JPH0994592A - Bacterial carrier for purifying sewage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the subject bacteria carrier satisfying conditions capable of allowing bacteria to function actively, low in cost and excellent in maintenance. SOLUTION: A planar core knitted material 30 knitted longitudinally and laterally by yarns, a planar first knitted material 10A knitted longitudinally and laterally by yarns and a planar second knitted material 20A knitted longitudinally and laterally by yarns are provided. The first knitted material 10A and the second knitted material 20A are respectively arranged on one surface and other surface of the core knitted material 30 so as to coincide with each other in a longitudinal direction and these first and second knitted materials 10A, 20A are connected and fixed to the core knitted material 30 so that gaps are provided in the longitudinal direction and connected and fixed parts respectively project in a loop state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewage purification microbial carrier for purifying dirty water in rivers, lakes and marshes, and more particularly to introducing sewage into a storage tank for aeration and flowing of sewage. While converting the pollutant to microorganisms (fungi,
It also relates to a carrier for supporting microorganisms when it is purified by the activity of metazoans and the like).

[0002]

2. Description of the Related Art The construction of a purification facility using such a microorganism carrier for purifying sewage has been promoted because of its advantages such as being extremely natural for ecosystems, low running costs, and a small facility space. ing.

Although it is possible to use a porous metal plate or the like as a carrier, a combination of a string or a thread loop is generally used at present because the contact area cannot be increased. .

Representatively, there are those disclosed in Japanese Patent Publication No. 6-65291, Japanese Patent Publication No. 5-48116, and Japanese Patent Publication No. 2-5155.

Each of these is a combination of a trunk portion and a loop yarn, or is twisted or wound in a spiral shape. As a whole, it is, so to speak, one tree (hereinafter also referred to as a tree-shaped carrier). It is configured as. Here, the reason why the loop yarn is used, twisted in a spiral shape, or wound is to increase the contact area of the microorganism as much as possible and to increase the contact frequency with new water to be treated.

Therefore, when actually installed in a treatment tank, a large number of tree-like carriers are suspended at appropriate intervals on a suitable support member and immersed in sewage.

[0007]

Generally, in a purification facility using a microorganism carrier of this type, the ability of microorganisms to easily adhere to the microorganism carrier and a high oxygen supply efficiency enhance the purification ability. Therefore, it is important that the microbial carriers have appropriate intervals, that the liquid accompanying aeration flows properly, and that oxygen is sufficiently supplied to all corners.

On the other hand, unless the volume occupied by the microbial carrier per unit volume is large, the microbial carrier does not exhibit sufficient purification ability. Therefore, as long as a conventional tree-like carrier is used, an extremely large number of arrangements are required.

That is, looking at the tree-shaped carrier that has been generally used in the past, water rises between adjacent tree-shaped carriers without coming into contact with the tree-shaped carriers, so that there is a dead space. If this is not solved, it is necessary to closely arrange the tree-like carriers, and therefore, it is necessary to use a large number of tree-like carriers, which significantly increases the cost.

Further, when the tree-shaped carrier is used, it is necessary to individually knit it, which is not suitable for mass production. Further, it is necessary to attach each tree-like carrier to the support member one by one, and the assembly cost is too large to be ignored. Moreover, after operating for a long time, it is necessary to remove the microorganisms adhering to each tree-shaped carrier together with the attached pollutant components or replace it with a new tree-shaped carrier. It is not appropriate from the aspect.

[0011] Therefore, the main object of the present invention is to provide a product which satisfies the conditions for active activity of microorganisms, is low in cost, and is excellent in maintenance.

[0012]

The invention according to claim 1 which has solved the above-mentioned problems, is a microbial carrier which is installed in contact with sewage for purification of sewage. A large number of continuous loop yarns forming a loop continuously or intermittently along the first direction line at intervals in a second direction substantially orthogonal to the first direction. A sewage purification microorganism carrier, comprising: a yarn group; and a connecting member along the second direction that is connected to maintain the distance between the continuous loop yarns of the loop yarn group.

