JPH0713837Y2 - Long contact filter media used to biologically purify sewage - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is used for throwing a wastewater tank into contact with the surface of the wastewater to biologically treat the wastewater for purification. The present invention relates to a long contact filter medium (hereinafter, simply referred to as a filter medium).

[Conventional technology]

Conventionally, by purifying the sewage by throwing the filter medium into the sewage tank, bringing the sewage into contact with the surface of this filter, and decomposing the organic substances contained in the sewage by the microorganisms growing on the surface of the filter. Processing techniques are being implemented. As this filter medium, the one with the highest use example is as it is,
Alternatively, the crushed empty cans are put in a net for use. This empty can is widely used because it is possible to reuse the discarded resources. Various other filter media are used, but the filter media to be used by putting them in the net is one in which many simple substances are put in the net and must be put in and taken out from the net when cleaning and reusing. It is very troublesome to put it in and out of the sewage tank. On the other hand, many filter media that are used alone without being put into the net are designed so that they have the opportunity to contact as much sewage as possible by increasing the surface area. Many of them are monotonous and do not have high purification ability.

[Problems to be solved by the device]

The present invention, when the filter material is housed in a net and used,
An object of the present invention is to provide a filter medium which has a high ability to purify sewage and which can be easily put in and taken out of a sewage tank.

[Means for Solving the Problems]

In order to solve this problem, the means adopted by the present invention is a long shape with internal and external waves, which is bendable at a number of places by providing a number of circumferential slits at appropriate intervals along the longitudinal direction. It is to use a resin flexible tube as a filter medium.

[Function of device]

Since a long resin flexible tube with internal and external waves is used as the filter medium, the surface area of the internal and external surfaces increases, the amount of microorganisms attached increases, and the ability to decompose organic substances contained in sewage is increased. As the filter media grows larger and becomes irregularly bent due to the circumferential slits, a certain gap is always formed by the waves on the inner and outer surfaces. It won't block.

In addition, since the long resin flexible pipe with internal and external waves is irregularly bent, it is easy to cause turbulent flow in the sewage that passes through this portion, and the sewage passes through the inside of the flexible pipe. As a result, it becomes easier for the wastewater and the filter medium to come into contact with each other, and the ability to purify the wastewater increases. Furthermore, unlike the case where a large number of single items such as empty cans are stored in a bag, since it is a series of long flexible pipes, it can be stored in a net as well as when it is thrown into the waste water tank as it is. When it is put into the sewage tank as well, it can be easily put in and taken out of the net, so that it can be put in and taken out of the sewage tank easily, and the work preparation time for the sewage treatment can be shortened.

〔Example〕

 Hereinafter, the present invention will be described in more detail with reference to examples.

The long resin flexible tube with internal and external waves shown in FIGS. 1 and 2 is continuously extruded in series by an extruding apparatus.

In the present invention, the corrugated structure provided inside and outside the flexible tube and its flexibility are used, and this is used as a filter medium, in addition to the flexibility, A large number of circumferential slits 2 are provided at appropriate positions in order to enhance the flexibility and allow the water to be thrown into the waste water tank in an irregular state.
By providing the slits 2 at different positions in the circumferential direction of the flexible tube, the flexible tube can be bent more irregularly.

FIG. 3 shows a use state of the filter medium 1 made of a flexible tube according to the present invention. The wastewater tank A is divided into four chambers R ₁ , R ₂ , R ₃ and R ₄ by partition walls 3, 4 and 5, and is divided from the discharge pipe 6 to the first chamber.
The solids or particles contained in the sewage D discharged into the chamber R ₁ settle on the bottom of the sewage by natural sedimentation, and the sewage not containing these is passed through the communication hole 7 provided in the partition wall 3 to the first position. 2 Room R ₂ flows naturally. The second chamber R ₂ and the third chamber R ₃ are portions for purifying the sewage from which solid matters have been removed, and the filter medium 1 made of a flexible pipe is accommodated in the mesh 8 in an irregular state, They are placed in the second chamber R ₂ and the third chamber R ₃ , respectively.
The upper end of the net 8 is hooked on a hook 9 provided on the upper ends of the partition walls 3, 4, 5. Since the filter medium 1 is made of a flexible tube and has a structure in which a large number of circumferential slits 2 are provided in the flexible tube, since it has flexibility and flexibility, the mesh 8 is irregular. Can be accommodated in the state. Room 2 R ₂ and 3
The chamber R ₃ , and the third chamber R ₃ and the fourth chamber R ₄ are in communication with each other at the lower end portions of the partition walls 4 and 5, respectively.

