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Leachate membrane treatment method capable of reducing yield of concentrated solution

A technology of leachate and membrane treatment, applied in the direction of contaminated groundwater/leachate treatment, water/sewage treatment, chemical instruments and methods, etc., can solve the problem of large concentrate output, inability to fully consume economic benefits, and reduce membrane concentration Liquid production and other issues, to achieve the effect of reducing production burden, saving reverse osmosis membrane advanced treatment process, and reducing maintenance costs

Inactive Publication Date: 2019-08-09
XINGOU GARBAGE POWER GENERATION CO LTD (WUHAN) SHENZHEN ENERGY ENVIRONMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The invention provides a leachate membrane treatment method that can reduce the output of concentrated liquid, which aims to reduce the concentration of pollutants from the source, reduce the membrane advanced treatment process, and reduce the output of membrane concentrated liquid, so as to solve the problem of excessive concentrated liquid output in waste incineration power plants , the problem of lower economic benefits caused by inability to completely internal consumption

Method used

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  • Leachate membrane treatment method capable of reducing yield of concentrated solution

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Effect test

Embodiment 1

[0026] A leachate membrane treatment method that can reduce the concentrate output, it comprises the steps:

[0027] 1) After the ultrafiltration product water tank collects the ultrafiltration product water, according to the ultrafiltration product water volume and pH situation, add hydrochloric acid to adjust the pH value to between 4.5-5, and enter the next process after reaching the reaction conditions of the Fenton reaction;

[0028] 2) After receiving the ultrafiltration product water in the Fenton reaction tank, add ferrous sulfate and hydrogen peroxide to stir, wherein, the mass ratio of hydrogen peroxide dosage to ultrafiltration COD content is 1.2:1, and the dosage of ferrous sulfate is hydrogen peroxide The molar ratio of the dosage is 1:10, and the COD in the ultrafiltration product water is degraded from 500-600mg / L to below 200mg / L;

[0029] 3) It will have a greater oxidation effect on the subsequent plate ultrafiltration membrane and nanofiltration system. Ther...

Embodiment 2

[0031] A leachate membrane treatment method that can reduce the concentrate output, it comprises the steps:

[0032] 1) After the ultrafiltration product water tank collects the ultrafiltration product water, according to the ultrafiltration product water volume and pH situation, add hydrochloric acid to adjust the pH value to 3.5-4.5, and enter the next process after reaching the reaction conditions of the Fenton reaction;

[0033] 2) After receiving the ultrafiltration product water in the Fenton reaction tank, add ferrous sulfate and hydrogen peroxide to stir, wherein, the mass ratio of hydrogen peroxide dosage to ultrafiltration COD content is 1.3:1, and the dosage of ferrous sulfate is hydrogen peroxide The molar ratio of the dosage is 1:10, and the COD in the ultrafiltration product water is degraded from 500-600mg / L to below 200mg / L;

[0034] 3) It will have a greater oxidation effect on the subsequent plate ultrafiltration membrane and nanofiltration system. Therefore,...

Embodiment 3

[0036] A leachate membrane treatment method that can reduce the concentrate output, it comprises the steps:

[0037] 1) After the ultrafiltration product water tank collects the ultrafiltration product water, according to the ultrafiltration product water volume and pH situation, add hydrochloric acid to adjust the pH value to 2.5-3.5, and enter the next process after reaching the reaction conditions of the Fenton reaction;

[0038]2) After receiving the ultrafiltration product water in the Fenton reaction tank, add ferrous sulfate and hydrogen peroxide to stir, wherein, the mass ratio of hydrogen peroxide dosage to ultrafiltration COD content is 1.2:1, and the dosage of ferrous sulfate is hydrogen peroxide The molar ratio of the dosage is 1:10, and the COD in the ultrafiltration product water is degraded from 500-600mg / L to below 200mg / L;

[0039] 3) It will have a greater oxidation effect on the subsequent plate ultrafiltration membrane and nanofiltration system. Therefore, ...

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Abstract

The invention relates to a leachate membrane treatment method capable of reducing the yield of a concentrated solution. The leachate membrane treatment method comprises the following steps: S1, addinghydrochloric acid into ultra-filtered produced water collected by an ultra-filtered produced water tank to adjust a pH value to meet the Fenton reaction requirement; S2, adding hydrogen peroxide andferrous sulfate into the ultra-filtered produced water after the pH is regulated in a Fenton reaction tank, executing Fenton reaction to reduce the COD of the ultra-filtered produced water to be belowa set value; S3, adding a reducing agent to remove the strong oxidizing substances left after the reaction, then feeding the water into a plate-type ultrafiltration device for filtering treatment, enabling the produced water to enter an intermediate water tank for storage, starting the nanofiltration system for nanofiltration treatment after the starting liquid level of the nanofiltration systemis reached, enabling the pH of the ultra-filtered produced water to be regulated back to be medium, and then executing up-to-standard discharging. The method has the advantages that the produced waterafter the Fenton reaction and the plate type ultrafiltration device can reach the discharge standard after passing through the nanofiltration system, so that a next reverse osmosis membrane treatmentprocess is omitted, the yield of the concentrated solution is greatly reduced, and the investment cost is greatly reduced.

Description

technical field [0001] The invention belongs to the field of landfill leachate membrane treatment in waste incineration power plants, and in particular relates to a leachate membrane treatment method capable of reducing the output of concentrated liquid. Background technique [0002] As the country has higher and higher requirements for the environmental protection industry and water pollution control, the domestic waste leachate treatment process and drainage requirements have gradually increased. The current domestic waste treatment and drainage standards mainly include "Pollution Control Standards for Domestic Waste Landfill Sites" (GB16889- 2008) and "Comprehensive Wastewater Discharge Standard" (GB8978-1996), in order to meet the above two types of standards, the current mainstream process of leachate adopts ultrafiltration, nanofiltration and reverse osmosis membrane separation advanced treatment process, after ultrafiltration, The effluent after the combined process o...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F103/06
CPCC02F9/00C02F2103/06C02F2305/026C02F1/66C02F1/722C02F1/725C02F1/70C02F1/444C02F1/442
Inventor 袁洪涛刘万鹏方生龙丁鹏李聪孔维鹏胡永辉
Owner XINGOU GARBAGE POWER GENERATION CO LTD (WUHAN) SHENZHEN ENERGY ENVIRONMENT CO LTD
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