JP3823093B2 - Contact material unit - Google Patents

Contact material unit Download PDF

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Publication number
JP3823093B2
JP3823093B2 JP2003080946A JP2003080946A JP3823093B2 JP 3823093 B2 JP3823093 B2 JP 3823093B2 JP 2003080946 A JP2003080946 A JP 2003080946A JP 2003080946 A JP2003080946 A JP 2003080946A JP 3823093 B2 JP3823093 B2 JP 3823093B2
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Japan
Prior art keywords
contact
sewage
aeration tank
material unit
tank
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JP2004283771A (en
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繁和 倉田
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倉田 陽子
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    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

Description

【０００１】
【発明の属する技術分野】
本発明は、接触板を松材を主体に形成した接触材ユニットに関する。
【０００２】
【従来の技術】
従来、生活排水、産業排水、或いは公共用水域を流れる水の浄化処理技術として、嫌気性微生物、及び好気性微生物を使用した微生物処理が多く採用されている。
【０００３】
このような微生物処理では、嫌気性微生物、好気性微生物による汚水中の有機物の除去を行うために、それらを培養するろ床を形成する必要がある。
【０００４】
ろ床として接触材を用いる場合、接触材としては微生物が付着し易い形状、寸法、材質等を考慮する必要があり、従来からセラミック板、合成樹脂板、不織布等が多く用いられている。
【０００５】
例えば特開２００３−５３３６０号公報には、蛇腹形状に折曲形成した繊維強化プラスチック（ＦＲＰ）板の表面に多孔質性セラミックス系粒子を塗布し、多孔質性セラミックス系粒子の微細孔、及び表面に微生物を成育させる技術が開示されている。
【０００６】
【特許文献１】
特開２００３−５３３６０号公報
【０００７】
【発明が解決しようとする課題】
しかし、セラミック板は高価であるため製品コストが高くなってしまう。この点、合成樹脂板は廉価で、且つ軽量であるため取扱性が良いが、平板であるため、表面の空隙率が悪く、微生物膜を安定的に固定させることができない問題がある。又、不織布は耐久性に問題があり、ランニングコストが嵩む不都合がある。
【０００８】
更に、上述した公報に開示されているように、ＦＲＰ板の表面に多孔質性セラミックス系粒子を塗布したものは、製造工数が嵩み、製品コストが高くなる問題がある。
【０００９】
本発明は上記事情に鑑み、製品コストが安く、微生物膜を安定的に固定させることができ、しかも耐久性に優れ、ランニングコストの低減を図ることのできる接触材ユニットを提供することを目的とする。
【００１０】
【課題を解決するための手段】
上記目的を達成するため第１発明は、接触曝気槽に配設し、該接触曝気槽内での微生物処理を促進させる接触板を備える接触材ユニットにおいて、上記接触板が松材を主体に形成され、上記接触板が、松材を主体に形成した接触枠体に設定間隔を開けて複数枚装填され、上記接触枠体及び上記接触板に複数の汚水流通孔が穿設され、上記各汚水流通孔の内周にバリが形成されていることを特徴とする。
【００１１】
