KR101077825B1 - Electrically active bacteria Fusion Equipment for electricity generation and wastewater treatment - Google Patents

Abstract

The present invention relates to an electroactive bacterium fusion device for electricity production and wastewater treatment, which will be described in more detail, so that anaerobic conditions and aerobic conditions are formed in the oxidation portion structurally to treat wastewater by microorganisms and simultaneously By modularizing the unit that can generate electricity and wastewater treatment, electricity generation and wastewater treatment can be selectively adjusted according to the amount of wastewater treatment required, and can be used without any design changes to existing activated sludge tanks. An electroactive bacteria fusion device for wastewater treatment.

Electro-Active Bacteria Fusion Device, Oxidation Unit, Reduction Unit, Electric Reaction Unit

Description

Electrically active bacteria fusion equipment for electricity generation and wastewater treatment

The present invention relates to an electroactive bacterium fusion device for electricity production and wastewater treatment, which will be described in more detail, so that anaerobic conditions and aerobic conditions are formed in the oxidation portion structurally to treat wastewater by microorganisms and simultaneously By modularizing the unit that can generate electricity and wastewater treatment, electricity generation and wastewater treatment can be selectively adjusted according to the amount of wastewater treatment required, and can be used without any design changes to existing activated sludge tanks. An electroactive bacteria fusion device for wastewater treatment.

In general, an electroactive battery fusion device is a conventional wastewater by modifying and improving the biofuel cell technology using an electroactive battery called conventional biofuel cells, microbial fuel cells, mud batteries, etc. It is a fusion device of environmental technology and biotechnology with a practical structure that can be applied to a treatment plant.

Microbial fuel cells, on the other hand, use microorganisms as biocatalysts to directly convert the reducing power generated by microorganisms to decompose and oxidize organic matter into electrical energy. The first microbial fuel cell concept was proposed by Potter in 1912, after which in the 1980s Bennetto showed that pure species of bacteria could generate relatively high electricity from organics when artificial electronic media were added. Potter, Proc R Soc Ser B, 1912, 84, 260-276; Bennetto et al., Bioeng., 1983, 25, 559; Bennetto et al., Biotechnol. Lett., 1985, 7, 699]

The electron mediator passes through the microbial membrane, captures and reduces electrons generated during the metabolic process of the microorganism, and then passes through the membrane to move to the anode to transfer electrons to the electrodes, and serves to transfer electrons between the microorganisms and the electrodes. . However, electron mediators can interfere with the continuous operation of the system due to the cost of continuous injection and toxicity of microorganisms.

In 1999, the world's first medium-free microbial fuel cell developed by Dr. Byung-Hong Kim's research team at Korea Institute of Science and Technology enriched and cultured iron-reducing bacteria, anaerobic bacteria, and proved that electricity can be produced by transferring electrons from microorganisms to electrodes without the help of an electronic medium. As a result, research into microbial fuel cells has been actively conducted as a new alternative energy source. [Kim Byung-hong et al., 1999, Korean patent application, 10-1999-0027168; Kim et al., 1999, J. Microbiol. Biotechnol., 9, 127-131; Kim et al., 1999, Biotechnol. Tech., 13, 475-478]

Many microorganisms are able to transfer electrons from organic metabolism directly to the electrode, typically Geobacter sulfurreducens , Shewanella putrefaciens , Clostridium butyricum , Desulfovibrio desulfurcans , Rhodoferax ferrireducens .

However, the above-mentioned microorganisms (electro-active bacteria) have the disadvantage of requiring strict anaerobic conditions or degrading specific organic substances according to substrate specificity, and maintaining difficult operating conditions because their activity is easily affected by external environmental changes. There are limitations.

In the case of mixed culture of various electroactive bacteria, it is expected that the use of the substrate is widened, and thus, it is expected that the wastewater containing a large amount of organic matter can be used as fuel to generate electricity simultaneously with the wastewater treatment. However, when the wastewater is injected, the amount of electricity generated is significantly lower than that of pure substrates such as glucose and acetate, and the organic removal rate is also reported to be low. Alterman et al., Wat. Sci. Technol., 2006, 54 (8), 9-15]

In addition, the microbial fuel cells using the electroactive bacteria fusion device, that is, reported so far, are obtained from a small reactor on a laboratory scale. In addition, these devices have various problems such as difficulty in enriching culture of electroactive bacteria, demanding operating conditions for optimum activity of microorganisms, internal resistance due to the movement of hydrogen ions to the cathode, and reduction in efficiency due to diffusion of oxygen into the anode. It is interspersed with low electricity generation and wastewater treatment efficiency.

