KR101102277B1 - Solubilization and extinguishing system of organic sludge by two-stage electrolytic method using electrolytic device equipped with electrode of multilayer matrix type - Google Patents

Abstract

The present invention provides a system for solubilizing and extinguishing organic sludge by a two-stage electrolytic method using an electrolytic apparatus having electrodes in a matrix structure in which organic sludge generated during biological treatment of sewage and wastewater is provided.
The present invention provides a bioreactor 1 for biologically treating sewage and wastewater, a sedimentation tank 2 for separating solids and liquids by introducing a mixed mixture of suspended solids after the bioreaction, and distilling (discharging) the treated water; 2) the primary electrolyzer 3 for introducing the return sludge separated from the treated water in 2) and concentrating by the electrolytic flotation; and the secondary electrolyzer 4 for introducing and solubilizing the concentrated sludge of the primary electrolyzer and electrolytic solubilized sludge It consists of a digester (5) for inflow and digestion, and a dehydrator (5) for dehydrating waste sludge discharged from the digester, wherein the primary electrolyzer (3) has a structure in which unit quantities and cathodes of plates are alternately arranged. A second step using an electrolytic device having an electrode having a multilayer matrix structure in which an electrode 3-1 having an electrode is provided, and the electrode 4-1 having a multilayer matrix structure is installed in the secondary electrolytic bath 4. It is made electrolytically.
The present invention provides a two-stage electrolysis method, namely, 1, while improving the problem of adversely affecting the bioreactor by excessive electrolysis of return water in a device composed of a single-stage electrolytic solubilization tank equipped with a plate electrode of the prior art. By adopting the two-stage electrolytic method of sludge concentration and electrolytic solubilization of secondary electrolyzer, it shows about twice as much energy reduction as the conventional electrolytic solubilizer. Sludge solubilization, that is, low molecular weight organic sludge, can be digested faster and more efficiently than existing extinguishing methods, and the improved effect of reducing the moisture content of the dehydrated cake in the dehydration process can be achieved. have.

Description

System for Anaerobic digestion and Reducing quantity of Organic sludge by Two step Electrolysis with Matrix type electrode} using a two-stage electrolytic method using an electrolytic device having an electrode having a multi-layer matrix structure

The present invention relates to a solubilization and extinguishing system of organic sludge by an energy-low consumption two-stage electrolysis method in which organic sludge generated by biological treatment of sewage and wastewater is solubilized and digested by a two-step electrolysis method.

Due to the urbanization and industrialization caused by economic growth, various problems related to the destruction of the natural environment and environmental pollution have occurred due to the increase of various kinds of living sewage and industrial wastewater. The demand for environmental infrastructure such as

As a method for treating sewage and wastewater, such as domestic sewage and various industrial wastewaters, biological treatment methods are most commonly known to date, and since they have proved to be economical, biological treatment methods have been introduced in most sewage and wastewater treatment facilities. Operate. In the biological treatment method, contaminants are decomposed and removed by metabolism of microorganisms through the mineralization and growth of microorganisms, and inevitably, excess microorganisms, that is, excess sludge to be discharged out of the system are inevitably generated. The generation of excess sludge is another problem that causes the environmental problem.

In the past, the excess sludge produced by the biological treatment method has been disposed of by reducing or reducing the volume by dehydration and then incinerated or landfilled sludge on the cake, or by dumping it in the ocean. It has been banned, and since February 2011, the discharge of oceans has been banned in accordance with the entry into force of the London Convention '96.

In particular, the government announced the Comprehensive Measures for Sewage Sludge Management in May 2008. As of July 2010, 47 sludge final treatment facilities were completed and 55 additional sites are under construction. Even if all are completed, there is not enough capacity to process the entire volume of production, the construction and operation costs of the final processing facility are expensive, and CO ₂ generation is also a problem in operation. to be.