According to a second aspect of the present invention, in a microbial carrier which is installed in contact with wastewater for purification of wastewater, a large number of loops projecting to one side of the first direction line are provided.
A first continuous loop yarn formed continuously or intermittently along the direction line of the second line which is substantially orthogonal to the first direction.
A plurality of first loop yarn groups formed at intervals in the direction of and a plurality of loops extending to the other side of the first direction line are continuously or intermittently formed along the first direction line. A second loop yarn group in which a large number of second continuous loop yarns are formed at intervals in a second direction that is substantially orthogonal to the first direction, each first continuous loop yarn of the first loop yarn group, and A microbial carrier for sewage purification, comprising: a connecting member along the second direction, which is connected to hold the interval between the second continuous loop yarns of the second loop yarn group.

According to a third aspect of the present invention, in a microbial carrier which is placed in contact with wastewater for purification of wastewater, a planar core knitted body knitted in lengthwise and crosswise directions with a yarn, and one side of this core knitted body A second continuous loop yarn, which forms a large number of loops extending continuously from the core knitted body continuously or intermittently along the first knitting direction line, is substantially orthogonal to the first direction. A large number of first loop yarn groups formed at intervals in the direction of and a large number of loops protruding from the other surface of the core knitted body are continuously or intermittently formed along the first knitting direction line. The second continuous loop yarn is the first
A second loop yarn group formed in large numbers at intervals in a second direction substantially orthogonal to the direction, and the first loop yarn group and the second loop yarn group are fixed to the core knitted body. A microbial carrier for sewage purification, which is characterized in that

Further, according to the invention of claim 4, in a microbial carrier which is installed in contact with wastewater for purification of wastewater, a planar core knitted body knitted in the lengthwise and crosswise directions and in the lengthwise and crosswise directions by the thread. A knitted planar first knit,
A second knitted body that is knitted in the lengthwise and crosswise directions with a yarn, and a first knitted body is formed on one side of the core knitted body and a second knitted body is formed on the other side of the core knitted body.
The knitted bodies are arranged so that their longitudinal directions coincide with each other, and the first knitted body and the second knitted body are spaced from each other in the longitudinal direction, and the connecting and fixing portions project from each other in a loop shape. Is a microbial carrier for purifying sewage, characterized by being connected and fixed to.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be clarified while describing embodiments thereof.

(First Embodiment) FIGS. 1 to 3 show a first embodiment, in which a warp yarn 11 and a weft yarn 12 are shown.
The first knitted body 10 is knitted in the vertical and horizontal directions, and the second knitted body 20 is knitted in the vertical and horizontal directions by the warp yarns 21 and the weft yarns 22.

The first knitted body 10 and the second knitted body 20 can be knitted by a general loom. In this case, as shown in FIG. 1, an appropriate number of connecting portions X in which four weft threads 12 in the illustrated example are densely arranged are
For example, the first knitting body 10 is alternately formed with small intervals S and large intervals R in the longitudinal direction, whereas the second knitting body 20 is alternately formed with large intervals R in the longitudinal direction. And a small space S and is formed.

The first knitted body 10 and the second knitted body 20
In the assembled state, the connecting portion X of the first knitting body 10 is overlapped with the connecting portion X of the second knitting body 20 as shown by an arrow in FIG.
For example, they are connected by a binding thread (not shown), and as shown in FIGS. 2 and 3, each large-interval R portion is projected outward.

As a result, due to the protrusion of each large-interval R portion, one warp yarn 11 and 21 has a large number of loop groups that protrude from the longitudinal (first direction) line in FIG. 1 intermittently in the longitudinal direction. Is forming. Therefore, in the present invention, the warp yarns 11 and 21 form a continuous loop yarn. Further, since the warp threads 11 and 21 are formed in large numbers at intervals in the second direction penetrating the plane of the paper of FIG. 1, as shown in FIG.
A loop yarn group and a second loop yarn group are configured.

Further, the weft yarns 12 and 22 themselves maintain the above-mentioned intervals between the first continuous loop yarns 11, 11 ... Of the first loop yarn group and the second continuous loop yarns 21, 21 ... of the second loop yarn group. To form a connecting member connected to the second direction along the second direction. The weft threads 12 and 22 themselves constitute a connecting member, and the first continuous loop threads 11, 11 ... And the second continuous loop threads 21, 21 ... are sewn on a belt or a ribbon (not shown) extending in the lateral direction. Embodiments such as inserting or connecting using an appropriate thread are also proposed.

Such a microbial carrier is, as shown in FIG.
In the figure, the unit is configured by suspending the supporting member 40 along the direction of penetrating the drawing sheet by using the warp threads 11 and 21 via an appropriate member or directly. Preferably, a frame member may be attached to the lower portion of the carrier, and further frame members (both not shown) may be attached to both sides to form a unit.