As an example of a medium-free microbial fuel cell (electro-active bacterial fusion device) using the above-mentioned electroactive bacteria in the Republic of Korea Patent No. 332932 "Bio fuel cell using activated sludge for wastewater and wastewater treatment", positive and negative electrodes, A biofuel cell consisting of a conductive medium of these anodes and cathodes and an exchange membrane used between these two poles and containing activated sludge and wastewater at the cathode portion is proposed.

However, in the present invention, there is a hassle to form an anaerobic condition by separately injecting nitrogen to the cathode, and to form an aerobic condition by separately injecting oxygen into the anode, and structurally, efficiency due to diffusion of oxygen into the oxidizing unit (oxide electrode). There is a problem of deterioration, and there is a problem in that a design change is required in an activated sludge tank when applied to a wastewater treatment plant.

Accordingly, an object of the present invention for solving the above-mentioned problems is to structurally generate the anaerobic condition and the aerobic condition in the reducing part to enable the wastewater treatment simultaneously with the generation of electricity by the electroactive bacteria and the like without a separate device. In addition, the present invention aims to provide an electro-active bacterium fusion device as far as possible, while producing electricity directly without changing the design structure in the existing wastewater treatment plant.

In order to achieve the above object, an electroactive bacterium fusion device for electricity production and wastewater treatment of the present invention includes an oxidation unit having at least one inlet formed on an upper surface thereof through which wastewater is introduced;

A reducing part in contact with the oxidizing part and formed with a mouth opening at an upper end thereof; The oxidizing part and the reducing part are separated and protrude in a downward direction to form a flow path from the oxidizing part to an acidic reducing part in the lower part, and an anode in the direction of the oxidation part is connected to a reducing electrode in the direction of the reducing part. Characterized in that the one or more microbial fuel cell unit consisting of; an electric reaction unit formed with an exchange membrane.

Electro-active bacterium fusion device for electricity production and wastewater treatment of the present invention is formed by the assembly of the microbial fuel cell unit, when the unit is assembled to the junction of the oxidation unit and the reducing unit of the unit and the other unit direction of the oxidation unit It is preferred that the junction electrode reaction part is formed such that the anode is formed with a hydrogen ion exchange membrane between the cathode in the direction of the reduction part.

In one embodiment of the present invention, the overflow port is formed at the upper end of the reducing part, and is configured to be lower than the level of the oxidation part, so that the natural inflow of wastewater is formed by the water head difference.

The lower part of the reducing unit of the present invention is characterized in that the through-hole is formed so that oxygen by the aeration from the activated sludge tank can be introduced into the reducing unit.

The lower surface of the oxidizing portion of the present invention is configured to form a slope in which the downward gradient is formed in the flow path direction to induce the flow of waste water, it is preferable to prevent the inflow of oxygen into the oxidizing portion.

Each of the anode and the cathode of the present invention is characterized in that the linked inverter is electrically connected.

The present invention is characterized in that the width of the oxidizing portion is configured to be smaller than the width of the reducing portion to structurally form the anaerobic condition of the oxidizing portion.

On the other hand, the present invention can be used by mounting to the existing activated sludge tank, in the case of mounting the present invention to the existing activated sludge tank, the overflow port is mounted (built in) to the activated sludge tank higher than or equal to the level of the bulk solution. It features.

The electroactive bacterium fusion device for electricity production and wastewater treatment of the present invention configured as described above is structurally generated by anaerobic conditions and aerobic conditions in the reducing part, and can be treated simultaneously with the generation of electricity by electroactive bacteria and the wastewater treatment. There is an advantage to this.

In addition, the electroactive bacteria fusion device for electricity production and wastewater treatment of the present invention is directly immersed (installed) in the existing wastewater treatment plant activated sludge tank has the advantage that the wastewater treatment can be produced at the same time to produce electricity directly without changing the design structure.

In addition, the electroactive bacterial fusion device for electricity production and wastewater treatment of the present invention can significantly reduce the energy consumption of the wastewater treatment plant by inducing the aeration to be reduced by using the independent nutritional bacteria in the reduction unit as a biocatalyst of the reduction reaction. There is an economic advantage.