As a prior art related to the electrolytic treatment of sludge generated after biological treatment of sewage and waste water, for example, Korean Patent Publication No. 10-0457957 discloses a method for reducing organic sludge with an electrolysis device. In Korea Patent Publication No. 10-0810598, the electrolytic solubilization tank is used as the first stage, and the amount of electrolytic sludge flowing into the electrolytic solubilization tank is controlled by using an automatic valve to prevent the electrolyzed reflux water from affecting the existing bioreactor. Disclosed is an organic sludge reduction apparatus including an electrolysis tank by adjusting the amount of applied current according to the concentration of microorganisms in the reactor, and these prior art methods, such as electrolysis, ozone, ultrasonic wave, pyrolysis, alkaline water, etc., for sludge reduction. The sludge is solubilized and re-fed by the microorganisms returned to the biological reaction tank to And a method that increases the conversion rate of water employing the same principles in the treatment principles. In particular, in the case of the sludge reduction method using electrolysis, the prior art does not show a particularly improved effect on the electrolytic method, facility cost and operating cost.

In addition, as a prior art related to organic sludge digestion technology by recycling organic sludge, for example, Korean Patent Publication No. 10-0851898 discloses aerobic digestion efficiency by mixing a certain amount of waste cooking oil as a carbon source to organic waste such as organic sludge. The present invention discloses an improved dry anaerobic digestion method, and Korean Patent Publication No. 10-0599554 discloses a method and apparatus for reducing activated sludge using a high temperature aerobic digestion tank, a medium temperature anaerobic digestion tank, and an electrolysis tank to reduce activated sludge. Korean Patent Publication No. 10-0967842 discloses a method for producing methane gas from organic sludge by continuously introducing organic sludge under pressure under a condition of adjusting it to be more than saturated steam pressure within a certain reaction temperature range. However, these prior arts are the digestive reaction itself It is a technique different from the technique of digesting solubilized sludge produced by the electrode structure and the two-stage electrolysis method, which is particularly effective for solubilization, as the present invention.

The present invention is to reduce the sludge and reduce the sludge at low energy by electrolytic solubilization and digestion of the sludge produced by the electrolytic apparatus and the improvement of the electrolytic method of the sludge generated after the biological treatment of the sewage and waste water to distinguish from the prior art It was confirmed that the amount of generated was also significantly reduced, and completed the present invention.

An object of the present invention is to provide solubilization of organic sludge of low energy consumption and digestion system for solubilizing organic sludge generated by biological treatment of sewage and wastewater by two-stage electrolysis. Specifically, the electrode having a multi-layer matrix structure in which solubilization of the organic sludge is more efficiently provided is provided. By using a two-stage electrolytic system, electrolytic solubilization of sludge generated after biological treatment of sewage and wastewater, digestion of solubilized sludge while reducing the amount of surplus sludge is performed. It is an object of the present invention to provide a solubilization and extinguishing system of organic sludge by a two-stage electrolysis method using an electrolytic device having an electrode having a matrix structure that fundamentally solves the factors that adversely affect the operation.

The main means of the solubilization and extinguishing system of organic sludge by the two-stage electrolytic method according to the present invention is composed of a two-stage electrolytic method through the sludge concentration step and the sludge solubilization step consisting of the primary and secondary electrolyzer by the reflux water It can reduce the amount of surplus sludge by increasing the solubilization efficiency of the sludge with low energy without adversely affecting the bioreactor, and at the same time promote the recycling of the organic sludge by digesting the solubilized sludge and also reduce the occurrence of dehydration cake. It is to be done.

Another feature of the present invention is that the anode and the cathode, which are particularly effective in solubilizing the sludge in the secondary electrolyzer, which constitute the solubilization and extinguishing system of the organic sludge of the two-stage electrolytic method, are alternately crosswise in the longitudinal direction. It is characterized in that the organic sludge is solubilized by installing electrodes arranged in a matrix structure to form a multilayer while being arranged.

In general, the organic sludge is solubilized when the organic sludge is delivered by the action of hypochlorous acid generated by electrolysis, cell membrane damage caused by the potential difference, etc. Sludge solubilization efficiency is very low because it is made only in the lower part of the concentrated concentrated sludge suspended by the upper part. To solve this problem, the concentration of the oxidizing substance produced by the peroxidation of the countercurrent to the bioreactor is There is a problem that increases the adverse effect on the biological reaction of the bioreactor, and the sludge reduction relative to the energy supply, there is a problem of excessive operation cost, and the cost for sludge treatment (disposal) due to the increase of the excess sludge generation There are many problems.

As a specific solution of the solubilization and extinguishing system (A) of organic sludge by the two-stage electrolytic method according to the present invention, a bioreactor 1 for biologically treating sewage and wastewater and a mixture of suspended solids after bioreaction A settling tank (2) which flows in, separates solids and liquids, and discharges (discharges) the treated water; a primary electrolyzer (3) which introduces sludge separated from the treated water in the settling tank (2) and concentrates it by electrolysis; The secondary electrolyzer (4) which inflows and electrolyzes only the concentrated sludge of the primary electrolyzer, and the digester (5) which produces digestion gas by extinguishing the solubilized sludge conveyed from the secondary electrolyzer, and dehydrating the waste sludge discharged from the digester It consists of a dehydrator 6.

The bioreactor (1) according to the present invention is composed of a bioreactor capable of biologically treating the sewage and wastewater of the conventionally known prior art, A2O, SBR bioreactor to perform the bioreaction of anaerobic, anaerobic and aerobic conditions And the like, but is not particularly limited.

In addition, the precipitation tank 2 may also be a separation tank that can obtain biological waste sludge and treated water by solid-liquid separation of microorganisms from suspended solids mixed water flowing from the bioreactor 1, for example, conventionally known in the art. It may be composed of an immersion membrane or a sedimentation tank and the like.

In the solubilization and dewatering system of organic sludge by the two-stage electrolysis method according to the present invention, the first stage electrolysis is the sludge separated from the treated water in the settling tank 2 into the primary electrolyzer 3 to concentrate the sludge by electrolysis. As a concentration step, the primary electrolytic bath 3 is composed of an electrolytic bath having the function of an electrolytic concentration bath, and in the primary electrolytic bath, electrodes in which a plate positive and negative electrodes are alternately arranged (3-1) is installed. In addition, the primary electrolytic cell using the electrode 3-1 in which the plate-shaped unit anode and the unit cathode are alternately arranged is preferable as long as it is an electrolytic cell generally used in the technique for electrolytic treatment of sewage and wastewater, and is particularly limited. It is not.

And the second stage electrolysis according to the present invention is a sludge solubilization step to solubilize the concentrated sludge introduced from the primary electrolyzer (3) in the secondary electrolyzer (4), the secondary electrolyzer (4) is a function of the electrolytic solubilization tank It consists of an electrolytic cell having, the primary electrolyzer 3 and the secondary electrolyzer 4 are all composed of an open or closed electrolytic cell,

In the secondary electrolytic bath 4, electrodes 4-1 arranged in a matrix structure in which unit anodes and cathodes are alternately arranged in the longitudinal and horizontal directions to form multilayers (hereinafter, In the secondary electrolyzer (4), due to the accumulation of charges of microorganisms due to the electrode plate structure in which the concentrated sludge is introduced in a matrix, Since the microbial cell membranes are destroyed by alternating fatigue destruction of positive and negative charges, solubilization is more efficient than the electrolytic method of the conventional single plate electrode.

Digestion tank (5) in the solubilization and digestion system of the organic sludge by the two-stage electrolytic method according to the present invention as a conventional digestion tank to produce a digestion gas by anaerobic digestion of the solubilized sludge flowing from the secondary electrolyzer (4). Digestion gas contains mainly methane gas.

Digestion according to the present invention is similar to the conventional digestion of organic sludge, the polymer material contained in the organic sludge is decomposed into low molecules by the microbial action, and finally, by acid fermentation, methane fermentation, and the like methane, ammonia, carbon dioxide, hydrogen sulfide, etc. In the production of this containing digested gas, such a digestion reaction can be carried out more efficiently by shortening the time to change the polymer material into a low molecular weight material, so that the two-stage electrolytic method of the present invention is particularly effective in solubilizing organic sludge. Digestion can be made more quickly and efficiently than conventional technology by solubilizing the sludge by the secondary electrolyzer equipped with the electrode plate structure arranged in a matrix. There is a characteristic.

The dehydrator 6 dehydrates the waste sludge discharged from the digester and discharges it onto the cake. In the process of dehydration, it is preferable to dehydrate by adding a polymer flocculant and an inorganic flocculant as a dehydration aid to increase the dehydration efficiency. The filtrate is circulated back to the bioreactor and the dehydrating cake from the dehydrator consists of treatment by conventional treatment methods such as incineration, drying, carbonization, solidification or maturation.

The dehydrator according to the present invention uses a centrifugal force to remove the water in the sludge (Screw Press) or the sludge is placed between the belt and the belt to compress the sludge between the belt in the process of passing the belt (Roller) the belt to the moisture It is not particularly limited as a dehydrator which can be easily selected by those skilled in the art to which the present invention pertains.

The solubilization and dewatering system of organic sludge by a two-stage electrolytic method using an electrolytic device having a multi-layer matrix structure according to the present invention is a one-stage electrolytic method in which a plate electrode of the prior art is installed. In the device composed of electrolytic solubilization tank, the two-stage electrolysis method, that is, the sludge concentration by the electrolytic injury of the primary electrolyzer and the second stage electrolytic solubilization of the secondary electrolyser By adopting the method, it shows the energy reduction effect of about 2 times or more than the device composed of the single electrolytic solubilization tank of the prior art, and efficiently digests the organic sludge by extinguishing and dehydrating the solubilized sludge by the two-stage electrolytic method. At the same time, the moisture content of the dehydrated cake is also significantly reduced.

1 is a general process diagram schematically showing an embodiment according to the solubilization and digestion system of the organic sludge by the two-step electrolysis method of the present invention.
2 and 3 are perspective views schematically showing the primary electrolytic bath and the secondary electrolytic bath and the electrode structure provided in each of the solubilization and digestion system of the organic sludge by the two-stage electrolytic method of the present invention.
Figure 4 (a) and (b) is an assembly view of the electrode structure (c-1) and the electrode structure (c-2) for producing an electrode of a multi-layer matrix (Matrix) structure of the present invention.
5 and 6 are structural views showing electrodes of a multilayer matrix structure in which a plurality of electrode structures (c-1) and electrode structures (c-2) of the present invention are assembled.
7 shows a mechanism by which charge is accumulated in microbial cell membranes.
FIG. 8 is a comparison diagram showing a charge accumulation mechanism of a microbial cell membrane during electrolysis by a single flat plate electrode of the prior art and an electrode of a multilayer matrix structure of the present invention. FIG.
9 is a view showing a microbial cell membrane destruction process during electrolysis by a single plate electrode of the prior art.
10 is a view showing a microbial cell membrane destruction process during electrolysis by the electrode of the matrix structure of the present invention.
Figure 11 is a comparison showing the energy consumption of the prior art one-step electrolysis method and the two-step electrolysis method according to the present invention.

Hereinafter, with reference to the accompanying drawings will be described in more detail with respect to the solubilization and extinguishing system of organic sludge by a two-step electrolytic method using an electrolytic device having an electrode of a multi-layer matrix structure according to the present invention.

1 is a general process diagram schematically showing an embodiment according to the solubilization and digestion system of the organic sludge by the two-step electrolysis method of the present invention, referring to FIG.

The present invention biologically treated by conventional techniques such as A2O, SBR method to infiltrate sewage and wastewater, such as domestic sewage and various industrial wastewater into the biological reaction tank (1) to perform bioreaction under anaerobic, anaerobic and aerobic conditions, (2), the microorganisms are separated from the suspended solids mixture by solid and liquid separation in the settling tank (2), the treated water is discharged from the settling tank (2), and the separated sludge is part of the bioreactor (1). At the same time as the circulation to the primary electrolytic bath (1).

In the primary electrolyzer 3, the sludge flowing from the lower part is concentrated by the electrolytic part to transfer the concentrated sludge suspended in the upper part to the lower part of the secondary electrolyzer 4, and at the same time, the return water of the primary electrolyzer 3 Circulating back to the bioreactor 1.

