JPH08973Y2 - Membrane-embedded microbial treatment or solid-liquid separation device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention provides a large number of tubular filtration membranes arranged side by side, with the inlet and outlet of the filtration membranes open at the top and an aeration device at the bottom. The present invention relates to a membrane-embedded microbial treatment device or solid-liquid separation device arranged in the liquid of a biological reaction tank.

[Conventional technology]

In the conventional membrane-embedded microbial treatment or solid-liquid separation device (hereinafter abbreviated as solid-liquid separation device), all the filtration membrane groups are fixed to one frame member, and air bubbles from the exposure device are removed. The guide wall for guiding the filtration membrane group was fixed to the biological reaction tank.

[Problems to be solved by the device]

However, as the processing capacity of the biological reaction tank increases, the number of filtration membranes must be increased to increase the amount of solid-liquid separation processing, and therefore the solid-liquid separation device must be large in a large biological reaction tank. In the solid-liquid separation device fixed to one frame member, the weight is considerably large, so the mixed solution in the biological reaction tank is pulled out during repair inspection and cleaning of the filtration membrane. Or, the whole filtration membrane must be lifted and taken out from the biological reaction tank together with the frame member using a crane, etc. In the former case, it takes much time and the workability is poor, and in the latter case, There is a drawback that it takes a lot of time and labor because of many operations such as stopping the operation of the device, and in addition, the frame member and the guide wall have to be individually manufactured according to the capacity of the biological reaction tank, and the manufacturing cost is high. There was an expensive defect

An object of the present invention is to easily form a solid-liquid separation device according to the capacity of a biological reaction tank and to easily take it out from the biological reaction tank for repair inspection and cleaning.

[Means for solving the problem]

The characteristic structure of the membrane-embedded microbial treatment apparatus or solid-liquid separation apparatus of the present invention is that the filtration membrane group is composed of a plurality of membrane modules that are vertically stacked on a pedestal, and bubbles from the aerator are placed at the bottom of the membrane. A substantially tubular first guide wall that guides the module is provided on a peripheral portion of the gantry, and a substantially tubular second guide wall that guides the bubbles to the membrane module adjacent to the upper side.
The guide wall is provided in the peripheral portion of the membrane module, and is formed in the vertical direction in which adjacent ones are almost in communication with each other when the membrane modules are stacked one above the other. A first guide wall, which is composed of a plurality of membrane modules stacked above and below, guides bubbles from the aerator to the membrane module at the bottom, and has a sloped surface inclined toward the center of the membrane module toward the top, A second guide wall, which is provided on substantially the entire circumference of the gantry and guides the bubbles to the membrane module adjacent to the upper side, is provided in the peripheral portion of the membrane module with the upper portion inclined toward the center of the membrane module. The operational effects thereof are as follows.

[Action]

That is, the device can be formed not only by stacking a plurality of membrane modules on the pedestal, but also by guiding the bubbles from the aeration device by the first and second guide walls provided on the pedestal and the membrane module, respectively. Since air bubbles reliably pass through the filtration membrane group and clogging of each filtration membrane is prevented, it is not necessary to fix the guide wall to the biological reaction tank, and moreover, when repairing and inspecting or cleaning the filtration membrane. Can separate the upper and lower stacked membrane modules one by one and take them out from the biological reaction tank without extracting the mixed solution in the biological reaction tank.

[Effect of device]

Therefore, it is possible to assemble the solid-liquid separation device and maintain and clean the filtration membrane in a short time and with a simple operation. As a result, the workability is improved and the maintenance of the filtration performance is easy. Could be made easier.

In addition, by manufacturing one type of membrane module and changing the number of layers stacked in parallel in the horizontal direction if necessary, a solid-liquid separation device of a size corresponding to the processing capacity of the biological reaction tank can be obtained.
It can be freely formed, and it is possible to make solid-liquid separation devices of different sizes by making frame members and guide walls for fixing to biological reaction tanks with different treatment capacities as in the past. Compared with this, it became possible to easily manufacture it in the factory and install it on site, rather than on-site production, and eventually it was possible to reduce the product cost as a solid-liquid separation device.

〔Example〕

 Next, an embodiment of the present invention will be described with reference to the drawings.

As shown in Fig. 1, wastewater such as human waste and sewage, raw water such as food processing wastewater, industrial wastewater, etc. are aerated by an aeration device (1) provided at the bottom and aerobically treated with activated sludge. A biological reaction tank (2) is provided, and a plurality of tubular filtration membranes (3) are arranged side by side in the biological reaction tank (2), and the treated water in the biological reaction tank (2) is filtered. A solid-liquid separation device (4) for separating filtered water and concentrated sludge through the membrane (3) is provided to constitute a wastewater treatment device as a whole.

The aeration device (1) includes an air diffuser (1A) and a blower (1B) that sends air to the air diffuser (1A), and a solid-liquid separator (4) is arranged above the air diffuser (1A). Then, the turbulent action due to the bubbles coming out of the air diffuser (1A) and the upward flow due to the air lift action can suppress the adhesion of the activated sludge to the filtration membrane (3).

As shown in FIG. 2 and FIG. 3, the solid-liquid separator (4) comprises a plurality of membrane modules (5) stacked vertically on a pedestal (12), and a plurality of membrane modules (5). To form a filtration membrane (3) group.

The pedestal (12) forms a space (S) for accommodating the air diffuser (1A) therein, and guides bubbles from the aeration device (1) to the lowermost membrane module (5). The 1 guide wall (13) is provided on the periphery of the gantry (12).

