KR0162543B1 - Method of waste water treatment and equipment using thereof - Google Patents

Abstract

[purpose]

The present invention provides a wastewater treatment method and a wastewater treatment apparatus capable of efficiently decomposing hardly decomposable substances within a short time.

[Configuration]

The wastewater treatment apparatus is a wastewater treatment apparatus which decomposes wastewater 1 containing organic pollutants by microorganisms 2, wherein the wastewater treatment apparatus includes three wastewater treatment apparatuses that decompose and treat the wastewater 1 by microorganisms 2 while circulating the wastewater 1. Electrode rods 10 and electrodes 11 disposed in the treatment tanks 3, 4, 5 and their treatment tanks 3, 4, 5, and electrolyzing wastewater 1 to generate bubbles. (12) (13) and the electrode 10 and the rotating means for relatively rotating the electrodes 11, 12, 13, and between the electrode 10 and the electrodes (11) (12) (13) It is characterized by activating the microorganism 2 by the current flowing through the wastewater 1 and adhering the bubbles 18 to the microorganism 2.

Description

Wastewater Treatment Method and Wastewater Treatment Equipment

1 is a block diagram showing an embodiment of the wastewater treatment apparatus of the present invention used in the wastewater treatment method of the present invention.

2 is an explanatory diagram for explaining the behavior of microorganisms in the wastewater treatment apparatus shown in FIG.

3 is a perspective view showing an electrode of the wastewater treatment shown in FIG.

Figure 4 is a block diagram showing another embodiment of the wastewater treatment apparatus of the present invention used in the wastewater treatment method of the present invention.

5 is a configuration diagram showing a configuration of main parts of the wastewater treatment apparatus shown in FIG.

6 to 10 are graphs of the conversion of CODMn30 values with respect to the elapsed processing time of each sample as experimental data of the present invention.

[Industrial use]

The present invention relates to a wastewater treatment method and a wastewater treatment apparatus capable of decomposing hardly degradable organic substances.

[Prior art]

The wastewater treatment method used in the conventional wastewater treatment apparatus was to culture microorganisms in a treatment tank, supply wastewater in the treatment tank, and decompose organic pollutants in the wastewater by the action of the microorganisms in the treatment tank.

In this method, the microorganisms can propagate organic pollutants into the culture source, decompose the organic pollutants in multiple stages, and finally decompose even gases such as carbon dioxide and ethane.

However, rapid advances in science and technology have led to the synthesis of many useful chemicals, the synthesis of many non-natural chemicals, and their release into nature after use.

Organic substances such as animals and plants obtained in nature can be decomposed in a short time in response to the action of microorganisms present in nature or by wastewater treatment technology using such microorganisms even if they are released into wastewater.

In addition, many synthetic compounds can be decomposed by such microorganisms in a relatively short time.

[Problems trying to solve the invention]

Nevertheless, microorganisms, such as methylnaphthalene, isopropyl alcohol, tenaraisofurophylamine, cannot be decomposed in a short time in synthetic materials.

In the case of so-called degradable materials, it is difficult to disintegrate these hardly decomposable substances in a short time by the conventional wastewater treatment method using microorganisms, and microorganisms must decompose the hardly decomposable substances in multiple stages through complex metabolic pathways. For example, it requires a long time before and after 1800 hours, and in reality, there is a problem that waste water cannot be disposed of as insufficient treatment.

An object of the present invention is to provide a wastewater treatment method and a wastewater treatment apparatus for efficiently decomposing and treating a hardly decomposable substance in a short time.

[Means for solving the problem]

The inventors have conducted various studies on the degrading action of microorganisms on hardly degradable materials, and as a result, microorganisms are activated when the microorganisms are placed under a specific environment. Built.

The present invention is based on the above matters. The wastewater treatment method according to claim 1 is a wastewater treatment method in which a wastewater containing organic contaminants is decomposed by microorganisms, while a current flows in the wastewater, The magnetic field is generated to activate the microorganisms in the wastewater by the current and the magnetic field.

The wastewater treatment method according to claim 2 of the present invention is a wastewater treatment method in which wastewater containing organic contaminants is decomposed by microorganisms, the current being flowed through the wastewater, and a magnetic field is generated in the wastewater. The high pressure air is intermittently supplied to activate microorganisms in the wastewater, and at the same time, the current is electrolyzed in the wastewater by the current to create bubbles.

