WO2015194739A1 - Waste water treatment method using micro-electrolysis reaction, and micro-electrolysis material thereof - Google Patents

Abstract

The present invention relates to a waste water treatment method using a micro-electrolysis reaction, and a micro-electrolysis material thereof and, more particularly, to a water water treatment method using a micro-electrolysis reaction, and a micro-electrolysis material thereof, the method forming a porous fine electrolytic material (M) in which iron, carbon and a reduced metal are sintered, wherein waste water in an acid condition is introduced into an electrolysis reactor (20) into which the fine electrolytic material (M) is injected, a micro-electrolysis reaction is induced in which iron and carbon contained in the fine electrolytic material (M) serve as electrodes in a state where external power is not supplied, and in addition, a Fenton oxidation of ferrous iron and hydrogen peroxide, produced in the micro-electrolysis reaction, is induced. As a result, the present invention maximizes generation of a strong oxidizing agent such as OH radicals, etc, thereby enhancing the decomposition efficiency of organic substances, and increasing the removal efficiency of nitrogen by reaction of a reduced metal, and on the other hand, the present invention facilitates driving and maintenance, thereby improving waste water treatment efficiency.

Description

Wastewater Treatment Method Using Microelectrolyte and Its Microelectrolytes

The present invention forms a porous microelectrolytic material sintered iron and carbon and a reducing metal, but the wastewater in an acidic condition into the electrolytic reaction tank in which the microelectrolyte is injected, it is included in the microelectrolytic material without supplying external power Iron and carbon induce a micro-electrolysis reaction in which the electrode serves as an electrode, and in addition, induces fenton oxidation of the ferric iron and hydrogen peroxide generated during the microelectrolysis reaction, resulting in OH radicals (OH Maximize the production of strong oxidants such as Radical) to improve the decomposition efficiency of organic matters, improve the efficiency of removing nitrogen by reaction of reducing metals, and facilitate the operation and maintenance. The present invention relates to a wastewater treatment method using a microelectrolytic reaction and its microelectrolytes.

Due to the development of modern technology, various wastewater treatment methods have been proposed and used in the field of water treatment. Among them, wastewater treatment method by electrochemical technology and wastewater treatment method by Fenton's Oxidation Process A schematic configuration and problems thereof will be described below.

First, referring to the wastewater treatment method by electrolysis corresponding to the conventional electrochemical technology, an oxidation / reduction reaction is caused by applying an external power source to the anode and cathode electrodes introduced into the wastewater. Contaminants are decomposed directly or indirectly by powerful oxidants such as OH radicals, which are mainly used in COD and color removal processes, and the efficiency of nitrogen removal is very low. have.

Specifically, in the case of the nitrogen component, the oxidation reaction occurs well by the OH radical generated by the oxidation / reduction reaction, but the removal efficiency is very low because only the present form of nitrogen is changed, because the reduction rate of nitrogen is very slow. Due to the reduction reaction, magnesium (Mg), manganese (Mn), zinc (Zn), chromium (Cr), iron (Fe), cadmium (Cd), tin (Sn), aluminum (Al), lead (Pb) As it occurs on the surface of the reducing metal capable of reducing nitrogen as described above, the larger the surface area of the reducing metal, the faster the rate of reduction reaction, whereas in the conventional wastewater treatment method by electrolysis, the material of the electrode to increase the removal efficiency of nitrogen components. It is because there are many difficulties in making the number of electrode plates in order to reduce the number of metals or increase the surface area of the reduced metal.

In addition, in the wastewater treatment method by electrolysis, not only the external power must be continuously supplied, but on the other hand, since the adhesion is generated and the resistance increases as the operation continues, there is a problem of low energy efficiency.

Hereinafter, looking at the wastewater treatment method by the Fenton's Oxidation Process, the fenton oxidation reaction is usually by adding the ferric iron (Fe (II)) and hydrogen peroxide (H ₂ O ₂ ) at acidic conditions of pH 3 ~ 5 In addition, the COD component and chromaticity are removed by a powerful oxidizing agent such as OH radical (OH Radical) generated by the oxidation / reduction reaction of the ferric iron (Fe (II)) and hydrogen peroxide (H ₂ O ₂ ).

