JP4219110B2 - Scum eliminating sewage treatment method and apparatus - Google Patents

Scum eliminating sewage treatment method and apparatus Download PDF

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JP4219110B2
JP4219110B2 JP2002077104A JP2002077104A JP4219110B2 JP 4219110 B2 JP4219110 B2 JP 4219110B2 JP 2002077104 A JP2002077104 A JP 2002077104A JP 2002077104 A JP2002077104 A JP 2002077104A JP 4219110 B2 JP4219110 B2 JP 4219110B2
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sewage
chamber
treatment tank
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弘道 河原
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弘道 河原
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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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    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Description

【０００１】
【発明が属する技術分野】
本発明は、家庭用水洗便所から排出される糞尿などの汚水を浄化処理するための方法と、その方法を実施するための汚水処理装置に関する。
【０００２】
【従来の技術】
家庭用の水洗便所から排出される糞尿は、都市部では下水管を通じて大規模な下水処理場に送られて一定基準にまで浄化処理されてから河川などに放流されている。
また、過疎地域では集落ごとに浄化合併槽を設けて処理することが促進され、各地で改良工事が行われている。
しかし、長距離の汚水管の敷設と大型化された合併槽の設備には多額の費用を要し、自治体や住民は新たな負担を避けたいために計画どおりに工事が進んでいる地域は少ない。
【０００３】
一般に環境汚染物質の対策としては、集末処理ではなく汚染源において処理することが理想的とされている。
汚水発生源である個別住宅での処理の方法としては、浸透桝方式や個別浄化槽方式などがあるが、設備の設置スペースが確保できない場合や不完全な設備をしたために、充分な処理が行われずに河川への放出が行われていることも多く見られる。
【０００４】
また、充分に処理がなされたとしても、処理機能を維持するためには汚水槽の水面に発生する比重の軽い油脂分などからなる塊（スカム）の除去処理や沈殿汚泥の引き抜き処理を定期的に行わなければならず、その処理に要する手間や費用の負担も大きいものがある。
【０００５】
特に、これまではスカムからくる悪臭は、消臭剤などで消臭する方法がなされたとしても、発生する量が大きく且つ継続して発生するために容易に防止することができなかった。
また、スカムには蝿などの昆虫の幼虫である蛆虫が発生し、そのままでは不衛生なので殺虫剤で退治するなどの処理をしていた。
【０００６】
【発明が解決しようとする課題】
本発明は、上記実情に鑑みてなされたもので、主として個別家庭用に設置される汚水槽において、その水面に汚物が浮上して形成蓄積されるスカムの発生を解消するとともに汚水を浄化して清浄な処理水を得るためのスカム解消型汚水処理方法とその方法を実施するための処理装置を提供するものである。
【０００７】
【課題を解決するための手段】
上記課題を解決するための本発明は、スカム解消型汚水処理方法とその方法を実施するためのスカム解消型汚水処理装置である。
【０００８】
その汚水処理方法は、一回方式と複数繰り返し方式とがある。
【０００９】
まず、一回方式の汚水処理方法について説明する。
この汚水処理方法については、原汚水を第一室Ａに導き入れ、その第一室Ａの低層部へ空気を継続注入することによってその室内汚水の全体を常時混濁状態に攪拌してその室内の表層スカムの発生を抑え、その第一室Ａへの原汚水流入による水位変動により攪拌混濁した汚水をその室内低部に設けた汚水流出孔２から粗目濾しして上部が閉じられた第二室Ｂに逃がし、その第二室Ｂではその汚水を安静状態にすることによってその前記流出孔２に向かって形成された室内の擂鉢状底部に重量汚泥分を沈殿させる。
さらに、その第二室Ｂへ流入する汚水の水位変動によりその室内の透明度の上がった汚水を汚水処理槽９に排出させる。
そして、その汚水処理槽９へ空気を継続して注入することによってその汚水処理槽９の汚水上層を常時攪拌して表面スカムの発生を抑えることを特徴に構成される。
【００１０】
次に複数繰り返し方式の汚水処理方法について説明する。
この汚水処理方法は、原汚水を第一室Ａに導き入れ、その第一室Ａの低層部へ空気を継続注入することによってその室内汚水の全体を常時混濁状態に攪拌してその室内の表層スカムの発生を抑え、その第一室Ａへの原汚水流入 による水位変動により攪拌混濁した汚水をその室内低部に設けた汚水流出孔２から粗目濾しして上部が閉じられた第二室Ｂに逃がする。
その第二室Ｂではその汚水を安静状態にすることによってその室内の前記流出孔２に向かって形成された擂鉢状底部に重量汚泥分を沈殿させる。
【００１１】
さらに、その第二室Ｂへ流入する汚水の水位変動によりその室内の透明度の上がった汚水を次ぎの第一室Ａに導き入れ、その流入汚水を第一室Ａの低層部へ空気を継続注入することによってその室内汚水の全体を常時混濁状態に攪拌してその室内の表層スカムの発生を抑え、その第一室Ａへの原汚水流入による水位変動により攪拌混濁した汚水をその室内低部に設けた汚水流出孔２２から粗目濾しして第二室Ｂに逃がす。
その第二室Ｂではその汚水を安静状態にすることによってその室内の擂鉢状底部に重量汚泥分を沈殿させ、そのまま又は前記第一室Ａと前記第二室Ｂの処理を繰り返す。
【００１２】
最後の第二室Ｂへ流入する汚水の水位変動によりその室内の透明度の上がった汚水を汚水処理槽９に排出する。
そして、その汚水処理槽９へ空気を継続して注入することによってその汚水処理槽９の汚水上層を常時攪拌して表面スカムの発生を抑えることを特徴に構成される。
【００１３】
また、上記スカム解消型汚水処理方法を実施するためのスカム解消型汚水処理装置は、ユニットを単数用いる形態と複数用いる形態とがある。
【００１４】
まず、ユニットを単数用いる汚水処理装置の形態はについて説明する。
この装置の形態は、上端部１ａが開き且つ下部周壁面１ｂに多数の流出孔２を有し、上端部１ａ寄りには原汚水管３を接続した汚水流入口４を設けた内縦筒１と、その内縦筒１を囲い且つ上端部５ａが内縦筒１の開口の下部で閉じ、また下端部５ｂが擂鉢状に閉じ、その上端部５ａ寄りには外に開く汚水流出口６を設けた外縦筒５と、前記内縦筒１の上端部１ａから底部１ｃ近くに差し込まれた送風機７付の送気管８とでユニットＵを構成する。