このような構成では、接触板を松材を主体に形成したので、汚水中に長時間放置しても腐食せず耐久性に優れ、経済的である。又、年輪の隙間により高い空隙率を有しているため、微生物膜を安定的に固定することができ、良好な浄化性能を得ることができる。しかも比較的安価に購入することができるため、製品コストの低減を図ることができる。
【００１２】
この場合、好ましくは、上記接触枠体が上記接触曝気槽に複数配設されていることを特徴とする。
【００１３】
【発明の実施の形態】
以下、図面に基づいて本発明の一実施の形態を説明する。図１は排水処理装置の処理工程を示すフローチャートである。
【００１４】
本実施の形態による排水処理装置は、食品工場や畜産場等から排出される汚水（食品排水、畜産排水等）を処理対象としている。図１に示すように、排水処理装置に流れ込んだ汚水は、原水槽１に一次貯留された後、第１処理槽２、第２処理槽３に流れ込み、沈殿性の浮遊物及び浮上性の浮遊物を汚水から分離する一次処理が行われる。一次処理した汚水は、流量調整槽４で流量が一定量に調整された後、計量槽５へ流れ込み、次の処理槽に対し、ポンプ作動等により汚水を計量して所定量だけ送り込む。
【００１５】
計量槽５からの汚水は接触曝気槽に流れ込み、二次処理が行われる。本実施の形態では第１〜第３の接触曝気槽６〜８を有しており、汚水は、第１接触曝気槽６から第２接触曝気槽７及び第３接触曝気槽８を順に流れ、各接触曝気槽６〜８に装填されている接触材に付着されている好気性微生物膜による微生物作用にて浄化する二次処理（微生物処理）が行われる。
【００１６】
そして、二次処理後の汚水は、沈殿槽９で微生物のカス等の汚泥を分離し、清澄な処理水とされ、貯水槽１０を経て三次処理槽１１に流れ込んだ後、放流槽１２から放流される。尚、沈殿槽９に沈殿された微生物のカス等の汚泥は汚泥返送管１３を介して汲み上げられ、流量調整槽４へ返送されて再処理される。
【００１７】
図２、図３に示すように、第１接触曝気槽６には、複数の接触材ユニット１４が配設されている。尚、第２接触曝気槽７、第３接触曝気槽８にも接触材ユニット１４が複数配設されているが、その構成は、第１接触曝気槽６に配設されているものと同様であるため、以下の説明では第１接触曝気槽６に配設されている接触材ユニット１４の構成についてのみ説明し、他の接触曝気槽７，８に配設されている接触材ユニットの構成については説明を省略する。
【００１８】
図２に示すように、第１接触曝気槽６には、４個の接触材ユニット１４を所定間隔を開けて配設して、１列の接触材ユニット群１５を構成し、この接触材ユニットが、所定間隔を開けて３列配設されている。各接触材ユニット群１５は、その上面が、第１接触曝気槽６の内壁間に架設したフレーム１６に固設されている。又、図３に示すように、各接触材ユニット群１５の下端と、第１接触曝気槽６の底面との間に所定間隙が設けられている。
【００１９】
更に、各接触材ユニット群１５間の底部に散気管１７が配設されており、この散気管１７からの散気により、第１接触曝気槽６内に貯留されている汚水に酸素が供給される。同時に、気泡の上昇により、図３に矢印で示すように、第１接触曝気槽６内に、循環水流が生じる。この循環水流により、汚水が各接触材ユニット１４を構成する各部材の表面に付着されている好気性微生物膜に繰り返し接触されることで浄化される。
【００２０】
図４に示すように、各接触材ユニット１４は、接触枠体１８と、この接触枠体１８内に所定間隔を開けて収容されている複数の接触板１９とで構成されている。又、接触枠体１８は、カラ松等の松材を素材とする４枚の板材１８ａを釘、接着剤等の接合部材を用いて接合させて形成したものである。又、接触板１９もカラ松等の松材で形成されている。松材は、安価で、水中では腐食し難く、しかも年輪の隙間により高い空隙率を有しているため、耐久性に優れ、且つ微生物膜を安定的に固定させることができる。
【００２１】
更に、接触枠体１８を構成する各板材１８ａ、及び各接触板１９には、汚水流通孔２０が複数穿設されている。各汚水流通孔２０の大きさ、及び汚水流通孔２０どうしの間隔は、第１接触曝気槽６の有効容積、循環水流の流速等に基づいて最適なものを設定する。又、各板材１８ａ、及び各接触板１９に穿設されている汚水流通孔２０の大きさ、及び汚水流通孔２０同士の間隔は、一義的である必要はなく、例えばアトランダムに穿設されていても良い。又、図５に示すように、各汚水流通孔２０の内周には加工時に形成されるバリ部２０ａがそのまま残されている。
【００２２】