The microorganism carrier units U are installed in the septic tank 3 in parallel and in a zigzag overall arrangement as shown in FIGS. 4 and 9, for example. Raw sewage W0 of rivers and lakes is introduced into the septic tank 3, and is aerated from a number of aeration tubes (not shown) arranged at appropriate positions in the septic tank 3. In this process, a swirling flow is formed from the bottom to the top and partly re-dive to the wastewater. Since aeration is performed in the fluidized state of the sewage, the activity of microorganisms attached to the carrier is activated, thereby purifying the sewage. The purified water W1 is returned to rivers and lakes again.

Here, in particular, as shown in FIG.
In the microbial carrier of the present invention, due to the relationship with the adjacent microbial carrier, it is possible to form an effective planar arrangement with less dead space.

In the present invention, the warp yarns or the weft yarns can be formed by a single yarn or a bundle yarn. Therefore, even in the following, it is simply referred to as "thread" unless otherwise specified.

(Second Embodiment) In the first embodiment, the first knitting body 10 and the second knitting body 20 are combined, but as shown in FIG. The knit 10 can be connected to the warp yarns 4, 4, ... In order to utilize only the body 10 and instead ensure a loop.

In this case, at least one of the warp yarn 11 and the weft yarn 12 of the knitted body 10 is connected to the warp yarns 4, 4, ... Through other yarns (not shown) or directly by knitting to integrate them. You can

(Third Embodiment) FIGS. 6 to 8 show a third embodiment. That is, the planar core knitted body 30 knitted in the longitudinal and transverse directions by the warp yarn 31 and the weft yarn 32, the first planar knitted body 10A knitted in the longitudinal and transverse directions by the warp yarn 11 and the weft yarn 12, the warp yarn 21 and the weft yarn 2
The second knitted body 20A is knitted in the vertical and horizontal directions to form a second knitted body 20A.

In this case, for example, as shown in FIG. 6, the connecting portions X of the first knitting body 10A and the second knitting body 20A are arranged at equal intervals. With respect to this interval, the connecting portion Y formed by the weft thread group 32 of the core knitted body 30
Is set to, for example, 1/2 as short as possible.

As shown in FIG. 7, the core knitted body 3
The first knitted body 10A is arranged on one side of 0 and the second knitted body 20A is arranged on the other side so that the longitudinal directions thereof coincide with each other, and the first knitted body 10A and the second knitted body 20A are spaced in the longitudinal direction. , And the connecting and fixing portions X, X project from each other in a loop shape, and are connected and fixed to the core knitted body 30. For this connection and fixing, each knitted body 10
A, 30, 20A may be formed by knitting each other, or may be fixed by using an appropriate connecting material, for example, connecting thread. This fixing point can be selected as appropriate.

In the third embodiment, in advance,
As shown in FIG. 6, the first knitted body 10A, the second knitted body 20A, and the core knitted body 30 are separately formed into long fabrics by using a loom, and each of them is predetermined at the time of assembly. It can be cut to length and, if necessary, cut into even smaller widths and, as described above, can be connected and fixed using, for example, a connecting thread. Therefore, as compared with the case of the above-mentioned tree-shaped carrier, the productivity is extremely excellent in that the loop can be formed at once. Also,
The knitting body depends on the size of the loom, but usually a maximum of 2.5
Continuous long knitting with a width of about 3.0 m is possible,
Therefore, as compared with the case of manufacturing a conventional tree-shaped carrier, mass production is possible, and if necessary, a wide width can be cut into an arbitrary width to obtain a short width.

In the third embodiment, it is possible to obtain a core knitted body 30 and one, for example, the first knitted body 10A, in which a loop is formed only on one side.

(Other Embodiments) In the carrier obtained in each of the above-mentioned embodiments, as shown in FIGS. 2 and 7, loops are formed at intervals in the depth direction. The carrier can be turned 90 degrees to space the loops horizontally. In this case, the weft thread 11 or 21 is a warp thread, which can be attached to, for example, the support member 40 described above.

The carrier unit U may be arranged in the septic tank 3 in a twill weave arrangement or the like in plan view, as shown in FIG.

The combinations of the above examples can be appropriately performed.