In addition, the electro-active bacteria fusion device for electricity production and wastewater treatment of the present invention has the advantage that can be built in a resource recycling system to cover a part of the wastewater treatment plant power consumption by supplying a constant output through the associated inverter.

In addition, the electroactive bacterium fusion device for electricity production and wastewater treatment of the present invention can be used by assembling a plurality of units capable of producing electricity and wastewater treatment, respectively, its capacity according to the amount of power required and the capacity of wastewater treatment, etc. It can be configured selectively, and the modularity of the unit has the advantage of maximizing the power generation and wastewater treatment efficiency.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred configuration of the present invention.

1 is a perspective view illustrating a state in which an electroactive bacterial fusion device for electricity production and wastewater treatment of the present invention is mounted in an activated sludge tank,

2 is a side cross-sectional view showing a state in which an electroactive bacterial fusion device for electricity production and wastewater treatment of the present invention is mounted in an activated sludge tank,

3A to 3B are side cross-sectional views showing a state in which one unit and two units are assembled in an electroactive bacterial fusion device for electricity generation and wastewater treatment of the present invention,

Figure 4 is a side cross-sectional view showing the operating relationship within the unit in the electroactive bacteria fusion device for electricity production and wastewater treatment of the present invention, Figure 5 is an electroactive bacteria fusion device for electricity production and wastewater treatment of the present invention Is an expected process schematic when applied to an existing wastewater treatment plant operated with standard activated sludge.

Electro-active bacteria fusion device for electricity production and wastewater treatment of the present invention is a microbial fuel cell unit 100 composed of an oxidation unit 110, a reduction unit 120 and the electrical reaction unit 130 is assembled one or more existing It is an apparatus that enables electricity production and wastewater treatment by dipping (mounting) in the activated sludge tank 10.

First, as shown in FIG. 2, the oxidation unit 110 has at least one inlet 111 through which wastewater is introduced into the upper surface thereof, and thus, wastewater from which the primary precipitation is completed from the primary settling tank 2 as shown in FIG. 5. The oxidation unit 110 may be configured in various ways in such a way as to be introduced therein. However, in FIG. 1, for example, the oxidation unit 110 may have a hexahedral shape having a narrow width and a space formed therein.

In addition, it is reasonable that the inclined surface 112 is formed on the lower surface of the oxidizing unit 110, the downward slope in the direction of the flow path 131 to be described later. By the configuration of the inclined surface 112, the flow of wastewater downward from the oxidation unit 110 will be induced to the reduction unit 120, which will be described below, and oxygen is induced from the reduction unit 120 to the oxidation unit 110. Can be prevented. That is, the anaerobic condition of the oxidation unit 110 may be structurally satisfied.

In addition, it is reasonable that the width (D1) of the oxidation unit 110 is configured to be smaller than the width (D2) of the reduction unit 120, the above-mentioned width is the electrical reaction unit 130 and The width D1 of the oxidizing unit 110 is smaller than the width D2 of the reducing unit 120 as the width in the orthogonal direction. In order to induce a downward flow of the wastewater faster than 120 and to satisfy the anaerobic conditions inside the oxidation unit 110. That is, among the various microorganisms present in the wastewater and activated sludge due to anaerobic conditions, only the electroactive bacteria which can use the anode 132 which will be described below as an electron acceptor are advantageous for survival, so that they are formed on the surface of the anode 132. In order to selectively form a concentrated biofilm (a).

The reduction unit 120 may be configured in a variety of shapes of the reduction unit 120 in a configuration in which a space is formed inside the boundary between the oxidation unit 110 and the electric reaction unit 130 to be described below. However, as shown in FIG. 1 and the like, it may be configured to have a hexahedral shape having a wider width (rather than the oxidation part 110) and having a space formed therein. A plurality of through-holes 122 are formed in the lower surface of the reducing unit 120, as shown in FIG. 2, the aeration from the activated sludge tank 10 (the blower 11 and the acid generator 12 interlock with oxygen). Oxygen by the generated) can be introduced into the reduction unit 120. The wastewater flowing from the oxidizing unit 110 by the introduction of oxygen into the reducing unit 120 forms an upward flow with the rise of oxygen, and a biocatalyst is formed on the surface of the reducing electrode 133 to be described below. Hydrogen moved from the oxidizing unit 110, electrons transferred to the reducing electrode 133, and oxygen or combined oxygen (nitrate, etc.) in the reducing unit 120 cause a biochemical reaction, thereby causing a final reduction reaction. .