However, in the case of the fenton oxidation, since the ferric iron (Fe (II)) having a catalytic function is oxidized to trivalent iron (Fe (III)) by hydrogen peroxide (H ₂ O ₂ ), some trivalent iron is produced. Even in view of the reduction of (Fe (III)), continuous supply of ferric iron (Fe (II)) and hydrogen peroxide (H ₂ O ₂ ) is required, which makes it difficult to operate and maintain. Since the production of more oxidant is required for the treatment of a large amount of waste water, there is a problem in that the process cost increases with the addition of ferric iron (Fe (II)) and hydrogen peroxide (H ₂ O ₂ ).

In addition, in the wastewater treatment method using the fenton oxidation reaction, it is not possible to expect the removal of contaminants by electrocoagulation or electrocondensation in addition to the direct oxidation by OH radicals, and thus the route for decomposing contaminants is limited. There are disadvantages that are mainly used to remove COD components and chromaticity.

The present invention solves the conventional problems as described above by using only the advantages of the existing electrochemical wastewater treatment and wastewater treatment by fenton oxidation, high energy efficiency by electrolyzing the wastewater without supplying external power, the Fenton oxidation reaction It is not necessary to supply ferric iron and hydrogen peroxide to remove contaminants, and it is easy to operate and maintain. On the other hand, it can be used for direct oxidation by OH radical and indirect oxidation by ozone, etc. It is an object of the present invention to maximize the wastewater treatment efficiency, such as not only to remove the hardly decomposable COD component and color through the route, but also to enhance the removal efficiency of nitrogen components by reaction of various reducing metals.

Waste water treatment method using the microelectrolytic reaction and the composition of the microelectrolyte according to the present invention for achieving the above object is, pH adjustment step of adjusting the waste water to acid, and porous sintered body containing iron, carbon and reducing metal Wastewater in the acidic condition is introduced into an electrolytic reactor filled with phosphorus microelectrolyte to induce a micro-electrolysis reaction in which iron and carbon included in the microelectrolyte serve as electrodes to supply wastewater without supplying external power. At the same time, it induces Fenton Oxidation reaction of ferric iron and hydrogen peroxide produced by microelectrolytes during microelectrolyte reaction to decompose contaminants by oxidizing power of maximized OH radicals and is included in microelectrolytes The microelectrolysis process of removing nitrogen by reaction of the reduced metal, and the contamination by the microelectrolyte and fenton oxidation Characterized in the "water treatment method using the micro-electrolysis reaction, coagulation of the sludge in the waste water to be decomposed and including agglutination step of neutralizing the waste water.

The present invention further comprises a fenton oxidation process for introducing a wastewater of an electrolytic reaction tank into an oxidation reaction tank to decompose untreated contaminants after the microelectrolysis process and then introducing hydrogen peroxide to promote the fenton oxidation reaction, and the aggregation In the reaction process, the agglomeration reaction tank for introducing the flocculant, the neutralization tank for the addition of slaked lime and the coagulation tank for the injection of polymer are sequentially distinguished, and the precipitation process for the precipitation of sludge and the precipitated sludge are dewatered There is an additional feature to the 'wastewater treatment method using microelectrolytic reaction', which further comprises a dehydration process to be taken out.

In addition, the present invention has another feature of the present invention in the formation of a sintered porous microelectrolyte having a main component of iron, carbon and a reducing metal so as to cause oxidation / reduction reaction due to a potential difference in wastewater under acidic conditions. The electrolytic material has an additional feature in the microelectrolytic material composed of a porous sintered body of 65 to 85% by weight of iron, 10 to 30% by weight of carbon, and 2 to 8% by weight of reduced metal.