Then, the dirty water D flowing from the first chamber R ₁ into the second chamber R ₂ comes into contact with the outer peripheral surface of the filter medium 1 and also through the hollow portion thereof to the inner peripheral surface to adhere to these portions. The living organisms are purified by decomposing organic substances contained in the sewage by the living microorganisms. Also in the third chamber R ₃ , the same action is repeated and the purified wastewater D flows into the fourth chamber R ₄ and is sucked into the suction pipe 11 from here by the action of a pump (not shown).

Here, since the long and flexible tube forming the filter medium 1 has an uneven inner and outer peripheral surface and a large surface area,
The amount of attached microorganisms increases, and the ability to decompose organic substances contained in wastewater increases. Further, the long filter media 1 are in contact with each other and are irregularly accommodated in the net 8. However, since the inner and outer peripheral surfaces of the filter media 1 are uneven, there are always gaps in the contact parts of the filter media 1. Once formed, the filter media 1 do not block the sewage flow path due to contact between the filter media 1. In addition to this,
Since the filter medium 1 is irregularly accommodated in the net 8, the flow of the sewage passing through this portion becomes a turbulent flow, and the sewage and the filter medium 1
There will be more opportunities to come into contact with the sewage, which will increase the ability to purify wastewater.

Also, after the net 8 is used for a predetermined period of time, the net 8 is taken out from the waste water tank A, and the net 8 and the filter medium 1 contained therein
However, since the filter medium 1 is composed of a long flexible tube, it can be easily taken in and out of the net 8. For this reason, the work preparation time for sewage treatment is shortened, and the work efficiency is increased.

In this embodiment, the case where the filter medium 1 is housed in the net 8 and put into the waste water tank has been described, but the filter medium 1 may be put directly into the waste water tank and used.

[Effect of device]

Thus, according to the present invention, a long resin flexible tube with internal and external waves, which is bendable at a large number of locations, is provided as a filter medium by providing a number of circumferential slits at appropriate intervals along the longitudinal direction. Since the flexible pipe has internal and external waves, the surface area is large and the amount of attached microorganisms is large, and the flexible pipe can be bent irregularly so that the flow of sewage becomes turbulent. In addition, since the flexible pipe has internal and external corrugations, the filter media lose contact with each other and sewage easily flows, so the sewage purification capacity is enhanced. Further, since the filter medium is long, it is easy to put it in and out of the waste water tank, and workability is improved. Further, the resin flexible tube forming the filter medium can be mass-produced by continuous extrusion molding, and thus can be obtained at low cost.

[Brief description of drawings]

FIG. 1 is an overall perspective view of a filter medium 1 made of a flexible tube according to the present invention, FIG. 2 is a partially enlarged perspective view of the same, and FIG.
FIG. 3 is a cross-sectional view of a filter medium 1 made of a flexible tube according to the present invention in use. The description of the reference numerals of the main parts constituting the present invention is as follows. A: Waste water tank, D: Waste water, 1: Filter material, 2: Slit, 8: Net

Claims (1)

[Scope of utility model registration request] Claims: 1. A long contact filter used for purifying a sewage biologically by treating the sewage by throwing it into a sewage tank and contacting its surface with the sewage. Biological purification of sewage, which is characterized in that a long flexible tube is provided with a number of circumferential slits at appropriate intervals along its longitudinal direction so that it can be bent at multiple points. Long contact filter media used for cleaning.