JP5917141B2 - Biological treatment contact material - Google Patents

Biological treatment contact material Download PDF

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JP5917141B2
JP5917141B2 JP2011288093A JP2011288093A JP5917141B2 JP 5917141 B2 JP5917141 B2 JP 5917141B2 JP 2011288093 A JP2011288093 A JP 2011288093A JP 2011288093 A JP2011288093 A JP 2011288093A JP 5917141 B2 JP5917141 B2 JP 5917141B2
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yarn
contact material
activated sludge
twisted
wastewater
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JP2013136021A (en
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多加史 笈田
多加史 笈田
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Seiren Co Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Description

本発明は、被処理排水中に浸漬されると共に、付着活性汚泥により前記排水を処理するための生物学的処理用接触材に関する。 The present invention relates to a biological treatment contact material that is immersed in the wastewater to be treated and that treats the wastewater with the attached activated sludge.

家庭排水や工場排水などの、下水・排水処理方法として、排水処理施設において微生物処理による標準活性汚泥法と呼ばれる方法が用いられている。しかし、処理施設の敷地面積および処理槽容量には限界があるため、処理槽内において高い活性汚泥濃度が保持できずに処理時間が長くなったり、BOD、COD、水量、汚泥濃度やpH等の負荷変動に対する処理の安定性に問題がある。
これらの問題を解決するために、処理槽内の活性汚泥濃度を高めて、且つ活性汚泥の滞留時間を増大させることが求められ、「担体利用処理法」や「固定床型生物膜法」が開発されてきた。
これらの方法は、処理槽である曝気槽内部の被処理排水中に種々の接触材を浸漬・配置させるものであり、被処理排水中の接触材に活性汚泥が付着し、この活性汚泥が被処理排水中の有機物などを分解することで、水処理が行われる。この方法では、増殖の遅い微生物でも流されにくく、接触材に大量の活性汚泥が付着し、見かけ上、処理槽内の活性汚泥濃度が高められる。
As a sewage / wastewater treatment method such as household wastewater and factory wastewater, a method called a standard activated sludge method by microbial treatment is used in wastewater treatment facilities. However, because there is a limit to the treatment facility site area and treatment tank capacity, it is impossible to maintain a high activated sludge concentration in the treatment tank, resulting in longer treatment time, BOD, COD, water volume, sludge concentration, pH, etc. There is a problem in the stability of processing against load fluctuations.
In order to solve these problems, it is required to increase the activated sludge concentration in the treatment tank and increase the residence time of the activated sludge, and the “support utilizing treatment method” and “fixed bed type biofilm method” are required. Has been developed.
In these methods, various contact materials are immersed and disposed in the wastewater to be treated inside the aeration tank, which is a treatment tank. Activated sludge adheres to the contact material in the wastewater to be treated, and this activated sludge is covered. Water treatment is performed by decomposing organic matters in the treated waste water. In this method, even slow-growing microorganisms are not easily washed away, and a large amount of activated sludge adheres to the contact material, and apparently the activated sludge concentration in the treatment tank is increased.

このような接触材としては、従来、板状または立体形状のプラスチック成形品を利用したものが知られている。しかし、これらの接触材は、接触材表面に凹凸が少なく表面積が小さいため、活性汚泥が付着しにくく、また、活性汚泥が付着しても剥離しやすいという欠点があり、接触材に曝気や流水などによる乱流が加わると、付着していた活性汚泥が一斉に剥離して、水質変動が起こるため、安定して効率よく水処理することが難しいという問題があった。 As such a contact material, a material using a plate-shaped or three-dimensional plastic molded product is conventionally known. However, since these contact materials have less irregularities on the contact material surface and a small surface area, activated sludge is difficult to adhere, and even if activated sludge is adhered, there is a drawback that the contact material is easily peeled off. When the turbulent flow is applied, the attached activated sludge is peeled off at the same time, and the water quality is changed. Therefore, there is a problem that it is difficult to perform the water treatment stably and efficiently.

そこで、このような問題を解決するために、接触材として、モノフィラメント糸からなる不織布や織物を用いたものが開発されたり、特許文献1には、活性汚泥を付着させる部分に仮撚加工糸などの捲縮糸やマルチフィラメント糸を用いた接触材が開示されている。これは、捲縮糸やマルチフィラメント糸を用いることで接触材表面に凹凸を形成し、接触材の表面積を増やすことにより、活性汚泥の付着量を増加させることを目的とするものであるが、捲縮加工糸をそのまま用いても、水流によって糸条に負荷がかかり、捲縮が伸びてしまい、活性汚泥が剥離しやすくなって、活性汚泥を十分に付着保持することができないおそれがある。 Therefore, in order to solve such a problem, as a contact material, one using a nonwoven fabric or a woven fabric made of monofilament yarn has been developed, or in Patent Document 1, false twisted yarn is attached to a portion to which activated sludge is attached. Contact materials using crimped yarns or multifilament yarns are disclosed. This is intended to increase the amount of activated sludge by forming irregularities on the contact material surface by using crimped yarn and multifilament yarn, and increasing the surface area of the contact material, Even if the crimped yarn is used as it is, a load is applied to the yarn by the water flow, the crimp is stretched, the activated sludge is easily peeled off, and the activated sludge may not be sufficiently adhered and held.

