JPS61493A - Biological filter material - Google Patents

Abstract

PURPOSE:To improve the separability of a formed biological membrane, by connecting the outer peripheral part of a widely opened side to the plate shaped connection member integrated with an outer ring and providing the rib protruded from the side surface of each widely opened side to the circumferentially directed side surface of each elemental ring in the axial direction. CONSTITUTION:An inner ring 1 and an outer ring 2 are concentrically arranged and an even number of elemental rings 3a, 3b, 3c each formed in the annular space between both rings 1, 2 in a thin ring shape are arranged in radical relation to the axis of the inner and outer ring 1, 2. Elemental rings are connected to the inner and outer rings 1, 2 in integral relation thereto so as to be inclined alternately in opposite directions with respect to the circumferential direction of said inner and outer rings 1, 2 and arranged obliquely in a state looked from the outside so as to alternately show a V-shape and an inverted V-shape by the elemental rings 3a-3c. This biological filter material is formed of polypropylene with specific gravity of 0.92-0.95 from an object used in a state immersed in water or floated on the surface of water.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to biological F#, particularly biological P material for use in purifying wastewater and for attaching biological film.

Conventional technology As a method for purifying general wastewater, including human waste and domestic wastewater, discharged from cities or rural villages, biological ν material is immersed and suspended in the wastewater, and a biofilm is attached to the surface of the biological sludge material. The so-called biofilm method for purifying pollutants during discharge is beginning to become popular. A known filler that can be applied to the biomaterial used in this biofilm method is Japanese Patent Publication No. 47-41225.

There is one shown in each specification of Utility Model Publication No. 44-14682.

Problems to be Solved by the Invention Among the above conventionally known examples, the former Japanese Patent Publication No. 47-41225
The filling shown in the specification has a planar structure, but the structure including curved surfaces and holes is extremely complicated.

There was a problem that manufacturing costs were high.

On the other hand, the latter packing shown in Japanese Utility Model Publication No. 44-14682 is commercially available under the trade name Terralet, but this conventional packing has a linear structure and is ineffective for stirring and absorption. Yes, but.

It is not expected to be very effective in attaching biofilms.

Furthermore, there was a problem that the structure was complicated and the manufacturing cost was high.

Means and Effects for Solving the Problems The present invention was conceived in view of the above, and includes an even number of thin plate-shaped rings in the annular portion between the inner ring and the outer ring which are arranged concentrically. The element ring is tilted in opposite directions radially and circumferentially with respect to the axes of the inner and outer rings, and a reduced portion and an expanded portion are formed on both sides of the inner and outer rings in the axial direction. The tops of the adjacent element rings on the contracting side are connected by a plate-shaped connecting member.

In addition, a plate-shaped 1 whose outer periphery on the expansion side is integrated with the outer ring
They are connected by a connecting member, and a rib is provided in the axial direction on the side surface of each element ring in the circumferential direction, protruding from the side surface on the expansion side of each element ring. A large number of each biological F material is dipped and suspended in wastewater.

Example Embodiments of the present invention will be described based on the drawings.

In the figure, 1 is an inner ring, 2 is an outer ring, these are arranged concentrically, and an even number of element rings 3α are formed in a thin annular shape in the annular space between the inner rings 1 and 20.

3A, 3c, ...... are the inner and outer rings 1,
0 each element ring 3 arranged radially with respect to the axis of 2
α.

3b, 3c, . . . are the middle portions in the axial direction.

The outer surface is the inner ring 1. They are integrally connected to the outer ring 2 and are inclined in opposite directions alternately with respect to the circumferential directions of the inner and outer rings 1.2, and when viewed from the outside, each adjacent element ring 3α,
31r, 3c, . The respective top and side parts on the contraction side are connected by plate-shaped connecting members 4α and 4h, and the V-shaped part, that is, the outer periphery on the expansion side is a plate-shaped part integrated with the outer ring 2. As a result, each element ring 3a, which is connected by a connecting member 5,
3b, 3c, etc. are inner and outer rings 1,
2 are connected by connecting members 4a, 4h and 5 alternately on both sides in the axial direction.