And the concentrated sludge introduced into the lower part of the secondary electrolyzer 4 is solubilized by the electrode 4-1 of the matrix structure (Matrix) according to the present invention, solubilized sludge is transferred to the digester (5) to extinguish By producing the digestive gas by operation, the waste sludge discharged from the digester (5) is transferred to the dehydrator (6), dehydrated and then separated and discharged to the dehydration cake, the dewatering filtrate is composed of circulating back to the bioreactor (1) .

Digestion tank (5) according to the present invention is a digestion gas containing a high molecular material in the organic sludge is decomposed into low molecules by the microbial action, and finally containing methane, ammonia, carbon dioxide, hydrogen sulfide and the like by acid fermentation, methane fermentation, etc. Digestion tank having the function of a conventional digester to produce is possible, for example, may be selected from the prior art reactors, such as a batch reactor for the digestion reaction or a continuous batch reactor connected to the batch reaction tank.

Figure 1 shows an embodiment in which the concentrated sludge flows from the primary electrolyzer into the lower portion of the secondary electrolyzer 4, but the concentrated sludge can also flow into the upper portion of the secondary electrolyzer 4, and solubilization tank When the secondary electrolyzer 4 is closed, sludge inflow and outflow of the solubilization tank are configured in a horizontal flow manner.

FIG. 2 is a perspective view schematically showing the structure of the primary electrolyzer 3 and the single plate electrode 3-1 of the solubilization and digestion system of the organic sludge by the two-step electrolysis method according to the present invention. See,

The single plate electrode 3-1 installed in the primary electrolytic bath 3 has a structure in which unit positive (+) poles and unit negative (-) poles of a plate type are alternately arranged. The first electrolytic bath 3 according to the present invention concentrates the incoming sludge into the electrolytic flotation, and the primary electrolyzer is a single plate electrode (3-) in order to maximize the electrolytic injury effect. In this process, about 60% of the return water is returned to the bioreactor (1) with little effect of electrolysis, and only the concentrated sludge concentrated in the primary electrolyzer (3) is secondary to the secondary electrolyzer ( 4) so that the sludge solubilization is effected through the destruction of the cell membrane by the electrolysis in the secondary electrolyzer (4).

FIG. 3 is a perspective view schematically illustrating a secondary electrolyzer and electrode according to the present invention in a two-stage electrolytic sludge solubilization and extinguishing system according to a two-stage electrolytic method. Referring to FIG.

In the secondary electrolytic bath 4 according to the present invention, the unit positive electrode plate 4-2 and the unit negative electrode plate 4-3 are alternately arranged in the longitudinal and horizontal directions by introducing only the concentrated sludge introduced from the upper portion of the primary electrolytic bath 3. The destruction of the microbial cell membrane by the charge accumulation of the microorganism by the electrode 4-1 of the matrix structure that forms the multilayer is solubilized by the alternating fatigue destruction of the positive and negative charges. Higher solubilization is achieved than a plate electrode.

4 (a) and 4 (b) are assembled views of an electrode structure (c-1) and an electrode structure (c-2) for fabricating an electrode having a multilayer matrix structure according to the present invention. And (b),

The electrode structure (c-1) and the electrode structure (c-2) are intermediate parts for the production of the electrode 4-1 of the matrix structure of the present invention, the electrode structure (c-1) is positive ( A plurality of unit positive electrode plates 4-2 in the form of a rectangular plate on the pole sharing terminal (a) are connected to the anode structure (a-1) and the negative (-) pole sharing terminal (b) which are sequentially coupled up and down at a predetermined interval. A plurality of rectangular negative electrode plates (4-3) in the form of a rectangular plate is assembled and fabricated in such a manner that the cathode structure (b-1), which is coupled up and down sequentially at a predetermined interval, is inserted into each other, so that the cathode and the anode are sequentially from above. The electrode structure (c-2) has a structure in which it is alternately arranged, and also the positive electrode sharing terminal (a) has a plurality of unit positive electrode plates (4-2) having a rectangular plate shape at regular intervals. A plurality of unit negative electrode plates 4-3 in the form of a rectangular plate are connected to the positive electrode structure (a-2) and the negative (-) pole sharing terminal (b) sequentially coupled up and down. Cathode structures (b-2) which are sequentially coupled up and down at regular intervals are assembled in such a manner that they are inserted into each other alternately, and in contrast to the electrode structure (c-1), anodes and cathodes are arranged alternately from above. It is shown.