A wastewater treatment apparatus according to claim 3 of the present invention is a wastewater treatment apparatus for decomposing and treating wastewater containing organic contaminants by microorganisms, the wastewater treatment apparatus comprising: at least one treatment tank for decomposing and treating the wastewater by microorganisms while circulating the wastewater; A rotary means disposed in the treatment tank and at the same time electrolyzing the wastewater to generate bubbles to relatively rotate the pair of electrodes and the pair of electrodes, and activate the microorganism by the current flowing through the wastewater between the pair of electrodes. At the same time, the bubble is attached to the microorganism.

Further, the wastewater treatment apparatus according to claim 4 of the present invention is to prepare an air supply means by intermittently supplying high pressure air to the treatment tank in the wastewater in the invention according to claim 3.

[Action]

According to the invention of claim 1, when the wastewater containing organic pollutants is decomposed by the microorganisms, a current flows in the wastewater and a magnetic field is generated in the wastewater, whereby the microorganisms are activated by the current and the magnetic field. Can decompose decomposable organic substances.

According to the present invention as defined in claim 2 of the present invention, the wastewater containing organic pollutants is caused to flow through the current in the wastewater while being decomposed by microorganisms, and a magnetic field is generated in the wastewater to supply the high-pressure air intermittently to the wastewater. At the same time, microorganisms are activated by silver current and magnetic field and at the same time, they stimulate microorganisms by shock wave of high-pressure air, which can be activated to decompose decomposable substances. When bubbles are newly generated by electrolysis of water, these bubbles are surrounded by microorganisms. It is attached to the surface and floats in the waste water, and prevents microorganisms from being distracted and disappears, thus making the decomposition process by microorganisms more efficient.

According to the invention as set forth in claim 3 of the present invention, the wastewater treatment device is supplied with a pair of electrodes in the treatment tank at the time of being decomposed by microorganisms while discharging wastewater containing organic pollutants in one treatment tank. When a pair of electrodes is relatively rotated by the rotating means, a magnetic field is generated in the vicinity of each electrode by energization between the electrodes, and the magnetic field acts on the microorganisms to activate the microorganisms, and simultaneously bubbles such as oxygen on each electrode. Since each electrode is relatively rotating, the air bubbles on the surface of the electrode fall into the waste water as fine and block the flow of the waste water, so that the air bubbles float between them. The disintegration treatment by the microorganisms can be efficiently performed by preventing the scattering.

According to the invention as set forth in claim 4 of the present invention, according to the invention as set forth in claim 3, an air supply means must be prepared by intermittently supplying air to the treatment tank in the wastewater to give microorganisms in the wastewater by air pressure to stimulate the microorganisms. At the same time, the dissolution of oxygen in the waste water can be promoted to promote the decomposition treatment of microorganisms.

EXAMPLE

Hereinafter, the present invention will be described based on the embodiments indicated in FIGS. 1 to 5. 1 is a block diagram showing an embodiment of the wastewater treatment apparatus of the present invention which acted on the wastewater treatment method of the present invention, and FIG. 2 illustrates the behavior of microorganisms in the wastewater treatment apparatus shown in FIG. Explanatory drawing to make. 3 is a view showing an electrode of the wastewater treatment apparatus shown in FIG. Figure 4 is a block diagram showing another embodiment of the wastewater treatment apparatus of the present invention that acted on the wastewater treatment method of the present invention. FIG. 5 is a configuration diagram showing a configuration of main parts of the wastewater treatment apparatus shown in FIG. 4.

Example 1

In the wastewater treatment apparatus of the present embodiment, as shown in FIG. 1, the wastewater 1 containing organic contaminants is decomposed by microorganisms 2, and three treatment tanks 3, 4, and 5 are disposed in the upward direction. Three stacks are stacked and each treatment tank is connected to each other.

3 A of bottom surfaces of the processing tank 3 of an upper end are inclined gentle incline toward the center from the periphery, and are formed in the cone shape, and the opening part is formed in the center.

Further, the bottom surfaces 4A and 5A of the middle and lower treatment tanks 4 and 5 are formed like the upper treatment tank 3, respectively, so that the upper surfaces 4B and 5B are gentle toward the center from the surroundings, respectively. It is raised and inclined so that it may be formed in the cone shape, and the opening part is formed in each center.

Examples of the organic pollutants include substances that are easily decomposed by the microorganism 2 and difficult-to-dissolve substances such as methylnaphthalene, isopropyl alcohol, and tenaraisoprophylamine that are difficult to decompose by the microorganism 2.

Microorganisms 2 are also aerobic and anaerobic or intermediates thereof.

In this embodiment, an aerobic microorganism acted on a general activated sludge process was used.

Therefore, the processing tank 3 of the upper end and the processing tank 4 of the interruption are each connected by the cylinder 6 in an opening part, and the processing tank 4 of the main end and the processing tank 5 of a lower end are each cylinder in an opening part. It is connected by (7), and the three processing tanks (3) (4) (5) are integrated.

Moreover, the cylinder 8 is connected to the opening part of the bottom surface 5A of the lower process tank 5, and the discharge pipe 9 extended to the liquid level of the process tank 3 of the upper end is connected to this cylinder 8. .

The shaft centers of these treatment tanks (3) (4) (5) and cylinders (6) (7) (8) coincide with each other.

Further, the magnetized electrode rods 10 penetrating through the shaft core are disposed in the processing tanks 3, 4, and 5 which are further integrated, and the electrode rods 10 are provided on the inner surfaces of the respective cylinders 6, 7, and 8. ) Is equipped with a conventional magnetized electrode (11) (12) (13).

The electrode 10 and each of the electrodes 11, 12, 13 are connected to a power source 15 via a wiring 14, and the electrode 10 and the electrodes 11 ( 12) A voltage of, for example, 5 to 40 V is applied between (13) and a weak current, for example, 40 to 80 mA, flows through the wastewater 1 in the treatment tanks 3, 4, and 5. It is.

Further, a rotation means such as a motor is connected to the electrode rod 10 so that the electrode rod 10 rotates in the waste water 1 in the direction of arrow A in FIG. 1 by driving the rotation means.

In addition, the upper processing tank 3 and the lower processing tank 5 are connected by the piping 16, and the 3 and the processing tank 5 are communicated through this piping 16. As shown in FIG. Moreover, the pump 17 is arrange | positioned at this piping 16, and the wastewater 1 supplied to the processing tank 3 by the drive of this pump 17 is piping through the processing tank 4,5. In 16, it circulates to the process tank 3. As shown in FIG.

The microorganism 2 acts on the organic contaminants in the wastewater 1 to be decomposed while the wastewater 1 repeatedly circulates through the treatment tanks 3, 4, and 5. Finally, carbon dioxide and ethane are treated. It is decomposed to gas such as to purify the wastewater 1, and the purified water is drained through the discharge pipe 9.

After the drainage, the wastewater 1 is automatically supplied to the treatment tank 3, and the wastewater 1 always ensures a certain amount.

Next, an embodiment of the wastewater treatment method of the present invention using the wastewater treatment apparatus of the above embodiment will be described together with the operation of the wastewater treatment apparatus. First, the wastewater 1 is supplied into the treatment tanks 3, 4, and 5, and the microorganisms 2 are turbid in the treatment tanks 3, 4, and 5 by the wastewater 1.

Then, the pH of the wastewater 1 is adjusted in advance to 7-9.5, and the electrode 10 is rotated by the rotating means while the electrode 10 is rotated between the electrodes 10, 11, 12, and 13 by the rotating means. A voltage of 30 V is applied to allow a weak current of 40-80 mA to flow between the electrodes. At the same time, the pump 17 is driven to gently circulate the wastewater 1 through the pipe 15 in the treatment tanks 3, 4, and 5. Create a down stream of wastewater (1). As a result, the microorganism 2 flows below each of the treatment tanks 3, 4, and 5 as shown by arrows in FIG. 2, or ascends with the bubbles 18 as much as described later.

That is, oxygen gas is produced | generated in the electrode rod 10 of the + side by the above-mentioned electric current, and hydrogen gas is produced | generated in the electrodes 11, 12, 13 of the-side. Each electrode gradually grows in gas to generate bubbles 18. At this time, since the electrode 10 rotates, the bubbles 18 attached to the electrode 10 are finely formed by the rotation of the electrode 10. 10) floats away from the wastewater and adheres to the surface of the microorganism (2). As the amount of adhesion of the bubbles 18 to the microorganisms 2 increases, buoyancy is applied to the microorganisms 2 so that the microorganisms 2 resist the downward flow of the wastewater 1 and rise as indicated by arrow C in FIG.

Therefore, in the treatment tanks 3, 4, and 5, the bubble 18 suppresses the flow to the downstream side of the microorganism 2 while the waste water 1 circulates, and at the same time, each treatment tank 3 (4). The microorganism 2 can be concentrated in the reverse flow in (5), and the microorganism 2 can be efficiently used for the decomposition treatment of organic pollutants.