そして、このユニットＵを汚水処理槽９の隣に設置する。
【００１５】
そして、前記汚水処理槽９内の中層に微生物担体１１を埋設するとともに、送風機７付の送気管１２を前記汚水処理槽９内の低層に開口部１２ａが至るように設け、前記ユニットＵの汚水流出口６を前記汚水処理槽９の液面より上部に送水管１０を介して接続して構成される。
【００１６】
そして、原汚水管３から流入した汚水をユニットＵで処理してから汚水処理槽９に導くことによって汚水処理槽９の汚水表面にスカムを発生させないようにする。
【００１７】
次にユニットを複数用いる汚水処理装置の形態について説明する。
この装置の形態は、上端部１ａが開き且つ下部周壁面１ｂに多数の流出孔２を有し、上端部１ａ寄りには原汚水管３を接続した汚水流入口４を設けた内縦筒１と、その内縦筒１を囲い且つ上端部５ａが内縦筒１の開口の下部で閉じ、また下端部５ｂが擂鉢状に閉じ、その上端部５ａ寄りには外に開く汚水流出口６を設けた外縦筒５と、前記内縦筒１の上端部１ａから底部１ｃ近くに差し込まれた送風機７付の送気管８とでユニットＵを構成する。
【００１８】
また、上端部２１ａが開き且つ下部周壁面２１ｂに多数の流出孔２２を有し、上端部２１ａ寄りには送水管２３を接続した汚水流入口２４を設けた内縦筒２１と、その内縦筒２１を囲い且つ上端部２５ａが内縦筒２１の開口の下部で閉じ、また下端部２５ｂが擂鉢状に閉じ、その上端部２５ａ寄りには外に開く汚水流出口２６を設けた外縦筒２５と、前記内縦筒２１の上端部２１ａから底部２１ｃ近くに差し込まれた送風機２７付の送気管２８とで中間ユニットＮを構成する。
そして、その中間ユニットＮの単数又は前記汚水流出口２６に次ぎの汚水流入口２４を送水管２３を介して接続した複数個を、前記ユニットＵの汚水流出口６に最初の中間ユニットＮの汚水流入口２４を接続する。
【００１９】
そして、前記ユニットＵ及び中間ユニットＮを汚水処理槽９の隣に設置する。
また、前記汚水処理槽９内の中層に微生物担体１１を埋設するとともに、送風機７付の送気管１２を前記汚水処理槽９内の低層に開口部１２ａが至るように設ける。
そして、最後の前記中間ユニットＮの汚水流出口２６を前記汚水処理槽９の液面より上部に送水管２０を介して接続して構成する。
【００２０】
そして、原汚水管３から流入した汚水をユニットＵ及びそれに続く単数又は連結された複数個の中間ユニットＮで処理してから汚水処理槽９に導くことによって汚水処理槽９の汚水表面にスカムを発生させないようにする。
【００２１】
【発明の実施の形態】
本発明のスカム解消型汚水処理方法及びその方法を実施するためのスカム解消型汚水処理装置について、その実施の形態を図の実施例に基づいて以下詳しく説明する。
【００２２】
まず、スカム解消型汚水処理方法について説明する。
【００２３】
その処理方法は、一回方式と複数繰り返し方式とがある。
【００２４】
まず、一回方式については、図１のフロー図に示すように、原汚水を第一室Ａに導き入れ、その第一室Ａの低層部へ空気を継続注入することによってその室内汚水の全体を常時混濁状態に攪拌してその室内の表層スカムの発生を抑える。
そして、その第一室Ａへの原汚水流入による水位変動により攪拌混濁した汚水をその室内低部に設けた汚水流出孔２から粗目濾しして第二室Ｂに逃がし、
その第二室Ｂではその汚水を安静状態にすることによってその室内の擂鉢状底部に重量汚泥分を沈殿させる。
【００２５】
さらに、その第二室Ｂへ流入する汚水の水位変動によりその室内の透明度の上がった汚水を一般的に使用されている汚水処理槽９に排出する。
その汚水処理槽９へ空気を継続して注入することによってその汚水処理槽９の汚水上層を常時攪拌して表面スカムの発生を抑える。
【００２６】
次に複数繰り返し方式については、図２のフロー図に示すように、原汚水を第一室Ａに導き入れ、その第一室Ａの低層部へ空気を継続注入することによってその室内汚水の全体を常時混濁状態に攪拌してその室内の表層スカムの発生を抑え、
その第一室Ａへの原汚水流入による水位変動により攪拌混濁した汚水をその室内低部に設けた汚水流出孔２から粗目濾しして第二室Ｂに逃がす。
その第二室Ｂではその汚水を安静状態にすることによってその室内の擂鉢状底部に重量汚泥分を沈殿させる。
【００２７】
さらに、その第二室Ｂへ流入する汚水の水位変動によりその室内の透明度の上がった汚水を次ぎの第一室Ａに導き入れ、その流入汚水を第一室Ａの低層部へ空気を継続注入することによってその室内汚水の全体を常時混濁状態に攪拌してその室内の表層スカムの発生を抑える。
【００２８】
その第一室Ａへの原汚水流入による水位変動により攪拌混濁した汚水をその室内低部に設けた汚水流出孔２２から粗目濾しして第二室Ｂに逃がす。
その第二室Ｂではその汚水を安静状態にすることによってその室内の擂鉢状底部に重量汚泥分を沈殿させ、そのまま又は前記第一室Ａと前記第二室Ｂの処理を繰り返えす。
【００２９】
最後の第二室Ｂへ流入する汚水の水位変動によりその室内の透明度の上がった汚水を一般的に使用されている汚水処理槽９に排出する。
その汚水処理槽９へ空気を継続して注入することによってその汚水処理槽９の汚水上層を常時攪拌して表面スカムの発生を抑える。
【００３０】
また、上記スカム解消型汚水処理方法を実施するためのスカム解消型汚水処理装置は、上記各方法に対応してユニットを単数用いる形態と複数用いる形態とがある。
【００３１】
まず、ユニットを単数用いる装置の形態はについては、図３に示すように、上端部１ａが開き且つ下部周壁面１ｂに多数の流出孔２を有し、上端部１ａ寄りには原汚水管３を接続した汚水流入口４を設けた内縦筒１と、その内縦筒１を囲い且つ上端部５ａが内縦筒１の開口の下部で閉じ、また下端部５ｂが擂鉢状に閉じ、その上端部５ａ寄りには外に開く汚水流出口６を設けた外縦筒５と、前記内縦筒１内の汚水全体攪拌を目的として、前記内縦筒１の上端部１ａから底部１ｃ近くに差し込まれて先端の空気注入口８ａが内縦筒１の底部１ｃに開口した送風機７付の送気管８とでユニットＵを形成する。
【００３２】
したがって、そのユニットＵにおいて、内縦筒１内には第一室Ａが形成され、内縦筒１の周壁面の外側と外縦筒５内には第二室Ｂが形成されることになる。
そして第一室Ａと第二室Ｂとは、前記内縦筒１の下端部周面に設けた網目、スリッド群、小孔群などの多数の流出孔２により連通状態となっている。
【００３３】
そして、そのユニットＵを汚水処理槽９の隣に設置する。
【００３４】
前記汚水処理槽９内の中層に微生物担体１１を埋設するとともに、送風機７付の送気管１２を前記汚水処理槽９内の低層に開口部１２ａが至るように設け、前記ユニットＵの汚水流出口６を前記汚水処理槽９の液面より上部に送水管１０を介して接続する。
【００３５】
前記汚水処理槽９のへの空気注入は、設置した微生物担体１１への酸素補給と、汚水処理槽９内の汚水の表面に浮上してきた固形物を分散し、固形物同士が付着して塊となるのを防止するための汚水上層部に対する攪拌を目的としている。
【００３６】
原汚水管３から流入した汚水をユニットＵで処理してから汚水処理槽９に導くことによって汚水処理槽９の汚水表面にスカムを発生させないようにしたことを特徴とするものである。
【００３７】
次にユニットを複数用いる装置の形態については、図４に示すように、上端部１ａが開き且つ下部周壁面１ｂに多数の流出孔２を有し、上端部１ａ寄りには原汚水管３を接続した汚水流入口４を設けた内縦筒１と、その内縦筒１を囲い且つ上端部５ａが内縦筒１の開口の下部で閉じ、また下端部５ｂが擂鉢状に閉じ、その上端部５ａ寄りには外に開く汚水流出口６を設けた外縦筒５と、前記内縦筒１の上端部１ａから底部１ｃ近くに差し込まれた送風機７付の送気管８とでユニットＵを形成する。
