JP3101490B2 - Purification device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a purification apparatus in which a diffuser is disposed at the bottom of a purification chamber, and a filtration membrane device is provided above the diffuser.

[0002]

2. Description of the Related Art As the purifying device, for example, a device in which a plurality of square plate-shaped flat membrane filter devices are arranged in an upright position above an air diffuser in the purifying chamber is used. I was

[0003]

However, since the outer shape of the flat membrane type filtration membrane device cannot usually be changed, the shape of a combination of a plurality of the filtration membrane devices is set in advance in the plan view. Unless it is adapted to the shape of the purification chamber in a plan view (it is necessary to perform the adaptation for each size of the purification device and it is difficult), the filtration membrane device can be densely filled in the purification chamber. However, the low filling area ratio has been a problem. The present invention has been made in view of such a situation, and an object thereof is to provide means capable of solving the problem of the low filling area ratio of the filtration membrane device in the conventional device described above.

[0004]

The purifying apparatus according to the present invention (hereinafter referred to as the apparatus of the present invention) is characterized in that an air diffuser is disposed at the bottom of a purifying chamber, and a filtration membrane device is provided above the air diffuser. A purifier, above the air diffuser,
A flat membrane type filtration membrane device which constitutes a part of the filtration membrane device is installed, and the flat membrane type filtration membrane device is provided in a room in a blank space in plan view in the purification chamber. The point is that the hollow membrane type filtration membrane device constituting the remainder is provided in a suspended state.

[0005]

According to the apparatus of the present invention having the above-mentioned characteristic structure, first, a plurality of the flat membrane type filtration membrane devices are installed above the air diffuser in the purification chamber in the same manner as the conventional device. The filling area ratio of the filtration membrane device to the purification chamber
For the time being, it can be increased to the same level as the filling area ratio in the conventional apparatus. In addition, according to the apparatus of the present invention having the above-mentioned characteristic configuration, the flat membrane type filtration membrane device is provided in the interior of the purification chamber in which the outer shape changes relatively freely in a blank portion in plan view. Since the air filter device is provided in a suspended state, the hollow filter device is additionally accommodated in the blank portion in addition to the flat filter device.

[0006]

Thus, according to the apparatus of the present invention having the above-mentioned characteristic structure, the filtration membrane apparatus including both the flat membrane filtration membrane apparatus and the hollow membrane filtration membrane apparatus can be installed in the purification chamber. The filling area ratio is improved compared to the conventional equipment,
Thus, the problem of the low filling area ratio of the conventional filtration membrane device can be solved. In addition, the hollow membrane type filtration membrane device enters and exits the purification chamber via a manhole or the like formed at the top of the purification chamber, and the workability at the time of entry and exit is as described above. There is also a merit that the filter is improved by the ease of deformation of the hollow membrane filter device. Further, since the hollow membrane type filtration membrane device is located above the air diffusion tube, the hollow membrane type filtration membrane device swings due to the air diffused from the air diffusion tube. As a result, since the water to be treated is stirred, there is also an advantage that the efficiency of dissolving oxygen supplied into the purification chamber from the diffuser tube into the water to be treated is improved.

Further, in the apparatus of the present invention having the above-mentioned characteristic configuration, if the flat membrane type filtration membrane apparatus and the hollow membrane type filtration membrane apparatus are alternately arranged in a plan view, the dispersion can be reduced. The hollow membrane type filtration membrane device swings by the air diffused from the trachea, and based on the swing, the hollow membrane type filtration membrane device comes into contact with the flat membrane type filtration membrane device. By the swinging and contacting, the deposits on the flat membrane type filtration membrane device are wiped off, and the clogging is eliminated. Therefore, the apparatus of the present invention having the above-mentioned features can be applied to water treatment under relatively severe contamination.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show a septic tank in which the first embodiment of the apparatus of the present invention is partially incorporated.

As shown in FIG. 1, the clarification tank comprises an anaerobic filter bed first chamber N1 and an anaerobic filter tank second chamber N2 from the upstream side.
Anaerobic filter bed tank N, contact aeration tank first chamber E1 and contact aeration tank second chamber E2, contact aeration tank E, sedimentation tank P, and disinfecting tank S. It is constituted by being provided so as to flow.

The anaerobic filter bed first chamber N1 and the anaerobic filter tank second chamber N2 grow anaerobic microorganisms that anaerobically decompose organic substances in the water to be treated and filter them to fix their biofilms. Floors F1 and F2 are individually provided. The first and second contact aeration tank first chamber E1 and the first contact aeration tank second chamber E2 are used to fix first and second aerobic microorganisms that decompose remaining organic substances in the water to be treated and perform nitrification reaction of ammonia nitrogen. Two contact materials C1 and C2 are individually provided. Further, the contact aeration tank first chamber E1 and the contact aeration tank second chamber E
2, a circulating flow of the water to be treated is generated in each room, and the water to be treated containing an organic substance is brought into good contact with the aerobic microorganisms fixed on the first and second contact materials C1 and C2, and Aeration tubes D1 and D2 for supplying air for providing necessary oxygen to the aerobic microorganisms are also provided.

