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Full valence state application integrated wastewater treatment method integrating catalysis, oxidation, reduction and coagulation

A waste water treatment and waste water technology, which is applied in the direction of oxidized water/sewage treatment, water/sewage treatment, chemical instruments and methods, etc., can solve the problems of narrow application range of pH, easy hardening of fillers, etc., and achieve low operating costs and reduced operating costs , the effect of reducing sludge production

Pending Publication Date: 2019-03-15
NANJING INNOVATION CENT FOR ENVIRONMENTAL PROTECTION IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Iron-carbon micro-electrolysis uses a primary battery system formed of iron-carbon to oxidize and remove pollutants in wastewater, but its filler is easy to harden and has a narrow pH range, while iron shavings are waste materials produced by machine tools such as cast steel. It shows that iron shavings are a good substitute for iron-carbon

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The iron full-valence application integrated wastewater treatment method of this embodiment that integrates catalysis, oxidation, reduction and coagulation is carried out according to the following steps:

[0024] (1) Add magnesium sulfate and magnesium chloride to the wastewater to be treated (COD8000mg / L, ammonia nitrogen 260mg / L) to make the total salt content in the wastewater to be treated 0.5wt%, and then add iron shavings to the wastewater to be treated, which is in the wastewater Ferrous ions are generated through the action of galvanic cells, and iron is used as a reducing agent in this process to obtain wastewater containing ferrous ions;

[0025] (2) Add an oxidant (pass ozone to adjust the pH value of the ferrous ion-containing wastewater to 8) to the ferrous ion-containing wastewater treated in step (1) to perform catalytic oxidation to reduce the COD value and ammonia nitrogen in the wastewater The concentration is reduced by oxidation. At this time, ferrous io...

Embodiment 2

[0030] The iron full-valence application integrated wastewater treatment method of this embodiment that integrates catalysis, oxidation, reduction and coagulation is carried out according to the following steps:

[0031] (1) Add iron shavings to the waste water to be treated (COD60000mg / L, ammonia nitrogen 500mg / L, salt content 8wt%). The iron shavings generate ferrous ions in the wastewater through galvanic cell action. In this process, iron is used as a reducing agent to obtain Wastewater with ferrous ions;

[0032] (2) Add an oxidizer (add hydrogen peroxide to adjust the pH value of the ferrous ion-containing wastewater to 5) to the ferrous ion-containing wastewater treated in step (1) to perform catalytic oxidation to reduce the COD value and ammonia nitrogen concentration in the wastewater The oxidation is reduced. At this time, the ferrous ions in the oxidized wastewater are converted into iron ions. In this process, iron acts as a catalyst to obtain the oxidized wastewater; ...

Embodiment 3

[0038] The iron full-valence application integrated wastewater treatment method of this embodiment that integrates catalysis, oxidation, reduction and coagulation is carried out according to the following steps:

[0039] (1) Add copper sulfate and copper chloride to wastewater to be treated (COD20000mg / L, ammonia nitrogen 480mg / L, salt content 8wt%) to make the total salt content in the wastewater to be treated 10wt%, and then add iron to the wastewater to be treated Wood shavings or other ferrous metal wastes, the added iron shavings or other ferrous metal wastes are added to the waste water to generate ferrous ions through the action of galvanic cells, and iron is used as a reducing agent in this process to obtain ferrous ions-containing waste water;

[0040] (2) Add an oxidizer (add hydrogen peroxide to adjust the pH value of the ferrous ion-containing wastewater to 3) to the ferrous ion-containing wastewater treated in step (1) to perform catalytic oxidation to reduce the COD va...

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Abstract

The invention discloses a full valence state application integrated wastewater treatment method integrating catalysis, oxidation, reduction and coagulation and belongs to the field of wastewater treatment. The invention aims at providing the full valence state application integrated wastewater treatment method integrating catalysis, oxidation, reduction and coagulation, which has the advantages oflow cost, simple operation and good treatment effect. The full valence state application integrated wastewater treatment method integrating catalysis, oxidation, reduction and coagulation, disclosedby the invention, comprises the following steps: adding iron scraps or other ferrous metal scraps into to-be-treated wastewater and adding an oxidant for catalytic oxidation; adding the iron scraps orother ferrous metal scraps again, and adjusting the pH value for flocculent precipitation. The full valence state application integrated wastewater treatment method integrating catalysis, oxidation,reduction and coagulation, disclosed by the invention, can control the addition of raw materials according to the demands of wastewater treatment, and adjust the yield of (ferrous) iron ions, so thatthe sludge yield is reduced to the greatest extent while the demands of treatment are met.

Description

Technical field [0001] The invention belongs to the field of wastewater treatment, and particularly relates to an integrated wastewater treatment method for iron full-valence applications that integrates catalysis, oxidation, reduction and coagulation. Background technique [0002] Conventional wastewater treatment technology is mainly divided into physical treatment technology, chemical treatment technology, and biological treatment technology. [0003] Relevant research and engineering practice have shown that physical treatment technologies such as air flotation, filtration, and coagulation can partially remove COD and other pollutants in wastewater, but the removal efficiency is not high; chemical treatment technologies such as ozone, Fenton, and electrocatalysis have an impact on wastewater The removal effect of COD and other pollutants is good, but the dosage of chemicals is large, the operating cost is high, and the sludge output of Fenton treatment technology is large; biol...

Claims

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Application Information

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IPC IPC(8): C02F9/04
CPCC02F1/5236C02F1/705C02F1/722C02F1/725C02F1/78C02F9/00
Inventor 姜笔存曲艳南宋均轲于伟华陈达王强
Owner NANJING INNOVATION CENT FOR ENVIRONMENTAL PROTECTION IND
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