JPH0466197A - Contacting material for sewage cleaning and its manufacture - Google Patents

Abstract

PURPOSE:To manufacture a contacting material with high corrosion resistance efficiently at a low cost by putting a large number of coil contacting threads made of non- thermosetting-type resin on a core material of a thermosetting-type resin, twisting the resulting body, and heating it to fix the core material in the twisted condition. CONSTITUTION:A tape-like woven fabric is prepared using fibers of a thermosetting resin and a large number of coil-like contacting threads 2 made of nonthermosetting resin are put on the upper face of it. When the resulting body is put in a bath at about 70-80 deg.C while twisted either rightward or leftward, the contacting threads 2 are extended like a flower-in-water with coil shape. With twisted, the tape-like body 1 becomes a core material 4 and at the same time is hardened by heating to have toughness and thus a contacting material having coil-like contacting threads 2 and suitable for microbe adhesion and propagation is composed. Or while twisted, the tape-like woven fabric 1 on which the contacting threads 2 are put is coiled on a cylinder 5 and by treatment e.g. passing the resulting body in hot water bath, an ideal spiral contacting material which does not return to the original strip body and has high toughness is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a contact material for sewage purification used to purify sewage and a method for manufacturing the same.

[Prior art and its problems] The contact material for sewage treatment disclosed in Japanese Patent Publication No. 56-28199 has an ideal interaction of a much larger number of microorganisms in an adherent growth state than in conventional contact materials. It has an exceptionally high sewage purification rate, and is currently used in many fields, receiving great praise as a contact material that produces extremely little excess sludge.

However, due to gradual advances in science, substrates that corrode metals have been mixed into wastewater, and the contact material of the above publication, in which a contact thread is wound around a core material such as an aluminum wire, does not allow the aluminum wire to be used in the treatment tank. There are concerns about deterioration such as corrosion of metals such as metals.

Furthermore, the contact material disclosed in the above publication is formed by winding a tape-like body provided with many ring-shaped contact threads around an aluminum wire, etc., so the process is complicated and often uneconomical. . Furthermore, in the case of sewage with a high salt content, there is a possibility that the aluminum wire, etc. that forms the core may partially corrode more quickly.

[Problems to be Solved by the Invention] The present invention improves the contact material of the prior art and its manufacturing method as described above, provides a contact material having corrosion resistance, and makes such a contact material efficient and inexpensive. The purpose is to provide a manufacturing method that enables the production of

[Means for Solving the Problem] In order to achieve the above-mentioned object, the present invention includes an elongated core material, and a plurality of elongated core materials attached to the periphery of the core material and extending outward from the core material in the dark radial direction. A contact material for sewage purification comprising a ring-shaped contact thread, wherein the core material is formed of a material that hardens by applying physical or chemical conditions, and the contact thread is It is made from a material that is stable under certain conditions.

As described in claim 2, the core material may be formed from a thermosetting resin, and the contact thread may be formed from a non-thermosetting resin.

Further, according to the present invention, a tape-shaped core material is formed using a substance that hardens by applying physical or chemical conditions, and is placed on the core material to be stable against the physical or chemical conditions. A core material provided with the contact threads is prepared by providing a large number of ring-shaped contact threads, twisting the core material provided with the contact threads, and applying physical or chemical conditions to the twisted core material. Provided is a method for producing a contact material for sewage purification, which fixes the contact material in a twisted state.

As described in claim 4, the substance that hardens by applying the physical or chemical conditions can be a thermosetting resin.

Furthermore, as described in claim 5, by winding the twisted core material around the outer peripheral surface of the cylinder or the like to form a spiral body, and then applying physical or chemical conditions to the spiral body. , the helical shape can be fixed.

[Operations and Effects of the Invention] The present invention not only simplifies the manufacturing process and is economically efficient, but also has a long service life physically and chemically even in wastewater, which is currently required. A contact material is provided that can fully contribute to the economic efficiency of sewage treatment equipment.

[Example] The string-like or spiral-shaped contact material used for sewage purification of the present invention and its manufacturing method will be described in detail below with reference to the drawings.

As illustrated in FIG. A large number of ring-shaped contact threads 2 made of polyvinylidene chloride are provided. This ring-shaped contact yarn 2 is provided together with the fibers constituting the tape-shaped fabric when weaving them.

The tape-shaped fabric (hereinafter referred to as the tape-shaped body) provided with a large number of ring-shaped contact threads is twisted in either the left or right direction as shown in Fig. ~
806C (in a hot water bath), the contact thread attached to the tape-like body shown in FIG. 1 expands in all directions in a ring shape like an underwater flower, as shown in FIG.

The tape-like body 1 is twisted to become a core material 4, hardened by heating to exhibit rigidity, and constitutes a contact material 5 having ring-shaped contact threads and suitable for microbial attachment and proliferation.

Flexible string-like contact materials require a strong frame and are often uneconomical, but since the string-like contact material of the present invention has a rigid core material, it can be easily installed in any treatment tank. can do.

Furthermore, in order to efficiently increase the frequency of contact with the flow of sewage in the treatment tank, a spiral contact material is required, but as shown in FIG. As shown in the figure, by wrapping it around a cylinder 5 of the required diameter and passing it through a hot water bath in the wrapped state as described above, the above-mentioned rigid string-like body does not return to its original shape. An ideal spiral contact material as shown in FIG. 5 is obtained.

The tape-shaped body used in the present invention is not limited to a simple thermosetting resin, but any substance that can be cured by physical or chemical treatment can be used. Further, a tape-like film-like thermosetting resin can also be used, and the processing temperature can also be changed depending on the required processing speed.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a tape-like body having a large number of contact threads, Fig. 2 is a perspective view showing the process of twisting the tape-like body shown in Fig. 1, and Fig. 3 is a perspective view showing the process of twisting the tape-like body shown in Fig. FIG. 4 is a perspective view of a contact material formed by fixing a tape-shaped body in a twisted state, FIG. 4 is a perspective view showing a state in which the tape-shaped body is wound around a cylinder, and FIG. FIG. 3 is a perspective view of the contact material of FIG. 1... Tape-shaped body, 2... Ring-shaped contact thread, 3... Contact material, 4... Core material. (4 other people) No. 31￥7 Fig. 4

Claims (1)

[Claims] 1. A contact material for sewage purification comprising an elongated core material and a plurality of ring-shaped contact threads attached around the core material and extending approximately radially outward from the core material. characterized in that the core material is made of a material that hardens when subjected to physical or chemical conditions, and the contact thread is made of a material that is stable to the physical or chemical conditions. Contact material for sewage purification. 2. The contact material for sewage purification according to claim 1, wherein the core material is made of a thermosetting resin, and the contact thread is made of a non-thermosetting resin. 3. A tape-shaped core material is formed using a substance that hardens by applying physical or chemical conditions, and a large number of ring-shaped contacts that are stable against the physical or chemical conditions are formed on the core material. By providing a thread, twisting the core material provided with the contact thread, and applying physical or chemical conditions to the twisted core material, the core material provided with the contact thread is fixed in a twisted state. 1. A method for producing a contact material for sewage purification, characterized by: 4. The manufacturing method according to claim 3, wherein the substance that is cured by applying physical or chemical conditions is a thermosetting resin. 5. Wrap the twisted core material around the outer peripheral surface of the same cylinder to form a spiral body, and then fix the spiral shape by applying physical or chemical conditions to the spiral body. The manufacturing method according to claim 3 or 4, characterized in that: