JP2006281183A - Water treatment apparatus using biological membrane - Google Patents
Water treatment apparatus using biological membrane Download PDFInfo
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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
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Abstract
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本発明は、紐状繊維の微生物付着部材を利用して有機性汚水を浄化する生物膜処理装置に関し、その処理性能を向上した新規装置に関するものである。The present invention relates to a biofilm treatment apparatus that purifies organic sewage using a microorganism-attached member of string-like fibers, and relates to a novel apparatus with improved treatment performance.
家庭排水や工場排水や下水などを微生物処理するための排水処理装置として、活性汚泥処理装置が知られている。しかし、▲１▼活性汚泥のバルキングトラブルが起きやすい。▲２▼低ＢＯＤ負荷しかとれない。▲３▼余剰汚泥発生量が多い。▲４▼ＢＯＤが２０ｍｇ／Ｌ以下の低濃度の原水を浄化することが難しく、海洋、河川、湖沼などの浄化を効果的に行うことができない。などの問題点がある。An activated sludge treatment apparatus is known as a wastewater treatment apparatus for microbial treatment of domestic wastewater, factory wastewater, sewage, and the like. However, (1) activated sludge bulking troubles easily occur. (2) Only low BOD load can be taken. (3) Excess sludge generation is large. (4) It is difficult to purify low-concentration raw water with a BOD of 20 mg / L or less, and it is impossible to effectively purify oceans, rivers, lakes and the like. There are problems such as.
他の排水処理装置として、ゲルあるいはスポンジなどの粒状固体を生物付着担体とし、この担体を槽内で流動させながら生物処理する流動担体生物膜処理装置も良く知られている。しかし、活性汚泥処理装置の場合と同様の問題点があるうえに、担体相互の接触により担体から微生物膜泥が剥離され、担体としての役割を充分果たさなくなるという問題点もある。ゲル担体、スポンジ担体は磨耗しやすく、定期的な補給が必要になるという難点もある。As another wastewater treatment apparatus, a fluid carrier biofilm treatment apparatus is known which uses a solid solid such as a gel or sponge as a bioadhesive carrier and performs biological treatment while flowing the carrier in a tank. However, in addition to the same problems as in the case of the activated sludge treatment apparatus, there is also a problem that the microbial membrane mud is peeled off from the carriers due to the mutual contact between the carriers, so that the role as a carrier cannot be sufficiently fulfilled. Gel carriers and sponge carriers are subject to wear, and there is a drawback that regular replenishment is required.
これに対し、他の固定式微生物付着部材を用いた排水処理装置として、本出願人による〔特許文献１〕（特公平７−１０３９４号）に記載された繊維製の紐状接触材を用いたものが知られている。この繊維製の紐状接触材は、特殊な親水性繊維を用いることによって、繊維全体を嵩高とするとともに、繊維に多数の細かな空隙を形成して汚泥の付着性の向上を図ったものである。On the other hand, as a wastewater treatment apparatus using another fixed type microorganism-adhering member, a fiber string-like contact material described in [Patent Document 1] (Japanese Patent Publication No. 7-10394) by the present applicant was used. Things are known. This fiber-like string-like contact material is made by using special hydrophilic fibers to make the whole fiber bulky and to improve the adhesion of sludge by forming many fine voids in the fiber. is there.
この接触材は、芯材と房状糸とを有した構成されている。芯材は、汚水処理槽の水面下に垂直方向に配置されている。房状糸は、その多数本が、芯材の長さ方向にわたって、この芯材から水平方向に放射状に突出されている。そして、房状糸は、芯材の位置を基端として被処理水中で揺動可能とされている。このような接触材が処理槽の内部に多数配置されることで、水処理装置を構成している。
原水は接触材に付着した微生物によって浄化処理される。そして、この接触材は、旧来の接触材と異なり、この接触材周囲の被処理水の流速を高くすることにより揺動を起こさせ、この揺動によって過剰な生物膜汚泥を落下させることで、汚泥の過剰付着を防止できるという特長を有する。The contact material has a core material and tufted yarn. The core material is arranged in the vertical direction below the water surface of the sewage treatment tank. A large number of tufted yarns protrude radially from the core material in the horizontal direction over the length direction of the core material. The tufted yarn can be swung in the water to be treated with the position of the core material as the base end. A large number of such contact materials are arranged inside the treatment tank to constitute a water treatment apparatus.
The raw water is purified by microorganisms attached to the contact material. And unlike the conventional contact material, this contact material causes rocking by increasing the flow rate of the water to be treated around this contact material, and by dropping excessive biofilm sludge by this rocking, It has the feature of preventing excessive adhesion of sludge.
このような、紐状接触材（垂直方向長さは、曝気槽水深より少し短い４〜５．５ｍ程度）を型枠ユニットに１０ｍｍ程度の間隔で多数本懸垂し、これを曝気槽内に沈めて充填群体を形成した場合、原水と紐状接触材に付着した微生物と効果的に接触させ、かつ微生物が過剰に付着しないように，適度に大きな流速の水流を紐状接触材の表面に与え、かつ紐状接触材に付着した微生物の表面にむらなく溶存酸素を与えることが、非常に重要なポイントである。
このために従来は、生物処理槽の中央部に紐状接触材を充填しない空間部を設け、この空間部の底部に空気散気部材（散気管など）を設けて曝気してエアリフト作用を生起させて、空間部に上昇流を生起させ、充填体群体に下降流の循環水流を与え溶存酸素と緩い流速を与える方法が採用されていた。A number of such string-like contact materials (the length in the vertical direction is about 4 to 5.5 m which is slightly shorter than the depth of the aeration tank) are suspended from the mold unit at intervals of about 10 mm and submerged in the aeration tank. When the packed group is formed, the surface of the string-like contact material is given a moderately high flow rate so that the raw water and the microorganisms adhering to the string-like contact material are effectively brought into contact with each other and the microorganisms are not excessively adhered. In addition, it is a very important point to uniformly provide dissolved oxygen to the surface of the microorganism attached to the string-like contact material.
For this reason, conventionally, a space not filled with the string-like contact material is provided at the center of the biological treatment tank, and an air diffusing member (aeration tube or the like) is provided at the bottom of the space to aerate and cause an air lift action. Thus, a method has been adopted in which an upward flow is generated in the space, and a circulating water flow in a downward flow is applied to the packed body to provide dissolved oxygen and a slow flow rate.
しかしながら、このような従来の曝気方法は、エアリフト効果によって引き起こされる推進力の弱い水流を利用するため、流速にばらつきが発生しやすく、また流速コントロールも困難であった。また、その循環水流速、推進力は小さいため接触材として高密度品の使用が難しく、また充填密度を上げにくかった。紐状接触材の取り付けピッチは狭くするほど、充填密度は大きくできるが、従来は、１０ｍｍ以下のピッチにすることはできなかった。
さらに、スフェロチルス、フザリウムなど繊維担体への付着性が良い糸状微生物が増殖しやすい原水性状の場合などに、紐状接触材に過剰な微生物が付着し、水流に対する抵抗が著しく増加し、水流が微生物面に到達しない状態になる。この結果、原水と微生物との接触が悪化し、かつ紐状接触材に付着している微生物には溶存酸素供給が十分行えないので、微生物が嫌気化し腐敗するなどの問題点があった。腐敗すると悪臭が発生する問題もある。
かつ、槽水深が浅い場合にはエアリフト効果が出にくかった。However, since such a conventional aeration method uses a water flow having a low propulsive force caused by the air lift effect, the flow velocity tends to vary, and the flow velocity control is difficult. Further, since the circulating water flow velocity and propulsive force are small, it is difficult to use a high-density product as a contact material, and it is difficult to increase the packing density. Although the packing density can be increased as the attachment pitch of the string-like contact material is reduced, conventionally, the pitch cannot be set to 10 mm or less.
Furthermore, in the case of a raw aqueous form in which filamentous microorganisms such as spherocillus and fusarium that have good adhesion to the fiber carrier are easy to grow, excessive microorganisms adhere to the string-like contact material, the resistance to water flow increases significantly, and the water flow becomes microorganisms. The surface is not reached. As a result, the contact between the raw water and the microorganisms deteriorates, and the microorganisms adhering to the string-like contact material cannot sufficiently supply dissolved oxygen, which causes problems such as microorganisms becoming anaerobic and decaying. There is also a problem that a bad smell occurs when it rots.
In addition, when the tank water depth is shallow, the air lift effect was difficult to achieve.