また、特許文献2には、通常繊維と熱収縮繊維と熱融着繊維とを混紡した糸材を熱処理した構成の排水の生物処理用の接触材が開示されている。この接触材は、混紡された糸材中の熱収縮繊維が熱処理されることで収縮し、該糸材が嵩高となって細かな空隙が多く作られることにより、活性汚泥の付着性を向上させている。しかし、この接触材は、被処理水中で長期に渡って曝気等による乱流にさらされると、短繊維が脱落していわゆる糸の痩せが発生し、汚泥を担持する空隙や表面積が減少するため、汚泥が剥離して処理性能が低下するおそれがある。また、短繊維が脱落することで、排水中に余計な懸濁物質(SS)を放出するおそれがある。 Further, Patent Document 2 discloses a contact material for biological treatment of wastewater having a structure in which a yarn material obtained by mixing ordinary fibers, heat-shrinkable fibers, and heat-bonding fibers is heat-treated. This contact material shrinks when heat-shrinkable fibers in the blended yarn material are heat-treated, and the yarn material becomes bulky and many fine voids are created, thereby improving the adhesion of activated sludge. ing. However, when this contact material is exposed to turbulent flow due to aeration for a long time in the water to be treated, the short fibers fall off, so-called thread thinning occurs, and the voids and surface area supporting sludge decrease. The sludge may peel off and the processing performance may be reduced. Moreover, there is a possibility that extra suspended solids (SS) may be released into the waste water due to the short fibers falling off.

さらに、特許文献3には、微生物を固定可能な複数の繊維によって構成された固定糸によって接触材が構成され、前記固定糸は、その中心側ほど前記繊維の存在密度および汚泥の付着力が高く、外側ほど存在密度及び汚泥の付着力が低いように構成された生物処理用の接触材が開示されている。このような構成をとることにより、固定糸の中心部に所定量の汚泥が確実に付着した状態で、固定糸の表面側に付着した汚泥のみが積極的な剥離作用により僅かずつ剥離しかつ脱落して、固定糸全体につき常に過不足のない適度な汚泥付着量になるとともに、一度に大量剥離することによる水質の変動が防止されるとしているが、この構成では、固定糸中心部では十分な量の汚泥の進入保持ができず、その結果汚泥の成長や入れ替わりが見込めないおそれがある。また、固定糸の中心部では、酸素が供給される機会が少なく、好気性微生物群からなる汚泥の性能が十分発揮されないおそれがある。 Further, in Patent Document 3, a contact material is constituted by a fixing yarn composed of a plurality of fibers capable of fixing microorganisms, and the fixing yarn has a higher density of fibers and a sludge adhesion force toward the center side thereof. In addition, a biological treatment contact material configured such that the outer density and the adhesion of sludge are lower toward the outside is disclosed. By adopting such a configuration, only a sludge adhering to the surface side of the fixed yarn is peeled off little by little by a positive peeling action while a predetermined amount of sludge is securely attached to the center of the fixed yarn. In addition, while it is said that the amount of sludge adhering to the entire fixed yarn will always be an appropriate amount of sludge, and fluctuations in water quality due to large-scale peeling at one time are prevented, this structure is sufficient at the center of the fixed yarn There is a risk that the amount of sludge cannot be kept in, and as a result, the growth and replacement of sludge cannot be expected. Moreover, there is little opportunity for oxygen to be supplied at the center portion of the fixed yarn, and there is a possibility that the performance of sludge composed of aerobic microorganisms may not be sufficiently exhibited.

特開昭58−202092号公報JP 58-202092 A 特開平05−92196号公報Japanese Patent Laid-Open No. 05-92196 特許第2944636号Japanese Patent No. 2944636

本発明は、このような従来の接触材の問題点を鑑みなされたもので、糸条の嵩高性を保持したまま、付着活性汚泥量が向上し、且つ、付着した活性汚泥が一斉に剥離しにくい接触材を提供することを目的とする。   The present invention has been made in view of the problems of such conventional contact materials, and the amount of attached activated sludge is improved while maintaining the bulkiness of the yarn, and the attached activated sludge is peeled off at the same time. The object is to provide a contact material that is difficult to contact.

すなわち、本発明は、(1)被処理排水中に浸漬させると共に、付着活性汚泥により前記排水を処理する生物学的接触材であって、合成繊維のマルチフィラメントからなるタスラン加工糸を20〜60T/mの合撚数で複数本合撚した糸条を少なくとも一部に用いてなり、合撚糸が熱融着糸を含むことを特徴とする生物学的処理用接触材である
また、(2)合撚糸の総繊度が、7000〜15000デシテックスである(1)に記載の生物学的処理用接触材である。
また、(3)被処理排水中に浸漬させると共に、付着活性汚泥により前記排水を処理する生物学的接触材であって、合成繊維のマルチフィラメントからなるタスラン加工糸を20〜60T/mの合撚数で複数本合撚した糸条を少なくとも一部に用いてなり、合撚糸の中心部では、繊維密度が密な部分に囲まれた空隙部が存在し、その外周には繊維密度が密な部分と疎な部分が混在する部分が形成されることを特徴とする生物学的処理用接触材である。
The present invention provides: (1) together are immersed in the raw wastewater, a biological contact materials for processing the waste water due to the adhesion activated sludge, the Tasuran yarn consisting of a multifilament of synthetic fiber 20~60T / a yarn in which a plurality Hongo twisted in a total number of twists of m Ri Na using at least a portion, folded and twisted yarn is a biological treatment for contact material, characterized in that it comprises a thermal fusion yarn.
(2) The biological treatment contact material according to (1) , wherein the total fineness of the twisted yarn is 7000 to 15000 dtex.
Also, (3) a biological contact material that is immersed in the wastewater to be treated and treated with adhering activated sludge, and a Taslan processed yarn made of synthetic multifilaments is combined at 20-60 T / m. A plurality of twisted yarns are used for at least a part of the yarn. At the center of the twisted yarn, there is a void surrounded by a dense fiber density, and the outer periphery has a dense fiber density. The biological treatment contact material is characterized in that a portion in which a small portion and a sparse portion are mixed is formed.

本発明の生物学的処理用接触材は、被処理排水中に浸漬されるとともに、付着活性汚泥により前記排水を処理させる接触材に、タスラン加工糸を複数本合撚した構造の糸材を用いるため、接触材が嵩高となるうえに、細かな空隙が多く作られることにより接触材の表面積が大きくなり、活性汚泥の付着性を著しく向上させることができ、接触材と活性汚泥との間の付着強度が大きくなって付着活性汚泥の一斉剥離の発生を低減できるため高負荷処理が可能となる。
また、合成繊維のマルチフィラメントからなるタスラン加工糸を用いているので、接触材を排水中に浸漬させ、曝気やそれに伴う乱流に曝されても、繊維の脱落による活性汚泥の剥離はほとんど無い。
また、合撚したタスラン加工糸は、断面形状で略円柱状になり合撚糸の剛性が適度に上がるので、曝気や乱流などによる異常揺動が抑えられ、活性汚泥の一斉剥離を抑えることができる。
The biological treatment contact material of the present invention uses a yarn material having a structure in which a plurality of Taslan processed yarns are twisted as a contact material that is immersed in the wastewater to be treated and treated with the attached activated sludge. Therefore, the contact material becomes bulky, and the surface area of the contact material is increased by creating a lot of fine voids, so that the adhesion property of the activated sludge can be remarkably improved. Since the adhesion strength is increased and the occurrence of simultaneous peeling of the adhered activated sludge can be reduced, a high load treatment is possible.
Also, since Taslan processed yarn made of synthetic filament multifilament is used, even if the contact material is immersed in waste water and exposed to aeration and turbulent flow, there is almost no peeling of activated sludge due to fiber dropping. .
In addition, the twisted Taslan processed yarn has a substantially cylindrical shape in cross section and the rigidity of the twisted yarn is increased moderately, so that abnormal swinging due to aeration or turbulence can be suppressed, and simultaneous sludge removal can be suppressed. it can.

本発明の生物学的処理用接触材に用いるタスラン加工糸を3本合撚した合撚糸の概略断面図である。It is a schematic sectional drawing of the twisted yarn which twisted three Taslan processed yarn used for the contact material for biological treatments of this invention. 地編の組織図例である。It is an example of the organization chart of a ground part. 合撚糸を用いた接触材の概略図である。It is the schematic of the contact material using a twisted yarn. 合撚糸を切断した接触材の概略図である。It is the schematic of the contact material which cut | disconnected the twisted yarn.

