KR20170109124A - Development of Agitator by using Dynamic Microbial Electrochemical Cells - Google Patents

Abstract

The present invention relates to an agitator for an anaerobic digester using dynamic microbial electrochemical cells. In a reaction tank storing organic wastes and provided with a reducing electrode part, a stirring impeller, on which an oxidation electrode part provided to protrude and forming wings on a rotary shaft part rotated by a rotation motor, is arranged at the inner circumference thereof so as to maximize the transfer efficiency of positive ion materials while supplying an electrical power source to the reducing electrode part and the oxidation electrode part, and to minimize internal resistance, thereby maximizing the organic matter removal efficiency of a single reaction tank and the biogas generation amount such as methane, and making scale-up for practical use of the reaction tank possible.

Description

Technical Field [0001] The present invention relates to an anaerobic digester agitator using a dynamic microbial electrochemical electrode,

The present invention relates to the development of an anaerobic digester agitation device using a dynamic microbial electrochemical electrode.

Anaerobic digestion produces biogas (methane, etc.) by treating various organic wastewater or slurry organic wastes with a high content of organic matter such as sewage sludge, food waste, agriculture and animal wastes, manure, wastewater, pulp and paper wastewater, Technology.

The general anaerobic digestion process is divided into hydrolysis, acid fermentation, and methane fermentation. In the hydrolysis process, the polymer organic substance is decomposed into low molecular (monomer) organic substances. In the acid fermentation process, low molecular organic substances are decomposed into organic acids, In the methane fermentation process, organic acids such as acetic acid, carbon dioxide, and hydrogen are converted to methane by methanogenic bacteria.

The anaerobic digestion is characterized by various rates of organic decomposition rate, methane gas generation rate, and contents depending on various variables such as the species of the adapted microorganisms, characteristics of the substrate, and temperature. In order to operate a smooth anaerobic digestion process, it is important that the hydrolysis process, which is a rate-limiting step, is effectively decomposed. Methane-producing bacteria in the methanogenesis process are relatively slow in growth rate and are very sensitive to environmental factors such as pH, temperature, toxic substances, etc. Therefore, the total anaerobic It is the most important step due to stabilization in digestion process. Actually, it takes from 2 months to more than 9 months until methane generation stabilizes from the start of operation.

In order to overcome the anaerobic digestion problem and to maximize the amount of methane generation, a method such as high-temperature acid fermentation and two-phase pretreatment such as high temperature, high pressure and ultrasonic wave in the hydrolysis process and acid fermentation step, Various methods have been suggested such as adhesion media, addition of trace elements, improvement of agitation efficiency, and upflow anaerobic digestion. However, it has been difficult to present them as a clear countermeasure.

In recent years, bio-electrochemical technology (BET) such as MFC (Microbial Fuel Cell) and MEC (Microbial Electrolysis Cell) has received great attention as a sustainable renewable energy production technology. When applied to anaerobic digestion tank, it is possible not only to rapidly decompose high-concentration organic wastes but also to decompose volatile fatty acids (VFAs), toxic substances and non-biodegradable substances by electrochemical reactions and to perform electrochemical methane reduction It is known that it is possible to maximize the generation of methane gas through various methods of biological electrochemical technology.

Early biochemical electrochemical techniques were mainly focused on MFC and MEC technologies that produce electricity or hydrogen gas depending on the type of the final electron acceptor in a two-chamber reduction electrode where a membrane is present. Recently, however, (Zhang et al., 2010; Wang et al., 2010). In this study, we investigated the effect of methane production in a single anaerobic digester.

Since this internal resistance is a factor that must be overcome for the scale-up of a single-tank electrochemical technique, most of the preceding biological electrochemical reactors require the distance between electrodes to be as close as possible to minimize internal resistance, (Call and Logan, 2008, Cheng and Logan, 2007) to maximize mass transfer. In addition, since the electrode, which is a core element of the internal resistance, is installed separately in the reaction vessel, it can not escape from problems such as reduction of the residence time, lowering of stirring efficiency, and deterioration of the transferring ability of the cation material.