Downstream of the contact aeration tank second chamber E2, there is provided a settling tank P which communicates with the lower part of the second chamber E2, that is, the purification chamber 1 of the apparatus of the present invention. At the bottom of the purification chamber 1, aerobic microorganisms that enter the purification chamber 1 from the contact aeration tank first chamber E1 and the contact aeration tank second chamber E2 and also contribute to the purification of the water to be treated are provided. A diffuser pipe for supplying air to the purifying chamber 1 in order to supply necessary oxygen and to eliminate clogging of the flat membrane type filtration membrane device 3 disposed in the purifying chamber 1 as described later. 2 are arranged. And
A filtration membrane device G for performing filtration for further purifying the water to be treated, which has been considerably purified by the anaerobic filter bed tank N and the contact aeration tank E, is provided above the air diffuser 2. I have. In the purification chamber 1, as shown in FIGS. 2 and 3, a flat membrane constituting a part of the filtration membrane device G is provided at a central portion in plan view and above the air diffuser tube 2. A type filtration membrane device 3 is installed. In the plate-type membrane separation device 3, a plurality of plate-shaped filtration membranes are arranged in parallel, and the parallel state is fixed and integrated. Further, in the blank portion in plan view (around the central portion) in the purification chamber 1 in which the flat membrane type filtration membrane device 3 is provided indoors,
A hollow membrane type filtration membrane device 4 constituting the remaining portion of the filtration membrane device G is provided in a suspended state. In the hollow membrane type filtration membrane device 4, both ends of a large number of hollow membranes 4a are attached to an upper fixing member 4b, and an intermediate portion of each hollow membrane 4a is simply hung. .

Downstream of the sedimentation tank P, a disinfection tank S for receiving the liquid treated by the filtration membrane device G is provided. At the entrance of the disinfection tank S, there is a cartridge T containing a solid disinfectant.
A plurality of slit-shaped openings for inflow and outflow of the water to be treated are formed in the lower part of the medicine cartridge T. Medicine cartridge T
The water to be treated, which has come into contact with the disinfectant therein, passes under a baffle provided in the middle of the disinfection tank S, overflows and is discharged. In the first chamber E1 of the contact aeration tank, an air lift pipe A is raised from the bottom in order to return stripped sludge, nitrification liquid and the like to the first chamber N1 of the anaerobic filter bed tank.
, And an intermittent air control device for intermittently supplying air to the air lift tube A and a blower to constitute a return means M.

Next, another embodiment will be described. In the drawings showing another embodiment, the portions indicated by the same reference numerals as those in the first embodiment indicate the same or corresponding portions. The apparatus of the present invention can be applied to a septic tank as in the above-described embodiment, and can also be applied to various water treatment apparatuses such as an apparatus for treating other general sewage. For example, as shown in FIGS. 4 and 5, an air diffuser 2 is disposed at the bottom of an independent purification chamber 1 having a circular planar shape by the activated sludge treatment method, and above the air diffuser 2 and A flat membrane type filtration membrane device 3 which constitutes a part of the filtration membrane device G is installed at a central portion of the purification chamber 1 in plan view (that is, the circular central square portion). A second embodiment in which a hollow membrane type filtration membrane device 4 constituting the remainder of the filtration membrane device G is provided in a suspended state in a visually blank portion (that is, a portion excluding the central square portion) is also considered. Can be

As shown in FIGS. 6 and 7, an air diffuser 2 is disposed at the bottom of an independent purification chamber 1 having a square planar shape, and a flat membrane type filtration membrane is provided above the air diffuser 2. A third embodiment in which the apparatus 3 and the hollow membrane type filtration membrane apparatus 4 are arranged alternately in a plan view is also conceivable. In the third embodiment, the flat membrane type filtration membrane devices 3 and the hollow membrane type filtration membrane devices 4 are alternately arranged in a plan view. The air filtration type membrane device 4 swings, and based on the oscillation, the hollow membrane type filtration membrane device 4 comes into contact with the flat membrane type filtration membrane device 3. The deposits on the membrane-type filtration membrane device 3 are removed and the clogging is eliminated.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the accompanying drawings.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a septic tank provided in a part of a first embodiment of the apparatus of the present invention.

FIG. 2 is a horizontal sectional view showing a main part thereof.

FIG. 3 is a cross-sectional view showing the main part.

FIG. 4 is a horizontal sectional view showing a second embodiment of the apparatus of the present invention.

FIG. 5 is a longitudinal sectional view thereof.

FIG. 6 is a horizontal sectional view showing a third embodiment of the apparatus of the present invention.

FIG. 7 is a longitudinal sectional view thereof.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Purification room 2 Aeration tube 3 Flat membrane type filtration membrane device 4 Hollow membrane type filtration membrane device G Filtration membrane device

Continuing from the front page (72) Inventor Masaharu Iwahashi 2 at Takamatsu, Kosai-cho, Koga-gun, Shiga Prefecture Inside the Kubota Shiga Plant (72) Katsumi Hamada, 2nd Takamatsu, Kosai-cho, Koga-gun, Shiga Prefecture Kubota Shiga Plant (56) References JP-A-5-220358 (JP, A) JP-A-6-254582 (JP, A) JP-A-2-268892 (JP, A) JP-A-7-289859 (JP) , A) (58) Field surveyed (Int. Cl. ⁷ , DB name) B01D 63/00-63/16 C02F 1/44 C02F 3/12

Claims (2)

(57) [Claims] 1. A purifying apparatus comprising: a diffuser (2) disposed at the bottom of a purifying chamber (1); and a filtration membrane device (G) provided above the diffuser (2). Above the trachea (2), a flat membrane filtration device (3) constituting a part of the filtration membrane device (G) was installed, and the flat membrane filtration device (3) was provided indoors. A purifying apparatus in which a hollow membrane type filtration membrane device (4) constituting the remainder of the filtration membrane device (G) is provided in a suspended state in a blank portion in plan view of the purification chamber (1). 2. The purification device according to claim 1, wherein the flat membrane type filtration membrane devices (3) and the hollow membrane type filtration membrane devices (4) are alternately arranged in a plan view.