タスラン加工糸を構成する芯糸および浮き糸は、合成繊維のマルチフィラメントのレギュラー糸や仮撚加工糸を用いることが好ましい。また、これら合成繊維の断面形状としては、丸断面の他、異形断面糸を用いることで、活性汚泥付着量を向上させることができる。
また、これらの合成繊維としては、ポリエステル、ポリプロピレン、ナイロン、塩化ビニリデン、ビニロン、ポリ乳酸、アクリル等が挙げられるが、排水中に浸漬することを考慮すると、耐久性、耐腐食性があり、引張強度が高く、伸度が低く、安価である点で、ポリエステル繊維が好ましい。
タスラン加工糸を構成する芯糸や浮き糸に用いる繊維の総繊度は100〜350デシテックスが好ましい。100デシテックスより細いと、活性汚泥の付着安定性が損なわれたり、活性汚泥付着時や接触材を処理槽外に出した時に破断するおそれがあり、350デシテックスより太いとタスラン加工性が低下するおそれがある。
As the core yarn and the floating yarn constituting the taslan yarn, it is preferable to use a multifilament regular yarn or false twisted yarn of synthetic fiber. Moreover, as a cross-sectional shape of these synthetic fibers, the amount of activated sludge adhesion can be improved by using an irregular cross-section thread other than a round cross section.
In addition, examples of these synthetic fibers include polyester, polypropylene, nylon, vinylidene chloride, vinylon, polylactic acid, and acrylic. However, considering that they are immersed in waste water, they have durability and corrosion resistance. Polyester fibers are preferred because of their high strength, low elongation, and low cost.
The total fineness of the fibers used for the core yarn and the floating yarn constituting the taslan processed yarn is preferably 100 to 350 dtex. If it is thinner than 100 dtex, the adhesion stability of activated sludge may be impaired, or when activated sludge adheres or when the contact material is taken out of the treatment tank, it may break, and if it is thicker than 350 dtex, the taslan processability may be reduced. There is.

タスラン加工は、芯糸に0〜15%、浮き糸には15〜300%のオーバーフィードをかけながら走行させ、加圧空気流体処理を行うことにより製造され、浮き糸が加工糸表面のループを形成する。
浮き糸のオーバーフィードを芯糸のオーバーフィードより10〜70%高くかけることが好ましく、20〜50%高くかけることがより好ましい。芯糸のオーバーフィード率と浮き糸のオーバーフィード率の差が10%より小さいと、浮き糸によるループや弛み、毛羽が小さく、接触材に用いた際に十分な嵩高性が得られないおそれがある。また、70%より大きいと、浮き糸によるループやタルミが大きくなりすぎ、接触材としての織物や編物に形成する際の生産性が低下する原因となる。
Taslan processing is produced by running with overfeed of 0 to 15% on the core yarn and 15 to 300% on the floating yarn and performing a pressurized air-fluid treatment. The floating yarn creates a loop on the surface of the processed yarn. Form.
The floating yarn overfeed is preferably applied 10 to 70% higher than the core yarn overfeed, and more preferably 20 to 50% higher. If the difference between the overfeed rate of the core yarn and the overfeed rate of the floating yarn is less than 10%, loops, slack, and fluff due to the floating yarn are small, and there is a risk that sufficient bulkiness may not be obtained when used as a contact material. is there. On the other hand, if it is more than 70%, the loops and talmi caused by the floating yarn become too large, which causes a decrease in productivity when forming the woven fabric or knitted fabric as the contact material.

タスラン加工糸を複数本合撚する際の条件としては、S撚りZ撚りどちらの方向で合撚しても問題ないが、合撚数は20〜60T/mが好ましい。撚数が20T/mより少なくなると使用中に合撚糸がばらけて、活性汚泥が付着しにくくなったり、一度に大量剥離するおそれがある。また、撚数が60T/mより多いと、合撚糸が締ることにより、タスラン加工糸同士が密着しすぎて活性汚泥が合撚糸の空隙部に流入しにくくなったり、また空隙部そのものが小さくなったり、合撚糸の嵩高性が損なわれるので、活性汚泥が保持されにくく、活性汚泥の付着性が悪くなる。 As conditions for twisting a plurality of Taslan processed yarns, there is no problem even if twisting is performed in either direction of S twisting or Z twisting, but the number of twisting is preferably 20 to 60 T / m. If the number of twists is less than 20 T / m, the twisted yarns may be scattered during use, making it difficult for the activated sludge to adhere or peeling off a large amount at a time. On the other hand, if the number of twists is more than 60 T / m, the twisted yarn is tightened so that the Taslan processed yarns are too close to each other, making it difficult for the activated sludge to flow into the void of the twisted yarn. Since the bulkiness of the twisted yarn is impaired, the activated sludge is hardly retained, and the adhesion of the activated sludge is deteriorated.

また、タスラン加工する際にタスラン加工糸を構成する芯糸及び浮き糸に熱融着糸を併用したり、タスラン加工糸同士を合撚する際に熱融着糸を加えて合撚することが好ましい。熱融着糸を用いることにより、合撚後の熱処理で熱融着糸が溶融し、タスラン加工により形成されたループやタルミが溶融固定されるため、被処理排水中で曝気やそれに伴う乱流に曝されても、ループやたるみが減少したり解けたりせず、また、タスラン加工糸同士のばらけを防止し、合撚糸の剛性を上げることができる。その結果、この様な合撚糸を用いた接触材は、曝気や乱流などにより発生する異常揺動が低減され、活性汚泥の一斉剥離を抑えることができる。 In addition, when performing taslan processing, it is possible to use a heat fusion yarn in combination with the core yarn and the floating yarn constituting the taslan yarn, or to add a heat fusion yarn when twisting the taslan yarns to twist them together. preferable. By using heat fusion yarn, the heat fusion yarn is melted by heat treatment after twisting, and loops and tarmi formed by Taslan processing are melted and fixed. Even when exposed to, the loop and sagging will not be reduced or unraveled, and the taslan yarns can be prevented from falling apart and the rigidity of the twisted yarn can be increased. As a result, in the contact material using such a twisted yarn, abnormal swinging caused by aeration or turbulent flow is reduced, and simultaneous release of activated sludge can be suppressed.

