbon micro-electrolysis unit 1 for initial oxidation, and the oxidation reaction is 30 minutes. During the reaction, acid is added to control the pH of the effluent to be 4.0, and the iron-carbon Add 2‰ hydrogen peroxide to the micro-electrolysis effluent and enter the Fenton oxidation unit 2 for secondary oxidation. The oxidation time of the wastewater in the Fenton oxidation unit 2 is 30 minutes. The Fenton oxidation effluent is added with lye to adjust the pH to 8.0 and then enters the flocculation and sedimentation unit 3. Ferric ions in the wastewater form iron hydroxide flocs to precipitate, and the precipitate is discharged fro...

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Abstract

A treatment method of nanofiltration concentrated water of refuse leachate comprises following steps: the nanofiltration concentrated water is subjected to primary oxidation with an iron-carbon micro-electrolysis technology; after a certain amount of hydrogen peroxide is added to effluent obtained through the primary oxidation, residual acidity of the iron-carbon micro-electrolysis technology and produced ferrous ions are utilized to enable a reaction system to be converted into Fenton oxidation for secondary oxidation; alkali is added to effluent obtained after Fenton oxidation for PH back regulation, flocculent precipitate is subjected to mud-water separation, and after separation, an ozone catalyst is added to a supernatant for third-time oxidation; an electrolytic catalyst is added to effluent obtained after ozone catalytic oxidation for fourth-time oxidation, and wastewater obtained after electrolytic catalytic oxidation is discharged up to the standard. The treatment method has the advantages of deep treatment, flexible operation and low treatment cost.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a method for treating waste permeate nanofiltration concentrated water by using a combined process of iron-carbon internal electrolysis + Fenton oxidation + ozone catalytic oxidation + electrolytic catalytic oxidation. Background technique [0002] Landfill leachate is high-concentration organic wastewater produced by solid waste under the action of physics, chemistry and microorganisms due to leaching of atmospheric precipitation and immersion of surface water and groundwater after landfill treatment. Landfill leachate comes from three aspects: one is atmospheric rainfall (snow), surface runoff and groundwater intrusion; Pollutants in landfill leachate mainly come from: a large amount of soluble organic matter and inorganic matter contained in the waste itself; organic matter and inorganic matter dissolved in the leachate during the immersion of rainwater, surface water...

Claims

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Application Information

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IPC IPC(8): C02F9/06
CPCC02F1/461C02F1/66C02F1/722C02F1/725C02F1/78C02F9/00
Inventor 代春龙邹宗海魏明勇
Owner SHANDONG LONGANTAI ENVIRONMENTAL PROTECTION SCI TECH CO LTD
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