JPS60251990A - Contact material for water treatment and preparation thereof - Google Patents

Abstract

PURPOSE:To hold a large amount of bacteria in an adhered state, by drawing out untwisted polyvinylidene chloride filaments from the spaces provided to the wound part of an untwisted bundled yarns and forming independent loops from said filaments in a non-bundled state. CONSTITUTION:A plurality of untwisted bundled yarns 2 and polyvinylidene chloride filaments 3 are arranged to the periphery of the core wire material 1 comprising an aluminum alloy or a vinyl chloride pipe in the oblique direction so as to be crossed to each other. The filaments 3 are drawn out from the spaces provided to the wound parts of the bundled yarns and independent loops are formed to the core wire material 1 from said filaments 3 toward the outside in the radial direction in a non-bundled state. Each untwisted bundled yarn are formed by bundling untwisted filaments comprising polyester, polyvinylidene chloride or polypropylene and a plurality of said bundled yarns are used.

Description

[Detailed description of the invention] (1) Purpose of the invention Industrial applications The present invention is a pollution-related prevention technology.

The contact material of the present invention is useful as a contact material for microorganisms to form colonies and adhere to and proliferate in biological treatment of water, particularly in water treatment using the catalytic oxidation method, which is an improved method of the activated sludge method.

BACKGROUND OF THE INVENTION The term ``contact material for water treatment'' used in the present invention refers to a carrier on which microorganisms form colonies, attach, and proliferate in the biological treatment of drinking water, industrial water, sewage, sludge, etc. 1
It is a synonym for "microbial community symbiotic organism" or "electrobiological symbiotic carrier."

The activated sludge method is currently widely used as a biological treatment method for wastewater. The activated sludge method usually consists of four stages: an initial settling tank, an aeration tank, a final settling tank, and return of the activated sludge to the aeration tank.
Consists of stages. The activated sludge method is generally suitable for treating wastewater with a high amount of organic matter, but in order to operate this method successfully, it is necessary to ensure that the microorganisms necessary for purification are appropriately present in the activated sludge and are sufficiently active. be. Furthermore, the activated sludge method requires long aeration times and large amounts of air, and aeration operations account for a large portion of operation and management costs. Therefore, various improvement methods have been developed taking into consideration operational stability, treatment efficiency, difficulty in maintenance and management, economic efficiency, etc.

The contact oxidation method, which is an improved method of the activated sludge method, is a method in which a contact material for immobilizing microorganisms is placed in an aeration tank and aeration is performed. The effects of the contact oxidation method include increasing the amount of microorganisms in the aeration tank, improving treatment efficiency, and reducing the amount of excess sludge because bacteria are eaten by the large number of protozoa that adhere to the contact material. It is. On the other hand, there is a drawback that excessive microorganisms adhere to the contact material, which impairs the flow of the mixed liquid and impedes oxygen transfer. Therefore, an important issue in the catalytic oxidation method is how to select the material, shape, and physical properties of the contact material.

Conventionally, the concept of contact materials used in catalytic oxidation methods is as follows:
Honeycomb-shaped, rod-shaped, wire-shaped, and other deformed plastics have been adopted based on the idea that microorganisms can be attached and retained on a plate-shaped surface, and the more this surface is, the more microorganisms can be attached and retained. This type of surface contact material has the drawback that microorganisms adhere to and fix on the contact material relatively thickly, but if the thickness exceeds a certain level, it may cause clogging or peel off. This requires cumbersome additional processing operations such as limiting the BODil load on the processing equipment or providing a cleaning mechanism for the contact material. Therefore, there has been a desire for a contact material with a new shape and structure that eliminates the drawbacks of conventional contact materials that mainly have such a planar shape.

The present invention provides a novel contact material for water treatment and a method for manufacturing the same.

The present invention provides a contact material used in a catalytic oxidation process that has a larger space volume than conventional contact materials and can therefore attach and retain a larger amount of microorganisms, and a method for producing the contact material.

The present invention provides a contact material used in the catalytic oxidation process of water that does not allow attached and retained microorganisms to peel off or fall off and cause blockage, and a method for producing the contact material.

Furthermore, the present invention eliminates the complicated steps required to manufacture conventional contact materials and the additional steps required when using conventional contact materials.

The problems solved by the present invention will be successively clarified below.

(2) Structure of the Invention Means for Solving Problem 4 The above-mentioned problem can be solved by using a plurality of untwisted bundled yarns and untwisted polyester fibers arranged diagonally around a suitable core wire so as to cross each other. The water treatment method of the present invention is made of a vinylidene chloride filament, and the filament is pulled out from between the wound portions of the bundled yarn, and the filament forms an unbound, independent loop radially outward of the core wire. Solved by using contact material.

The structure of the contact material of the present invention will be explained below.

1 and 2 are side views and radial cross-sectional views of the contact material of the present invention.

As shown in FIG. 1, the contact material of the present invention consists of a plurality of untwisted bundled yarns 2 and polyvinylidene chloride filaments 3 arranged diagonally around a suitable core wire material 10 so as to cross each other. The filaments are pulled out from between the wound portions of the bundled yarn, and each filament forms an unbound, independent loop radially outward of the core wire.

The contact material of the present invention is processed and fixed into a spiral shape, for example, in order to maximize the contact area with the wastewater to be treated. Therefore, the core wire, which is a component of the contact material, is preferably made of a flexible, corrosion-resistant metal, such as an aluminum alloy. However, at the manufacturing stage of the contact material, an arbitrary shape can be formed by inserting an aluminum alloy or the like into the core wire material. It becomes possible to process and fix it.

The untwisted bundled yarn, which is a component of the contact material of the present invention, is a so-called bundled yarn in which a plurality of untwisted filaments of polyester, polyvinylidene chloride, or polypropylene are bundled together, and a plurality of them are used. The untwisted bundled yarn is used to fix the polyvinylidene chloride filament forming the loop to the core wire.

The polyvinylidene chloride filament, which is a component of the contact material of the present invention, is an untwisted filament of 100 to 200 deniers. The polyvinylidene chloride filament is used to form a radial loop around the core wire in the radial direction. The loop has a radial length of contact material of 25 to 30
It is preferable that it be formed to be simple.

To summarize the above, the most preferred embodiment of the contact material provided by the present invention is a plurality of untwisted bundled yarns made of polyester arranged diagonally around the circumference of an aluminum alloy or vinyl chloride pipe so as to cross each other. Consisting of a plurality of untwisted polyvinylidene chloride filaments, the filaments are pulled out from between the wound portions of the bundled yarn, and the filaments are used to extend the core wire outward in the radial direction in an unbound state with an independent length of 11 to 14 fl. This is a contact material for water treatment formed by forming a loop.

The contact material of the present invention includes: (1) feeding the core wire in a straight direction; (2) using a bobbin made by winding polyvinylidene chloride filament and a bobbin made by winding a bundled yarn in guide grooves forming S-shaped curves that intersect with each other; (1) rotating a bobbin wound with polyvinylidene chloride filament and a bobbin formed with a bundled yarn in opposite directions in the S-shaped groove, while causing each bobbin to revolve around the S-shaped groove; (1) winding the polyvinylidene chloride filament and the bundled yarn from the bobbin around the core wire; (2) drawing the polyvinylidene chloride filament radially outward of the core wire at regular intervals to form a loop; (2) Manufactured by a method consisting of fixing the drawn loop to the core wire by means of a binding thread.

The contact material of the present invention is manufactured by substantially the method described above, and the manufacturing method of the present invention will be specifically explained below with reference to the drawings.

FIGS. 3 and 4 are an elevational view and a side view, respectively, of an example of an apparatus used to carry out the manufacturing method of the present invention.

As shown in Figures 3 and 4, a bobbin A is made of a polyvinylidene chloride filament (hereinafter sometimes referred to as 1-loop yarn) wound to form a loop, and a polyester bundled yarn (hereinafter referred to as ``loop yarn'') for fixing the loop. Fixed thread
In some cases, 16 bobbins B each wound with a bobbin B are set on the bobbin moving guide base 6. (A□~, 6 and B in Figure 3 are Bobin people and Bobin people, respectively.
~16 shows the arrangement and ranking of bin B). This base is provided with a bobbin holder (■) and a guide groove (guide rail) that draws an S-shaped curve that intersects with each other. Arrange it so that it revolves within the guide groove. The loop thread wound on the bobbin A and the loop fixed thread wound on the bobbin B1 are tensioned by the tension mechanism θ.
are gathered around the aluminum alloy core wire 5 in red and white colors. The aluminum alloy core wire 5 is pushed up and fed into the core wire guide O by the feeder 1, and its progress can be adjusted as desired, and its position is stabilized by the nozzle 4 in the vicinity of where the loop is formed. A constant position is maintained. Next, the bobbin A1 and the bobbin B1 are guided by guide grooves provided in the bobbin moving guide base, and rotate around each other in S-shaped curves in opposite directions. At this time, the phases of the bobbin AI and the bobbin Bl are changed from the 180° position to the necessary position in order to avoid collision at the intersection point of the S-curve, and the core wire 50 is moved on the bobbin moving base 6 while crossing alternately. The loop thread and loop fixed thread are wound while rotating on the circumference. At this time, the needle pin 2 provided between the bobbin A1 and the bobbin B2 simultaneously moves up and down and moves in a radial direction with respect to the core wire 5, and when the loop yarn reaches that position, the needle pin tip 2' picks it up and cores it. The wire is expanded outward in the radial direction to form a loop and then waited for the required time. At this time, the bobbin A2 has already moved to the position of the next inner bobbin A4. On the other hand, bobbin B2, which is out of phase, revolves and reaches the position of bobbin B4, where the loop thread from bobbin A1 is wound around the outer periphery of the core wire while pressing the contact point with the core wire of the loop formed from above. When the loop yarn is completely pressed by the core wire by the loop fixing yarn, the needle bottle 2 moves downward, thus forming one loop. The length of this loop can be arbitrarily adjusted by adjusting the stroke length of the needle bottle 2 in the radial direction.

By repeating the above operations, eight loops are formed outwardly on the circumference of the core wire. The contact material produced in this manner is recovered by any means. For example, if the core wire is metal, the loop is fixed to the core wire and cut to a required length, and if the core wire is a plastic tube, it is wound up by the winding mechanism 3.

Although the above description has been made based on one embodiment of the manufacturing method of the present invention, various modifications and modifications of the present invention can be considered within the scope of the claims as exemplified below.

The loops formed radially outward at the periphery of the core wire are arbitrarily set by using twice the number of loop yarns and loop fixing yarns as the number of loops desired.

In addition to being pushed upward and fed, the core wire may be fed vertically downward or laterally.

The loop may be fixed to the core wire using only the loop fixing thread, or may be fixed by an equivalent means such as adhesive or heat welding.

When using a soft plastic tube, etc. for the core wire, a plastic tube winding mechanism is provided in the upper, lower, or lateral direction, and the contact material is manufactured in the same way as when using a rigid body such as an aluminum alloy for the core wire. I can do it.

[Brief explanation of drawings]

1 and 2 are a side view and a radial cross-sectional view, respectively, of a contact material of the present invention. FIG. 3 and FIG. 4 are an elevational view and a side view, respectively, of an example of an apparatus for producing silk for the contact material of the present invention. Patent applicant Toyo Jitsugyo Co., Ltd. 1-□゛ Agent Patent attorney Kyozo Yuasa 1-1 (and 5 others) Figure 1 Procedures Amendment Book 1985 Iya λ and Japanese Patent Office Commissioner Uga Michibu Tono 1 case Indication of Patent Application No. 107954 filed in 1982 2 Name of the invention Contact material for water treatment and its manufacturing method Relationship with the case of the person making the amendment Patent applicant address Name Toyo Jitsugyo Co., Ltd. 4th representative Attorney 1, Patent claimant Correct the range as shown below. [(1) Consisting of a plurality of non-flammable bundled threads arranged so as to cross each other in the diagonal direction around the core wire and a non-combustible polyvinylidene chloride filament, the filaments are inserted between the same right portions of the bundled threads. A contact material for water treatment that is formed by drawing out each filament to form an independent loop in an unbound state radially outward of a core wire. (4) A contact material for water treatment comprising a loop formed by a non-flammable polyvinylidene chloride filament extending radially outward around a core wire, and the loop being fixed to the core wire by a non-flammable bundled yarn. A manufacturing method comprising; ■ supplying a core wire in a straight direction; and ■ alternately bobbins made of polyvinylidene chloride filament wound and bobbins made of bundled yarn wound around a guiding structure forming an S-shaped curve that intersects with each other. (1) placing a bobbin (a bobbin wound with polyvinylidene chloride filament 1) and a bobbin (a bobbin with a bundled yarn wound therein) in the S-shaped structure and rotating them in opposite directions, while causing each bobbin to revolve around the S-shaped groove; (2) winding the polyvinylidene chloride filament and the bundled yarn from the bobbin in the radial direction of the core wire at regular intervals; The method comprises drawing out to form a loop; and (1) fixing the drawn out loop to the core wire by means of a binding thread. "that's all

Claims (2)

[Claims] (1) Consisting of a plurality of non-flammable bundled yarns and untwisted polyvinylidene chloride filaments arranged diagonally across the periphery of a core wire, the filaments are pulled out between the wound portions of the bundled yarns. A contact material for water treatment in which each filament forms an independent, unbound loop radially outward of a core wire. (2) Manufacture a contact material for water treatment in which a loop is formed by an untwisted polyvinylidene chloride filament expanding radially outward around a core wire, and the loop is fixed to the core wire by an untwisted bundled yarn. The method includes; ■ supplying the core wire in a straight direction; and ■ alternately bobbins made of polyvinylidene chloride filament wound and bobbins made of bundled yarn wound in guide grooves forming S-shaped curves that intersect with each other. (1) rotating a bobbin wound with polyvinylidene chloride filament and a bobbin wound with bundled yarn in opposite directions in the S-shaped groove; and (2) causing each bobbin to revolve around the S-shaped groove. (2) winding the polyvinylidene chloride filament and the bundled yarn from the bobbin around the core wire; (2) drawing the polyvinylidene chloride filament radially outward of the core wire at regular intervals to form a loop; (2) The method comprises fixing the drawn-out loop to the core wire by means of a binding thread.