Most of these biological electrochemical reactors can not overcome the mass transfer, which is a major factor of internal resistance, and show a limit to the scale-up for commercialization.

Patent Registration No. 10-1016781 (Feb. 15, 2011)

An object of the present invention is to provide an anaerobic digester agitator using a dynamic microorganism electrochemical electrode that maximizes the transfer of cation material and minimizes internal resistance by combining a stirrer necessary for an anaerobic digestion tank with a conductive cell required for an electrochemical reaction tank .

It is another object of the present invention to provide an anaerobic digester agitation apparatus using a dynamic microorganism electrochemical electrode capable of maximizing current density by placing a reducing electrode around a side surface in a reaction tank and scaling up the reaction tank for practical use .

In order to achieve the above object, an anaerobic digester tank agitation apparatus using a dynamic microbial electrochemical electrode according to the present invention comprises a reaction tank having an internal side on which organic wastes can be stored and a reducing electrode on the inner side, A rotating motor for rotating the stirring impeller, and a power supply unit for supplying electric power to the reducing electrode unit and the oxidizing electrode unit, wherein the oxidizing electrode unit includes: .

In the present invention, the reduction electrode unit may be formed directly on the surface around the inner surface of the reaction tank, or may be integrally manufactured with the reaction tank by forming the side surface portion of the reaction tank with a conductive material, or may be separately manufactured and installed in the reaction tank.

In the present invention, a contact type fixed electrode unit for electrically connecting to the power supply unit is provided on an upper side of the rotary shaft unit. The contact type fixed electrode unit has a ring shape through which the rotation axis part is coupled, And a wire connecting part electrically connected to the power supply part through a wire to apply an electric power to the shaft contact part.

In the present invention, the oxidation electrode portion may include a plurality of fixed electrode plate members protruding from both sides of the rotary shaft portion, and a plurality of separation electrode plate members detachably coupled to the fixed electrode plate member.

In the present invention, the oxidation electrode unit may further include an electrode plate coupling member having electrode plate coupling grooves on both sides of which the fixed electrode plate member or the separation electrode plate member is coupled.

In the present invention, one electrode line including one fixed electrode plate member and at least one separating electrode plate member may be arranged in plural so as to be spaced apart in the longitudinal direction of the rotating shaft portion.

In the present invention, the oxidation electrode unit includes an electrode plate fixing member provided on both sides of the rotary shaft unit, and an electrode plate member fixedly connected to the rotary shaft unit and electrically connected to the electrode plate fixing member, . ≪ / RTI >

The electrode plate fixing member may include a plurality of fixing plates protruding from both sides of the rotary shaft portion, a plurality of separation plates detachably coupled to the fixing plate, and a plate fixing groove portion into which the fixing plate or the separation plate is inserted, .

In the present invention, the power supply unit may apply a voltage of 1.0 to 1.2 V to the reduction electrode unit and the oxidation electrode unit.

The potential of the oxidized electrode portion may be -0.1V to 0.5V, and the potential of the reducing electrode portion may be -0.3V to 1.2V.

In the present invention, the stirring impeller can be rotated at 10 to 200 rpm with the rotary motor.

In the present invention, the anaerobic digester agitator using the dynamic microbial electrochemical electrode has excellent efficiency of cationic substance transfer and can be applied to a reaction vessel of more than 100 mL.

The present invention has the effect of maximizing the removal efficiency of organic substances in a single reaction tank and the biogas generation amount such as methane by maximizing the cation material transferring power and minimizing the internal resistance by combining the agitator required for the anaerobic digestion tank and the conductive cell necessary for the electrochemical reaction tank .

In addition, the present invention can maximize the current density in the reaction tank by arranging the reducing electrode around the side surface in the reaction tank, enable the scale-up for practical use of the reaction tank, It is possible to effectively remove the biogas, and to stably secure the generation amount of the biogas.