According to the present invention having the above-described configuration, the complex reaction of micro-electrolysis and Fenton Oxidation maximizes the generation of powerful oxidants such as OH radicals, and thus the efficiency of removing pollutants by direct oxidation is improved. In addition, the contaminants are decomposed through various paths such as indirect oxidation by ozone and electroaggregation and electrocondensation, thereby improving the efficiency of removing hardly decomposable COD components and chromaticity, and on the other hand, reduction in microelectrolytes. The reaction of the metal improves the removal efficiency of the nitrogen component, such as to improve the wastewater treatment efficiency.

In addition, in order to induce the microelectrolysis and fenton oxidation reaction, it is not necessary to supply external power and supply of bivalent iron and hydrogen peroxide, and as a result, only the advantages of the conventional electrochemical wastewater treatment and wastewater treatment by fenton oxidation There is an economic effect to facilitate the operation and maintenance, which was a disadvantage, and to improve energy efficiency.

1 is a flow chart showing a wastewater treatment method using the microelectrolytic reaction of the present invention

2 is a process chart showing the wastewater treatment method using the microelectrolytic reaction of the present invention

3 is a schematic diagram showing a wastewater treatment method using the microelectrolytic reaction of the present invention.

* Description of the symbols for the main parts of the drawings *

10: pH adjusting tank 20: electrolytic reaction tank

30: oxidation reaction tank 41: coagulation reaction tank

42: neutralization tank 43: flocculation tank

50: sedimentation tank 55: dehydrator

S100: pH adjustment process S200: Microelectrolysis process

S300: Fenton oxidation process S400: Coagulation reaction process

S500: precipitation process S550: dehydration process

M: Microelectrolyte

Hereinafter, the wastewater treatment method using the microelectrolyte reaction and the constitution of the microelectrolyte according to the preferred embodiment of the present invention will be described with reference to FIGS. 1 to 3. Look at them separately.

1. pH adjustment process

pH adjustment step (S100) is a step of adjusting the acidity in order to cause a stable micro-electrolysis reaction in the subsequent microelectrolysis process (S200), the raw water is introduced into the pH adjustment tank (10) and then sulfuric acid ( H ₂ SO ₄ ) is added to adjust the acidity of the wastewater in the range of pH 2-3, preferably adjusted to maintain pH 2.5. At this time, since the pH value may be increased in the subsequent microelectrolysis process (S200), it is preferable to check this at all times to automatically control the amount of sulfuric acid injected.

2. Microelectrolysis Process

The microelectrolytic process (S200) is introduced into the wastewater adjusted to the acidic condition prior to the electrolytic reaction tank 20 filled with the microelectrolyte (M), which is a porous sintered body containing iron, carbon and reduced metal, the microelectrolyte (M) Iron and carbon contained in the electro-electrolyte (Micro-Electrolysis) reaction to act as an electrode to electrolyze the wastewater without supply of external power, and at the same time 2 generated by the microelectrolyte (M) during the microelectrolyte reaction By inducing Fenton Oxidation reaction of ferrous (Fe (II)) and hydrogen peroxide (H ₂ O ₂ ), contaminants are decomposed by the oxidizing power of OH radicals. It is a process to remove nitrogen by reaction of the reducing metal contained in M).

At this time, the microelectrolyte (M) is formed by sintering 65 to 85% by weight of iron, 10 to 30% by weight of carbon, and 2 to 8% by weight of reduced metal at a high temperature of 1300 ° C to 1800 ° C, but the contact area with the wastewater. It is preferable to form a porous structure in consideration of the above, the reduced metal is magnesium (Mg), manganese (Mn), zinc (Zn), chromium (Cr), iron (Fe), cadmium (Cd), tin (Sn) And at least one of aluminum (Al) and lead (Pb).

On the other hand, the electrolytic reaction tank 20 is preferably to supply oxygen through a fine acid pipe (散 氣管) because sufficient oxygen supply is necessary to facilitate the oxidation / reduction reaction smoothly.