次に、このような構成による本実施の形態の作用について説明する。
排水処理装置の原水槽１に流入した汚水は、第１、第２処理槽２，３→流量調整槽４→計量槽５→第１〜第３接触曝気槽６〜８→沈殿槽９→三次処理槽１１→放流槽１２を経て所定に処理された後、放流される。
【００２３】
各接触曝気槽６〜８では、底部に配設された散気管１７からの散気により汚水に酸素が供給されると共に、図３に矢印で示すように、汚水にゆっくりとした循環水流が発生する。
【００２４】
溶存酸素を含んだ汚水は、各接触曝気槽６〜８内をゆっくりと循環する際に、この各接触曝気槽６〜８に装填されている複数の接触材ユニット１４を構成する接触枠体１８、及び接触枠体１８に収容されている接触板１９の表面に生成されている好気性微生物膜に接触して、リン、チッソ等の水中汚濁物質が除去される。
【００２５】
又、接触枠体１８、及び接触板１９は、カラ松等の松材で形成されているため、年輪の隙間による空隙率が高く、表面に微生物膜を安定的に固定させることができる。その結果、微生物膜に汚水を繰り返し接触させることで、リン、チッソ等の水中汚濁物質の殆どを除去することが可能となり、良好な浄化性能を発揮させることができる。
【００２６】
更に、、接触枠体１８、及び接触板１９に複数の汚水流通孔２０を穿設し、各汚水流通孔２０の内周に、加工時に生じるバリ部２０ａをそのまま残したので、汚水が汚水流通孔２０ａを流通する際に、汚水に含まれているリン、チッソ等の水中汚濁物質がバリ部２０ａに付着されて除去される。
【００２７】
このように、本実施の形態では、接触材ユニット１４を構成する接触枠体１８、及び接触板１９をカラ松等の松材で形成したので、松材の年輪の隙間による空隙率が高く、表面に微生物膜を安定的に固定させることができ、チッソ、リン等の水質汚濁物質を効果的に除去することができる。又、松材は水中では腐食し難いため、耐久性に優れ、何度でも使用することができ、ランニングコストの低減を図ることができる。
【００２８】
更に、接触枠体１８、及び接触板１９に穿設した汚水流通孔２０の内周に、加工時に発生するバリ部２０ａをそのまま残したので、このバリ部２０ａに、汚水に含まれているリンやチッソが付着して除去されるため、より高い浄化能力を得ることができる。
【００２９】
尚、本発明は上述した実施の形態に限るものではなく、例えば各処理槽２，３、及び各接触曝気槽６〜８の内壁にカラ松等の松材を面的に取り付けることで、微生物処理を有効的、且つ効率よく行わせることが可能となる。
【００３０】
更に、接触枠体１８を構成する各板材１８ａ、及び接触板１９はＦＲＰ等の板材の表面に松材を貼付して形成したものであっても良い。
【００３１】
【発明の効果】
以上、説明したように本発明によれば、接触板を松材で形成したので、安価に製造することができ、しかも松材の年輪により高い空隙率を得ることができるので、表面に微生物膜を安定的に固定することができる。又、松材は長時間汚水中に放置しても腐食し難くいため、耐久性に優れ、ランニングコストの低減を図ることのできる。
【図面の簡単な説明】
【図１】排水処理装置の処理工程を示すフローチャート
【図２】排水処理装置の要部平面図
【図３】排水処理装置の要部断面図
【図４】接触材ユニットの分解斜視図
【図５】接触材ユニットの要部拡大図
【符号の説明】
６〜８ 接触曝気槽
１４ 接触材ユニット
１８ 接触枠体
２０ 汚水流通孔
２０ａ バリ部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a contact material unit in which a contact plate is formed mainly of pine.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, microbial treatment using anaerobic microorganisms and aerobic microorganisms has been widely employed as a purification treatment technique for water flowing through domestic wastewater, industrial wastewater, or public water bodies.