1 is a schematic view showing an embodiment of an anaerobic digester agitation apparatus using a dynamic microorganism electrochemical electrode according to the present invention.
FIG. 2 is a schematic view showing another embodiment of an anaerobic digester agitator using a dynamic microorganism electrochemical electrode according to the present invention. FIG.
3 is a perspective view showing an embodiment of an agitating impeller in an anaerobic digester agitator using a dynamic microbial electrochemical electrode according to the present invention.
FIG. 4 is a front view showing an embodiment of an agitating impeller in an anaerobic digester agitator using a dynamic microbial electrochemical electrode according to the present invention. FIG.
5 is a perspective view showing another embodiment of an agitation impeller in an anaerobic digester agitation apparatus using a dynamic microbial electrochemical electrode according to the present invention.
6 is a detailed view showing an example of a contact type fixed electrode part in an anaerobic digester agitation device using a dynamic microbial electrochemical electrode according to the present invention.

Hereinafter, the present invention will be described in more detail.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to the detailed description of the present invention, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms. Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

FIG. 1 is a schematic view showing an embodiment of an anaerobic digester agitator using a dynamic microorganism electrochemical electrode according to the present invention, FIG. 2 is a schematic view of a anaerobic digester agitator using a dynamic microorganism electrochemical electrode according to the present invention, 1 is a schematic view showing an embodiment.

Referring to FIGS. 1 and 2, the anaerobic digester tank agitation apparatus using the dynamic microbial electrochemical electrode according to the present invention includes a reaction tank 10 in which organic waste is stored. The organic waste is decomposed into biogas such as carbon dioxide and methane, sludge and the like by biological and / or electrochemical reaction in the reaction tank 10.

The upper part of the reaction tank 10 is provided with a gas discharge tube 12 for discharging biogas such as methane generated from the organic waste in the inside thereof to the gas collecting part. 12a.

The gas collection valve 12a controls the discharge amount of the biogas discharged into the gas discharge pipe portion 12 by opening and closing the flow passage of the gas discharge pipe portion 12.

An upper portion of the reaction tank 10 is provided with a waste inflow pipe portion 13 for introducing organic waste into the reaction tank 10 and an inflow control valve 13a is installed in the waste inflow pipe portion 13.

The inflow control valve 13a controls the inflow amount of the organic waste flowing into the reaction tank 10 by opening and closing the flow passage of the waste inflow pipe 13.

A waste discharge tube 14 for discharging the organic waste reacted in the reaction tank 10 is provided on the lower surface of the reaction tank 10 and a discharge control valve 14a is installed on the waste discharge tube 14 .

The discharge control valve 14a controls the discharge amount of the organic waste discharged to the outside from the reaction tank 10 by opening and closing the flow passage of the waste discharge pipe 14.

A reducing electrode unit (11) is provided around the inner surface of the reaction tank (10).

The reduction electrode unit 11 is formed to include an electrically conductive material. Specifically, the electrically conductive material may be a metal, an alloy, an electrically conductive carbon material, an electrically conductive polymer, or a combination thereof. Specifically, An alloy including one or more of the above metals may be used as the alloy, and stainless steel or the like may be applied to the alloy . As the electrically conductive carbon material, graphite, electrically conductive carbon black, or the like can be applied. The electrically conductive material to be applied to the reduction electrode portion 11 may be stainless steel, iron, or both.

The shape of the composite material including the electrically conductive material (such as fiber shape), the shape coated with the electrically conductive material, or the shape made of the electrically conductive material may be applied.

When the reduction electrode unit 11 is provided around the inner surface of the reaction tank 10, the reduction electrode unit 11 having a comparatively large area is secured in comparison with the volume of the organic waste contained in the reaction tank, It is possible to smoothly move the material generated in the oxidation electrode unit 30. In addition, it is possible to maximize the current density applied to the electrochemical reaction, and to scale up the anaerobic digester with electrochemical technology that could only be operated on a small experimental scale.