The microelectrolysis process (S200) configured as described above decomposes contaminants by the strong oxidizing power of OH radicals (OH Radical) maximized by Micro-Electrolysis and Fenton Oxidation reactions as well as reducing metals. To remove the nitrogen component by the reaction of the bar, look at the configuration and function of each reaction in detail below.

2-1. Microelectrolytic reaction

In the present invention, the micro-electrolysis reaction is basically similar to electrochemical technology, but the oxidation / reduction reaction occurs by a component having a different standard reduction potential without supplying external power.

Specifically, iron (Fe) and carbon (C) included in the microelectrolyte (M) introduced for the microelectrolytic reaction serve as an anode and a cathode, respectively, without external electricity supply. Like a galvanic cell, a flow of electrons occurs, and an oxidation reaction at an anode and a reduction reaction at a cathode occur naturally due to a potential difference.

In this case, oxidation and reduction of the positive electrode may be represented by the following reaction formula, and the microelectrolytic reaction is smooth when the oxygen is sufficient under acidic conditions.

① Anode (Oxidation)

^{2Fe - 4e - → 2Fe 2+ ----------------------------} E 0 (Fe 2+ / Fe) = 0.44V

② Cathode (Reduction)

^{4H + 4e - → 4 [H} ] → 2H 2 ↑ ( ^{acidic) ------------- E 0 (H + /} H 2) = 0.00V

_{^{O 2 + 4H + + 4e -}} → 2H 2 O ( _{^{acid) ----------------- E 0 (O 2)}} = 1.23V

_{O 2 + 2H 2 O + 4e} - → 4OH - ( neutral or _{^{alkaline) ---- E 0 (O 2 /}} OH -) = 0.40V

According to the microelectrolytic reaction, strong oxidizing agents such as Cl ₂ , ClO ₂ , O ₃ , OH radicals, HClO, H ₂ O ₂ , O ₂ , H ₂ , and CO ₂ are generated during the electrolysis process. Radicals, O radicals, HClO, etc. are powerful oxidants that can easily decompose organic matter (direct oxidation).

In addition, OH radicals, O radicals, HClO, etc., which cause the direct oxidation reaction, react with the organic material as soon as they are formed to oxidize the organic material or decompose themselves to form O ₂ , Cl ₂ , ClO ₂ , H ₂ O ₂ , O _3, or the like. They turn into oxidants, which are less oxidative than radical but do not react instantaneously, and therefore remain relatively longer in water to remove contaminants (indirect oxidation).

Therefore, most of the contaminants contained in the waste water have a sufficient removal of the COD component by indirect oxidation by oxidant together with direct oxidation by radical.

2-2. Fenton Oxidation

Micro-Electrolysis reaction in the present invention, unlike the conventional case of the phenton oxidation, the ferric oxide (Fe (II)) and hydrogen peroxide (H ₂ O ₂ ) is supplied from the outside of the microelectrolyte (M) of electricity It is characterized in that it is an oxidation / reduction reaction of ferric iron (Fe (II)) and hydrogen peroxide (H ₂ O ₂ ) produced by decomposition.

Specifically, according to the microelectrolytic reaction according to the present invention, the bivalent iron (Fe ²⁺ ) is produced by the anodic reaction occurring in the iron (Fe) component of the microelectrolyte (M), and the carbon ( Hydrogen peroxide (H ₂ O ₂ ) is produced by the cathodic reaction occurring in the C) component, and the ferric iron (Fe ²⁺ ) and hydrogen peroxide (H ₂ O ₂ ) thus produced cause an oxidation / reduction reaction and the oxidation / reduction Fenton oxidation in which organic matter is decomposed by the strong oxidizing power of OH radicals generated by the reaction proceeds.

At this time, the decomposition reaction of the organic material according to the anodic reaction and the cathodic reaction and fenton oxidation can be expressed as shown in the following scheme, Figure 3 shows a schematic diagram.

① anode reaction

2Fe ^- 4e - → 2Fe ²⁺

_{2H 2 O → O 2 + 4H} + + 4e -

② Cathode Reaction

_{^{O 2 + 2H + + 2e -}} → H 2 O 2

Fe ³⁺ + e ^- → Fe ²⁺

③ Decomposition reaction of organic matter by fenton oxidation

Fe ²⁺ + H ₂ O ₂ + H ⁺ → Fe ³⁺ + OH radical + H ₂ O

Organics + OH radical → Intermediates + CO ₂ + H ₂ O

According to the Fenton oxidation reaction in the present invention, unlike the conventional Fenton oxidation, it is not necessary to input the ferric iron (Fe (II)) and hydrogen peroxide (H ₂ O ₂ ) from the outside, the fine electrolyte material (M) Since ferric iron (Fe (II)) and hydrogen peroxide (H ₂ O ₂ ) are produced by itself, the operation and maintenance are easy.

In addition, in the present invention, in the treatment of wastewater containing a large amount of hardly decomposable COD components, OH radicals are generated in the phenton oxidation reaction in addition to the microelectrolytic reaction, and on the other hand, OH radicals are continuously generated during the electrolysis of the microelectrolytes. Finally, it maximizes the production of OH radicals and is effective in removing hardly decomposable COD.

2-3. Removal reaction of nitrogen by reducing metal

In the nitrogen removal reaction of the present invention, the COD component is not only contained in a large amount of the reducing metal and carbon component in the microelectrolyte (M) participating in the reaction, but also has a large surface area in contact with the wastewater as a porous structure. And of course, the removal efficiency of nitrogen components is very high as well as color removal.

Specifically, the reducing metal included in the microelectrolytic material of the present invention is excellent in reducing power magnesium (Mg), manganese (Mn), zinc (Zn), chromium (Cr), iron (Fe), cadmium (Cd), tin ( Sn), aluminum (Al), and lead (Pb) at least one or more of these, by reducing metals such as nitrous nitrogen to nitrous nitrogen or ammonia nitrogen to reduce some directly to nitrogen gas and some It can be removed by chemical reaction with hypochlorous acid generated by decomposition, and organic nitrogen and ammonia nitrogen can be directly oxidized by hypochlorous acid to remove all kinds of nitrogen.

On the other hand, it is determined by the reaction temperature and pH conditions and the type of the reducing metal after which the nitrate nitrogen is reduced by the reducing metal, which is usually NO ₂ , N ₂ 0, NO , N ₂ , NH ₃ and the like. The chemical reaction in this case can be expressed as follows.

_{^{① NO 3 - + 2e - +}} H 2 O → NO 2 - + 2OH ----------- anode reaction

_{^{② 2NO 2 - + 6e - +}} 4H 2 O → N 2 + 8OH - ---------- anode reaction

_{^{③ 2OH - → H 2 O +}} 1 / 2O 2 + 2e - --------------- anodisation

_{^{④ 6OH - → 3H 2 O +}} 3 / 2O 2 + 6e - -------------- anodisation

As described above, the nitrous oxide (NO ₂ ⁻ ) is reduced to nitrogen gas (N ₂ ) by direct electrolysis as described above, but some are reduced to ammonia nitrogen. The chemical reaction formula is as follows.

_{^{⑤ NO 2 - + 6e - +}} 5H 2 O → NH 3 + 7OH - ---------- anode reaction

The ammonia thus formed can be removed by a method known as breaking point chlorine injection. Although only chlorine sikilsu produce a salt (NaCl) in the electrolysis bath by giving to injection to the reactor, typically the waste water has a significant amount of chlorine ion (Cl ^-) you need not be additionally added in many cases salt, because it is this. The reaction scheme at this time is as follows.

_{^{⑥ Cl - + H 2 O →}} ClO - + 2H + + 2e

_{^{⑦ 2NH 4 + + 3ClO - →}} N 2 + 3Cl - + 2H + + 3H 2 O

Therefore, in the case of the conventional wastewater treatment, the oxidized nitrogen is changed only in the present form, but the removal efficiency is very low, whereas in the present invention, a large amount of porous microelectrolyte (M) included in the present invention maximizes the contact area with the wastewater. It is possible to quickly reduce and remove all kinds of nitrogen by various reducing metals.