The outlet portion 121 is formed on the upper end of the outlet port 121, the waste water from which the organic matter is decomposed in the reducing unit 120 through the outlet outlet 121 is discharged to the activated sludge tank 10. . As shown in FIG. 2 and the like, the overflow port 121 is preferably configured to be lower than the water level of the oxidation unit 110 in the upper portion of the reduction unit 120. In this way, the water level of the oxidation unit 110 and the water level of the reduction unit 120 to generate a water head difference in the flow of waste water without any power source structurally from the oxidation unit 110 to the reduction unit 120 To flow. In addition, the present invention can be used by mounting to the existing activated sludge tank 10, in the mounting of the present invention to the existing activated sludge tank 10, as shown in FIG. ) Is immersed (mounted) in the activated sludge tank 10 higher than or equal to the level of the bulk solution 13 of the activated sludge tank 10. That is, the bottom edge of the overflow port 121 is configured to be higher than or equal to the level of the bulk solution 13, thereby preventing the bulk solution 13 from flowing back into the reducing unit 120, and the present invention and the bulk solution By forming a hydrocephalus between the (13) so that the waste water from which the organic matter is finally removed from the reducing unit 120 can flow into the bulk solution (13).

In addition, the microbial fuel cell unit 100, which is one component of the present invention, includes an electric reaction unit 130, and the electric reaction unit 130 divides the oxidation unit 110 and the reduction unit 120. Protruding downward and the flow path 131 of the acid reduction unit 120 from the oxidizing unit 110 is formed in the lower portion, the anode 132 in the direction of the oxidizing unit 110 is the reducing unit 120 The reduction electrode 133 is formed with the hydrogen ion exchange membrane 134 therebetween.

That is, as shown in FIG. 3A, the electric reaction unit 130 flows to communicate the oxidation unit 110 and the reduction unit 120 at a lower portion as a boundary between the oxidation unit 110 and the reduction unit 120. The furnace 131 is configured to be formed. In addition, the electrical reaction unit 130 has an anode 132 is formed on the surface in contact with the oxidation unit 110, a reduction electrode 133 is configured on the surface in contact with the reducing unit 120, the oxidation electrode ( A hydrogen ion exchange membrane 134 is formed between the 132 and the reduction electrode 133 so that the anode 132, the reduction electrode 133, and the hydrogen ion exchange membrane 134 are bolted (not shown in the drawing). Corresponds to the configuration attached by). As such, the anode 132 and the cathode 133 are configured to be in contact with the hydrogen ion exchange membrane 134, thereby minimizing the distance between the electrodes 132 and 133, thereby transferring hydrogen ions as shown in FIG. 4. It is possible to minimize the resistance generated in the.

The anode 132 has a biofilm (a) formed on the surface of the anode 132 selectively by the electroactive bacteria present in the wastewater due to the continuous supply of wastewater by the anaerobic condition of the oxidation unit 110. An environment that can be ignited is created.

Referring to the action of the anode 132 in more detail, according to the anaerobic conditions of the oxidizing unit 110, fermentation microorganisms, anaerobic bacteria, primarily decomposes the polymer organic matter in the wastewater and uses it for metabolism, and then the low molecular form The organics and fermented products of are used as the substrate of the electroactive bacteria dominated on the surface of the anode 132, the electrons generated in the metabolic process of these microorganisms will be described below through the anode 132 without electron media by the reducing power It moves to the reduction electrode 133 to generate electricity. In addition, in addition to generating electricity as described above, organic materials in most wastewater are decomposed in the anode 132 and the oxidation unit 110 to achieve high efficiency wastewater treatment. In addition, electroactive bacteria, which are the dominant species in the anode 132 and the oxidation unit 110, are generally anaerobic bacteria, and their intrinsic cell growth rate is lower than that of aerobic bacteria. In addition, the electroactive bacterium is limited to metabolic energy for cell growth by transferring electrons generated in the metabolic process to the anode 132 and being consumed by an external load, thereby exhibiting a lower cell growth rate than the anaerobic bacteria in general. For this reason, the amount of sludge generated in the oxidation unit 110 as compared with the activated sludge tank 10 can be significantly reduced.