A rib 6 is provided on the side surface of each element ring 3α, 3b, 3c, . . . , and each element ring 3α, 3h, 3c.

. . . protruding from the side surface on the expanded side and provided linearly in the axial direction between both axially apex portions, and the ribs 6.6 facing each other in the expanded portion. The interval between the pixel element rings including the rib 6.6 at the top of the V-shape is narrower, and between the element rings on the expansion side, the pixel element rings on the top side of the V-shape of other living things PI It's designed not to get stuck.

The ribs 6 are provided with fins 7, which maintain strength and increase the surface area.

The inner ring 1 has a short tubular shape with a predetermined length,
Further, the outer ring 2 has a disk shape having a predetermined width in the direction perpendicular to the axis, and each element ring 3α.

3b, 3c, . . . are shaped like long disks in the axial direction.

The bioreactor material having the above structure is molded from a common synthetic resin using a common plastic manufacturing method such as injection molding. At this time, the dividing surface (cutting line) of the mold is between the inner and outer rings I, which are intermediate in the axial direction.

Make a mold so that the 1-part mold is separated in the axial direction by positioning the mold in position 2. At this time, each element ring 3a, 3h.

3c, . . . are inclined, so each element ring 3a, 3b, 3c, . . .
・As shown in FIG. 4, the mold can be manufactured easily by forming a step at the position of the parting line. Although not shown in each drawing, each constituent member is provided with a draft angle in the direction of removal of the mold.Furthermore, the biological reactor material according to the present invention has a specific gravity of 0. Polypropylene of 92-0°95 is used. In addition, when using it submerged in water, mix calcium carbonate powder with polypropyne to reduce its specific gravity to 1.
〜1,10 Furthermore, the appropriate thickness of each member constituting the biological F material is about 1 to 3 tm0. Furthermore, the element rings 3α, 3b, 3c, etc.
A connecting member 4α that connects the tops of the inverted V-shaped portions.

4b may be one piece each, or three pieces each. 0 When a large number of these biological materials are immersed in water, the expansion part of each element ring 3α#3b13'l... However, because the rib 6 protrudes from the expanded portion and the connecting member 5 is integrated with the outer ring 2 (!), the element rings do not enter into each other. .

Effects of the Invention According to the present invention, despite having a planar structure with a large surface area, the inner and outer rings 1 and 2 and each element ring 3a, 3b, 3c,
The configuration of the constituent parts such as ...... is simplified,
Therefore, biofilm formation is good as well.

The separation of the generated biofilm can be improved. Since the configuration of the trench component members is simple, the shape of the mold is simple, and manufacturing costs can be reduced.

Furthermore, even when a large number of biological materials according to the present invention are placed in water, the biological materials do not intertwine with each other.
It can be used efficiently.

Furthermore, sufficient strength can be obtained for a seaweed that has many thin plate-like members.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is an overall perspective view, FIG. 2 is a plan view, and FIG. 3 is a cross-sectional view taken along the line T1 in FIG.
FIG. 4 is a sectional view taken along the line ■-■ in FIG. 2. 1 is an inner ring, 2 is an outer ring, 3α13b13'l... is an element ring, 4α, 4b, 5 are connecting members, 6 is a lip0

Claims (1)

[Claims] In the annular part between the inner ring 1 and the outer ring 2 which are arranged concentrically,
An even number of thin plate-shaped annular element rings 3α, 3b, 3c, .
... are tilted in opposite directions alternately radially and circumferentially with respect to the axes of the inner and outer rings 1 and 2.
Reduced portions and expanded portions are arranged alternately in the circumferential direction on both sides in the axial direction, and each adjacent element ring 3a, 3b, 3
c, . . ., the top part on the reduction side is connected to a plate-shaped connecting member 4a.
, 4b, and are connected by a plate-shaped connecting member 5 whose outer periphery on the expanding side is integrated with the outer ring 2, and each element ring 3
A biological filter medium characterized in that ribs 6 are provided in the axial direction on the circumferential side surfaces of a, 3b, 3c, .