An agitating impeller 20 having wings formed by the oxidation electrode unit 30 is rotatably disposed in the reaction tank 10.

The stirring impeller 20 is rotated at the center of the reaction tank 10 to stir the organic waste stored in the reaction tank 10.

The stirring impeller 20 includes a rotating shaft portion 21 connected to the rotating motor 40 and rotated and a plurality of oxidizing electrode portions 30 protruding from the outside of the rotating shaft portion 21.

The oxidation electrode unit 30 protrudes from the outside of the rotary shaft unit 21 to stir the organic waste in the reaction tank 10 and to generate an electrochemical reaction with the reduction electrode unit 11 .

The oxidation electrode unit 30 is formed to include an electrically conductive material. Specifically, the electrically conductive material may be a metal, an alloy, an electrically conductive carbon material, an electrically conductive polymer, or a combination thereof. Specifically, An alloy including one or more of the above metals may be used as the alloy, and stainless steel or the like may be applied to the alloy . As the electrically conductive carbon material, graphite, electrically conductive carbon black, or the like can be applied. The shape of the composite material including the electrically conductive material (such as fiber shape), the shape coated with the electrically conductive material, or the shape made of the electrically conductive material may be applied.

The electrically conductive material applied to the oxidation electrode portion 30 may be stainless steel, iron, or both.

The rotating motor 40 receives the electric power and generates rotating force to rotate the stirring impeller 20.

When the stirring impeller 20 rotates, the cation materials including hydrogen ions generated on the oxidizing electrode unit 30 rotate together with the movement of the organic waste that is a fluid, 10 in the direction of the reducing electrode unit 11, and is capable of effective cation mass transfer in the reaction tank.

The reducing electrode unit 11 has a cylindrical shape surrounding the stirring impeller 20.

The reduction electrode unit 11 and the oxidation electrode unit 30 are connected to a power supply unit 50 and are respectively supplied with electric power and are electrically connected to the power supply unit 50 at an upper side of the rotation axis unit 21. [ A contact type fixed electrode unit 60 is provided.

The power supply unit 50 is electrically connected to the reduction electrode unit 11 and the contact type fixed electrode unit 60 by a conductive wire 51 and is electrically connected to the oxidation electrode 60 through the contact type fixed electrode unit 60. [ As shown in Fig.

Embodiments of the contact-type fixed electrode are described in more detail below.

Referring to FIG. 1, the reaction tank 10 may have a reduction electrode portion 11 surrounding the oxidation electrode portion on the inner surface thereof.

The reduction electrode unit 11 may be formed directly on the surface around the inner surface of the reaction tank 10.

The reducing electrode unit 11 may have an outer diameter and a shape corresponding to the inner diameter so as to abut the inner surface of the reaction tank 10 and may be attached to the inner surface of the reaction tank 10, have.

The reduction electrode unit 11 may be integrally formed with the reaction tank 10 by forming a part or all of the side surface of the reaction tank 10 with an electrically conductive material.

Referring to FIG. 2, an electrode support 15 for supporting the reduction electrode unit 11 may be provided on the inner surface of the reaction tank 10.

The electrode support 15 protrudes from the inner surface of the reaction tank 10 to support the lower portion of the reduction electrode unit 11 and a lower support unit 15a supporting the lower support unit 15a. And a latching support portion 15b protruding upward to support the inside of the reduction electrode portion 11.

The reduction electrode unit 11 is appropriately sized depending on the size of the reaction tank 10 so that it can be lifted up on the lower support unit 15a between the engagement support unit 15b and the inner surface of the reaction tank 10. [ And may be formed in a cylindrical shape having an outer diameter that can be lifted up on the lower support portion 15a between the inner surfaces of the reaction tank 10.