【００３８】
また、上端部２１ａが開き且つ下部周壁面２１ｂに多数の流出孔２２を有し、上端部２１ａ寄りには送水管２３を接続した汚水流入口２４を設けた内縦筒２１と、その内縦筒２１を囲い且つ上端部２５ａが内縦筒２１の開口の下部で閉じ、また下端部２５ｂが擂鉢状に閉じ、その上端部２５ａ寄りには外に開く汚水流出口２６を設けた外縦筒２５と、前記内縦筒２１の上端部２１ａから底部２１ｃ近くに差し込まれた送風機２７付の送気管２８とで中間ユニットＮを形成する。
【００３９】
そして、その中間ユニットＮの単数又は前記汚水流出口２６に次ぎの汚水流入口２４を送水管２３を介して接続した複数個（図５の（イ）はユニットＵと中間ユニットＮを各１個、（ロ）はユニットＵが１個で中間ユニットＮを２個用いたさ態様である）を前記ユニットＵの汚水流出口６に最初の中間ユニットＮの汚水流入口２４を接続する。
そして、前記ユニットＵ及び中間ユニットＮを汚水処理槽９の隣に設置する。
【００４０】
前記汚水処理槽９内の中層に微生物担体１１を埋設するとともに、送風機７付の送気管１２を前記汚水処理槽９内の低層に開口部１２ａが至るように設ける。
最後の前記中間ユニットＮの汚水流出口２６を前記汚水処理槽９の液面より上部に送水管２０を介して接続する。
【００４１】
原汚水管３から流入した汚水をユニットＵ及びそれに続く単数又は連結された複数個の中間ユニットＮで処理してから汚水処理槽９に導くことによって汚水処理槽９の汚水表面にスカムを発生させないようにする。
【００４２】
【作用】
本発明は上記構成であり、その作用を以下説明する。
汚水は内縦筒１内の第一室Ａに流入すると、その室内汚水の低層部へ空気を継続して注入することによって、気泡Ｋによりその汚水の全体が常時混濁状態に攪拌される。
通常では、浮遊物が水面に浮き上がり、膜状になった最表面が乾燥し、さらにその下部面に浮遊物が付着して厚い層を形成して塊（スカム）となるが、本発明では気泡Ｋによる継続攪拌によって浮遊物が内縦筒１内の水面に膜状化できなくなるのでスカム化が起こらなくなる。
【００４３】
その内縦筒１内の第一室Ａへの新たな汚水の流入によってその室内に水位変動が起こり、この変動で、第一室Ａが増水すると混濁汚水がその内縦筒１の第一室Ａの低部に設けた多数の流出孔２、２２を粗目濾しされて通過し、外縦筒５内の第二室Ｂ内に流れ出る。
【００４４】
そして、僅かであるが流入停止後の内縦筒１内の第一室Ａの汚水減少により、第一室Ａが減水するとすると外縦筒５内の第二室Ｂから混濁汚水がその第一室Ａの低部に設けた多数の流出孔２，２２を通過して第一室Ａにその量だけ戻ることになる。
このように、内縦筒１内の第一室Ａと外縦筒５内の第二室Ｂ間に汚水の流れが繰り返される。
【００４５】
その第一室Ａでの攪拌の影響は、流出孔２，２２を介して僅かに受けるが、一内縦筒１の壁面で応仕切られているので、外縦筒５内の第二室Ｂには殆ど攪拌はなされない。このため第二室Ｂ内ではその汚水がやや安静状態となり底部に重量汚泥分が擂鉢状部分に流出孔２，２２に向かって沈殿することになる。
【００４６】
このとき、外縦筒５内の第二室Ｂの低部における擂鉢状部分の状態は、堆積生成される軟質軽量沈殿物層が発生し、流入した汚水はその軟質軽量沈殿物層の下側からその沈殿物層の内部を通過してその上側に流れ出て行く。この際に、汚水の流れ出る圧力で軟質軽量沈殿物層がフアフアと少し浮き上がったり沈んだりしながら、そのままの状態で又はその表層部が噴出する汚水で破裂状態となって浮遊したりしながら上がったり下がったりを繰り返す。
【００４７】
そして、その汚水中の混濁物質は軟質軽量沈殿物層内に取り込まれ処理され、そこから流れ出た軟質軽量沈殿物層上の汚水は透明度が高められた汚水となる。
その汚水は、透明度が高まっていてもＢＯＤ値はまだ高いので、さらに、その第二室Ｂの水位の上昇分が第二室Ｂの前記汚水流出口６、２６から送水管１０、２０を介して次ぎの汚水処理槽９に導き入れられる。
【００４８】
この汚水処理槽９によって、さらに汚水のＢＯＤ値を低減させ排水規定値をクリアーできるまで処理されたら河川などに放水する。
また前記汚水処理槽９内の汚水の中にも多少の固形物の浮遊があり、それが汚水表面に浮上すると固形物同士が付着して膜状化する虞があるので、空気継続注入による気泡Ｋによる攪拌流によってその汚水上層を常時攪拌して固形物同士を分散化させ、表面スカムになるのを抑える。
また、空気継続注入によって微生物担体１１に生息する好気性微生物に酸素が供給されすみやかに汚泥分の分解が促進されることになる。
【００４９】
また、各図に示されているように、汚水流入口２、２４よりも汚水流出口６、２６を低くしたほうが汚水の段階的な流れを作る上からも好ましい。
なお、各図中の二点鎖線は汚水の水位を示すものである。
上記前記汚水処理槽９は、固定型の微生物担体１１が設置されている既存の合併浄化槽がそのまま利用することができる。
また、より処理リ能力を高めるために中間ユニットＮをそして処理規模に応じて複数個連設することができる。
【００５０】
【発明の効果】
本発明は以上のようであり、第一室Ａ内において、糞尿を含む流入汚水は継続攪拌により浮遊物が水面に集合化できなくなるのでスカム化が起こらない。したがってスカムから発生する特有の悪臭やうじ虫などの発生は解消される。
また、汚水が透明になるまで充分に処理がなされるので、さらに浄化処理するにしても後の浄化処理が容易となる。
【００５１】
即ち、本発明により、スカム除去処理のための管理が全く不要となり、また沈殿汚泥の引き抜き処理の回数も大幅に軽減される。このため、その処理に要する手間や費用の負担の削減が可能となる。
また、本発明は、既存の汚水処理槽の隣に組み込み設置することも可能であり、機能が不十分である既存の設備の改善にも大きく寄与することができるようになった。
【図面の簡単な説明】
【図１】本発明の汚水処理方法のフロー図。
【図２】別の形態の汚水処理方法のフロー図。
【図３】汚水処理装置の一部断面斜視図。
【図４】別の形態の汚水処理装置の一部断面斜視図。
【図５】複数ユニットを用いた装置を配置した状態を示す平面図。
【符号の説明】
１ 内縦筒
１ａ 内筒の上端部
１ｂ 内筒の下部周壁面
１ｃ 内筒の底部
２ 流出孔
３ 原汚水管
４ 汚水流入口
５ 外縦筒
５ａ 外筒の上端部
５ｂ 外筒の下端部
６ 汚水流出口
７ 送風機
８ 送気管
８ａ 送気管の空気注入口
９ 汚水処理槽
１０ 送水管
１１ 微生物担体
１２ 送気管
１２ａ 送気管の開口部
２１ 内筒
２１ａ 上端部
２１ｂ 下部周壁面
２１ｃ 内筒の底部
２２ 流出孔
２３ 送水管
２４ 汚水流入口
２５ 外筒
２５ａ 上端部
２５ｂ 下端部
２６ 汚水流出口
２７ 送風機
２８ 送気管
２８ａ 送気管の空気注入口
２０ 送水管
Ｕ ユニット
Ｎ 中間ユニット
Ａ 第一室
Ｂ 第二室
Ｋ 気泡[0001]
[Technical field to which the invention belongs]
The present invention relates to a method for purifying sewage such as manure discharged from a domestic flush toilet and a sewage treatment apparatus for carrying out the method.