[0003]
In such microbial treatment, in order to remove organic substances in wastewater by anaerobic microorganisms and aerobic microorganisms, it is necessary to form a filter bed for culturing them.
[0004]
When a contact material is used as the filter bed, it is necessary to consider the shape, size, material, etc. to which microorganisms easily adhere as the contact material. Conventionally, ceramic plates, synthetic resin plates, nonwoven fabrics, and the like are often used.
[0005]
For example, in Japanese Patent Application Laid-Open No. 2003-53360, porous ceramic-based particles are applied to the surface of a fiber reinforced plastic (FRP) plate bent into a bellows shape, and the fine pores of the porous ceramic-based particles and the surface Discloses a technique for growing microorganisms.
[0006]
[Patent Document 1]
Japanese Patent Laid-Open No. 2003-53360
[Problems to be solved by the invention]
However, since the ceramic plate is expensive, the product cost is increased. In this respect, the synthetic resin plate is inexpensive and lightweight, so that it is easy to handle. However, since it is a flat plate, there is a problem that the surface porosity is poor and the microbial membrane cannot be stably fixed. In addition, the nonwoven fabric has a problem in durability and has a disadvantage of increasing running cost.
[0008]
Furthermore, as disclosed in the above-mentioned publication, a product obtained by applying porous ceramic-based particles to the surface of the FRP plate has a problem that the number of manufacturing steps increases and the product cost increases.
[0009]
In view of the above circumstances, the present invention has an object to provide a contact material unit that is low in product cost, can stably fix a microbial membrane, has excellent durability, and can reduce running costs. To do.
[0010]
[Means for Solving the Problems]
First invention for achieving the above object, disposed in contact aeration tank, the contact member unit comprising a contact plate for promoting microbial processing at the contact aeration tank, formed mainly the contact plate pinewood The contact plate is loaded with a plurality of contact frames with a set interval on a contact frame body mainly formed of pine wood, and a plurality of sewage circulation holes are formed in the contact frame body and the contact plate. A burr is formed on the inner periphery of the flow hole .
[0011]
In such a configuration, since the contact plate is mainly made of pine, it does not corrode even if left in sewage for a long time, has excellent durability and is economical. Moreover, since it has a high porosity due to the gap between the annual rings, the microbial membrane can be stably fixed, and good purification performance can be obtained. In addition, since the product can be purchased at a relatively low cost, the product cost can be reduced.
[0012]
In this case, preferably, characterized in that the upper Symbol contact frame is more disposed in the contact aeration tank.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a flowchart showing a treatment process of the waste water treatment apparatus.
[0014]
The wastewater treatment apparatus according to the present embodiment treats sewage (food wastewater, livestock wastewater, etc.) discharged from food factories or livestock farms. As shown in FIG. 1, the sewage that has flowed into the wastewater treatment apparatus is primarily stored in the raw water tank 1, and then flows into the first treatment tank 2 and the second treatment tank 3. A primary treatment is performed to separate things from sewage. The first-stage treated sewage is adjusted to a fixed amount in the flow rate adjusting tank 4 and then flows into the measuring tank 5, and the sewage is metered into the next processing tank by a pump operation or the like and sent by a predetermined amount.
[0015]
The sewage from the measuring tank 5 flows into the contact aeration tank, and the secondary treatment is performed. In this Embodiment, it has the 1st-3rd contact aeration tanks 6-8, and sewage flows through the 2nd contact aeration tank 7 and the 3rd contact aeration tank 8 in order from the 1st contact aeration tank 6, A secondary treatment (microbe treatment) for purification by microbial action by an aerobic microbial membrane attached to the contact material loaded in each contact aeration tank 6-8 is performed.
[0016]
The sewage after the secondary treatment separates sludge such as microbial residue in the sedimentation tank 9 to form a clear treated water. Is done. Incidentally, sludge such as microbial residue precipitated in the sedimentation tank 9 is pumped up through the sludge return pipe 13 and returned to the flow rate adjustment tank 4 for reprocessing.