FIG. 3 is a perspective view showing an embodiment of an agitation impeller 20 in an anaerobic digester agitator using a dynamic microbial electrochemical electrode according to the present invention, and FIG. 4 is a perspective view showing a dynamic microbial electrochemical electrode according to the present invention. FIG. 1 is a front view showing an embodiment of an agitation impeller 20 in an anaerobic digester tank agitation apparatus.

3 and 4, the oxidation electrode unit 30 includes a plurality of fixed electrode plate members 31 protruding from both sides of the rotary shaft unit 21, The current density can be controlled through the number of the separation electrode plate members 32 including the plurality of separation electrode plate members 32 to be coupled.

The electrode unit 30 includes an electrode plate connecting member 33 having electrode plate coupling grooves 33a to which the fixed electrode plate member 31 or the separating electrode plate member 32 is coupled, ).

The electrode plate connecting member 33 may be formed in a rod shape and may have a plurality of electrode plate engaging groove portions 33a spaced from each other in the longitudinal direction on both sides thereof, The groove portion 33a may be provided in a straight shape.

The fixed electrode plate member 31 is coupled to the electrode plate coupling groove 33a at one side of the electrode plate connection member 33 and the electrode plate coupling groove 33a is formed at the other side of the electrode plate connection member 33. [ The separator plate member 32 may be coupled to the separator plate 33a.

The separator plate member 32 may be coupled to the electrode plate coupling groove 33a on both side surfaces of the electrode plate connection member 33, respectively.

The fixed electrode plate member 31, the separating electrode plate member 32 and the electrode plate connecting member 33 are made of a conductive material (electric conductive material) and are supplied with electric power from the rotating shaft portion 21 .

One electrode line formed by one of the fixed electrode plate members 31 and the at least one separating electrode plate member 32 may be arranged in plural so as to be spaced apart in the longitudinal direction of the rotary shaft portion 21. [ The organic waste is passed through the spaces between the electrode rows to reduce the resistance of the stirring impeller 30 so that the stirring impeller 30 can smoothly rotate to improve the stirring efficiency.

5 is a perspective view showing another embodiment of the stirring impeller 20 in the anaerobic digester agitator using the dynamic microorganism electrochemical electrode according to the present invention, The electrode plate fixing member 34 and the electrode plate fixing member 34 are provided on both sides of the electrode plate fixing member 34. The electrode plate fixing member 34 is electrically connected to the rotation axis portion 21, And a plate member (35).

The electrode plate member 35 may be made of an electrically conductive material as described above, and may be made of a metal material such as stainless steel material, or may be made of a non-metal conductive material such as graphite or conductive fiber body.

The electrode plate fixing member 34 includes a plurality of fixing plates 34a protruding from both sides of the rotary shaft 21, a plurality of separation plates 34b detachably coupled to the fixing plate 34a, And a plate connecting body 34c having a plate fixing groove portion 34d into which the fixing plate 34a or the separating plate 34b is inserted, respectively.

The fixing plate 34a, the separating plate 34b, and the plate connecting body 34c may be made of nonconductive material.

The plate connecting body 34c may be formed in a rod shape and may have a plurality of plate locking grooves 34d spaced apart from each other in the longitudinal direction on both sides thereof. May be provided in a straight line.

The fixing plate 34a is coupled to the plate fixing groove 34d on one side of the plate connector 34c and the plate fixing groove 34d is formed on the other side of the plate connector 34c. (34b) can be coupled.

In addition, the separating plate 34b may be coupled to the plate fixing groove 34d on both side surfaces of the plate connector 34c.

The fixing plate 34a and the separator plate 34b may be provided with electrode mounting holes 36 for mounting the electrode plate members 35. The electrode mounting holes 36 may be formed in the fixing plates 34a, And a separation plate 34b located at the most end side of the separation plate 34b, that is, the separation plate 34b which is farthest from the fixing plate 34a.

The electrode plate member 35 may be bolt-fastened through the electrode mounting hole 36, and may be modified in various ways using a known coupling structure that is provided through holes.

6 is a detailed view showing an example of the contact type fixed electrode unit 60 in the apparatus for anaerobic digestion tank agitation using the dynamic microorganism electrochemical electrode according to the present invention. Referring to FIG. 6, The unit 60 includes a shaft contact portion 61 having a ring shape through which the rotary shaft portion 21 is coupled and which is in contact with the rotary shaft portion 21 on the inner circumferential surface thereof, And a wire connection portion 62 electrically connected to the shaft contact portion 61 to apply electric power to the shaft contact portion 61.

That is, the rotary shaft portion 21 is in contact with the shaft contact portion 61 and is electrically connected to the power supply portion 50, thereby enabling stable supply of power to the oxidation electrode portion 30.

The apparatus for anaerobic digester agitation using the dynamic microbial electrochemical electrode according to the present invention is characterized in that an electric power is supplied to the oxidation electrode unit (30) rotating using the contact type fixed electrode unit (60) When the conductive line 51 is connected to the rotary shaft 21 of the impeller 20, the problem of short-circuiting of the conductive line 51 is solved and a stable electrical reaction can be performed.

In the apparatus for anaerobic digester agitation using the dynamic microorganism electrochemical electrode according to the present invention, a voltage of 1.0 to 1.2 V is applied to the reduction electrode unit 11 and the oxidation electrode unit 30 in the power supply unit 50, . The rotary motor 40 can rotate the impeller 20 at a speed of 10 to 200 rpm to maximize the movement of the fluid and the transfer of the cation material by the rotational force generated by the stirring.

More specifically, the potential applied to the oxidized electrode portion may be adjusted to -0.1V to 0.5V, and the potential applied to the reducing electrode portion 11 may be adjusted to -0.3V to 1.2V. The organic waste in the reaction tank 10 is oxidized by the role of an electrode of the oxidation electrode unit 30, and generates electrons and hydrogen ions. The electrons generated from the oxidized organic waste are transferred to the surface of the inner side of the reaction tank 10, that is, to the reducing electrode unit 11, and cations such as hydrogen ions are directly transported by the rotational motion of the stirring impeller 20 And is transferred to the reduction electrode unit 11 to maximize the mass transfer force.

More specifically, on the surface of the oxidation electrode unit 30, as shown in the following reaction formula 1, the biological methane generation reaction by the microorganism and the organic acid which is the product of the acid production reaction are electrochemically decomposed, , An electrochemical oxidation reaction proceeds as shown in Reaction Scheme 2 for producing carbon dioxide.

However, in anaerobic digestion of existing organic wastes, the pH of anaerobic digestion is lowered due to the accumulation of organic acids, so that the microorganisms are not activated and the methane fermentation is inhibited In the present invention, in the present invention, by the reaction such as conversion of organic acid such as CH ₃ COOH into CO ₂ by electrical oxidation in an electrode (particularly, an oxidation electrode) (see the following reaction formula) Oxidation and methane fermentation can be performed stably.

[Reaction Scheme 1]

Biological reaction: Methanogenesis (conversion of about 70% CH ₃ COOH to CH ₄ )

_{CH 3 COOH → CH 4 + 2CO} 2 + energy

[Reaction Scheme 2]

Electrochemical Anode reaction

_{CH 3 COOH + 2H 2 O →} 2CO 2 + 8H + + 8e -

In addition to biological methane fermentation, it is possible to generate secondary methane by electrochemical synthesis at the reduction electrode as shown in the following reaction formula, thereby achieving high-speed methane fermentation compared to conventional anaerobic digestion.

[Reaction Scheme 3]

Electrochemical Cathode Reaction

CO ₂ + 8H ⁺ + 8e ^- ? CH ₄ + 2H ₂ O

On the other hand, problems such as the transferring ability of cationic materials, which have been obstacles to practical use of the electrochemical oxidation-reduction reaction, have been resolved by applying a new material to the anaerobic digestion tank and applying suitable materials thereto. Specifically, It is possible to maximize the amount of generated biogas such as methane and the organic removal efficiency of the single reaction tank 10 by maximizing the cation material transferring power and minimizing the internal resistance by combining the conductive cells necessary for the agitator and the electrochemical reaction tank 10.

In addition, the present invention can maximize the current density by arranging the reducing electrode around the inner side of the reaction tank 10, enable the scale-up for practical use of the reaction tank 10, It is possible to effectively remove the organic matter in the biosensor 10 for a long period of time and to securely generate the biogas generation amount.

It will be understood by those skilled in the art that various changes and modifications may be made without departing from the scope of the present invention.

10: Reaction tank 11: Reduction electrode part
12: gas discharge tube part 12a: gas collection valve
13: waste inlet pipe portion 13a: inflow control valve
14: Waste discharge pipe 14a: Discharge control valve
15: electrode support 15a:
15b: engaging support portion 20: stirring impeller
21: rotating shaft 30: oxidizing electrode part
31: fixed electrode plate member 32: separation electrode plate member
33: electrode plate connecting member 33a: electrode plate connecting groove portion
34: electrode plate fixing member 34a: fixed plate
34b: separating plate 34c: plate connecting body
34d: plate fixing groove portion 35: electrode plate member
36: Electrode mounting hole 40: Rotary motor
50: power supply part 51: conductor
60: contact type fixed electrode part 61:

Claims (8)

A reaction tank in which organic waste can be stored therein,
An agitating impeller rotatably disposed in the reaction tank and having an oxidizing electrode portion protruding from the rotating shaft portion to form a blade,
A rotating motor for rotating the stirring impeller;
A power supply unit for supplying electric power to the reduction electrode unit and the oxidation electrode unit;
An anaerobic digester agitating device using a dynamic microbial electrochemical electrode including an anaerobic digester. The method of claim 1,
The reducing electrode unit may be formed directly on the inner circumferential surface of the reaction vessel, or may be manufactured integrally with the reaction vessel by forming a side portion of the reaction vessel with a conductive material, or may be manufactured separately using a dynamic microbial electrochemical electrode Anaerobic digester agitation device. The method of claim 1,
A contact type fixed electrode unit for electrically connecting to the power supply unit is provided on an upper side of the rotary shaft unit,
The contact type fixed electrode unit includes a shaft contact portion having a ring shape through which the rotary shaft portion is coupled and connected to the rotary shaft portion on an inner circumferential surface of the shaft contact portion, a wire electrically connected to the power supply portion through a lead wire, An anaerobic digester agitation device using a dynamic microbial electrochemical electrode including a connection. The method of claim 1,
The oxidation electrode portion
A plurality of fixed electrode plate members protruding from both sides of the rotary shaft portion,
And a plurality of separating electrode plate members detachably coupled to the fixed electrode plate member, wherein the electrochemical microbial electrochemical electrode is used for stirring the anaerobic digester. 5. The method of claim 4,
Wherein the oxidation electrode unit further comprises an electrode plate coupling member having electrode plate coupling grooves on both sides of which the fixed electrode plate member or the separation electrode plate member is coupled. 5. The method of claim 4,
Wherein a plurality of electrode rows including one fixed electrode plate member and at least one separating electrode plate member are arranged in a longitudinal direction of the rotary shaft portion so as to be spaced apart from each other in the longitudinal direction of the rotary shaft portion. The method of claim 1,
The oxidation electrode portion
An electrode plate fixing member provided on both sides of the rotary shaft portion,
And an electrode plate member coupled to the electrode plate holding member and electrically connected to the rotating shaft unit and formed of a conductive material. 8. The method of claim 7,
The electrode plate fixing member
A plurality of fixed plates projecting from both sides of the rotary shaft,
A plurality of separation plates detachably coupled to the fixing plate,
And a plate connecting member having plate fixing grooves for inserting the fixing plate or the separating plate on both sides thereof, respectively, in the anaerobic digester.

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