The reduction electrode 133 is to move the electrons from the anode 132 to generate electricity, in the wastewater treatment portion using the reduction electrode 133 as an electron donor and oxygen supplied to the reduction unit 120 Alternatively, an independent nutrient bacterium using combined oxygen (nitrate, sulfate, etc.) as an electron acceptor may be dominated by forming a biofilm on the surface of the cathode 133. That is, the reduction electrode 133 and the reduction unit 120 may be improved in efficiency by using the independent nutrient bacteria as a biocatalyst without using a conventional chemical such as platinum as a catalyst for the cathode 133.

As described above, in the present invention, ammonia nitrogen in the wastewater is nitrified to nitrate in the reducing unit 120 and the reducing electrode 133 where the aerobic conditions are maintained by causing decomposition of most organic matter in the wastewater in the oxidation unit 110. The nitrate is denitrated by nitrogen gas by denitrifying bacteria present on the surface of the cathode 133 so that nitrogen removal can occur at the same time.

The hydrogen ion exchange membrane 134 has a function of selectively permeating hydrogen ions as shown in FIG. 4.

Looking at the action of the microbial fuel cell unit 100 with reference to Figure 4 wastewater is first injected into the dispersion through the inlet 111 of the oxidizing unit 110, a narrow and deep inside the oxidation unit 110 While downward, the organic material is effectively supplied to the electroactive bacterium by contacting the biofilm a on the surface of the anode 132 provided at both sides (one side) of the oxidation unit 110. Waste water moves through the oxidizing unit 110, most of the organic material is consumed by the electroactive bacteria, etc., flows to the reducing unit 120, the reduction unit 120 is decomposed residual organic matter, nitrification of ammonia nitrogen At the same time, on the surface of the cathode 133, using the independent nutrient bacteria as a biocatalyst, hydrogen transferred from the oxidizing unit 110 and electrons transferred to the cathode, and oxygen or combined oxygen (nitrate, etc.) in the reducing unit 120 ) Causes a biochemical reaction, resulting in a final reduction reaction.

The wastewater moved to the upper portion through the reduction electrode 133 flows through the overflow port 121 formed at the upper end of the reduction unit 120 to join the bulk solution 130 of the activated sludge tank 10, and joins the wastewater. As shown in FIG. 5, the organic matter removal and nitrification reaction are induced and then moved to the secondary precipitation tank 3 or the second or third activated sludge tank.

Meanwhile, the electroactive bacterial fusion device for electricity production and wastewater treatment of the present invention is formed by assembling the microbial fuel cell unit 100, and FIG. 3A is a side cross-sectional view showing one microbial fuel cell unit 100. 3B is a side cross-sectional view showing a state in which two microbial fuel cell units 100 are assembled.

As shown in FIG. 3B, when the microbial fuel cell unit 100 is assembled, the junction electric reaction unit 140 is preferably configured between the unit and the unit. In the case of the junction electric reaction unit 140, the anode 132 is also provided. ) And the exchange electrode 133 and the hydrogen ion exchange membrane 134 are formed in the same manner as the electrical reaction unit 130. Therefore, the description of the function of the anode 132, the exchange electrode 133 and the hydrogen ion exchange membrane 134 in the junction electrical reaction unit 140 will be omitted. However, the junction electrical reaction unit 140 has a structure configured at the junction between the unit and the unit when the unit 100 is assembled. As shown in FIG. 3B, the reduction unit 120 and the other unit 100 ′ of the unit 100 are shown. The structure formed at the junction of the oxidation unit 110 ′ of) is presented, and the oxidation electrode 132 of the junction electrical reaction unit 140 is positioned in the direction of the oxidation unit 110 ′, and the reduction unit The reduction electrode 133 of the junction electric reaction unit 140 is positioned in the direction of 120. In this way, when the unit 100 is assembled, the two electrodes 132 and the cathode 133 are opposed to each of the oxidation unit 110 and the reduction unit 120, thereby doubling the electrode surface area. This improves the space for attaching the biofilms (a, b) and consequently doubles the treatment efficiency of the wastewater.