The membrane module (5) comprises a large number of tubular filtration membranes (3) arranged side by side, a pair of holding portions (5A), (5B) for individually fixing both ends thereof, and the membrane module (5).
It is composed of the left and right side wall parts (5C) and (5C), which are the vertical length that allows adjacent parts to communicate with each other when they are stacked on top of each other, and is provided over both holding parts (5A) and (5B). From the holding parts (5A), (5B) and the side wall parts (5C), (5C), a substantially cylindrical shape for guiding the bubbles from the aeration device (1) to the membrane module (5) adjacent to the upper side. A second guide wall (14) is formed. In FIG. 1, (9) is a filtered water suction pipe which connects each filtration membrane (3) and a suction pump (P) for communication, and is connected to a holding portion (5A) of each membrane module (9).

[Another embodiment]

As shown in FIG. 4, the first guide wall (13) is provided on the entire circumference or substantially the entire circumference of the gantry (12) with a slope inclined toward the center toward the top. Guide wall (1
4) A side wall portion (5C) inclined toward the center of the membrane module (5) is provided in the upper part so that bubbles rising from below do not escape to the outside of the membrane module (5), It may be formed so as to guide it to the upper membrane module (5) together with the treated water. 6 and 7 show the above-mentioned third part.
An example of the attachment state of the first and second guide walls (13) and (14) when two unit membrane modules (5) shown in the figure or FIG. 4 are arranged side by side is shown. At this time, the adjacent points (Q) between the unit membrane modules (5)
The membrane modules (5) are arranged such that the pitch (Ps) between the membrane tubes in (1) is equal to the pitch (P) between the membrane tubes in each unit membrane module (5).

It should be noted that reference numerals are added to the claims of the utility model for convenience of comparison with the drawings, but the present invention is not limited to the structure of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 shows an embodiment of the apparatus for microbial treatment or solid-liquid separation according to the present invention. FIG. 1 is an overall side view with a part cut away, FIG. 2 is an exploded perspective view of essential parts, and FIG. FIG. 4 is a vertical cross-sectional view of the solid-liquid separation device, FIG. 4 is a vertical cross-sectional view showing another embodiment, and FIGS. 5 and 6 are vertical cross-sections showing another embodiment when two membrane module units are arranged in parallel. It is a side view. (1) ... Aeration device, (2) ... Bioreaction tank, (3) ...
… Filtration membrane, (5) …… membrane module, (10) …… doorway, (12) …… frame, (13) …… first guide wall, (14)
The second guide wall.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Eisuke Kasubu 1-247 Shishizu East, Naniwa-ku, Osaka City, Osaka Prefecture Kubota Osaka Head Office (72) Inventor Masatsugu Yamagata, Naniwa-ku, Osaka City, Osaka Prefecture Tsuto 1-24-27 Kubota Osaka Head Office (56) Reference JP-A-2-86893 (JP, A) JP-A-1-168304 (JP, A)

Claims (5)

[Scope of utility model registration request] 1. A number of tubular filtration membranes (3) arranged in parallel.
With a built-in membrane, which is provided in the upper part of the biological reaction tank (2) with the inlet / outlet (10) of the filtration membrane (3) opened and the aeration device (1) provided in the lower part Type microbiological treatment or solid-liquid separation device, said filtration membrane (3)
The group is composed of a plurality of membrane modules (5) stacked vertically on a pedestal (12), and has a substantially cylindrical shape that guides bubbles from the aeration device (1) to the membrane module (5) at the bottom. 1 guide wall (13) is provided on the periphery of the gantry (12), and a substantially cylindrical second guide wall (14) for guiding the bubbles to the membrane module (5) adjacent to the upper side is provided. A membrane-embedded microbial treatment or solid liquid provided on the periphery of the membrane module (5) and formed in a vertical length such that adjacent ones of the membrane modules (5) are almost in communication with each other when the membrane modules (5) are vertically stacked. Separation device. 2. A plurality of tubular filtration membranes (3) arranged in parallel.
Is a membrane-incorporated microbial treatment in which the inlet / outlet (10) of the filtration membrane (3) is provided in the upper portion and the aeration device (1) is provided in the lower portion to be immersed in the liquid in the biological reaction tank (2). Or an apparatus for solid-liquid separation, wherein the group of filtration membranes (3) is composed of a plurality of membrane modules (5) stacked vertically on a pedestal (12) to remove air bubbles from the aeration apparatus (1). A first slanted surface that guides to the membrane module (5) at the bottom, and slopes toward the center of the membrane module (5) toward the top
A guide wall (13) is provided almost all around the frame (12),
The second guide wall (14) for guiding the air bubbles to the membrane module (5) adjacent to the upper side is inclined toward the center of the membrane module (5) toward the upper part, and the circumference of the membrane module (5) is increased. A device for microbial treatment or solid-liquid separation with a built-in membrane provided in the section. 3. The stacked membrane modules (5) are arranged in parallel laterally in a state where a large number of the membrane modules (5) are immersed in the liquid of the biological reaction tank (2). 2. The membrane-embedded microbial treatment or solid-liquid separation device according to 2. 4. The second guide wall (14) is provided between the membrane modules (5), (5) laterally adjacent to each other in a state where a large number of the laminated membrane modules (5) are arranged in parallel. 3. The membrane-embedded microbial treatment apparatus or solid-liquid separation apparatus according to claim 1, wherein is not provided. 5. In a state where the second guide wall (14) is not provided between the membrane modules (5), (5) adjacent to each other,
The membrane-embedded type according to claim 4, wherein the tubular filtration membranes (3) have the same pitch (membrane spacing) including the filtration membrane pitch between the membrane modules (5) (5) that are laterally adjacent to each other. Equipment for microbial treatment or solid-liquid separation.