In addition, even if the microorganism 2 flows downstream in each treatment tank 3, 4, and 5, the microorganism 2 is returned to each treatment tank 3, 4, 5 through the pipe 9. There is a number.

On the other hand, since a voltage is applied between the magnetized electrode rod 10 and the magnetized electrodes 11, 12, 13 during the process, a magnetic field is formed around each electrode, and the magnetic field flows between the electrodes. It is applied to microorganism (2) with electric current to activate microorganism (2), inhibit the selectivity of microorganism (2) to selectively decompose organic pollutants which are easy to decompose, and to decompose hardly decomposable substances to microorganism (2). The microorganism 2 can be purified and cultured as a microorganism 2 resistant to the degradation of such a hardly decomposable substance, and the activity of the microorganism 2 can be enhanced.

This is considered to be a phenomenon that occurs because the microorganism 2 is stimulated by the action of an electric current and a magnetic field, and the respiratory and metabolic properties become active. Therefore, this phenomenon and the purified culture increase the transport function of substances between the cells of the microorganism 2 and the outside of the cells, and the hardly decomposable substances are adhered to the cells as nutrients at a rate comparable to organic contaminants other than this, Hardly decomposable substances can be decomposed quickly and in a short time.

The microorganisms 2 thus activated are actuated by the bubbles 18 to float in the respective treatment tanks 3, 4, and 5. In combination with dissolved oxygen in 18), microorganisms (2) can decompose organic contaminants that are easy to decompose and decompose hardly decomposable substances in a short time, like other easily decomposable organic contaminants, and require chemical oxygen demand. In this COD = 30 wastewater 1, it can be decomposed by the microorganism 2 in the present embodiment.

In this case, the decomposition recipe rate of the hardly decomposable substance reaches 99%, and the decomposition recipe rate is greatly improved in this embodiment as compared with the conventional treatment method having been around 20%.

In addition, microorganisms 2 grow by digestion of organic pollutants and dissolution of oxygen gas. Here, when the microorganism 2 further increases the decomposition treatment capacity of the hardly decomposable substance, the object can be achieved by attaching the microorganism 2 to the carrier.

As described above, according to the wastewater treatment method of this embodiment using the embodiment apparatus, a voltage is applied between the electrodes 11, 12, 13, and the electrode 10 of each treatment tank 3, 4, and 5. The current flows between the electrode rod 10 and the electrodes 11, 12, and 13, and when a magnetic field is generated in the wastewater 1 near each electrode, the microorganisms in the wastewater 1 are generated by this current and the magnetic field. By activating (2), the transport function of the substance is increased between the cells of the microorganism (2) and the extracellular substance, so that it is possible to quickly decompose the hardly decomposable substance in a short time, and the decomposition method of the hardly decomposable substance is 99. Reaches% Therefore, this decomposition preparation rate is greatly improved in this embodiment, compared with that in which the hardly decomposable substance in the wastewater treatment method using the conventional treatment apparatus was around 20%. Therefore, according to this embodiment, the installation volume of the wastewater treatment apparatus can be reduced at each end, and the installation area can be, for example, 1/10 or less of the conventional installation volume.

Example 2

The wastewater treatment apparatus 20 of this embodiment is connected to the side wall of the storage tank 21 storing the wastewater 1 as shown in FIG. 4 via a pipe 22. A pump 23 is disposed on an upstream side of the pipe 22, and the wastewater 1 circulates between the wastewater treatment device 20 and the storage tank 21 by the pump, and the wastewater treatment device therebetween. It is comprised so that the organic pollutant may be decomposed | disassembled by the microorganism 2 of (20).

The storage tank 21 is provided with a discharge pipe 24 at a position different from the side wall on which the waste water treatment device 20 is installed, and the waste water treatment device 20 is configured to drain the treated water from the discharge pipe 24.

Here, the wastewater treatment apparatus 20 of the present embodiment will be described in detail with reference to FIG. In the wastewater treatment apparatus 20 according to the present embodiment, two tubular treatment tanks 201 and 202 are stacked and stacked in the vertical direction at the horizontal length as shown in FIG. 5. Piping portions 201A and 202B are formed on the left and right sides of the lower treatment tank 201 in the vertical direction, respectively, and the upper and lower sides of the upper and lower treatment tanks 202 have the same shape. Piping portions 201A and 202B are formed toward the surface. Therefore, piping sections 201A and 202B are formed in the upper and lower processing tanks 201 and 202, respectively. Thus, the upper and lower processing tanks 201 and 202 are respectively connected by flanges via the electrodes 203 serving as connection pipes in the pipe portions 201A and 202B, respectively. Further, lids 201C and 201C are joined to both ends of the lower treatment tank 201 by bolts, and the inside of the treatment tank 201 is sealed by these lids 201C and 201C.