As described above, the plurality of microbial fuel cell units 100 may be coupled to each other, thereby maximizing the amount of power generated per unit volume and improving wastewater treatment efficiency. Meanwhile, in the present invention, as shown in FIG. 5, since the electricity generated from each unit 100 may not be constant, the associated inverter 150 may supply electricity generated from each unit 100 to a constant output according to time. Is further configured.

That is, as shown in FIG. 5, the present invention applied to an actual wastewater treatment plant has a constant according to time because various factors such as environmental conditions, that is, load, microbial activity, dominant microbial concentration, and reduction reaction rate of each unit 100 vary slightly. No positive electricity is generated. Therefore, in order to solve this problem, the unstable electricity collected from each unit 100 is to be able to produce electricity having a constant output through the associated inverter 150.

The associated inverter 150 is a direct / AC converter, and serves to change the direct current electricity supplied from each unit 100 to alternating current electricity. In particular, the linked inverter 150 is to balance the unstable DC electricity generated from each unit 100 with the AC power of the grid line to provide a stable current to the AC load. For example, when the inverter output from each unit 100 is greater than the power that requires a load, the surplus power is supplied to the grid line, and the inverter output from each unit 100 is greater than the power that requires a load. In low cases, insufficient power is supplied from the grid to maintain a stable output.

1 is a perspective view illustrating a state in which an electroactive bacterial fusion device for electricity production and wastewater treatment of the present invention is mounted in an activated sludge tank,

2 is a side cross-sectional view showing a state in which an electroactive bacterial fusion device for electricity production and wastewater treatment of the present invention is mounted in an activated sludge tank,

3A to 3B are side cross-sectional views showing one unit and two units assembled in an electroactive bacterium fusion device for electricity production and wastewater treatment of the present invention;

Figure 4 is a side cross-sectional view showing the operating relationship within the unit, in the electroactive bacteria fusion device for electricity production and wastewater treatment of the present invention,

FIG. 5 is a schematic view of a process expected when the electroactive bacterial fusion device for electricity production and wastewater treatment of the present invention is applied to an existing wastewater treatment plant operated with a standard activated sludge method.

 <Description of the symbols for the main parts of the drawings>

10: activated sludge tank 100: microbial fuel cell unit

110: oxidation unit 120: reduction unit

130: electric reaction unit 131: flow path

132: anode 133: cathode

140: junction electrical reaction unit

Claims (8)

An oxidation part formed on at least one upper surface of the inlet port through which the waste water is introduced; A reducing part in contact with the oxidizing part and formed with a mouth opening at an upper end thereof; The oxidation electrode which protrudes downward while dividing the oxidation part and the reducing part and forms a flow path from the oxidation part to the acidic reducing part in the lower part, and an electrode having an electroactive bacteria predominant in the oxidation part direction is in the reducing part direction. An electroactive bacterial fusion device for electricity production and wastewater treatment consisting of assembling one or more microbial fuel cell unit consisting of an electric reaction unit is formed with a hydrogen ion exchange membrane between the reduction electrode predominantly independent effect bacteria. The method of claim 1, When assembling the microbial fuel cell unit The junction between the oxidation part and the reducing part of the unit and the other unit includes a junction electric reaction part formed with an anode in the direction of the oxidation part and a hydrogen ion exchange membrane between the cathode in the direction of the reducing part. Electroactive bacteria fusion device for treatment. The method of claim 1, Wherein the outlet is formed on the top of the reducing portion of the electro-active bacteria fusion device for electricity production and wastewater, characterized in that configured to be lower than the water level of the oxidation portion. The method of claim 1, An electroactive bacterial fusion device for electricity production and wastewater treatment, characterized in that a plurality of through-holes are formed on the lower surface of the reducing unit. The method of claim 1, And an inclined surface on the lower surface of the oxidation unit, the inclined surface having a downward inclination gradient formed in the flow path direction. The method of claim 1, An electroactive bacterial fusion device for electricity production and wastewater treatment, characterized in that each anode and cathode are electrically connected to a linked inverter. The method of claim 1, The width of the oxidation unit is less than the width of the reduction unit electroactive bacteria fusion device for electricity production and wastewater treatment, characterized in that. The method according to any one of claims 1 to 7, The overflow mouth is an electroactive bacterial fusion device for electricity production and wastewater treatment, characterized in that the built-in activated sludge tank higher than or equal to the water level of the bulk solution.

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