JPH0646555Y2 - Bacteria retention device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a device for holding bacterial cells that are not desired to flow out or inflow.

<Prior Art> Generally, as a water pollution prevention device, a biochemical treatment device that decomposes water to be treated (air quality) by using microorganisms (bacteria) is known. In such a biochemical treatment device, treated water such as sewage is mixed with a liquid in which cells decomposing it are suspended, the treated water is decomposed, and the decomposed treated water is discharged. Was being done.

<Problems to be solved by the invention> However, in such a biochemical treatment apparatus, when releasing the decomposed water to be treated, the bacterial cells may be released at the same time. Therefore, although the water to be treated is discharged, it has been desired that the bacterial cells be retained in the biochemical treatment device.

On the contrary, when a red tide or the like occurs in the sea or a lake, for example, the microorganisms (mycelia) that make up the red tide are prevented from entering the inside of live mosquitoes installed in the water. It is desirable to prevent and keep it outside of the poultry.

An object of the present invention is to provide a device for holding bacterial cells, which prevents bacterial cells from flowing in and out.

<Means for Solving the Problems> The present invention achieves the above object by focusing on the fact that bacterial cells generally have a negative charge. I have it. The conductor is provided in a state in which the first liquid in which the bacterial cells are suspended and the second liquid in which the bacterial cells are not suspended are separated from each other and are spaced from each other. . The DC power source has a negative electrode connected to the first liquid-side conductor and a positive electrode connected to the second liquid-side conductor.

As the conductor, a metal vapor deposition film or a wire net can be used.

<Operation> According to this invention, the negative electrode of the DC power supply is connected to the first liquid-side conductor, and the positive electrode is connected to the second liquid-side conductor. Therefore, a negative charge exists in the first liquid-side conductor. And since the bacterial cells floating in the first liquid have a negative charge as described above, they are repelled by the negative charge of the electrode on the side of the first conductor, and are transferred to the side of the second liquid. Does not move. That is, it is held on the first liquid side.

<Example> The first example is shown in FIG. In this embodiment, the invention is applied to the aeration tank 2. This aeration tank 2
A polymer film 4 is provided in the center of the so as to divide the aeration tank 2 into two chambers 2a and 2b. The water to be treated (temperament) is supplied to the room 2a through the pipe 6. 8 is a fan for stirring the water to be treated.

Further, in the room 2b, cells that decompose the water to be treated, for example, a liquid in which aerobic cells are suspended are stored. 10 is an air supply device for aeration of this liquid.

The polymer film 4 has a thickness of 1 mm, for example, and is used in the room 2
It is configured such that the water to be treated in a can pass to the room 2b side and the liquid in the room 2b side can pass to the room 2a side.

A metal vapor deposition film 12 is formed on the surface of the polymer film 4 on the room 2a side. Similarly, a metal vapor deposition film 14 is formed on the surface of the polymer film 4 on the room 2b side. Both of these metal vapor deposition films 12 and 14 have a thickness of a thin ohm-strong unit so that the water to be treated on the room 2a side can pass to the room 2b side and the liquid on the room 2b side. Are vapor-deposited so that they can pass to the room 2a side.

Both of these metal vapor deposition films 12 and 14 are connected to a DC power source 16, the positive electrode of the DC power source 16 is connected to the metal vapor deposition film 12 side, and the negative electrode of the DC power source 16 is connected to the metal vapor deposition film 14 side. It is connected. Then, the voltage of the DC power supply 16 is set to a voltage such that electrolysis does not occur between the water to be treated in the room 2a and the liquid in the room 2b according to the interval between the metal vapor deposition films 12 and 14. There is.

In the bacterial cell holding device configured as described above, the quality of the water to be treated supplied from the pipe 6 to the room 2a is the metal vapor deposition film 12,
The room 2b is reached via the polymer film 4 and the metal vapor deposition film 14. In the liquid in the room 2b, a large number of bacterial cells are present as indicated by reference numeral 18, which receive aeration from the air supply device 10 to decompose the water to be treated and to treat it with a low air quality concentration. Use water. On the other hand, the bacterial cells 18 also grow due to this decomposition. The treated water having a low air quality is passed through the metal vapor deposition film 14, the polymer film 4, and the metal vapor deposition film 12, returns to the room 2a, and is discharged through the pipe 20.

On the other hand, the bacteria 18 in the room 2b also try to move to the side of the room 2a, but since the metal vapor deposition film 14 is connected to the negative electrode of the DC power supply 16, the metal vapor deposition film 14 has a structure shown in FIG. As shown in, negative charges are accumulated. Therefore, when the bacterial cells 18 try to move to the room 2a side and approach the metal deposition film 14, the bacterial cells 18
The negative charge possessed by and the negative charge of the metal vapor deposition film 14 repel each other, and the bacterial cells 18 return to the room 2b side. That is, the fungus body 18 is in the room 2b.
Held on the side.

The second embodiment is shown in FIG. This embodiment is different from the first embodiment in that wire meshes 22 and 24 are used instead of the polymer film 4 and the metal vapor deposition films 12 and 14. These wire nets 22 and 24 are arranged at a predetermined interval as apparent from FIG. The meshes of these wire nets 22 and 24 are such that liquids can flow between the chambers 2a and 2b. In addition, the water to be treated is supplied to the room 2b through the pipe 25, where it is decomposed into treated water having a low air quality by the bacterial cells 18, moved to the room 2a side through the wire nets 22 and 24, and from the pipe 30. The point of discharge is also different from that of the first embodiment. But wire mesh
Similar to the first embodiment, each fungus body 18 is repelled by the negative charge accumulated in the wire net 22 by the negative electrode of the DC power supply 16 being connected to 22 and held in the room 2b. Is.

A third embodiment is shown in FIG. This embodiment is one in which the present invention is applied to, for example, a live fish provided in the sea, and for example, a wire netting 26 is formed in an annular shape so as to accommodate fish to be cultivated, and the wire netting 26 is separated outside so as to surround the wire netting 26. The wire net 28 is formed in an annular shape, and the DC power source 32 is provided between the wire nets 26, 28. The DC power source 32 connects the positive electrode to the inner wire mesh 26,
A negative electrode is connected to the outer wire mesh 28. The voltage is set so that seawater does not cause electrolysis. Therefore, when red tide cells having a negative charge approach the wire net 28, they are repelled by the negative charge of the wire net 28,
Can not flow inside 26. That is, it is held outside the wire net 28.

In the first and second embodiments, the device for holding bacterial cells according to the present invention is provided in the aeration tank 2. However, a liquid in which bacterial cells having a negative charge are suspended is housed inside. The storage device for the bacterial cells according to the present invention can be provided also in a stored water tank or the like. Further, in the first and second embodiments, aerobic microbial cells are used, but anaerobic microbial cells may be used as long as they have negative charges.

<Effect of Device> As described above, according to the device for self-holding of bacterial cells according to the present invention, a negative charge is supplied to the conductor facing the liquid in which the bacterial cells are floating, so that a negative charge is applied. Since the living cells are repelled by the negative charge of the conductor, the cells can be held at the position of the conductor. Therefore, the inflow and outflow of bacterial cells can be prevented by implementing the bacterial cell holding device according to the present invention in a place where the bacterial cells are not desired to flow out or where the inflow of bacterial cells is desired to be blocked.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a schematic configuration of a first embodiment of a bacterial cell holding device according to the present invention, FIG. 2 is a vertical sectional view of a schematic configuration of a second embodiment, and FIG. 3 is a third embodiment. It is a top view of the schematic structure of an example. 12,14 …… Metal evaporated film (conductor), 22,24,26,28 ……
Wire mesh (conductor), 16, 32 ... DC power supply.

Claims (3)

[Scope of utility model registration request] 1. Two conductors arranged in a state in which a first liquid in which cells are suspended and a second liquid in which cells are not suspended are arranged and spaced from each other. , Of these conductors, the negative electrode is connected to the second conductor on the first liquid side,
And a DC power source in which the positive electrode is connected to the liquid side of the cell holding device. 2. The bacterial cell holding device according to claim 1, wherein both the conductors are metal vapor deposition films. 3. The bacterial cell holding device according to claim 1, wherein both of the conductors are wire nets.