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Membrane filtration and Fenton oxidation combined sewage treatment method and system thereof

A sewage treatment method, Fenton oxidation technology, applied in special compound water treatment, water/sewage treatment, degassed water/sewage treatment, etc., can solve unrepresentative data and conclusions, unable to stabilize membrane system operation, and effluent quality Difficult to control and other problems, to achieve the effect of saving the cost of chemicals, promoting Fenton-like oxidation, and reducing the dosage of ferrous iron

Pending Publication Date: 2018-05-18
CITIC ENVIROTECH GUANGZHOU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] 2. Microscopic air bubbles generated during the Fenton reaction may attach to the flocs, creating buoyancy and hindering gravity sedimentation
[0010] 3. Due to some fundamental limitations of the sedimentation process, the quality of the effluent is difficult to control, and it is easy to deteriorate due to load impact
However, current research is quite limited, mainly limited to small-scale experiments dealing with simulated pollutants
There are many differences and deficiencies in the pilot-scale research with more reference value, such as: using membrane filtration as pretreatment of downstream Fenton technology, unrepresentative data and conclusions due to short experimental time, and inability to stabilize the membrane. system operation problem

Method used

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  • Membrane filtration and Fenton oxidation combined sewage treatment method and system thereof
  • Membrane filtration and Fenton oxidation combined sewage treatment method and system thereof
  • Membrane filtration and Fenton oxidation combined sewage treatment method and system thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] attached figure 2 The sewage treatment system shown in combination of membrane filtration and Fenton oxidation specifically includes an acid adjustment tank 1, a Fenton reaction tank 2, a stripping tank 3, an alkali adjustment tank 4, a membrane pool 5 and a water production tank 10 connected in sequence. A reflux pump 6 is arranged between the membrane pool 5 and the acid adjustment tank 1, a blower 7 is arranged on the membrane pool 5 and the blow-off tank 3, and an acid addition pump is arranged on the acid adjustment tank 1 11. Ferrous pump 12 and water inlet pump 13, said Fenton reaction tank 2 is provided with H 2 o 2 Pump 21, described alkali-adjusting tank 4 is provided with alkali-adding pump 41, is provided with intermediate water tank 8 between described alkali-adjusting tank 4 and membrane pool 5, and the mixed solution after alkali-adjusting flows into intermediate water tank and stirs, then passes through The lift pump 9 installed on the intermediate wa...

Embodiment 2

[0053] A system provided by Embodiment 1 and figure 1 The traditional Fenton pilot system shown is a method for parallel treatment of wastewater with a COD value of 80mg / L in an industrial wastewater treatment plant in Nansha, Guangzhou:

[0054] The operating parameters of this invention and the traditional Fenton pilot test are shown in Table 1.

[0055]

[0056]

[0057] as attached image 3 Shown, this invention pumps water into the acid adjustment tank of 180L by the water inlet pump, and the water intake is 150L / h, then in the acid adjustment tank, the pH is adjusted to 2-6 by the acid pump, and the ferrous pump is used to Add Fe in the form of ferrous sulfate to the acid adjustment tank 2+ After that, it enters the 180L Fenton reaction tank, and then passes through the H 2 o 2 Pump to add H to the Fenton reaction tank 2 o 2 , H 2 o 2 The ratio of chemical addition to influent COD can range from 0.1:1 to 5:1, ferrous iron to H 2 o 2 The addition ratio of ...

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Abstract

The invention relates to a membrane filtration and Fenton oxidation combined sewage treatment method and a system thereof. The membrane filtration and Fenton oxidation combined sewage treatment methodspecifically comprises: S1, Fenton oxidation: adjusting the pH value of influent to 2-6, adding a ferrous agent, adding H2O2, carrying out Fenton oxidation, blowing off the mixed liquid obtained after the Fenton reaction, and adjusting the pH value to 7-10; and S2, membrane filtration: carrying out membrane filtration on the mixed liquid after alkali adjustment, wherein the iron mud trapped by the membrane in the membrane pool after the filtering refluxes to the step S1 according to the influent flow rate of 50-700% so as to be used, and the filtered water can enter a water production box soas to be stored or directly discharged. According to the present invention, the method and the system stable run, can effectively enhance the adsorption removal effect, optimize the quality of the effluent, save the agent consumption and the solid waste treatment cost, and reduce the environmental pressure.

Description

technical field [0001] The invention relates to a sewage treatment method and system combining membrane filtration and Fenton oxidation, in particular to the high-efficiency separation technology of iron complexes, organic compounds and water using membrane filtration technology after Fenton oxidation, and belongs to the technical field of sewage treatment . Background technique [0002] Fenton oxidation is an advanced oxidation technology commonly used to degrade pollutants such as trichlorethylene (TCE) and tetrachloroethylene (Perchlorethylene, PCE) in sewage. The chemical reagent used for Fenton's oxidation is known as Fenton's reagent - a solution of hydrogen peroxide and ferrous iron catalyst developed by HJHFenton in the 1890s. [0003] In the Fenton reaction, a transition metal (such as iron) catalyst is necessary to initiate the oxidation reaction. Ferrous iron is oxidized to ferric iron by hydrogen peroxide, during which hydroxyl and hydroxide ions are formed. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04
CPCC02F1/20C02F1/44C02F1/444C02F1/66C02F1/722C02F9/00C02F2301/046C02F2301/08C02F2303/14C02F2305/026
Inventor 刘建林董凯胤
Owner CITIC ENVIROTECH GUANGZHOU CO LTD
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