用いられる熱融着糸としては、例えば、ポリオレフィン系、ポリエステル系、ナイロン系、ビニロン系や塩化ビニリデン系などの熱融着糸が挙げられ、特に限定されるものではなく、タスラン加工糸を構成する熱融着糸以外の合成繊維の種類、熱処理温度や繊度などに応じて適宜選択することができる。
また、熱融着糸の総繊度は100〜200デシテックスが好ましい。100デシテックスより細いと合撚糸のばらけを十分防止できないおそれがあり、200デシテックスより太いと合撚糸の空隙部の減少や嵩高性が損なわれ活性汚泥の付着性が低下するおそれがある。
Examples of the heat-sealing yarn used include polyolefin-based, polyester-based, nylon-based, vinylon-based and vinylidene chloride-based heat-sealing yarns, and are not particularly limited. It can be appropriately selected according to the type of synthetic fiber other than the heat-sealing yarn, the heat treatment temperature, the fineness, and the like.
Further, the total fineness of the heat-sealing yarn is preferably 100 to 200 dtex. If it is thinner than 100 dtex, it may not be possible to sufficiently prevent the twisted yarn from being scattered. If it is thicker than 200 dtex, the reduction in the voids and bulkiness of the twisted yarn may be impaired, and the adhesion of activated sludge may be reduced.

合撚するタスラン加工糸の本数は3〜5本が好ましく、タスラン加工糸を複数本合撚して構成される合撚糸の総繊度は、7000〜15000デシテックスであることが好ましく、7500〜14000デシテックスであることがより好ましい。合撚糸の総繊度が7000デシテックスより小さいと、充分な表面積を確保し難くなり、活性汚泥の付着量が少なくなる傾向にある。15000デシテックスより大きいと、接触材として織物や編物に成形する際、張力(テンション)が大きくなるため織機や編機自体に負荷がかかり、接触材の生産性効率が低下するおそれが生じる。 The number of taslan processed yarns to be twisted is preferably 3 to 5, and the total fineness of the twisted yarn formed by laying a plurality of taslan processed yarns is preferably 7000 to 15000 dtex, and 7500 to 14000 dtex. It is more preferable that When the total fineness of the twisted yarn is smaller than 7000 dtex, it is difficult to secure a sufficient surface area and the amount of activated sludge tends to be reduced. When it is larger than 15000 dtex, when forming a woven fabric or a knitted fabric as a contact material, a tension is increased, so that a load is applied to the loom or the knitting machine itself, which may reduce the productivity of the contact material.

この様に構成された合撚糸は、生物学的処理用の接触材として用いられる織編物の少なくとも一部に用いることができ、例えば、図3に示すように、接触材において緯挿入糸として用いることができる。更に、図4に示すように、緯挿入糸を地編と地編との間で切断して用いることができる。切断された多数の緯挿入糸は、地編の間に突出し、排水中などで揺動可能となる。この接触材を排水処理設備等の処理槽内に設置する場合、紐状あるいは網目状になった接触材を、一定間隔で適当な添え布に当てがい、この添え布とともに該接触材の両端を筒状に縫製糸により縫製して枠体への取付部を一対形成する。このとき、接触材をねじるなど変形させ使用してもよい。この取付部は、その両端が開口しており、ここにパイプなどを通して処理槽内に固定する。 The thus formed twisted yarn can be used as at least a part of a woven or knitted fabric used as a contact material for biological treatment. For example, as shown in FIG. 3, it is used as a weft insertion yarn in a contact material. be able to. Furthermore, as shown in FIG. 4, the weft insertion yarn can be used by cutting between the ground knitting and the ground knitting. A large number of cut weft insertion yarns protrude between the ground stitches and can swing in the drainage or the like. When this contact material is installed in a treatment tank of a wastewater treatment facility or the like, a contact material in the form of a string or mesh is applied to a suitable attachment cloth at regular intervals, and both ends of the contact material are attached together with this attachment cloth. A pair of attachment portions to the frame is formed by sewing with a sewing thread in a cylindrical shape. At this time, the contact material may be deformed and used. Both ends of the mounting portion are open, and are fixed in the treatment tank through pipes or the like.

このように、上述の合撚糸を用いた本発明の接触材は、活性汚泥の付着安定性を向上させることができる。更に、接触材の強度を高めることができるため、フロック化した活性汚泥が付着しすぎた場合の接触材を洗浄する際に接触材を処理槽から出した場合でも、接触材が破断するなどの損傷を低減することができる。 Thus, the contact material of the present invention using the above-described twisted yarn can improve the adhesion stability of activated sludge. Furthermore, since the strength of the contact material can be increased, even if the contact material is taken out of the treatment tank when cleaning the contact material when the activated sludge flocked is excessively adhered, the contact material may break. Damage can be reduced.

さらに、本発明に用いる合撚糸は、上述のようにタスラン加工糸を複数本合撚した構造であるため、合撚糸の中心部では、繊維密度が密な部分に囲まれた空隙部が存在し、その外周には繊維密度が密な部分と疎な部分が混在する部分が形成された構造になり、更に、合撚糸外周面には嵩高のループが多数形成され外周に向かって繊維密度が疎になる構造であるため、活性汚泥が合撚中心の空隙部に入り込み成長することで大量に保持され、更に、その周囲から外周に向かって、ランダムに汚泥が付着するように構成されているので、一定量の活性汚泥を保持した上で、周囲の活性汚泥が適度に剥離、再付着、成長する、排水処理性能の高い排水環境に順応しやすい生物学的処理用接触材が提供できる。
また、合撚したタスラン加工糸は、断面形状で略円柱状になるため、合撚糸の剛性が適度に上がるため、曝気や乱流などによる異常揺動が抑えられ、活性汚泥の一斉剥離を抑えることができる。また、微生物環境が好気、嫌気と多様性をもつため生物学的脱窒、脱リンの機能が付加されるなど処理効率が向上する。
Furthermore, since the twisted yarn used in the present invention has a structure in which a plurality of Taslan processed yarns are twisted as described above, there is a void portion surrounded by a dense portion of the fiber density at the center of the twisted yarn. The outer periphery has a structure in which a portion where the fiber density is dense and a portion where the fiber density is mixed is formed.Furthermore, many bulky loops are formed on the outer peripheral surface of the twisted yarn, and the fiber density decreases toward the outer periphery. Because the structure becomes, activated sludge enters the gap in the center of the twisted twist and grows and is retained in a large amount, and further, it is configured so that the sludge adheres randomly from the periphery to the outer periphery. In addition, it is possible to provide a biological treatment contact material that can easily adapt to a wastewater environment with high wastewater treatment performance in which a certain amount of activated sludge is retained and the surrounding activated sludge is appropriately separated, reattached, and grown.
In addition, since the twisted Taslan processed yarn has a substantially cylindrical shape in cross section, the rigidity of the twisted yarn is increased moderately, so abnormal swinging due to aeration and turbulent flow is suppressed, and simultaneous sludge separation is suppressed. be able to. In addition, since the microbial environment is aerobic, anaerobic, and diverse, biological denitrification and dephosphorization functions are added to improve processing efficiency.

本発明を実施例により具体的に説明するが、本発明は斯かる実施例に限定されるものではない。 EXAMPLES The present invention will be specifically described with reference to examples, but the present invention is not limited to such examples.

排水処理能力(TOC値)評価
図4に示すように、接触材を合撚糸1本あたりの長さが10cmになるようにカットし、25cm長さの紐状にした。その後、接触材2セットずつを、曝気槽を4つに区切ったそれぞれの区画にセットし、MLSS(曝気槽混合液中の活性汚泥浮遊物)が約8000mg/Lである活性汚泥5Lずつを投入した。なお曝気槽内区画の容積は約7.5Lとした。各区画内に、曝気装置を設置し、溶存酸素量を約5mg/Lに設定し、常温にて6日間曝気した。その後、汚泥が付着した各接触材を引き上げ、曝気槽内の排水をすべて廃棄した後、空の曝気槽に、活性汚泥が付着した各接触材をセットした。その後、新たに、MLSSが約8000mg/Lである活性汚泥5Lずつを投入し、TOC(全有機炭素量)の経日変化を測定した。
活性汚泥付着量及び付着外観
排水処理能力評価終了後、各接触材を曝気槽から引き上げ、ついで、105℃で24時間乾燥させて、活性汚泥付着量を測定した。また、付着外観についても目視で観察した。
Wastewater treatment capacity (TOC value) evaluation As shown in FIG. 4, the contact material was cut so that the length per one twisted yarn was 10 cm to form a 25 cm long string. After that, 2 sets of contact materials are set in each section divided into 4 aeration tanks, and 5 L of activated sludge each having MLSS (activated sludge suspended matter in the aeration tank mixture) of about 8000 mg / L is added. did. The volume of the compartment in the aeration tank was about 7.5L. An aeration apparatus was installed in each compartment, the dissolved oxygen amount was set to about 5 mg / L, and aeration was performed at room temperature for 6 days. Thereafter, each contact material to which sludge adhered was pulled up, and all the waste water in the aeration tank was discarded. Then, each contact material to which activated sludge adhered was set in an empty aeration tank. Thereafter, 5 L of activated sludge having an MLSS of about 8000 mg / L was newly added, and the daily change in TOC (total organic carbon content) was measured.
After completion of the evaluation of the activated sludge adhesion amount and attached appearance drainage treatment capacity, each contact material was pulled up from the aeration tank and then dried at 105 ° C. for 24 hours to measure the activated sludge adhesion amount. The appearance of adhesion was also observed visually.

(実施例1)
タスラン加工糸の芯糸として、ベルカップル(登録商標)167デシテックス、16フィラメント(ポリエステル熱融着糸、KBセーレン株式会社製)3本と、167デシテックス、48フィラメントのポリエステルレギュラー糸3本、及び、167デシテックス、48フィラメントの1ヒータポリエステル仮撚加工糸2本を引き揃え芯糸とした。ポリエステルを引き揃えた。また、浮き糸として、ベルカップル(登録商標)167デシテックス、16フィラメント(ポリエステル熱融着糸、KBセーレン株式会社製)1本と、167デシテックス、48フィラメントのポリエステルレギュラー糸2本、及び、167デシテックス、48フィラメントの1ヒータポリエステル仮撚加工糸1本を引き揃え、浮き糸とした。
芯糸7%、浮き糸50%のオーバーフィード率にて、タスラン加工を行い、タスラン加工糸を得た。
このタスラン加工糸3本を60T/mで合撚し、20%のオーバーフィードをかけながら180℃で熱処理を行い、合撚糸を得た。
また、緯糸挿入ラッシェル機を用いて、図2に示す編立設計にて地編を編成した。地編を構成する糸として、84デシテックス、36フィラメント、強度4cN/デシテックスのポリエステル糸を用い、補強糸として、1100デシテックス、96フィラメント、7.9cN/デシテックスのポリエステル糸を、地編1ウェルに対して、4本挿入した。
また、緯挿入糸として、前記合撚糸を4コース(5mm)おきに挿入し、1つの地編の幅を10mm、地編同士の間隔を90mmとした。180℃で熱処理し、接触材を得た。評価結果を表1に示す。
Example 1
As the core yarn of Taslan processed yarn, three Belcouple (registered trademark) 167 dtex, 16 filaments (polyester heat-sealed yarn, manufactured by KB Selen Co., Ltd.), 167 dtex, 48 regular polyester filaments of 48 filaments, and Two 167 decitex, 48 filament, 1 heater polyester false twisted yarns were aligned and used as core yarns. Polyester was arranged. In addition, as a floating yarn, Belcouple (registered trademark) 167 dtex, one 16 filament (polyester heat-sealing yarn, manufactured by KB Selen Co., Ltd.), 167 dtex, two 48 filament regular polyester yarns, and 167 dtex One heater polyester false twisted yarn of 48 filaments was aligned and used as a floating yarn.
Taslan processing was performed at an overfeed rate of 7% core yarn and 50% floating yarn to obtain a taslan processed yarn.
Three taslan yarns were twisted at 60 T / m and heat-treated at 180 ° C. while applying 20% overfeed to obtain a twisted yarn.
Further, using a weft insertion Raschel machine, a ground knitting was knitted by the knitting design shown in FIG. As a yarn constituting the ground knitting, a polyester yarn of 84 dtex, 36 filaments, strength 4 cN / dtex is used, and as a reinforcing yarn, a polyester yarn of 1100 dtex, 96 filaments, 7.9 cN / dtex is used for one well of the ground knitting. 4 were inserted.
Further, as the weft insertion yarn, the twisted yarn was inserted every 4 courses (5 mm), the width of one ground knitting was 10 mm, and the distance between the ground knittings was 90 mm. Heat treatment was performed at 180 ° C. to obtain a contact material. The evaluation results are shown in Table 1.

(実施例2)
タスラン加工糸の芯糸として、ベルカップル(登録商標)167デシテックス、16フィラメント(ポリエステル熱融着糸、KBセーレン株式会社製)3本、167デシテックス、48フィラメントのポリエステルレギュラー糸3本、及び、167デシテックス、48フィラメントの1ヒータポリエステル仮撚加工糸4本を引き揃え芯糸とした。また、浮き糸として、ベルカップル(登録商標)167デシテックス、16フィラメント(ポリエステル熱融着糸、KBセーレン株式会社製)を1本、167デシテックス、48フィラメントのポリエステルレギュラー糸2本、及び、167デシテックス、48フィラメントの1ヒータポリエステル仮撚加工糸1本を引き揃え、浮き糸とした。
芯糸7%、浮き糸50%のオーバーフィード率にてタスラン加工を行い、タスラン加工糸を得た。こ
のタスラン加工糸4本を60T/Mで合撚し、20%のオーバーフィードをかけながら180℃で処
理を行い、合撚糸を得た。
その後、この合撚糸を緯挿入糸として用いて、実施例1と同様に加工して、接触材を得た。評価結果を表1に示す。
(Example 2)
As the core yarn of Taslan processed yarn, Belcouple (registered trademark) 167 dtex, three 16 filaments (polyester heat-sealed yarn, manufactured by KB Selen Co., Ltd.), 167 dtex, three 48 filament polyester regular yarns, and 167 Four decitex, 48-filament, 1 heater polyester false twisted yarns were aligned and used as core yarns. In addition, as a floating yarn, Belcouple (registered trademark) 167 dtex, 16 filaments (polyester heat-sealed yarn, manufactured by KB Selen Co., Ltd.), 167 dtex, 48 48-filament polyester regular yarns, and 167 dtex One heater polyester false twisted yarn of 48 filaments was aligned and used as a floating yarn.
Taslan processing was performed at an overfeed rate of 7% core yarn and 50% floating yarn to obtain a taslan processed yarn. Four of these Taslan processed yarns were twisted at 60 T / M and treated at 180 ° C. while applying 20% overfeed to obtain a twisted yarn.
Thereafter, this twisted yarn was used as a weft insertion yarn and processed in the same manner as in Example 1 to obtain a contact material. The evaluation results are shown in Table 1.

(比較例1)
実施例1のタスラン加工糸3本を合撚せずに引きそろえて、180℃で熱処理を施し、緯挿入糸として使用し、実施例1と同様に編立てし、接触材を得た。評価結果を表1に示す。
(Comparative Example 1)
Three Taslan processed yarns of Example 1 were gathered without twisting, heat-treated at 180 ° C., used as weft insertion yarns, and knitted in the same manner as in Example 1 to obtain contact materials. The evaluation results are shown in Table 1.

(比較例2)
330デシテックス、72フィラメントのポリエステルレギュラー糸4本を60T/mで合撚し、更に、この合撚糸8本を60T/mで合撚して、合撚糸を得た。その後、得られた合撚糸を緯挿入糸として使用し、実施例1と同様に加工して、接触材を得た。評価結果を表1に示す。
(Comparative Example 2)
Four polyester regular yarns of 330 dtex and 72 filaments were twisted at 60 T / m, and further, eight of these yarns were twisted at 60 T / m to obtain a twisted yarn. Thereafter, the obtained twisted yarn was used as a weft insertion yarn and processed in the same manner as in Example 1 to obtain a contact material. The evaluation results are shown in Table 1.

Figure 0005917141
Figure 0005917141

表1より、本発明の嵩高複合糸を用いた接触材は、活性汚泥が満遍なく適度に付着し、且つ閉塞性がなく、水処理能力に優れていることがわかる。 From Table 1, it can be seen that the contact material using the bulky composite yarn of the present invention has the activated sludge uniformly and moderately attached, has no blocking property, and is excellent in water treatment capacity.

1 合撚糸
2 空隙部
3 タスラン加工糸
4 接触材
5 地編
6 緯挿入糸
7 取付部
DESCRIPTION OF SYMBOLS 1 Synthetic yarn 2 Cavity part 3 Taslan processed thread 4 Contact material 5 Ground stitch 6 Weft insertion thread 7 Attachment

Claims (3)

被処理排水中に浸漬させると共に、付着活性汚泥により前記排水を処理する生物学的接触材であって、合成繊維のマルチフィラメントからなるタスラン加工糸を20〜60T/mの合撚数で複数本合撚した糸条を少なくとも一部に用いてなり、合撚糸が熱融着糸を含むことを特徴とする生物学的処理用接触材。 A biological contact material which is immersed in the wastewater to be treated and which treats the wastewater with the attached activated sludge, and a plurality of Taslan processed yarns composed of multifilaments of synthetic fibers at a twisting number of 20 to 60 T / m at least a portion Goyo the yarn to Ri Na using, biological treatment for contact material twisted yarn is characterized in that it comprises a thermal fusion yarn. 合撚糸の総繊度が、7000〜15000デシテックスである請求項1に記載の生物学的処理用接触材。 The contact material for biological treatment according to claim 1 , wherein the total fineness of the twisted yarn is 7000 to 15000 dtex. 被処理排水中に浸漬させると共に、付着活性汚泥により前記排水を処理する生物学的接触材であって、合成繊維のマルチフィラメントからなるタスラン加工糸を20〜60T/mの合撚数で複数本合撚した糸条を少なくとも一部に用いてなり、合撚糸の中心部では、繊維密度が密な部分に囲まれた空隙部が存在し、その外周には繊維密度が密な部分と疎な部分が混在する部分が形成されることを特徴とする生物学的処理用接触材。  A biological contact material which is immersed in the wastewater to be treated and which treats the wastewater with the attached activated sludge, and a plurality of Taslan processed yarns composed of multifilaments of synthetic fibers at a twisting number of 20 to 60 T / m The twisted yarn is used for at least a part, and in the central portion of the twisted yarn, there is a void surrounded by a portion where the fiber density is dense, and the outer periphery of the yarn is dense and sparse. A biological treatment contact material characterized in that a mixed portion is formed.
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