3. Fenton Oxidation Process

Fenton oxidation process (S300), in order to decompose the untreated contaminants in the microelectrolysis process (S200) flows the wastewater of the electrolytic reaction tank 20 into the oxidation reaction tank 30, and then hydrogen peroxide (H ₂ O ₂ ) from the outside As an additional process that promotes the micro-electrolysis reaction, the ferric iron (Fe (II)) is introduced into the electrolytic reaction tank in a sufficient amount of hydrogen peroxide (H ₂ O ₂ ). By a certain amount, it has a strong COD removal efficiency.

4. Coagulation reaction process

Agglomeration reaction step (S400) is a process of agglomeration of sludge in the wastewater from which the pollutants are decomposed by the microelectrolytic reaction and the fenton oxidation reaction and neutralizing the wastewater, and more specifically, as shown in FIG. It is preferable that the coagulation reaction tank 41 and the neutralization tank 42 for introducing the slaked lime (CaOH ₂ ) and the coagulation tank 43 for injecting the polymer are sequentially distinguished.

At this time, the flocculant introduced into the coagulation reaction tank 41 uses a known PAC inorganic flocculant, and the slaked lime (CaOH ₂ ) injected into the neutralization tank 42 is wastewater so that the inorganic coagulant previously introduced may cause an optimal flocculation reaction. Increasing the pH value of the neutralization, the polymer (Polymer) is added to the flocculation tank (43) to increase the size of the solid produced by the reaction of the inorganic flocculant so that the natural sedimentation in the settling tank 50 to be described later smoothly Play a role.

5. Precipitation and Dewatering Process

Precipitation step (S500) is a process of separating the solids by sedimentation of the solid sludge produced in the flocculation reaction step (S400) in the settling tank 50, dehydration step (S550) is the sludge separated solids in the settling tank (50) As a step for removing the water by introducing into the dehydrator 55 to remove the water, the present invention is not limited to the kind of the dehydrator 55.

Hereinafter, look at the configuration of the microelectrolyte (M) used in the wastewater treatment method using a microelectrolytic reaction according to a preferred embodiment of the present invention.

The microelectrolyte (M) according to the present invention is a porous structure sintered with iron (Fe), carbon (C) and a reducing metal as a main component so that oxidation / reduction reaction due to a potential difference occurs in wastewater under acidic conditions. Sinter 65 to 85% by weight of iron, 10 to 30% by weight of carbon, and 2 to 8% by weight of reduced metal at a high temperature of 1300 ° C to 1800 ° C, but have a porous structure to maximize the contact area during inflow of wastewater. do.

At this time, the reduced metal contained in the microelectrolyte (M) is magnesium (Mg), manganese (Mn), zinc (Zn), chromium (Cr), iron (Fe), cadmium (Cd), tin (Sn), At least one or more of aluminum (Al) and lead (Pb), and the reducing metal serves as a catalyst for rapidly reducing and removing nitrogen in the microelectrolysis process (S200).

Hereinafter, the wastewater treatment method using the microelectrolytic reaction and the action of the microelectrolyte according to the preferred embodiment of the present invention.

Initially, sulfuric acid (H ₂ SO ₄ ) is added to the wastewater raw water introduced into the pH adjusting tank 10 in the pH adjusting process (S100) to adjust the acidity of the wastewater to a pH of 2 to 3, preferably to pH 2.5. In addition, the wastewater adjusted to the acidic condition is introduced into the electrolytic reaction tank 20 filled with the microelectrolyte (M) to perform the microelectrolysis process (S200).

Specifically, in the acidic wastewater contacting the microelectrolyte (M), iron and carbon included in the microelectrolyte (M) act as electrodes without a supply of external power, and thus, micro-electrolysis reactions. At the same time, Fenton Oxidation of the ferric iron and hydrogen peroxide produced during the microelectrolysis reaction is induced, resulting in effective decomposition of organic matter by maximizing the production of powerful oxidants such as OH radicals. On the other hand, nitrogen is rapidly reduced and removed from the surface of the reducing metal contained in the microelectrolyte (M).