In addition, the electrode 204 penetrates the center of the lid 201C through the sealing member 205 in the processing tank 201, and the electrode 204 is configured to be rotatable by a rotating means not shown in the drawing. It is.

The outer circumference of this processing tank 201 and the outer circumference of both ends of the electrode rod 204 are surrounded by coils 206A and 206B, and these coils 206A and 206B are alternately connected by wiring 207. It is integrated. One end of one coil 206B is connected to one side of the power supply, one end of the other coil 206B is connected to one side of the power supply, and one end of the other coil 206B is connected to the left side of the electrode rod 204. Connected.

In addition, the + side of the power supply is connected to the electrode 203 between the treatment tanks 201 and 202, and a weak current flows between the electrode rod 204 through the wastewater 1 in the treatment tank 201. The magnetic field is formed inside the coils 206A and 206B, that is, in the processing tank 201.

Moreover, the upper process tank 202 also has the electrode rod 208, the seal member 209, the coil 210A (202B), and the wiring 211, and is comprised in the same shape as the said process tank 201.

The electrode rod 204 is formed with an air passage 204A reaching the inside of the treatment tank 201 at the right end thereof through the shaft center, and the air passage 204A is disposed in the treatment tank 201 toward the direction perpendicular to the shaft center. Pierced The air pipe 212 is connected to the hole of the shaft end of this air passage 204A, maintaining airtightness. A high-pressure air source (not shown) is connected to the air pipe 212. Furthermore, the solenoid valve 213 and the valve 214 are disposed in the air pipe 212 sequentially from the downstream side to the upstream side. By intermittently opening the solenoid valve 213 in the state which adjusted the opening degree of 214, the high pressure air of a high pressure air source is supplied intermittently to the wastewater 1 in the processing tank 201, and the wastewater 1 It is comprised as if a shock wave of air is given to microorganisms (not shown). Although not shown in the figure, an air passage of the same shape is formed in the electrode rod 208 of the treatment tank 202, and a shock wave of high pressure air is applied to the microorganisms in the treatment tank 202.

Next, an embodiment of the wastewater treatment method of the present invention using the wastewater treatment apparatus of the above embodiment will be described together with the operation of the wastewater treatment apparatus. First, the wastewater 1 is supplied into the treatment tank 201 and the microorganisms in each treatment tank 201 and 202 are made turbid by the wastewater 1. Then, the pH of the wastewater 1 is adjusted to 7-9.5 in advance, and the electrode 203 and the coil 206A (for example, a voltage of 5-40 V are supplied from the power supply while the electrode 204 is rotated by the rotating means). When applied to 206B, this voltage eventually causes a weak current of 40-80 mM to flow through the wastewater 1 due to the voltage between the electrode 204 and the electrode 204. At this time, when the pump 23 is driven, the wastewater 1 in the storage tank 21 is circulated between the storage tank 21 and the treatment tank 201, 202, and the wastewater 1 is treated in the treatment tank 201. It flows slowly from the processing tank 202 to the side.

The same phenomenon as the treatment tank 201 also occurs with this reprocessing tank 202.

On the other hand, a magnetic field is generated in the processing tanks 201 and 202 by the current flowing through the coils 206A, 206B, 210A, and 210B, and the magnetic field and the weak current in the wastewater 1 match with each other. As in the case of 1, the microorganisms in the treatment tanks 201 and 202 are activated to decompose the organic pollutants including the hardly decomposable substance in the wastewater 1 as in the case of the first embodiment.

At this time, when the solenoid valve 213 is intermittently opened and closed and the high-pressure air is intermittently supplied into the treatment tank 201 through the valve 214, the air pipe 212, and the air passage 204A whose opening degree is adjusted, this air is It is possible to dissolve oxygen in the wastewater 1 while activating microorganisms while giving shock waves of air from the air passage 204A to the treatment tank 201, enhancing its metabolic function.

