JPH0560595U - Biological contact filter media - Google Patents

Abstract

(57) [Abstract] [Purpose] Conventionally, as a fibrous contact material installed in the aeration tank of a water treatment device, a cloth is applied to the central part or both surfaces of one side of many juxtaposed fibers and sewn together. Some of them are formed in a band shape, but when they are installed in the tank, the shape becomes unstable, and the amount of sludge microorganisms attached is limited, so that it was difficult to increase the density. The present invention kept microorganisms in an active state and enabled high density. The biological contact filter according to the present invention is characterized by comprising a core material having a certain degree of rigidity. The core material having a cross-shaped cross section, a Y shape, etc.
A plurality of fibrous contact materials are attached along the core material. As a result, the shape is maintained even when installed in the tank, good contact with the liquid is achieved, and high density makes it possible to cope with high loads and improve processing performance.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a water treatment device for purifying wastewater such as factory wastewater and domestic wastewater by the catalytic oxidation action of microorganisms, and particularly to improvement of a biological contact filter medium filled in an aeration tank used in such a device.

[0002]

[Prior Art]

 In a water treatment apparatus by biological treatment, an aeration tank is filled with a biological contact filter medium, and by adhering microorganisms as activated sludge to the contact filter medium, the microorganisms are proliferated and the purification function is enhanced. Conventionally, various types of contact filter media of this type have been developed. For example, the one disclosed in Japanese Utility Model Publication No. 63-50298 discloses a loop-shaped fiber material which is planted in a tubular core. However, there was a limit to the amount of activated sludge adhering to it.

In addition, a cheap contact filter material has a problem of causing blockage, and a non-blocking filter material uses a special fibrous contact filter material. FIGS. 6 and 7 show such a conventional contact filter material. As shown in those figures, a plurality of fibers 1 of the same length and arranged side by side are arranged side by side with a cloth 2 applied to both sides along the central part or one side of the fibers 1 and formed into a band shape by stitching together with the cloth. However, there were some problems as described below.

[0004]

[Problems to be solved by the device]

 The contact filter media as shown in Fig. 6 and Fig. 7 did not cause blockage, but the shape was unstable when installed in the aeration tank, and the amount of activated sludge deposited was limited. Therefore, it was difficult to achieve high density. Therefore, there was also a limit to the design of a high-load, compact device.

An object of the present invention is to eliminate the above-mentioned problems of the prior art, and therefore increase the adhered amount of activated sludge microorganisms, thus enabling higher densification and further stabilizing the shape. It is to provide a biological contact filter medium.

[0006]

[Means for Solving the Problems]

 The feature of the biological contact filter medium according to the present invention is that the biological contact filter medium comprises a fibrous contact medium 10 installed in an aeration tank of a water treatment device, further comprising a core member 20 and a plurality of the fibers along the core member. That is, the contact member 10 is attached. As the core material, a cross-section having an appropriate shape such as a cross shape, a Y shape, or an H shape is used.

[0007]

[Action]

 Since the plurality of fibrous contact materials 10 are combined and installed by using the core material 20 in this manner, the fibrous contact materials can be arranged at a high density and the amount of attached sludge can be increased. Further, since the fibrous contact material is supported by the core material, the shape is maintained by the rigidity of the core material.

[0008]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a first embodiment of the biological contact filter medium according to the present invention. As shown in the figure, this contact filter medium includes a fibrous contact medium 10 and a core material 20 as a supporting material thereof. It is characterized by The fibrous contact material 10 used in this biological contact filter medium is similar to the conventional one shown in Figs. It is composed of the cloth 12 attached thereto, and they are sewn together to form a strip. 13 indicates the sewing thread.

The core material 20 is required to have a certain degree of rigidity, but its material is not particularly limited, and is preferably composed of a suitable material such as resin. In this first embodiment, as the fibrous contact material 10, a cloth 11 is applied to the central portion of the fiber 11 as shown in FIG. 6, and a core material 20 having a cross section is used. A pair of fibrous contact materials 10 are symmetrically attached to the core material. The fibrous contact material 10 is attached to the core material 20 by a suitable means such as screwing or bolts and nuts. In this case, the contact area with respect to the microorganisms is about twice that of the conventional one.

Further, FIG. 2 shows a second embodiment in which a cross-section having a cross section is used as a core material, and both sides of one side of the fiber 11 as shown in FIG. A fibrous contact member 10 sewn with a cloth 12 is attached to it. In this case, the fibrous contact material 10 is attached to each of the four sides 21 of the core material. Needless to say, these fibrous contact materials 10 are attached to the core material at the cloth 12 portion thereof.

The length of each fiber 11 projecting from the fabric 12 is preferably substantially constant and the projecting length is suitably chosen, in one example about 40 mm. As the fiber, for example, a thread-shaped fiber having a diameter of 10 to 100 μm is used, and a fiber material such as polyvinylidene chloride or nylon is preferably used.

FIG. 3 shows a third embodiment of the present invention. In this example, a core material 20 having a Y-shaped cross section is used, and preferably, each of the three sides thereof has a fibrous contact. The material 10 is attached.

As a fourth embodiment, as shown in FIG. 4, a core 20 having an H-shaped cross section may be used. The contact material 10 is inserted and fixed. In this case, a pair of fibrous contact materials are attached to the core material, and the attachment is easily performed.

FIG. 5 shows still another embodiment. In this embodiment, a flat plate-like material is used as the core material 20. The contact material 10 is attached. Therefore, the core material is provided with a pair of fibrous contact materials.

In the above-described embodiment, the cross-section, the Y-shape, the H-shape, and the rectangular cross section are used as the core material 20, but it goes without saying that the core material is not limited to these. However, any shape may be used as long as a plurality of fibrous contact members 10 can be attached along the length thereof. The core 20 may be of various types, for example, having a cross-sectional shape in which a plurality of sides extend radially from the center.

Therefore, in the biological contact filter of the present invention, since a plurality of fibrous contact members 10 are attached to the core member 20, the adhesion area of sludge microorganisms is increased several times as compared with the conventional one, and high density is achieved. become. Further, each fiber is preferably brought into contact with the liquid by stirring with the liquid by aeration in the aeration tank, and the microorganisms attached thereto can always be kept in an active state. Further, since each fibrous contact material 10 is attached to and supported by the core material 20, it is always held in a predetermined shape in the aeration tank by the rigidity of the core material.

[0017]

[Effect of the device]

 As described above, according to the present invention, the density of the biological contact filter medium can be increased, the amount of sludge microorganisms attached can be increased, and its shape can be appropriately maintained. Can be kept active at all times. Therefore, there are advantages that the processing performance can be remarkably improved, a high load can be supported, and a compact device can be designed.

[Brief description of drawings]

FIG. 1 is a perspective view showing a biological contact filter medium according to an example of the present invention.

FIG. 2 is a perspective view showing another embodiment of the present invention.

FIG. 3 is a perspective view showing another embodiment of the present invention.

FIG. 4 is a perspective view showing another embodiment of the present invention.

FIG. 5 is a perspective view showing another embodiment of the present invention.

FIG. 6 is a perspective view showing an example of a conventional biological contact filter medium.

FIG. 7 is a perspective view showing another example of a conventional biological contact filter medium.

[Explanation of symbols]

 10 fibrous contact material 11 fiber 12 cloth 20 core material

Claims (1)

[Scope of utility model registration request] 1. A biological contact filter comprising a fibrous contact material installed in an aeration tank of a water treatment device, wherein the fibrous contact material is a cloth on both sides of a central part or one side of a large number of fibers arranged in parallel. In the one formed into a band by applying and stitching, the biological contact filter medium further includes a core member,
A biological contact filter material, wherein a plurality of the fibrous contact materials are attached along the core material.