[0017]
As shown in FIGS. 2 and 3, the first contact aeration tank 6 is provided with a plurality of contact material units 14. The second contact aeration tank 7 and the third contact aeration tank 8 are also provided with a plurality of contact material units 14, but the configuration is the same as that of the first contact aeration tank 6. Therefore, in the following description, only the configuration of the contact material unit 14 disposed in the first contact aeration tank 6 will be described, and the configuration of the contact material unit disposed in the other contact aeration tanks 7 and 8 will be described. Will not be described.
[0018]
As shown in FIG. 2, in the first contact aeration tank 6, four contact material units 14 are arranged at a predetermined interval to form one contact material unit group 15, and this contact material unit However, three rows are arranged at predetermined intervals. The upper surface of each contact material unit group 15 is fixed to a frame 16 constructed between the inner walls of the first contact aeration tank 6. As shown in FIG. 3, a predetermined gap is provided between the lower end of each contact material unit group 15 and the bottom surface of the first contact aeration tank 6.
[0019]
Further, an air diffuser 17 is disposed at the bottom between the contact material unit groups 15, and oxygen is supplied to the sewage stored in the first contact aeration tank 6 by the air diffused from the air diffuser 17. The At the same time, as the bubbles rise, a circulating water flow is generated in the first contact aeration tank 6 as indicated by an arrow in FIG. By this circulating water flow, sewage is purified by repeatedly contacting the aerobic microbial membrane attached to the surface of each member constituting each contact material unit 14.
[0020]
As shown in FIG. 4, each contact material unit 14 includes a contact frame 18 and a plurality of contact plates 19 accommodated in the contact frame 18 with a predetermined interval. Further, the contact frame 18 is formed by joining four plate materials 18a made of pine materials such as karamatsu using a joining member such as a nail or an adhesive. Further, the contact plate 19 is also formed of a pine material such as a color pine. Pine wood is inexpensive, hardly corroded in water, and has a high porosity in the gaps between the annual rings, so it has excellent durability and can stably fix the microbial membrane.
[0021]
Furthermore, a plurality of sewage circulation holes 20 are formed in each plate member 18a and each contact plate 19 constituting the contact frame 18. The size of each sewage circulation hole 20 and the interval between the sewage circulation holes 20 are set optimally based on the effective volume of the first contact aeration tank 6, the flow velocity of the circulating water flow, and the like. Further, the size of the sewage circulation holes 20 formed in each plate member 18a and each contact plate 19 and the interval between the sewage circulation holes 20 do not need to be unambiguous. For example, they are formed at random. May be. Moreover, as shown in FIG. 5, the burr | flash part 20a formed at the time of a process is left as it is in the inner periphery of each sewage circulation hole 20. As shown in FIG.
[0022]
Next, the operation of the present embodiment having such a configuration will be described.
The sewage that has flowed into the raw water tank 1 of the waste water treatment apparatus is the first and second treatment tanks 2 and 3 → the flow rate adjustment tank 4 → the measurement tank 5 → the first to third contact aeration tanks 6 to 8 → the precipitation tank 9 → the tertiary After being treated in a predetermined manner via the treatment tank 11 → the discharge tank 12, it is discharged.
[0023]
In each of the contact aeration tanks 6 to 8, oxygen is supplied to the sewage by diffusing from the diffusing pipe 17 disposed at the bottom, and a slow circulating water flow is generated in the sewage as indicated by an arrow in FIG. 3. To do.
[0024]
When the sewage containing dissolved oxygen slowly circulates in each contact aeration tank 6-8, the contact frame 18 constituting the plurality of contact material units 14 loaded in each contact aeration tank 6-8. And the aerobic microorganism film produced | generated on the surface of the contact plate 19 accommodated in the contact frame 18 is contacted, and underwater pollutants, such as phosphorus and nitrogen, are removed.
[0025]
Moreover, since the contact frame 18 and the contact plate 19 are formed of pine wood such as Karamatsu, the porosity due to the gap between the annual rings is high, and the microbial membrane can be stably fixed on the surface. As a result, by repeatedly bringing the sewage into contact with the microbial membrane, it is possible to remove most of the water pollutants such as phosphorus and nitrogen, and to exhibit good purification performance.
[0026]
Further, a plurality of sewage circulation holes 20 are formed in the contact frame 18 and the contact plate 19, and the burrs 20a generated during processing are left as they are on the inner periphery of each sewage circulation hole 20, so that the sewage flows as sewage. When circulating through the holes 20a, water pollutants such as phosphorus and nitrogen contained in the sewage are attached to the burr 20a and removed.
[0027]
As described above, in the present embodiment, the contact frame 18 and the contact plate 19 constituting the contact material unit 14 are formed of pine wood such as Karamatsu, so the porosity due to the gap between the ring of pine wood is high, The microorganism membrane can be stably fixed on the surface, and water pollutants such as nitrogen and phosphorus can be effectively removed. In addition, since pine is hardly corroded in water, it is excellent in durability, can be used any number of times, and the running cost can be reduced.
[0028]
Further, since the burr 20a generated at the time of processing is left as it is on the inner periphery of the sewage circulation hole 20 drilled in the contact frame 18 and the contact plate 19, the burr 20a contains phosphorus contained in the sewage. Since nitrogen and nitrogen are attached and removed, higher purification ability can be obtained.
[0029]
In addition, this invention is not restricted to embodiment mentioned above, For example, microorganisms are attached by attaching pine materials, such as a pine, to the inner wall of each processing tank 2 and 3 and each contact aeration tank 6-8, for example. It is possible to perform the processing effectively and efficiently.
[0030]
Furthermore, each plate material 18a and the contact plate 19 constituting the contact frame 18 may be formed by attaching a pine material to the surface of a plate material such as FRP.
[0031]
【The invention's effect】
As described above, according to the present invention, since the contact plate is made of pine, it can be manufactured at a low cost, and a high porosity can be obtained by the annual rings of the pine. Can be stably fixed. In addition, pine wood is difficult to corrode even if left in sewage for a long time, so it has excellent durability and can reduce running costs.
[Brief description of the drawings]
FIG. 1 is a flowchart showing a treatment process of a wastewater treatment apparatus. FIG. 2 is a plan view of a main part of the wastewater treatment apparatus. FIG. 3 is a cross-sectional view of a main part of the wastewater treatment apparatus. 5] Enlarged view of the main part of the contact material unit [Explanation of symbols]
6-8 Contact aeration tank 14 Contact material unit 18 Contact frame body 20 Sewage circulation hole 20a Burr part

Claims (2)

接触曝気槽に配設し、該接触曝気槽内での微生物処理を促進させる接触板を備える接触材ユニットにおいて、
上記接触板が松材を主体に形成され、
上記接触板が、松材を主体に形成した接触枠体に設定間隔を開けて複数枚装填され、
上記接触枠体及び上記接触板に複数の汚水流通孔が穿設され、
上記各汚水流通孔の内周にバリが形成されている
ことを特徴とする接触材ユニット。In a contact material unit provided with a contact plate disposed in a contact aeration tank and promoting microbial treatment in the contact aeration tank,
The contact plate is formed mainly of pine ,
A plurality of the contact plates are loaded at set intervals on a contact frame formed mainly of pine wood,
A plurality of sewage flow holes are formed in the contact frame and the contact plate,
A contact material unit , wherein burrs are formed on the inner periphery of each of the sewage circulation holes . 上記接触枠体が上記接触曝気槽に複数配設されている
ことを特徴とする請求項１記載の接触材ユニット。Contact material unit according to claim 1, wherein the contact frame is characterized in that it is more disposed in the contact aeration tank.
JP2003080946A 2003-03-24 2003-03-24 Contact material unit Expired - Fee Related JP3823093B2 (en)

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