このような問題がおきやすい原水のケースでは、エアリフト作用ではなく充填群体の下部の全面に孔系４ｍｍ程度の散気管を配備し、粗大気泡を吐出させる方法（全面曝気法と呼ぶ）も従来採用されていた。
しかし、この全面曝気法では、生物膜の嫌気化、過剰付着は防止できても、気泡径が大きいため、上昇速度が大きい気泡の激しい運動によって、紐状生物付着材から微生物が過剰に剥離しやすいという問題を引き起こしやすかった。気泡径が大きいため酸素吸収効率も高くなかった。また、接触材への気泡の当たり具合によっては接触材への付着汚泥の付着むらが発生しやすかった。In the case of raw water, where such problems are likely to occur, a conventional method has been adopted in which an air diffuser with a hole system of about 4 mm is provided over the entire surface of the lower part of the packed group rather than an air lift, and coarse bubbles are discharged (referred to as a full surface aeration method). It had been.
However, in this whole surface aeration method, even though anaerobic and excessive adhesion of the biofilm can be prevented, since the bubble diameter is large, microorganisms are exfoliated excessively from the string-like bioadhesive material by vigorous movement of bubbles with a large ascending speed. It was easy to cause the problem of being easy. Oxygen absorption efficiency was not high due to the large bubble diameter. In addition, depending on how the air bubbles hit the contact material, uneven adhesion of the attached sludge to the contact material was likely to occur.
本発明は、このような問題点を解決し紐状接触材の充填群体全体に、満遍なく十分な酸素と水流を与え、生物学的汚水浄化作用を効果的に行うことが可能な新規生物膜処理装置を提供することを課題とする。The present invention is a novel biofilm treatment capable of solving such problems and providing a uniform and sufficient flow of oxygen and water throughout the packed contact mass of the string-like contact material to effectively perform biological sewage purification. It is an object to provide an apparatus.
この課題を解決するために、本発明者は、紐状接触材充填体への酸素供給と水流付与に水中曝気撹拌装置を適用し、さらに新規アイデアを付加して前記課題を解決した。
すなわち、本発明は生物処理槽水面下に、微生物付着用の紐状接触部材を多数本懸垂充填し、かつ槽中央部の底部に「水中曝気攪拌装置」を配備し、前記充填物の下部へ気液混相流を吐出するとともに、該「水中曝気攪拌装置」のモータ回転数を周期的に増減させる制御機構を設けたこと特徴とする生物膜による水処理装置である。In order to solve this problem, the present inventor applied the underwater aeration and agitation device for supplying oxygen to the string-like contact material filler and applying water flow, and further added a new idea to solve the problem.
That is, in the present invention, a large number of string-like contact members for attaching microorganisms are suspended and filled below the surface of the biological treatment tank, and an “underwater aeration stirrer” is provided at the bottom of the center of the tank, and the lower part of the packing is placed. A biofilm water treatment apparatus is provided with a control mechanism that discharges a gas-liquid mixed phase flow and periodically increases or decreases the motor rotation speed of the “underwater aeration and stirring apparatus”.
「水中曝気撹拌装置」とは、たとえば〔特許文献２〕特開平６−２８５４８８に開示されているように、水中ポンプの一種であり、駆動機、攪拌翼、水流吸引部と空気供給部、気液混相流吐出部を持つポンプ機械である。
「水中曝気撹拌装置」は、円筒状のポンプケーシング内に配置された撹拌翼を水中モータ等によって回転駆動することにより、ポンプケーシング内に水を吸引するようになっている。ポンプケーシング内に吸引された水には、ポンプケーシング内を通流する間に、別途、供給される空気が拡散されて、空気の拡散された水が、ポンプケーシングの放射方向に吐出するようになっている。
なお「水中曝気攪拌装置」は「水中エアレータ」と呼ばれることもある。水中エアレータとして最初に製品化された製品として「アクアレータ」（阪神動力機械株式会社製品）が広く知られている。The “underwater aeration and agitation device” is a kind of submersible pump as disclosed in, for example, [Patent Document 2] JP-A-6-285488, and includes a drive unit, a stirring blade, a water flow suction unit, an air supply unit, This is a pump machine with a liquid mixed phase discharge part.
The “underwater aeration and agitation device” is configured to suck water into the pump casing by rotationally driving a stirring blade disposed in a cylindrical pump casing by an underwater motor or the like. In the water sucked into the pump casing, separately supplied air is diffused while flowing through the pump casing so that the water in which the air is diffused is discharged in the radial direction of the pump casing. It has become.
The “underwater aeration / stirring device” is sometimes called an “underwater aerator”. "Aquarator" (product of Hanshin Power Machinery Co., Ltd.) is widely known as a product that was first commercialized as an underwater aerator.
しかし、本発明者らが実際に試験した結果、従来の「水中曝気撹拌装置」を単に紐状接触材充填体の曝気に適用しても次のような問題点が解決できないことが知見された。
すなわち、図１のように生物処理槽（曝気槽）に微生物付着用の紐状接触部材を懸垂充填し、かつ槽中間部の底部に、水中曝気攪拌装置を配備して水中曝気攪拌装置を運転し、前記充填物の下面への吐出水流を与えると、従来の水中曝気攪拌装置はモータ回転数が一定条件で運転されるために、図３のようにほぼ一定のフローパターンが槽内に形成されてしまう。
このため、気泡混相水流が紐状接触部材の充填群のほぼ同一の場所にだけ到達し、その部分より上部の紐状接触部材には強い気泡上昇水流が与えられるが、他の紐状接触部材には十分な気泡混相流が及ばない。この結果、この部分の紐状接触材付着微生物には十分な汚水の浄化に必要な酸素と水流が与えられず紐状接触部材の全体が汚水の浄化に寄与できないことが知見された。However, as a result of actual tests by the present inventors, it has been found that the following problems cannot be solved even if the conventional “underwater aeration and stirring device” is simply applied to aeration of the string-like contact material filler. .
That is, as shown in FIG. 1, a biological treatment tank (aeration tank) is suspended and filled with a string-like contact member for adhering microorganisms, and an underwater aeration agitator is provided at the bottom of the middle of the tank to operate the underwater aeration agitator. When a discharge water flow is applied to the lower surface of the packing, the conventional underwater aeration and agitation device is operated under a constant motor rotation speed, so that a substantially constant flow pattern is formed in the tank as shown in FIG. Will be.
For this reason, the bubble mixed-phase water stream reaches only the substantially same place of the packing group of the string-like contact member, and a strong bubble rising water flow is given to the string-like contact member above that part, but other string-like contact members Does not have sufficient bubble multiphase flow. As a result, it has been found that the string-like contact material adhering microorganisms in this portion are not given sufficient oxygen and water flow necessary for the purification of sewage, and the entire string-like contact member cannot contribute to the sewage purification.
この問題を解決するため鋭意検討した結果、水中曝気攪拌装置のモータ回転数制御機構を設け、モータ回転数を周期的に増減させ水中曝気攪拌装置の吐出水流速、流量を増減させることによって、フローパターンを周期的に増減させる方法に想到した。この方法によれば、モータ回転数が最大の場合に、水中曝気撹拌装置から最長地点の紐状接触材充填体の下部に気泡混相流を及ぼすことができ、モータ回転数が最小の場合に水中曝気撹拌装置から最短地点の充填体に気泡混相流を及ぼすことができる。したがって周期的に確実に、充填群体全体に十分な酸素と水流を供給することができる。As a result of diligent studies to solve this problem, a motor rotation speed control mechanism of the underwater aeration stirrer is provided, and the flow rate is increased and decreased by periodically increasing and decreasing the motor rotation speed to increase and decrease the discharge water flow rate and flow rate of the underwater aeration stirrer. We came up with a method to increase or decrease the pattern periodically. According to this method, when the motor rotation speed is maximum, the bubble mixed phase flow can be exerted from the submerged aeration and stirring device to the lower part of the longest point string-like contact material filler, and when the motor rotation speed is minimum, A bubble mixed phase flow can be exerted on the packing body at the shortest point from the aeration and stirring device. Accordingly, sufficient oxygen and water flow can be supplied to the entire packed group reliably and periodically.
本発明によれば次の効果が得られる。
▲１▼従来のような散気管によるエアリフト作用あるいは充填体下面からの散気管による曝気の場合に、原水性情によっては、紐状接触材付着微生物の部分的嫌気化領域の形成、水流不足による微生物過剰付着現象が起きることがあったが、本発明によれば、このような問題が起きない。
▲２▼水中曝気撹拌装置によって曝気する場合、微生物付着紐状接触材の充填群全体に十分な酸素供給と原水接触頻度を与えることができるので、接触材の充填群全体が効果的に原水の浄化に貢献でき、処理槽内に原水浄化に寄与しない死空間が発生しない。
▲３▼水中曝気撹拌装置によって推進力の大きな水流が発生するので、紐状微生物付着部材の取り付けピッチを狭くして充填密度を高くしても、問題なく流速と溶存酸素を与えることが可能になり、汚水処理装置の装置のコンパクト化ができる。
▲４▼モータ回転数増減サイクルを意図的に長く設定することによって、積極的に周期的に充填群体に好気・嫌気領域を形成させることによって単一槽内で生物学的硝化脱窒素を行うことが可能になる。この結果、従来のような硝化液循環ポンプが不要になり、省エネルギー化ができる。According to the present invention, the following effects can be obtained.
(1) In the case of conventional air lift action by an air diffuser or aeration by an air diffuser from the bottom of the packing body, depending on the raw water condition, formation of a partially anaerobic region of microorganisms attached to string-like contact material, microorganisms due to insufficient water flow Although an excessive adhesion phenomenon may occur, according to the present invention, such a problem does not occur.
(2) When aeration is performed with an underwater aeration / stirring device, sufficient supply of oxygen and frequency of contact with raw water can be provided to the entire packed group of microorganism-attached string-like contact materials, so that the entire packed group of contact materials can effectively supply raw water. It can contribute to purification, and there is no dead space in the treatment tank that does not contribute to raw water purification.
(3) Since an underwater aeration / stirring device generates a large flow of propulsive force, it is possible to give flow velocity and dissolved oxygen without any problems even if the packing pitch is increased by narrowing the attachment pitch of the string-like microorganism adhesion member. Thus, the sewage treatment apparatus can be made compact.
(4) Biological nitrification denitrification is performed in a single tank by actively setting aerobic / anaerobic regions in the filling group periodically by intentionally setting the motor rotation speed increase / decrease cycle to be long. It becomes possible. As a result, a conventional nitrating liquid circulation pump is not required, and energy saving can be achieved.
本発明の一実施態様を、図１を参照して説明する。
汚水流入部６と処理液流出部８を持つ生物処理槽１の水面下には、紐状接触部材が所定のピッチで多数本懸垂されて充填群体２を形成している。充填群体２の上と下には空間部が設けられる。紐状接触材の隣同士の取り付け間隔は、狭すぎると水流に対する抵抗が大きすぎ、広すぎると微生物付着面積が減少してしまうので、７〜１０ｍｍ程度が好適である。One embodiment of the present invention will be described with reference to FIG.
Under the water surface of the biological treatment tank 1 having the sewage inflow portion 6 and the treatment liquid outflow portion 8, a large number of string-like contact members are suspended at a predetermined pitch to form a packed group 2. Space portions are provided above and below the filling group 2. The attachment interval between the adjacent string-like contact materials is preferably about 7 to 10 mm because the resistance to water flow is too large if it is too narrow, and if it is too wide, the microbial adhesion area decreases.
しかして、原水を本発明の生物膜処理槽１に供給し、水中曝気攪拌装置３を運転する。
生物処理槽１の中間部の底部には、水中曝気撹拌装置３が設置されている。水中曝気撹拌装置３には空気などの酸素含有ガスの供給管４が接続されている。また撹拌翼を駆動するモータ７が接続され、モータ７には回転数制御機構が配備されている。このような水中曝気攪拌装置３を運転すると水平方向の気液混相流５が吐出され、充填体２の下部に気泡混相流が供給され、その後、上昇水流となって、充填体２の中を通過して行く。そして水中曝気攪拌装置のモータ回転数を周期的に増減すると、周期的に充填体の下部の異なった場所に気泡混相流が到達するので、ある時間範囲で、充填体２の全体に十分な酸素と水流が及ぼされ、原水は微生物によって浄化されたのち、処理槽１から流出し、後続する沈殿槽などの固液分離装置に供給される。Then, raw water is supplied to the biofilm treatment tank 1 of the present invention, and the underwater aeration and agitation apparatus 3 is operated.
An underwater aeration and agitation device 3 is installed at the bottom of the intermediate portion of the biological treatment tank 1. An oxygen-containing gas supply pipe 4 such as air is connected to the underwater aeration and agitation device 3. A motor 7 for driving the stirring blade is connected, and the motor 7 is provided with a rotation speed control mechanism. When such an underwater aeration stirrer 3 is operated, a horizontal gas-liquid mixed phase flow 5 is discharged, a bubble mixed phase flow is supplied to the lower part of the packing body 2, and then an ascending water flow is formed in the packing body 2. Go through. When the motor rotational speed of the underwater aeration and stirring device is periodically increased or decreased, the bubble mixed phase flow periodically reaches different places below the packing body, so that sufficient oxygen is supplied to the entire packing body 2 within a certain time range. After the raw water is purified by microorganisms, it flows out of the processing tank 1 and is supplied to a subsequent solid-liquid separation device such as a precipitation tank.
一台あたりの水中曝気攪拌装置で、どの程度の処理槽１の水平面積を曝気攪拌できるかという点については、当然、水中曝気攪拌装置のモータ動力が大きいほど、大きな面積を攪拌でき、たとえば、紐状充填体が無い曝気槽の場合は、攪拌モータ消費動力１ｋｗ当り３０〜３５ｍ２程度の槽面積を曝気攪拌できる。紐状接触材を多数充填する場合は水流に対する抵抗があるので、攪拌モータ消費動力１ＫＷあたり２０から２５ｍ２程度の面積を攪拌できる。Regarding the point of how much horizontal area of the treatment tank 1 can be aerated and stirred by the underwater aeration and stirring device per unit, naturally, the larger the motor power of the underwater aeration and stirring device, the larger the area can be stirred. In the case of an aeration tank without a string-like filler, the tank area of about 30 to 35 m 2 per 1 kW of stirring motor power consumption can be aerated. When a large number of string-like contact materials are filled, since there is resistance against water flow, an area of about 20 to 25 m 2 can be stirred per 1 KW of stirring motor power consumption.
なお図１では吸引水流が水中曝気攪拌装置３の上方向から吸引される場合を示したが、水中曝気攪拌装置３の下部から水を吸引するタイプの機種も適用してよい。Although FIG. 1 shows a case where the suction water flow is sucked from above the underwater aeration stirrer 3, a model that sucks water from the lower part of the underwater aeration stirrer 3 may also be applied.
本発明に従って、好気性生物処理を行う場合、水中曝気撹拌装置３のモータ７の回転数を、周期的に最大から最小に変化させる時間サイクルの好適値は、原水のＢＯＤ濃度に影響され、原水ＢＯＤが高い場合ほど溶存酸素が消費されやすいので短時間サイクルにすべきである。
例えば下水のようなＢＯＤ１５０〜２００ｍｇ／ｌ程度の原水では、モータ７回転数を最大から最小に変化させる時間サイクルの好適値としては、１サイクル５〜 １０分間程度が好適である。なおモータ回転数制御はインバーターなどによって容易に行える。
原水ＢＯＤが約１５０〜２００ｍｇ／ｌ以上の場合は、モータ回転数変化１サイクルが３０分以上の長時間サイクルにすると、充填体２に嫌気的な領域が形成されてしまうことがあるので避けるべきである。When aerobic biological treatment is performed according to the present invention, the preferred value of the time cycle for periodically changing the rotation speed of the motor 7 of the underwater aeration and stirring device 3 from the maximum to the minimum is influenced by the BOD concentration of the raw water, The higher the BOD, the more easily dissolved oxygen is consumed, so the cycle should be short.
For example, in raw water having a BOD of about 150 to 200 mg / l such as sewage, a suitable value for the time cycle for changing the number of rotations of the motor 7 from the maximum to the minimum is preferably about 1 to 5 to 10 minutes. The motor speed control can be easily performed by an inverter or the like.
When the raw water BOD is about 150 to 200 mg / l or more, an anaerobic region may be formed in the packed body 2 when one cycle of the motor rotation speed change is a long cycle of 30 minutes or more. It is.
なお、本発明によって生物学的硝化脱窒素反応を行いたい場合は、水中曝気撹拌装置３のモータ７回転数を最大から最小に変化させる時間サイクルとして、意識的に１サイクルあたり３０分〜１時間程度の長いサイクルを組み、意図的に紐状接触材充填体２に周期的な好気・嫌気領域を形成させると、単一槽１で硝化と脱窒素を起こさせることができるので非常に好適な実施態様である。（好気領域のときに硝化が起き、嫌気領域のときに脱窒素反応が進む。）
この結果、従来の生物学的硝化脱窒素装置のように、脱窒素槽、硝化槽を別個の槽に分離する必要も無く、大量の硝化液を脱窒素槽に循環するポンプも不要になり、設備費が削減でき、省エネルギー化も可能になる。In addition, when performing biological nitrification denitrogenation reaction by this invention, as a time cycle which changes the motor 7 rotation speed of the water aeration stirring apparatus 3 from the maximum to the minimum, consciously 30 minutes-1 hour per cycle If a long cycle of about a long time is combined and a periodic aerobic / anaerobic region is intentionally formed in the string-like contact material filling body 2, it is possible to cause nitrification and denitrification in the single tank 1, which is very suitable. Embodiment. (Nitrification occurs in the aerobic region, and denitrification proceeds in the anaerobic region.)
As a result, there is no need to separate the denitrification tank and the nitrification tank into separate tanks as in the conventional biological nitrification denitrogenation apparatus, and a pump that circulates a large amount of nitrification liquid to the denitrification tank becomes unnecessary. Equipment costs can be reduced and energy can be saved.
図１ 本発明の一実施例FIG. 1 An embodiment of the present invention
図２ 水中曝気装置のフローパターン例Fig. 2 Flow pattern example of an underwater aeration device
１ 生物処理槽
２ 紐状接触材充填体
３ 水中曝気攪拌装置
４ 酸素含有ガス
５ 吐出混相流
６ 汚水流入部
７ モータ
８ 処理液流出部
９ 吸引水流
１０ 空間部DESCRIPTION OF SYMBOLS 1 Biological treatment tank 2 String-like contact material filler 3 Underwater aeration stirrer 4 Oxygen-containing gas 5 Discharge multiphase flow 6 Sewage inflow part 7 Motor 8 Treatment liquid outflow part 9 Suction water flow 10 Space part
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| JP2005130352A JP2006281183A (en) | 2005-03-30 | 2005-03-30 | Water treatment apparatus using biological membrane |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2239050A1 (en) | 2009-04-09 | 2010-10-13 | Leonhard Dipl.-Ing. Fuchs | Assembly for biological waste water processing |
| US9333464B1 (en) | 2014-10-22 | 2016-05-10 | Koch Membrane Systems, Inc. | Membrane module system with bundle enclosures and pulsed aeration and method of operation |
| USD779631S1 (en) | 2015-08-10 | 2017-02-21 | Koch Membrane Systems, Inc. | Gasification device |
| CN112630245A (en) * | 2020-11-30 | 2021-04-09 | 广东省微生物研究所（广东省微生物分析检测中心） | Method for capturing long-line-shaped microorganisms in sediment by using carbon felt and imaging |
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2005
- 2005-03-30 JP JP2005130352A patent/JP2006281183A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2239050A1 (en) | 2009-04-09 | 2010-10-13 | Leonhard Dipl.-Ing. Fuchs | Assembly for biological waste water processing |
| US9333464B1 (en) | 2014-10-22 | 2016-05-10 | Koch Membrane Systems, Inc. | Membrane module system with bundle enclosures and pulsed aeration and method of operation |
| US9956530B2 (en) | 2014-10-22 | 2018-05-01 | Koch Membrane Systems, Inc. | Membrane module system with bundle enclosures and pulsed aeration and method of operation |
| US10702831B2 (en) | 2014-10-22 | 2020-07-07 | Koch Separation Solutions, Inc. | Membrane module system with bundle enclosures and pulsed aeration and method of operation |
| USD779631S1 (en) | 2015-08-10 | 2017-02-21 | Koch Membrane Systems, Inc. | Gasification device |
| USD779632S1 (en) | 2015-08-10 | 2017-02-21 | Koch Membrane Systems, Inc. | Bundle body |
| CN112630245A (en) * | 2020-11-30 | 2021-04-09 | 广东省微生物研究所（广东省微生物分析检测中心） | Method for capturing long-line-shaped microorganisms in sediment by using carbon felt and imaging |
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