5 and 6 are structural views showing electrodes of a multi-layer matrix structure in which a plurality of electrode structures c-1 and electrode structures c-2 of the present invention are assembled. Referring to the manufacturing process of the electrode 4-1 of the matrix structure (Matrix) of the present invention,

The electrode 4-1 of the matrix structure of the present invention is coupled while alternately arranging the electrode structure (c-1) and the electrode structure (c-2), a positive (+) pole sharing terminal (a) ) And the negative (-) pole sharing terminal (b) and the unit (+) (-) electrode plate (4-2, 4-3) by allowing an insulator (spacer) to be coupled through the matrix of the present invention (Matrix) It consists of manufacturing the electrode 4-1 of structure.

The unit quantity of the single plate electrode (3-1) provided in the primary electrolytic bath of the present invention and the electrode 4-1 of the multi-layer matrix structure (Matrix) structure provided in the secondary electrolytic bath of the cathode plate The number, size, etc. are designed according to the treatment capacity of the electrolytic cell, and are not particularly limited. The material of the anode in the plate electrode 3-1 and the matrix structure electrode is a titanium base material. It consists of coating one component selected from platinum (Pt), iridium (Ir), ruthenium (Ru) and palladium (Pd) or two or more mixed components, and the material of the negative electrode is selected from titanium or stainless steel, etc. desirable.

3 to 6, the shape of the unit cathode plate 4-2 and unit cathode plate 4-3 constituting the electrode 4-1 of the matrix structure of the present invention is mesh. Although one embodiment of the present invention is shown, it is also preferable that the plate-shaped (Punched) hole (Punched hole) unit cathode plate and unit cathode plate.

7 is a view showing a mechanism in which charge is accumulated in a microbial cell membrane, and FIG. 8 is a charge accumulated in the microbial cell membrane during electrolysis by a single flat electrode of the prior art and an electrode of a matrix structure of the present invention. As a comparison diagram showing the mechanism, with reference to FIGS. 7 and 8,

As shown in FIG. 7, when power is applied to the electrode, positive charge is charged outside the microorganism on the anode side, and negative charge is charged on the cathode side, and inside the microbial cell membrane. On the contrary, the charge accumulates, and as shown in FIG. 8, the charge accumulation of the microbial cell membrane by the single flat electrode of the prior art is charged in a single form. In the present invention, the electrode of the matrix structure has alternating charge accumulation on the microbial cell membrane due to the structure in which the positive and negative electrodes are alternately arranged alternately. It can be seen that the charge accumulation differs from that of the flat plate electrode.

9 and 10 are diagrams illustrating a microbial cell membrane destruction process during electrolysis by a single flat plate electrode of the prior art and an electrode of a matrix structure according to the present invention.

9 and 10, the destruction of the microbial cell membrane by a single plate-shaped electrode of the prior art shows a kind of charging form, so the cell membrane destruction can be expected only by the compression action of the microbial cell membrane. The electrode of the matrix structure has alternating charge and accumulation of the microbial cell membrane due to the alternating arrangement of the positive and negative poles, and the contraction and expansion of the cell membrane is repeated. It can be seen that the solubilization is accelerated by the fatigue failure caused by the repeated action, so that the electrode of the matrix structure of the present invention can destroy the cell membrane more efficiently than the single flat electrode of the prior art, so that the solubilization of high efficiency is possible. It can be seen that is made.

11 is a comparative view showing the energy consumption of the prior art one-step electrolysis method and the two-stage electrolysis method according to the present invention.

As shown and described in Figures 1 to 3, the two-stage electrolytic method according to the first electrolytic bath (3) and the second electrolytic bath (4) of the present invention concentrates the inlet sludge into the electrolytic flotation in the first stage electrolysis, In the process, about 60% of the effluent is returned to the bioreactor 1 without being affected by electrolysis. In the second stage electrolysis, only 40% of the concentrated sludge concentrated in the first stage is introduced and solubilized. As shown in Fig. 11, it is shown that the energy consumption rate is only 40% compared with the conventional one-stage electrolysis method, which is based on the same energy consumption, solubilizing the sludge in the secondary electrolyzer, that is, By digesting low molecular weight organic sludge into digester, it can be digested more quickly and efficiently than existing extinguishing methods. The improved effect of reducing the water content of the cake can also be achieved together.

A: Solubilization and dewatering system of organic sludge according to the present invention
1: bioreactor 2: precipitation tank
5: digester 6: dehydrator
3: primary electrolytic bath 3-1: plate type electrode
4: Secondary Electrolyzer 4-1: Electrode of Multi-layer Matrix Structure
4-2: unit anode plate 4-3: unit cathode plate
a: anode sharing terminals a-1 and a-2: anode structure
b: Cathode sharing terminal b-1 and b-2: Cathode structure
c-1 and c-2: electrode structure

Claims (6)

In the bioreaction tank (1) in which sewage and wastewater are introduced and biologically treated, in a sedimentation tank (2) in which solid-liquid separation is introduced by inflowing the mixed mixture of suspended solids after the bioreaction, and outflow (discharge) of the treated water, and in the settling tank (2). Primary electrolysing tank (3) for introducing sludge separated from treated water and concentrating by electrolytic flotation, secondary electrolyzer (4) for introducing and solubilizing only concentrated sludge of primary electrolyzer and solubilizing sludge of secondary electrolyzer It consists of a digester (5) for inflow and digestion and a dehydrator (6) for dehydrating the waste sludge discharged from the digester,
The primary electrolytic bath 3 is provided with an electrode 3-1 having a structure in which a plate-shaped unit anode and a unit cathode are alternately arranged,
In the secondary electrolytic bath 4, the electrode 4-1 having a multi-layer matrix structure in which the unit positive electrode plates 4-2 and the unit negative electrode plates 4-3 are alternately arranged in the longitudinal and horizontal directions to form a multi-layer is formed. A solubilization and extinguishing system of organic sludge by a two-stage electrolytic method using an electrolytic device having an electrode having a multi-layered matrix structure. The electrode structure 4-1 of claim 1, wherein the electrode structure c-1 and the electrode structure c-2 have a positive polarity sharing terminal a and a negative polarity hole. Electrolytic electrode having a multi-layer matrix structure, characterized in that the electrode is a multi-layer matrix structure consisting of alternatingly arranged and alternately arranged between the terminal terminal (b) and the unit quantity, the cathode plate via an insulator (spacer). Solubilization and extinguishing system of organic sludge by two-stage electrolysis method using device. The material of the electrode 3-1 having a structure in which a plate-shaped unit anode and a unit cathode are alternately arranged is a cathode of platinum (Pt) and iridium (Ir). , An electrolytic device having an electrode having a multi-layered matrix structure, characterized in that it is coated with one or two or more components selected from ruthenium (Ru) and palladium (Pd), and the cathode is made of titanium or stainless steel. Solubilization and extinguishing system of organic sludge by using two stage electrolysis method. The material of the electrode 4-1 of the matrix structure according to claim 1 or 2, wherein the anode is selected from platinum (Pt), iridium (Ir), ruthenium (Ru), and palladium (Pd) in a titanium base material. Solubilization of the organic sludge by a two-step electrolytic method using an electrolytic device having an electrode having a multi-layer matrix structure, characterized in that the coating is made of one component or a mixture of two or more components, the cathode is made of titanium or stainless steel and Digestive system. The method according to claim 1 or 2, wherein the primary electrolytic bath 3 and the secondary electrolytic bath 4 are open or closed electrolytic baths. Reduction and digestion system of organic sludge The multi-layer matrix structure of claim 1 or 2, wherein the unit positive electrode plate 4-2 and the unit negative electrode plate 4-3 are made of plate, mesh or punctured holes. An organic sludge reduction and extinguishing system using a two-stage electrolytic method using an electrolytic device equipped with electrodes.

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