As described above, according to the wastewater treatment method of the present embodiment using the above-described device, a voltage is applied between the electrodes 204 and 208 and the electrode 203, and the electrodes 204 and 208 and the electrode 203 are applied. When a current flows between them, and a magnetic field is generated in the wastewater 1 of each treatment tank 201 and 202, the microorganisms in the wastewater 1 are activated by this current and the magnetic field, and an intermittent shock wave of high pressure air is further generated. The microorganism is activated by this, and the transport function (metabolism function) of the substance between the intracellular and the extracellular substance of the organism is increased, and the hardly decomposable substance adheres into the cell at a speed comparable to other organic contaminants. Can be decomposed quickly in a short time. In addition, also in this embodiment, the effect similar to Example 1 can be abbreviated.

Furthermore, the present invention is not equally limited to the above embodiments, and if the technology is included in the gist of the present invention that the microorganisms in the wastewater are activated by the electric current and the magnetic field, even if each component of the present invention is appropriately modified in design. It is included in the present invention.

6 to 10 show the change and graph of the CODMn value with respect to the elapsed time of treatment of each sample as described above. Each plot of the conversion of 30 CODMn values to the elapsed time of treatment of the sample is presented as experimental data.

[Experiment 1]

Analysis of the experimental data as a graph according to FIG. 6 shows that in the MNS treatment by the malleable activated sludge method, the rate of decomposition of CODMn components of general aerobic microorganisms is 93D * 24Hr = 2232Hr, and the rate of degradation of malleable active sludge is 7D * 24Hr = 168Hr, which is about 1 / 13.2.

[Experiment 2]

Analysis of these experimental data as a graph according to FIG. 7 shows that in the MNS treatment by the malleable activated sludge method, the rate of decomposition of CODMn components of general aerobic microorganisms is 48D * 24Hr = 1152Hr, and the rate of degradation of malleable activated sludge is 5D * 24Hr = 120Hr, about 1 / 9.6.

[Experiment 3]

Analysis of these experimental data as a graph according to FIG. 8 shows that in the MNS treatment by the malleable activated sludge method, the rate of decomposition of CODMn components of general aerobic microorganisms is 28D * 24Hr = 672Hr, and the rate of degradation of malleable activated sludge is 5D * 24Hr = 120Hr, about 1 / 5.6.

[Experiment 4]

Analysis of these experimental data as a graph according to FIG. 9 shows that in the MNS treatment by the malleable activated sludge method, the rate of decomposition of CODMn components of general aerobic microorganisms is 68D * 24Hr = 1632Hr, and the rate of degradation of malleable activated sludge is 7D * 24Hr = 168Hr which is about 1 / 9.77.

[Experiment 5]

Analysis of these experimental data as a graph according to FIG. 10 shows that in the MNS treatment by the malleable activated sludge method, the rate of decomposition of CODMn components of general aerobic microorganisms is 6D * 24Hr = 144Hr, and the rate of degradation of malleable activated sludge is 2D * 24Hr = 48Hr, about 1/3.

[Effects of the Invention]

According to invention of Claim 1 and Claim 2 of this invention, the wastewater treatment method and wastewater treatment apparatus which can disintegrate hardly decomposable substance in a short time efficiently can be provided.

In addition, according to the inventions described in Claims 3 and 4 of the present invention, it is possible to provide a wastewater treatment apparatus capable of efficiently treating a hardly decomposable substance in a short time.

Claims (4)

A wastewater treatment method for decomposing and treating wastewater containing organic contaminants by microorganisms, wherein a current flows in the wastewater and a magnetic field is generated in the wastewater, and the microorganisms in the wastewater are activated by the current and the magnetic field. Wastewater treatment method characterized in that. A wastewater treatment method in which wastewater containing organic pollutants is decomposed by microorganisms, the current flowing through the wastewater, a magnetic field in the wastewater, and an intermittent supply of high-pressure air into the wastewater. A method for treating wastewater, comprising activating microorganisms and creating air bubbles by electrolyzing water in wastewater by the current. A wastewater treatment method in which wastewater containing organic pollutants is decomposed by microorganisms, the wastewater treatment method comprising: at least one treatment tank for distributing the wastewater and decomposing the wastewater with microorganisms; And a pair of electrodes for generating bubbles, and a rotation means for relatively rotating the pair of electrodes, wherein the bubbles are attached to the microorganisms while activating the microorganisms by a current flowing through the wastewater between the pair of electrodes. Wastewater treatment device characterized in that. The wastewater treatment apparatus according to claim 3, wherein air supply means for intermittently supplying high pressure air to the wastewater is provided.