JPH084160Y2 - Contact filter media for sewage treatment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a contact filter medium for treating sewage. This filter medium is used to fix aerobic or anaerobic microorganisms and to purify sewage.

[Prior Art] Several types of contact filter media for treating sewage are conventionally known. For example:

(A) A corrugated shape made of plastic.

(B) A honeycomb or tube formed of plastic. (See Japanese Examined Patent Publication No. 59-38836 and Japanese Examined Publication No. 55-47680) (c) A zigzag non-woven fabric plate. (JP-A-56
-See No. 24095) (d) Non-woven fabric plate fixed via a spacer. (See Japanese Patent Laid-Open No. 63-209787) (e) Net-like or rustle-like one.

(F) A ball shape with many voids made of plastic.

[Problems to be Solved by the Invention] In the technology of using plastic as described in (a), (b), and (f) above, since the plastic filter medium is molded in the factory and transported to the processing site, transportation and storage costs are high. Is expensive. This is because the filter medium has many voids and is relatively light, but is bulky because of the voids.

It takes time to assemble a non-woven fabric plate into a specific shape in a treatment plant as in the above (c) and (d).

The present invention has been made in view of the drawbacks of the above technology, and by combining only the advantages of the above technology, a contact place for treating wastewater that does not require a place to carry and is easy to assemble in a treatment plant. The purpose is to provide a filter medium.

[Means for Solving the Problem] The contact filter medium for wastewater treatment of the present invention is made of a non-woven fabric plate in the shape of a polygonal three-dimensional cell composite, and is characterized in that it can be folded in a finished state.

The most preferable shape of the foldable polygonal solid cell is a quadrangular prism having a rhombic cross section, but other hexagonal prisms, quadrangular prisms having a square or rectangular cross section, etc. can also be adopted.

The thickness of the non-woven board is about 0.1-0.5 cm, most preferably about 0.2
cm. When forming a rhomboid or square quadrangular prism with this nonwoven fabric plate, each side preferably has a rhombus shape with a length of about 5 to 15 cm. When forming a hexagon with this nonwoven fabric plate, the length of each side is about 4-8 cm, most preferably about 5 cm.
A regular hexagon of cm is preferable. However, these numbers may change in order to provide appropriate rigidity and flexibility depending on the purpose of use of the frame material. The length of the nonwoven fabric plate in the longitudinal direction depends on the depth of the sewage treatment tank in which the nonwoven fabric plate is installed.

Joining at each vertex of the polygon can be performed by, for example, sewing with a sewing machine, an adhesive, welding, or the like.

When the strength of the non-woven fabric plate is weak, a thermosetting resin such as unsaturated polyester may be impregnated.

In order to remove the offensive odor of the wastewater treatment facility, the non-woven fabric board can be impregnated with a deodorant.

Further, the nonwoven fabric plate may be provided with an appropriate number of through holes.

[Function] The nonwoven fabric plate is light, has many small gaps and has a large surface area, and is optimal for immobilizing microorganisms. This non-woven fabric is formed into a foldable polygonal solid cell shape in advance in a production plant. Polygonal cells, especially rhombic, square sections,
The rectangular and hexagonal shapes are composed of three or two parallel surfaces, so when a force is applied to squeeze the polygon, the polygon is folded obliquely into a substantially plate shape. Therefore, it is possible to reduce the volume by making it plate-like during transportation. It is easy to assemble at the treatment plant because it only needs to be restored to its original shape.

[Embodiment] An embodiment of the present invention will be described below with reference to the accompanying drawings.

 1 to 3 show a first embodiment of the present invention.

FIG. 1 is a perspective view showing a state in which a sewage treatment filter medium according to a first embodiment of the present invention is stretched over a treatment tank. As is clear from this figure, the pillars 2, 2A, 2B ... Of the rhombic cell in cross section form the filter medium continuously in the longitudinal direction and the lateral direction. The outermost part of this filter medium is an anchor 4 made of wood, metal or synthetic resin.
The position is fixed by.

As shown in the plan view of FIG.
This is a three-dimensional cell in which a plurality of nonwoven fabric plates 6 are joined at a vertex 8 by bending and sewing.

The thickness of the nonwoven fabric plate is about 0.2 cm. The length of the non-woven fabric plate 6 varies depending on the depth of the processing tank, but is usually 0.5-2 m. The non-woven fabric plate 6 constitutes a rectangular prismatic cell 2 having a rhombic cross section with a side length of 10 cm. Although not shown, the nonwoven fabric plate may be provided with an appropriate number of through holes.

The non-woven fabric plate 6 may be impregnated with a deodorant of a type that does not affect microorganisms to remove the bad odor in the purification facility.

This nonwoven fabric plate 6 is folded as shown in FIG. 3 during transportation and storage.

 4 to 6 show a second embodiment of the present invention.

FIG. 5 is a perspective view showing a state in which a filter medium for treating sewage is stretched over a treatment tank. The overall appearance is similar to that of FIG. 1 of the first embodiment, but the second embodiment is different from the first embodiment as shown in FIG. Not that it is a square pole with a square cross section.

The nonwoven fabric plate 6a has a thickness of about 0.2 cm. The length of the non-woven fabric plate 6 varies depending on the depth of the processing tank, but is usually 0.5-2 m. The non-woven fabric plate 6 constitutes a square prismatic cell 2 having a square cross section with a side length of about 10 cm. Although not shown,
The nonwoven fabric plate 6a may be provided with an appropriate number of through holes.

This non-woven board can be impregnated with a deodorant of a type that does not affect microorganisms to remove the bad odor in the purification facility.

This nonwoven fabric plate 6a is folded as shown in FIG. 6 during transportation and storage.

7 to 9 show a third embodiment of the present invention.

FIG. 7 is a perspective view showing a state in which a filter medium for treating sewage is stretched over a treatment tank. The third embodiment differs from the first and second embodiments in that the cubic cells 6b have a honeycomb structure with a hexagonal cross section, as shown in FIG.

Each hexagonal cell 2b has 2 cells as shown in the enlarged view of FIG.
This is a three-dimensional cell formed by bending two non-woven fabric plates 6b, 6b at four side portions 9, 9, 9, 9 and joining them at two upper and lower portions 10, 10 by sewing. The side portion 21 of each cell 2 overlaps with the side portion 21 of the adjacent cell that is continuous in the lateral direction.

The thickness of the nonwoven fabric plate is about 0.2 cm. The length of the non-woven fabric plate 6 varies depending on the depth of the processing tank, but is usually 0.5-2 m. The non-woven fabric plate 6 constitutes a hexagonal prismatic cell 2b having a regular hexagonal cross section with a side length of 5 cm. Although not shown, the nonwoven fabric plate may be provided with an appropriate number of through holes.

The non-woven fabric plate 6b can be impregnated with a deodorant of a type that does not affect microorganisms to remove the offensive odor in the purification facility.

The nonwoven fabric plate 6b is folded as shown in FIG. 9 during transportation and storage.

[Effect] Since the contact filter medium for wastewater treatment of the present invention is formed by assembling a non-woven fabric plate into a shape of a foldable polygonal solid cell,
It can be made into a plate shape during transportation to reduce the volume.
It is easy to assemble at the treatment plant because it only needs to be restored to its original shape.

Further, according to the first embodiment, compared with the second and third embodiments, there is a special effect that the number of anchors can be reduced by folding horizontally.

[Brief description of drawings]

1 to 3 show a first embodiment of the present invention. First
FIG. 1 is a perspective view showing a state in which the filter medium for wastewater treatment of the present invention is stretched over a treatment tank. FIG. 2 is a plan view. FIG. 3 is a side view of the filter medium folded. 4 to 6 show a second embodiment of the present invention. Fifth
FIG. 1 is a perspective view showing a state in which the filter medium for wastewater treatment of the present invention is stretched over a treatment tank. FIG. 4 is a plan view. FIG. 6 is a side view of the filter medium folded. 7 to 9 show a second embodiment of the present invention. Seventh
FIG. 1 is a perspective view showing a state in which the filter medium for wastewater treatment of the present invention is stretched over a treatment tank. FIG. 8 is a partially enlarged perspective view. Ninth
The figure is a side view of this filter medium in a folded state.

Claims (4)

[Scope of utility model registration request] 1. A contact filter medium for sewage treatment, comprising a nonwoven fabric plate in the shape of a polygonal three-dimensional cell composite, which can be folded in a finished product. 2. The filter medium according to claim 1, wherein the polygonal cells are square poles having a rhombic cross section. 3. A non-woven fabric plate impregnated with a deodorant.
The filter medium according to the item. 4. The filter medium according to claim 1, wherein the nonwoven fabric plate is provided with through holes.