At this time, by continuously measuring the acidity of the electrolytic reaction tank 20 to increase the pH value by adding sulfuric acid to maintain the optimum microelectrolytic reaction conditions.

And, the contaminants remaining untreated in the microelectrolysis process (S200) flow into the oxidation reaction tank 30 into which hydrogen peroxide is introduced, and additionally perform the Fenton oxidation process (S300), so that more perfect removal of contaminants is possible. Do.

Subsequently, the wastewater from which the pollutants are decomposed is sequentially introduced into the coagulation reaction tank 41 into which the inorganic coagulant is introduced, the neutralization tank 42 into which the slaked lime is introduced, and the coagulation tank 43 into which the polymer is introduced (S400). After passing through, the rectified water solid-liquid separated in the settling tank 50 of the precipitation step (S500) is discharged and the sludge is removed through the dehydrator 55 of the dehydration step (S550) and then taken out to the outside.

Therefore, according to the present invention, while having both the advantages of the conventional electrochemical wastewater treatment and wastewater treatment by fenton oxidation, the disadvantages of the prior art are eliminated to eliminate the need for supply of external power, divalent iron and hydrogen peroxide. On the other hand, it maximizes the production of OH radicals, which are powerful oxidants, and removes contaminants through various routes, and greatly improves wastewater treatment efficiency by removing nitrogen components by reaction of reducing metals. Can be.

Claims (3)

1. By adjusting sulfuric acid to the waste water by adjusting the acidity of the waste water to pH 2 to 3, pH adjustment step (S100) to allow a stable micro-electrolysis (Micro-Electrolysis) reaction in the subsequent process;

   Electrolytic reaction tank (20) filled with 65 to 85% by weight of iron, 10 to 30% by weight of carbon, and 2 to 8% by weight of reduced metal at a high temperature of 1300 ° C to 1800 ° C. By supplying oxygen and supplying the wastewater adjusted to pH 2-3, the iron and carbon contained in the microelectrolyte (M) induce a micro-electrolysis reaction in which the electrode serves as an electrode to supply external power. While electrolyzing wastewater without induction, it induces Fenton Oxidation reaction of ferric iron and hydrogen peroxide produced by microelectrolytes (M) during microelectrolyte reaction to decompose pollutants by oxidizing power of OH radicals. A microelectrolysis process (S200) of removing nitrogen by reaction of a reducing metal contained in the microelectrolyte (M);

   An agglomeration reaction step (S400) of aggregating sludge in the wastewater from which the pollutants are decomposed by the microelectrolytic reaction and the fenton oxidation reaction and neutralizing the wastewater;

   A precipitation step (S500) of precipitating sludge after the flocculation reaction step (S400);

   Wastewater treatment method using a microelectrolytic reaction, characterized in that it comprises a dehydration step (S550) to dehydrate the sludge to be carried out.
2. The method of claim 1,

   In order to decompose the untreated contaminants after the microelectrolysis process (S200), a pentone oxidation process (S300) for introducing a wastewater of the electrolytic reaction tank 20 into the oxidation reaction tank 30 and then introducing hydrogen peroxide to promote the fenton oxidation reaction (S300). Wastewater treatment method using a microelectrolytic reaction further comprising.
3. Sintered porous microelectrolyte is formed by using iron, carbon, and reducing metal as a main component to cause oxidation / reduction reaction due to potential difference in wastewater under acidic conditions, and the microelectrolyte is 65 to 85 wt% of iron and carbon 10 The fine electrolytic material of the wastewater treatment method using a microelectrolytic reaction, characterized in that the sintered to 30% by weight and 2 to 8% by weight of reduced metal at a high temperature of 1300 ℃ to 1800 ℃ to have a porous structure.

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