[0002]
[Prior art]
Manure discharged from domestic flush toilets is sent to large-scale sewage treatment plants through sewage pipes in urban areas and purified to a certain standard before being discharged into rivers.
Also, in depopulated areas, it is promoted to install and process septic tanks for each village, and improvement works are being carried out in various places.
However, the construction of long-distance sewage pipes and large-scale merged tank facilities are expensive, and there are few areas where local governments and residents are working as planned in order to avoid new burdens. .
[0003]
In general, as a countermeasure against environmental pollutants, it is considered ideal to treat them at a pollution source rather than a collection process.
As treatment methods in individual houses that are the source of sewage, there are the seepage dredging method and the individual septic tank method, but sufficient treatment is not performed because the installation space of the facility cannot be secured or incomplete facilities are used. In many cases, discharge into rivers is also observed.
[0004]
In addition, even if the treatment is sufficiently performed, in order to maintain the treatment function, the removal of lump (scum) composed of light oil and fat components with low specific gravity generated on the water surface of the sewage tank and the extraction treatment of precipitated sludge are performed regularly. In some cases, the labor and cost required for the processing are large.
[0005]
In particular, until now, even if a method of deodorizing with a deodorant or the like has been used, the amount of generated malodor from scum has been large and continuously generated, so that it has not been possible to easily prevent it.
In addition, worms, which are larvae of insects such as moths, were generated on scum, and as such, they were unsanitary and were treated with insecticides.
[0006]
[Problems to be solved by the invention]
The present invention has been made in view of the above circumstances, and in a sewage tank installed mainly for individual households, it eliminates the occurrence of scum that accumulates and accumulates on the water surface and purifies the sewage. A scum eliminating sewage treatment method for obtaining clean treated water and a treatment apparatus for carrying out the method are provided.
[0007]
[Means for Solving the Problems]
The present invention for solving the above problems is a scum eliminating sewage treatment method and a scum eliminating sewage treating apparatus for carrying out the method.
[0008]
The sewage treatment method includes a one-time method and a plurality of repetition methods.
[0009]
First, a one-time sewage treatment method will be described.
About this sewage treatment method, the raw sewage is introduced into the first chamber A, and the entire interior sewage is constantly stirred in a turbid state by continuously injecting air into the lower layer of the first chamber A. The second chamber whose upper part is closed by suppressing the generation of surface scum and coarsely filtering the sewage agitated and turbid due to the fluctuation of the water level due to the inflow of raw sewage into the first chamber A from the sewage outflow hole 2 provided in the lower part of the chamber In the second chamber B, the sludge is settled in the second chamber B, so that heavy sludge is deposited on the bottom of the bowl formed in the chamber toward the outflow hole 2 .
Furthermore, the sewage whose transparency has increased in the room due to the fluctuation of the level of the sewage flowing into the second chamber B is discharged to the sewage treatment tank 9.
And by continuously injecting air into the sewage treatment tank 9, the sewage upper layer of the sewage treatment tank 9 is constantly stirred to suppress the occurrence of surface scum.
[0010]
Next, a sewage treatment method using a multiple repetition method will be described.
In this sewage treatment method, raw sewage is introduced into the first chamber A, and air is continuously injected into the lower layer portion of the first chamber A so that the entire interior sewage is constantly stirred into a turbid state, and the surface layer in the chamber suppressing the generation of the scum, the second chamber B to the upper and strained coarse stirring turbid sewage by water level fluctuations due to raw sewage flowing into the first chamber a from wastewater outlet hole 2 provided in the chamber lower section is closed To escape.
In the second chamber B, the sludge is settled on the bottom of the bowl-shaped bottom formed toward the outflow hole 2 in the chamber by bringing the sewage into a resting state.
[0011]
Furthermore, the sewage whose transparency has increased in the room due to the fluctuation of the level of the sewage flowing into the second chamber B is introduced into the next first chamber A, and air is continuously injected into the lower layer of the first chamber A. The entire interior sewage is constantly agitated to suppress the generation of surface scum, and the turbid sewage agitated due to the fluctuation of the water level due to the inflow of the original sewage into the first chamber A It is coarsely filtered from the provided sewage outflow hole 22 and escaped to the second chamber B.
In the second chamber B, the sewage is brought into a resting state to precipitate heavy sludge on the mortar-like bottom of the chamber, and the processing in the first chamber A and the second chamber B is repeated as it is.
[0012]
Due to the fluctuation of the water level of the sewage flowing into the final second chamber B, the sewage whose transparency is increased is discharged into the sewage treatment tank 9.
And by continuously injecting air into the sewage treatment tank 9, the sewage upper layer of the sewage treatment tank 9 is constantly stirred to suppress the occurrence of surface scum.
[0013]
Moreover, the scum elimination type | formula sewage treatment apparatus for implementing the said scum elimination type | mold wastewater treatment method has the form which uses a unit, and the form which uses multiple units.
[0014]
First, the form of the sewage treatment apparatus using a single unit will be described.
The form of this apparatus is an inner vertical cylinder 1 provided with a sewage inlet 4 to which an upper end 1a is opened and a plurality of outflow holes 2 are provided in a lower peripheral wall 1b, and a raw sewage pipe 3 is connected to the upper end 1a. And a sewage outlet 6 that surrounds the inner vertical cylinder 1 and whose upper end 5a is closed at the lower part of the opening of the inner vertical cylinder 1 and whose lower end 5b is closed in a bowl shape, and opens to the upper end 5a. A unit U is constituted by the provided outer vertical cylinder 5 and the air supply pipe 8 with the blower 7 inserted from the upper end 1a of the inner vertical cylinder 1 to the vicinity of the bottom 1c.
Then, this unit U is installed next to the sewage treatment tank 9.
[0015]
The microbial carrier 11 is embedded in the middle layer in the sewage treatment tank 9, and the air supply pipe 12 with the blower 7 is provided so that the opening 12 a reaches the lower layer in the sewage treatment tank 9. The outlet 6 is connected to the upper part of the liquid level of the sewage treatment tank 9 through a water pipe 10.
[0016]
Then, the sewage flowing from the raw sewage pipe 3 is treated by the unit U and then guided to the sewage treatment tank 9 so that scum is not generated on the sewage surface of the sewage treatment tank 9.
[0017]
Next, the form of the sewage treatment apparatus using a plurality of units will be described.
The form of this apparatus is an inner vertical cylinder 1 provided with a sewage inlet 4 to which an upper end 1a is opened and a plurality of outflow holes 2 are provided in a lower peripheral wall 1b, and a raw sewage pipe 3 is connected to the upper end 1a. And a sewage outlet 6 that surrounds the inner vertical cylinder 1 and whose upper end 5a is closed at the lower part of the opening of the inner vertical cylinder 1 and whose lower end 5b is closed in a bowl shape, and opens to the upper end 5a. A unit U is constituted by the provided outer vertical cylinder 5 and the air supply pipe 8 with the blower 7 inserted from the upper end 1a of the inner vertical cylinder 1 to the vicinity of the bottom 1c.
[0018]
Further, an inner vertical cylinder 21 provided with a sewage inlet 24 having an open upper end 21a and a plurality of outflow holes 22 in the lower peripheral wall surface 21b and connected to a water supply pipe 23 near the upper end 21a, An outer vertical cylinder that surrounds the cylinder 21 and has an upper end 25a closed at the lower part of the opening of the inner vertical cylinder 21 and a lower end 25b closed in a mortar shape, and a sewage outlet 26 opened to the outside near the upper end 25a. 25 and an air supply pipe 28 with a blower 27 inserted near the bottom 21c from the upper end 21a of the inner vertical cylinder 21 constitutes an intermediate unit N.
Then, a single intermediate unit N or a plurality of the sewage outlets 26 connected to the sewage outlets 26 through the water pipes 23 are connected to the sewage outlet 6 of the unit U for the first intermediate unit N. Inlet 24 is connected.
[0019]
The unit U and the intermediate unit N are installed next to the sewage treatment tank 9.
In addition, the microorganism carrier 11 is embedded in the middle layer in the sewage treatment tank 9, and the air supply pipe 12 with the blower 7 is provided so that the opening 12 a reaches the lower layer in the sewage treatment tank 9.
And the sewage outflow port 26 of the last said intermediate unit N is connected and comprised via the water pipe 20 from the liquid level of the said sewage treatment tank 9 to the upper part.
[0020]
Then, the sewage is introduced into the sewage treatment tank 9 by treating the sewage flowing from the raw sewage pipe 3 with the unit U and the subsequent single unit or a plurality of connected intermediate units N and then guiding it to the sewage treatment tank 9. Do not generate.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of a scum eliminating sewage treatment apparatus and a scum eliminating sewage treating apparatus for carrying out the method of the present invention will be described in detail below based on examples of the drawings.
[0022]
First, the scum elimination sewage treatment method will be described.
[0023]
There are one processing method and one repetition method.
[0024]
First, as shown in the flow diagram of FIG. 1, the one-time system introduces the raw sewage into the first chamber A, and continuously injects air into the lower layer of the first chamber A, so that Is constantly agitated to suppress the generation of surface scum in the room.
And, the sewage agitated and turbid due to the fluctuation of the water level due to the inflow of the raw sewage into the first chamber A is coarsely filtered from the sewage outflow hole 2 provided in the lower part of the room and is released to the second chamber B.
In the second chamber B, the sludge is settled at the bottom of the mortar-like bottom of the chamber by bringing the sewage into a resting state.
[0025]
Furthermore, the sewage whose transparency has been increased due to the fluctuation of the level of the sewage flowing into the second chamber B is discharged to a sewage treatment tank 9 which is generally used.
By continuously injecting air into the sewage treatment tank 9, the sewage upper layer of the sewage treatment tank 9 is constantly stirred to suppress the occurrence of surface scum.
[0026]
Next, for the multiple repetition method, as shown in the flow diagram of FIG. 2, the whole raw sewage is introduced by introducing raw sewage into the first chamber A and continuously injecting air into the lower layer of the first chamber A. To constantly suppress the generation of surface scum in the room,
The sewage agitated and turbid due to the fluctuation of the water level due to the inflow of the raw sewage into the first chamber A is coarsely filtered from the sewage outflow hole 2 provided in the lower part of the room and is released to the second chamber B.
In the second chamber B, the sludge is settled at the bottom of the mortar-like bottom of the chamber by bringing the sewage into a resting state.
[0027]
Furthermore, the sewage whose transparency has increased in the room due to the fluctuation of the level of the sewage flowing into the second chamber B is introduced into the next first chamber A, and air is continuously injected into the lower layer of the first chamber A. By doing so, the whole indoor sewage is constantly stirred into a turbid state to suppress generation of surface scum in the room.
[0028]
The sewage agitated and turbid due to the fluctuation of the water level due to the inflow of the raw sewage into the first chamber A is coarsely filtered from the sewage outflow hole 22 provided in the lower part of the room and released into the second chamber B.
In the second chamber B, the sludge is put in a resting state to cause heavy sludge to settle at the bottom of the mortar-like shape in the chamber, and the treatment in the first chamber A and the second chamber B is repeated as it is.
[0029]
Due to fluctuations in the level of the sewage flowing into the final second chamber B, the sewage whose transparency has been increased is discharged into a sewage treatment tank 9 which is generally used.
By continuously injecting air into the sewage treatment tank 9, the sewage upper layer of the sewage treatment tank 9 is constantly stirred to suppress the occurrence of surface scum.
[0030]
Moreover, the scum elimination type sewage treatment apparatus for carrying out the scum elimination type sewage treatment method has a mode in which a single unit is used and a mode in which a plurality of units are used corresponding to the above methods.
[0031]
First, as for the form of the apparatus using a single unit, as shown in FIG. 3, the upper end 1a is open, the lower peripheral wall surface 1b has a large number of outflow holes 2, and the raw sewage pipe 3 near the upper end 1a. An inner vertical cylinder 1 provided with a sewage inlet 4 connected to the inner vertical cylinder 1 and surrounding the inner vertical cylinder 1, the upper end 5a is closed at the lower part of the opening of the inner vertical cylinder 1, and the lower end 5b is closed in a bowl shape, For the purpose of stirring the whole sewage in the inner vertical cylinder 1 from the upper end 1a of the inner vertical cylinder 1 to the bottom 1c, the outer vertical cylinder 5 provided with a sewage outlet 6 that opens to the outside near the upper end 5a. The unit U is formed by the air supply pipe 8 with the blower 7 which is inserted and the leading air inlet 8a is opened at the bottom 1c of the inner vertical cylinder 1.
[0032]
Therefore, in the unit U, the first chamber A is formed in the inner vertical cylinder 1, and the second chamber B is formed outside the peripheral wall surface of the inner vertical cylinder 1 and in the outer vertical cylinder 5. .
The first chamber A and the second chamber B are in communication with each other by a large number of outflow holes 2 such as a mesh, a slit group, and a small hole group provided on the peripheral surface of the lower end portion of the inner vertical cylinder 1.
[0033]
Then, the unit U is installed next to the sewage treatment tank 9.
[0034]
The microbial carrier 11 is embedded in the middle layer in the sewage treatment tank 9, and the air supply pipe 12 with the blower 7 is provided so that the opening 12 a reaches the lower layer in the sewage treatment tank 9. 6 is connected to the upper part from the liquid level of the sewage treatment tank 9 through a water pipe 10.
[0035]
The air injection into the sewage treatment tank 9 is performed by supplying oxygen to the microbial carrier 11 installed and dispersing solids floating on the surface of the sewage in the sewage treatment tank 9 so that the solids adhere to each other. The purpose is to stir the upper part of the sewage to prevent it.
[0036]
The waste water flowing from the raw waste water pipe 3 is treated by the unit U and then guided to the waste water treatment tank 9 so that scum is not generated on the waste water surface of the waste water treatment tank 9.
[0037]
Next, as shown in FIG. 4, as for the form of the apparatus using a plurality of units, the upper end 1a is open and the lower peripheral wall surface 1b has a large number of outflow holes 2, and the raw sewage pipe 3 is placed near the upper end 1a. An inner vertical cylinder 1 provided with a connected sewage inlet 4, an inner vertical cylinder 1 surrounding the inner vertical cylinder 1, and an upper end 5 a closed at the lower part of the opening of the inner vertical cylinder 1, and a lower end 5 b closed in a bowl shape, the upper end thereof The unit U is composed of an outer vertical cylinder 5 provided with a sewage outlet 6 that opens to the outside of the part 5a, and an air supply pipe 8 with a blower 7 inserted from the upper end 1a of the inner vertical cylinder 1 to the bottom 1c. Form.
[0038]
Further, an inner vertical cylinder 21 provided with a sewage inlet 24 having an open upper end 21a and a plurality of outflow holes 22 in the lower peripheral wall surface 21b and connected to a water supply pipe 23 near the upper end 21a, An outer vertical cylinder that surrounds the cylinder 21 and has an upper end 25a closed at the lower part of the opening of the inner vertical cylinder 21 and a lower end 25b closed in a mortar shape, and a sewage outlet 26 opened to the outside near the upper end 25a. 25 and an air supply pipe 28 with a blower 27 inserted near the bottom 21c from the upper end 21a of the inner vertical cylinder 21 forms an intermediate unit N.
[0039]
Then, a single intermediate unit N or a plurality of the sewage outlets 26 connected to the next sewage outlets 24 through the water supply pipes 23 (FIG. 5A shows one unit U and one intermediate unit N each. (B) is a mode in which one unit U is used and two intermediate units N are used). The sewage inlet 24 of the first intermediate unit N is connected to the sewage outlet 6 of the unit U.
The unit U and the intermediate unit N are installed next to the sewage treatment tank 9.
[0040]
The microbial carrier 11 is embedded in the middle layer in the sewage treatment tank 9, and the air supply pipe 12 with the blower 7 is provided so that the opening 12 a reaches the lower layer in the sewage treatment tank 9.
The sewage outlet 26 of the last intermediate unit N is connected to the upper part of the sewage treatment tank 9 from the liquid level via the water pipe 20.
[0041]
By treating the sewage flowing from the raw sewage pipe 3 with the unit U and the subsequent single unit or a plurality of intermediate units N connected thereto, the sewage is not generated on the sewage surface of the sewage treatment tank 9 by being guided to the sewage treatment tank 9. Like that.
[0042]
[Action]
The present invention has the above-described configuration, and its operation will be described below.
When the sewage flows into the first chamber A in the inner vertical cylinder 1, the entire sewage is constantly stirred in a turbid state by the bubbles K by continuously injecting air into the lower layer of the indoor sewage.
Normally, suspended matter floats on the water surface, the outermost surface in the form of a film is dried, and the suspended matter adheres to the lower surface to form a thick layer to form a lump (scum). Since the suspended matter cannot be formed into a film on the water surface in the inner vertical cylinder 1 by continuous stirring by K, scum is not generated.
[0043]
Due to the inflow of new sewage into the first chamber A in the inner vertical cylinder 1, the water level fluctuates in the room, and when the first chamber A increases due to this fluctuation, the turbid sewage becomes the first chamber of the inner vertical cylinder 1. A large number of outflow holes 2, 22 provided in the lower part of A are coarsely filtered and flow into the second chamber B in the outer vertical cylinder 5.
[0044]
If the first chamber A is reduced due to a decrease in the amount of sewage in the first chamber A in the inner vertical cylinder 1 after the inflow is stopped, the turbid sewage is first from the second chamber B in the outer vertical cylinder 5. It passes through the many outflow holes 2 and 22 provided in the lower part of the chamber A and returns to the first chamber A by that amount.
Thus, the flow of sewage is repeated between the first chamber A in the inner vertical cylinder 1 and the second chamber B in the outer vertical cylinder 5.
[0045]
Although the influence of the stirring in the first chamber A is slightly received through the outflow holes 2 and 22, the second chamber B in the outer vertical cylinder 5 is partitioned by the wall surface of the inner vertical cylinder 1. There is almost no stirring. For this reason, in the second chamber B, the sewage is slightly rested, and the heavy sludge settles toward the outflow holes 2 and 22 in the mortar-like portion at the bottom.
[0046]
At this time, the state of the mortar-like part in the lower part of the second chamber B in the outer vertical cylinder 5 is that a soft and light sediment layer is generated and deposited, and the inflowing sewage is below the soft and light sediment layer. From the inside of the sediment layer to the upper side. At this time, the soft and lightweight sediment layer slightly floats and sinks due to the pressure of the sewage flowing out, and rises and falls while remaining as it is or in a ruptured state with the sewage squirting from the surface layer. Repeat.
[0047]
Then, the turbid substance in the sewage is taken in and processed in the soft and light sediment layer, and the sewage on the soft and light sediment layer flowing out of the sewage becomes sewage with increased transparency.
Even if the sewage has increased transparency, the BOD value is still high. Further, the rise in the water level of the second chamber B is further fed from the sewage outlets 6 and 26 of the second chamber B through the water pipes 10 and 20. To the next sewage treatment tank 9.
[0048]
When the sewage treatment tank 9 further reduces the BOD value of the sewage until the sewage regulation value is cleared, the sewage treatment tank 9 discharges the water to a river.
In addition, there is some solid floating in the sewage in the sewage treatment tank 9, and when it floats on the surface of the sewage, there is a possibility that the solids adhere to each other and form a film. The sewage upper layer is constantly stirred by the stirring flow of K to disperse the solids and suppress surface scum.
In addition, oxygen is supplied to the aerobic microorganisms that inhabit the microorganism carrier 11 by continuous air injection, and the decomposition of the sludge is immediately promoted.
[0049]
Moreover, as shown in each figure, it is preferable to make the sewage outlets 6 and 26 lower than the sewage inlets 2 and 24 from the viewpoint of creating a gradual flow of sewage.
In addition, the dashed-two dotted line in each figure shows the water level of sewage.
As the sewage treatment tank 9, an existing combined septic tank in which a fixed microbial carrier 11 is installed can be used as it is.
Further, a plurality of intermediate units N can be connected in accordance with the processing scale in order to further increase the processing capacity.
[0050]
【The invention's effect】
The present invention is as described above. In the first chamber A, the inflowing sewage containing feces and urine does not scumate because suspended matters cannot be collected on the water surface by continuous stirring. Therefore, the occurrence of peculiar odors and maggots generated from scum is eliminated.
Further, since the treatment is sufficiently performed until the sewage becomes transparent, the subsequent purification treatment is facilitated even if the purification treatment is further performed.
[0051]
That is, according to the present invention, the management for the scum removing process becomes completely unnecessary, and the number of times of the precipitated sludge extraction process is greatly reduced. For this reason, it is possible to reduce the labor and cost burden required for the processing.
Further, the present invention can be installed next to an existing sewage treatment tank, and can greatly contribute to the improvement of existing facilities having insufficient functions.
[Brief description of the drawings]
FIG. 1 is a flowchart of a sewage treatment method according to the present invention.
FIG. 2 is a flowchart of another embodiment of a sewage treatment method.
FIG. 3 is a partial cross-sectional perspective view of the sewage treatment apparatus.
FIG. 4 is a partial cross-sectional perspective view of another embodiment of a wastewater treatment apparatus.
FIG. 5 is a plan view showing a state in which an apparatus using a plurality of units is arranged.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Inner vertical cylinder 1a Upper end 1b of inner cylinder Lower peripheral wall surface 1c of inner cylinder Bottom 2 of inner cylinder Outlet 3 Raw sewage pipe 4 Sewage inlet 5 Outer vertical cylinder 5a Upper end 5b of outer cylinder Lower end 6 of outer cylinder Sewage outlet 7 Blower 8 Air pipe 8a Air inlet 9 of the air pipe Sewage treatment tank 10 Water pipe 11 Microbial carrier 12 Air pipe 12a Air pipe opening 21 Inner cylinder 21a Upper end 21b Lower peripheral wall surface 21c Inner cylinder bottom 22 Outflow hole 23 Water supply pipe 24 Sewage inlet 25 Outer cylinder 25a Upper end 25b Lower end 26 Sewage outlet 27 Blower 28 Air supply pipe 28a Air inlet of air supply pipe 20 Water supply pipe U Unit N Intermediate unit A First chamber B Second chamber K bubble

Claims (4)

原汚水を第一室（Ａ）に導き入れ、その第一室（Ａ）の低層部へ空気を継続注入することによってその室内汚水の全体を常時混濁状態に攪拌してその室内の表層スカムの発生を抑え、
その第一室（Ａ）への原汚水流入による水位変動により攪拌混濁した汚水をその室内低部に設けた汚水流出孔（２）から粗目濾しして上部が閉じられた第二室（Ｂ）に逃がし、
その第二室（Ｂ）ではその汚水を安静状態にすることによってその室内の前記流出孔（２）に向かって形成された擂鉢状底部に重量汚泥分を沈殿させ、
さらに、その第二室（Ｂ）へ流入する汚水の水位変動によりその室内の透明度の上がった汚水を汚水処理槽（９）に排出し、
その汚水処理槽（９）へ空気を継続して注入することによってその汚水処理槽（９）の汚水上層を常時攪拌して表面スカムの発生を抑えることを特徴とするスカム解消型汚水処理方法。By introducing raw sewage into the first chamber (A) and continuously injecting air into the lower part of the first chamber (A), the entire indoor sewage is constantly stirred into a turbid state and the surface scum of the room Suppress the occurrence,
The second chamber (B) whose upper part is closed by coarsely filtering the sewage agitated and turbid due to the fluctuation of the water level due to the inflow of raw sewage into the first chamber (A) from the sewage outflow hole (2) provided in the lower part of the chamber To escape,
In the second chamber (B), the sludge content is settled on the mortar-shaped bottom formed toward the outflow hole (2) in the chamber by putting the sewage in a resting state,
Furthermore, the sewage whose transparency has been increased due to fluctuations in the level of the sewage flowing into the second chamber (B) is discharged to the sewage treatment tank (9),
A scum-resolving sewage treatment method characterized in that the sewage upper layer of the sewage treatment tank (9) is constantly stirred by continuously injecting air into the sewage treatment tank (9) to suppress generation of surface scum. 原汚水を第一室（Ａ）に導き入れ、その第一室（Ａ）の低層部へ空気を継続注入することによってその室内汚水の全体を常時混濁状態に攪拌してその室内の表層スカムの発生を抑え、
その第一室（Ａ）への原汚水流入による水位変動により攪拌混濁した汚水をその室内低部に設けた汚水流出孔（２）から粗目濾しして上部が閉じられた第二室（Ｂ）に逃がし、
その第二室（Ｂ）ではその汚水を安静状態にすることによってその室内の前記流出孔（２）に向かって形成された擂鉢状底部に重量汚泥分を沈殿させ、
さらに、その第二室（Ｂ）へ流入する汚水の水位変動によりその室内の透明度の上がった汚水を次ぎの第一室（Ａ）に導き入れ、その流入汚水を第一室（Ａ）の低層部へ空気を継続注入することによってその室内汚水の全体を常時混濁状態に攪拌してその室内の表層スカムの発生を抑え、
その第一室（Ａ）への原汚水流入による水位変動により攪拌混濁した汚水をその室内低部に設けた汚水流出孔（２２）から粗目濾しして第二室（Ｂ）に逃がし、
その第二室（Ｂ）ではその汚水を安静状態にすることによってその室内の擂鉢状底部に重量汚泥分を沈殿させ、そのまま又は前記第一室（Ａ）と前記第二室（Ｂ）の処理を繰り返し、
最後の第二室（Ｂ）へ流入する汚水の水位変動によりその室内の透明度の上がった汚水を汚水処理槽（９）に排出し、
その汚水処理槽（９）へ空気を継続して注入することによってその汚水処理槽（９）の汚水上層を常時攪拌して表面スカムの発生を抑えることを特徴とするスカム解消型汚水処理方法。By introducing raw sewage into the first chamber (A) and continuously injecting air into the lower part of the first chamber (A), the entire indoor sewage is constantly stirred into a turbid state and the surface scum of the room Suppress the occurrence,
The second chamber (B) whose upper part is closed by coarsely filtering the sewage agitated and turbid due to the fluctuation of the water level due to the inflow of raw sewage into the first chamber (A) from the sewage outflow hole (2) provided in the lower part of the chamber To escape,
In the second chamber (B), the sludge content is settled on the mortar-shaped bottom formed toward the outflow hole (2) in the chamber by putting the sewage in a resting state,
Further, the sewage whose transparency is increased due to the fluctuation of the level of the sewage flowing into the second chamber (B) is introduced into the next first chamber (A), and the inflow sewage is introduced into the lower layer of the first chamber (A). By continuously injecting air into the part, the whole indoor sewage is constantly stirred into a turbid state to suppress the occurrence of surface scum in the room,
The sewage agitated and turbid due to the fluctuation of the water level due to the inflow of raw sewage into the first chamber (A) is coarsely filtered from the sewage outflow hole (22) provided in the lower part of the chamber and released into the second chamber (B).
In the second chamber (B), the sludge is put into a resting state to precipitate heavy sludge at the bottom of the mortar-like shape in the chamber, either as it is or in the treatment of the first chamber (A) and the second chamber (B). Repeat
The sewage whose transparency has been increased due to fluctuations in the level of the sewage flowing into the final second chamber (B) is discharged into the sewage treatment tank (9),
A scum-resolving sewage treatment method characterized in that the sewage upper layer of the sewage treatment tank (9) is constantly stirred by continuously injecting air into the sewage treatment tank (9) to suppress generation of surface scum. 上端部（１ａ）が開き且つ下部周壁面（１ｂ）に多数の流出孔（２）を有し、上端部（１ａ）寄りには原汚水管（３）を接続した汚水流入口（４）を設けた内縦筒（１）と、
その内筒（１）を囲い且つ上端部（５ａ）が内縦筒（１）の開口の下部で閉じ、また下端部（５ｂ）が擂鉢状に閉じ、その上端部（５ａ）寄りには外に開く汚水流出口（６）を設けた外縦筒（５）と、
前記内縦筒（１）の上端部（１ａ）から底部（１ｃ）近くに差し込まれた送風機（７）付の送気管（８）と、
から成るユニット（Ｕ）を、汚水処理槽（９）の隣に設置し、
前記汚水処理槽（９）内の中層に微生物担体（１１）を埋設するとともに、送風機（７）付の送気管（８）を前記汚水処理槽（９）内の低層に開口部するように設け、
前記ユニット（Ｕ）の汚水流出口（６）を前記汚水処理槽（９）の液面より上部に送水管（１０）を介して接続して成り、
原汚水管（３）から流入した汚水をユニット（Ｕ）で処理してから汚水処理槽（９）に導くことによって汚水処理槽（９）の汚水表面にスカムを発生させないようにしたことを特徴とする請求項１に記載の方法を実施するためのスカム解消型汚水処理装置。A sewage inlet (4) having an upper end (1a) opened and a plurality of outflow holes (2) in the lower peripheral wall surface (1b), and a raw sewage pipe (3) connected to the upper end (1a). The provided inner vertical cylinder (1),
Surrounding the inner cylinder (1), the upper end (5a) is closed at the lower part of the opening of the inner vertical cylinder (1), the lower end (5b) is closed in a bowl shape, and the outer end is close to the upper end (5a). An outer vertical cylinder (5) provided with a sewage outlet (6) that opens to
An air supply pipe (8) with a blower (7) inserted near the bottom (1c) from the upper end (1a) of the inner vertical cylinder (1);
A unit (U) consisting of: next to the sewage treatment tank (9),
The microorganism carrier (11) is embedded in the middle layer in the sewage treatment tank (9), and an air supply pipe (8) with a blower (7) is provided so as to open in a lower layer in the sewage treatment tank (9). ,
The sewage outlet (6) of the unit (U) is connected to the upper part from the liquid level of the sewage treatment tank (9) through a water pipe (10),
Sewage flowing from the raw sewage pipe (3) is treated by the unit (U) and then guided to the sewage treatment tank (9) so that scum is not generated on the sewage surface of the sewage treatment tank (9). A scum eliminating sewage treatment apparatus for carrying out the method according to claim 1. 上端部（１ａ）が開き且つ下部周壁面（１ｂ）に多数の流出孔（２）を有し、上端部（１ａ）寄りには原汚水管（３）を接続した汚水流入口（４）を設けた内縦筒（１）と、
その内縦筒（１）を囲い且つ上端部（５ａ）が内縦筒（１）の開口の下部で閉じ、また下端部（５ｂ）が擂鉢状に閉じ、その上端部（５ａ）寄りには外に開く汚水流出口（６）を設けた外縦筒（５）と、
前記内縦筒（１）の上端部（１ａ）から底部（１ｃ）近くに差し込まれた送風機（７）付の送気管（８）とから成るユニット（Ｕ）と、
上端部（２１ａ）が開き且つ下部周壁面（２１ｂ）に多数の流出孔（２２）を有し、上端部（２１ａ）寄りには送水管（２３）を接続した汚水流入口（２４）を設けた内縦筒（２１）と、
その内縦筒（２１）を囲い且つ上端部（２５ａ）が内縦筒（２１）の開口の下部で閉じ、また下端部（２５ｂ）が擂鉢状に閉じ、その上端部（２５ａ）寄りには外に開く汚水流出口（２６）を設けた外縦筒（２５）と、
前記内縦筒（２１）の上端部（２１ａ）から底部（２１ｃ）近くに差し込まれた送風機（２７）付の送気管（２８）とから成る中間ユニット（Ｎ）の単数又は前記汚水流出口（２６）に次ぎの汚水流入口（２４）を送水管（２３）を介して接続した複数個を、
前記ユニット（Ｕ）の汚水流出口（６）に最初の中間ユニット（Ｎ）の汚水流入口（２４）を接続し、
前記ユニット（Ｕ）及び中間ユニット（Ｎ）を汚水処理槽（９）の隣に設置し、
前記汚水処理槽（９）内の中層に微生物担体（１１）を埋設するとともに、送風機（７）付の送気管（８）を前記汚水処理槽（９）内の低層に開口部するように設け、
最後の前記中間ユニット（Ｎ）の汚水流出口（２６）を前記汚水処理槽（９）の液面より上部に送水管（２０）を介して接続して成り、
原汚水管（３）から流入した汚水をユニット（Ｕ）及びそれに続く単数又は連結された複数個の中間ユニット（Ｎ）で処理してから汚水処理槽（９）に導くことによって汚水処理槽（９）の汚水表面にスカムを発生させないようにしたことを特徴とする請求項２に記載の方法を実施するためのスカム解消型汚水処理装置。A sewage inlet (4) having an upper end (1a) opened and a plurality of outflow holes (2) in the lower peripheral wall surface (1b), and a raw sewage pipe (3) connected to the upper end (1a). The provided inner vertical cylinder (1),
Surrounding the inner vertical cylinder (1), the upper end (5a) is closed at the lower part of the opening of the inner vertical cylinder (1), the lower end (5b) is closed in a bowl shape, and the upper end (5a) is closer to the upper end (5a). An outer vertical cylinder (5) provided with a sewage outlet (6) that opens to the outside;
A unit (U) comprising an air supply pipe (8) with a blower (7) inserted near the bottom (1c) from the upper end (1a) of the inner vertical cylinder (1);
The upper end (21a) is open and the lower peripheral wall surface (21b) has a number of outflow holes (22), and a sewage inflow port (24) connected with a water pipe (23) is provided near the upper end (21a). Inner vertical cylinder (21),
Surrounding the inner vertical cylinder (21), the upper end (25a) is closed at the lower part of the opening of the inner vertical cylinder (21), the lower end (25b) is closed in a bowl shape, and the upper end (25a) is closer to the upper end (25a). An outer vertical cylinder (25) provided with a sewage outlet (26) that opens to the outside;
A single intermediate unit (N) consisting of an air pipe (28) with a blower (27) inserted near the bottom (21c) from the upper end (21a) of the inner vertical cylinder (21) or the sewage outlet ( 26) a plurality of sewage inlets (24) next to each other connected via a water pipe (23),
Connecting the sewage inlet (24) of the first intermediate unit (N) to the sewage outlet (6) of the unit (U);
Install the unit (U) and the intermediate unit (N) next to the sewage treatment tank (9),
The microorganism carrier (11) is embedded in the middle layer in the sewage treatment tank (9), and an air supply pipe (8) with a blower (7) is provided so as to open in a lower layer in the sewage treatment tank (9). ,
The sewage outlet (26) of the last intermediate unit (N) is connected to the upper part from the liquid level of the sewage treatment tank (9) via a water pipe (20),
By treating the sewage flowing from the raw sewage pipe (3) with the unit (U) and the subsequent single unit or a plurality of connected intermediate units (N), the sewage treatment tank (9) is guided to the sewage treatment tank (9). The scum eliminating sewage treatment apparatus for carrying out the method according to claim 2, wherein scum is not generated on the sewage surface of 9).
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