Polyester thread, nylon thread, etc. can be used as the thread of the present invention, but it has been found that vinylidene chloride resin thread is the most suitable from the viewpoint of adhesion of microorganisms.

The microbial carrier for purifying sewage of the present invention or the unit thereof can be installed not only in a septic tank but also directly in a river or lake.

[0038]

As described above, according to the present invention, the condition that the microorganisms can be activated actively is satisfied, and the cost is low,
Moreover, it is possible to obtain a microorganism carrier that is excellent in maintenance.

[Brief description of drawings]

FIG. 1 is a front view showing a knitted body as a constituent element of a microbial carrier of the present invention.

FIG. 2 is a side view of an assembled state according to the first embodiment.

FIG. 3 is a perspective view of an assembled carrier.

FIG. 4 is a side view of an example of arrangement of microbial carriers with each other.

FIG. 5 is a perspective view of an assembled state in the second embodiment.

FIG. 6 is a front view showing a knitted body as a constituent element of a microbial carrier according to a third embodiment.

FIG. 7 is a side view of the assembled state.

FIG. 8 is a perspective view of the assembled carrier.

FIG. 9 is a plan view of an installation example of a unit group in a septic tank.

FIG. 10 is a plan view of another example of installation of the unit group in the septic tank.

[Explanation of symbols]

3 ... septic tank, 4 ... warp yarn, 10, 10A ... 1st knitted body, 1
1 ... Warp yarn, 12 ... Weft yarn, 20, 20A ... Second knitted body, 2
DESCRIPTION OF SYMBOLS 1 ... Warp yarn, 22 ... Weft yarn, 30 ... Core knitted body, 31 ... Warp yarn, 32 ... Weft yarn, 40 ... Support member, X, Y ... Connection part, U
… Microbial carrier unit.

Claims (4)

[Claims] 1. A microbial carrier, which is placed in contact with wastewater for purification of wastewater, comprises a plurality of loops extending from the first direction line continuously or intermittently along the first direction line. A large number of continuous loop yarns formed in the second direction substantially orthogonal to the first direction, and the continuous loop yarns of the loop yarn group maintain the distance. A microbial carrier for purifying sewage, comprising: a connection member connected for the purpose of extending along a second direction. 2. A microbial carrier that is placed in contact with wastewater for purification of wastewater, wherein a large number of loops extending to one side of the first direction line are continuously or continuously provided along the first direction line. First to form intermittently
A continuous loop yarn includes a first loop yarn group formed in large numbers at intervals in a second direction substantially orthogonal to the first direction, and a large number of loops extending to the other side of the first direction line. , A second formed continuously or intermittently along the first direction line
A second loop yarn group, in which a large number of continuous loop yarns are formed at intervals in a second direction substantially orthogonal to the first direction, each first continuous loop yarn of the first loop yarn group, and the first loop yarn group. A microbial carrier for purifying sewage, comprising: a connecting member along the second direction that is connected to hold the interval between the second continuous loop yarns of the two-loop yarn group. 3. A microbial carrier that is placed in contact with sewage for purification of sewage, in the form of a flat core knitted body that is knitted in the lengthwise and crosswise directions with a thread, and a large number of loops extending from one side of the core knitted body. The first continuous loop yarns formed continuously or intermittently along the first knitting direction line of the core knitted body are spaced in the second direction substantially orthogonal to the first direction. A first loop yarn group formed by placing a large number and a second continuous loop yarn forming a large number of loops protruding from the other surface of the core knitted body continuously or intermittently along the first knitting direction line; , A second loop yarn group formed in large numbers at intervals in a second direction substantially orthogonal to the first direction, and the first loop yarn group and the second loop yarn group with respect to the core knitted body For purification of sewage characterized by being fixed Microbial carrier. 4. A microbial carrier to be placed in contact with wastewater for purification of wastewater, comprising a planar core knitted body knitted in lengthwise and crosswise directions by a yarn, and a planar first knitted body knitted in lengthwise and crosswise directions by a thread. It has a knitted body and a planar second knitted body knitted vertically and horizontally by yarns, and the first knitted body is arranged on one side of the core knitted body, and the second knitted body is arranged on the other side of the core knitted body in the longitudinal direction. The first knitting body and the second knitting body are connected and fixed to the core knitting body at intervals in the longitudinal direction, and the connecting and fixing portions project from each other in a loop shape. A microbial carrier for purifying sewage, which is characterized by: