JP2004255237A - Sewage purification method and apparatus - Google Patents

Sewage purification method and apparatus Download PDF

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JP2004255237A
JP2004255237A JP2003045920A JP2003045920A JP2004255237A JP 2004255237 A JP2004255237 A JP 2004255237A JP 2003045920 A JP2003045920 A JP 2003045920A JP 2003045920 A JP2003045920 A JP 2003045920A JP 2004255237 A JP2004255237 A JP 2004255237A
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sewage
tank
anaerobic
filter medium
chamber
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JP2004255237A5 (en
JP4142467B2 (en
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Tadayuki Izumi
忠行 泉
Takane Kitao
高嶺 北尾
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Daiki Co Ltd
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Daiki Co Ltd
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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

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Abstract

【課題】嫌気濾床槽における汚水の処理効率を高め、嫌気濾床槽の省容量化を図り、嫌気濾床槽の構造も簡単にできる。
【解決手段】紐状濾材１３を配設した嫌気濾床槽１内に少なくとも汚水流入側室７と汚水流出側室９とに仕切る仕切り壁４，５を設け、この仕切り壁４，５に複数の整流孔１０を形成し、前記嫌気濾床槽１内に流入した汚水を仕切り壁４，５の整流孔１０にて整流しながら汚水流入側室７から汚水流出側室９に向って嫌気濾床槽１内を水平方向に流動させ、この嫌気濾床槽１内に配設した濾材１３に接触させながら汚水を嫌気性菌による生物分解を行う。紐状濾材１３は嫌気濾床槽１内に上下方向に汚水面から槽底面まで配列することができ、紐状濾材１３と浮上物，沈殿汚泥との接触効率が高く、生物分解が効率よくでき、浮上物、沈殿汚泥の堆積量が少なくなる。
【選択図】 図１An object of the present invention is to improve the efficiency of sewage treatment in an anaerobic filter tank, reduce the capacity of the anaerobic filter tank, and simplify the structure of the anaerobic filter tank.
Kind Code: A1 Abstract: Partition walls (4, 5) are provided in an anaerobic filter bed tank (1) provided with a string-shaped filter medium (13), and partition at least into a sewage inflow side chamber (7) and a sewage outflow side chamber (9). A hole 10 is formed, and the sewage flowing into the anaerobic filter bed tank 1 is rectified by the rectifying holes 10 of the partition walls 4 and 5 from the sewage inflow side chamber 7 to the sewage outflow side chamber 9 in the anaerobic filter bed tank 1. Is flowed in the horizontal direction, and the sewage is subjected to biodegradation by anaerobic bacteria while contacting the filter medium 13 disposed in the anaerobic filter bed tank 1. The string-shaped filter medium 13 can be vertically arranged in the anaerobic filter bed tank 1 from the sewage surface to the tank bottom, and the efficiency of contact between the string-shaped filter medium 13 and floating matters and settled sludge is high, and biodegradation can be performed efficiently. The amount of suspended matter and sediment sludge is reduced.
[Selection diagram] Fig. 1

Description

【０００１】
【発明の属する技術分野】
本発明は、嫌気濾床槽内にて汚水中の汚泥を嫌気性菌により分解を行う汚水浄化方法及びその装置に関する。
【０００２】
【従来の技術】
従来のこの種の汚水浄化装置は、汚水の短絡流を防止するために、嫌気濾床槽内を汚水流入側と汚水流出側とを仕切り壁にて第１室と第２室とに仕切り、この嫌気濾床槽の第１室と第２室とにそれぞれ濾材を配設し、この第１室の流入側上部に設けた汚水流入部から流入した汚水は、下降流となって流動し、濾材にて汚水中の夾雑物、浮遊物が捕捉されるとともにこの濾材に捕捉された汚泥などは濾材の表面などに生育する嫌気性菌などによって分解され、この第１室の底部に至った汚水は、仕切り壁に沿って形成された流路を上昇流となって流動し、この仕切り壁の上部に形成した移流部から前記第２室の上部に流入し、この第２室に流入した汚水は下降流となって流動し、この第２室の底部に至った汚水は第２室の底部から上昇流となって流動し、この上昇流となった汚水中の前記第１室の濾材にて捕捉されなかった夾雑物、浮遊物が第２室の濾材にて捕捉されるとともにこの濾材に捕捉された汚泥などは濾材の表面などに生育する嫌気性菌などによって分解され、第２室の上部に至った汚水はこの第２室の流出側上部に設けた汚水流出部から接触曝気槽に流入し、この接触曝気槽に流入した汚水は、この接触曝気槽に配設した接触材の表面などに生育する好気性微生物などにて分解され、この接触曝気槽の底部に至った汚水はこの接触曝気槽内に形成した沈殿室に流動し、この沈殿室に流入した汚水の上澄水は処理水となって消毒されて放流され構成が採られている（例えば、特許文献１、特許文献２参照。）。
【０００３】
【特許文献１】
特開平２０００−１８９９８３号公報（第２頁―第３頁、図１）
【０００４】
【特許文献２】
特開平６―６３５７４号公報（第２頁―第３頁、図１）
【０００５】
【発明が解決しようとする課題】
従来の汚水浄化装置では、嫌気濾床槽内に適宜に濾材を充填し、汚水は嫌気濾床槽内を下降流、上昇流の上下流となっているため、嫌気濾床槽に設けた濾材の下部に汚泥が堆積し、また、嫌気濾床槽の上部には浮上物が浮遊し、沈殿汚泥、浮上物などを貯留する部分には濾材を設けることができず、濾材は、嫌気濾床槽の浮上物が溜まる汚水面の近傍及び沈殿汚泥が溜まる槽底面の近傍には濾材を設けることができず、濾材は嫌気濾床槽の中間部のみに配設できるものであり，また、汚水流入部、移流部、汚水流出部などに清掃口を設ける必要があり、嫌気濾床槽内に汚水処理の無効部分が生じ、嫌気濾床槽内の深さに比し処理効率が悪い問題があった。
【０００６】
本発明は上記問題点に鑑みなされたもので、嫌気濾床槽における汚水の処理効率がよく、嫌気濾床槽の省容量化が図れる汚水浄化方法及びその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】
請求項１記載の発明の汚水浄化方法は、濾材を配設した嫌気濾床槽内に少なくとも汚水流入側室と汚水流出側室とに仕切る仕切り壁を設け、この仕切り壁に複数の整流孔を形成し、前記嫌気濾床槽内に流入した汚水を仕切り壁の整流孔にて整流しながら汚水流入側室から汚水流出側室に向って嫌気濾床槽内を水平方向に流動させ、この嫌気濾床槽内に配設した濾材に接触させながら汚水を嫌気性菌による分解を行うものである。
【０００８】
請求項２記載の発明の汚水浄化方法は、請求項１記載の汚水浄化方法において、濾材は上下方向に設けた紐状濾材としたものである。
【０００９】
請求項３記載の発明の汚水浄化装置は、濾材を配設した嫌気濾床槽内に少なくとも汚水流入側室と汚水流出側室とに仕切る仕切り壁を設け、この仕切り壁に複数の整流孔を形成し、前記嫌気濾床槽内に流入した汚水を仕切り壁に整流孔にて整流しながら汚水流入側室から汚水流出側室に向って嫌気濾床槽内を水平方向に流動させ、この嫌気濾床槽内に配設した濾材に接触させながら汚水を嫌気性菌による分解を行うものである。
【００１０】
請求項４記載の発明の汚水浄化装置は、請求項３記載の汚水浄化装置において、濾材は上下方向に設けた紐状濾材としたものである。
【００１１】
そして、嫌気濾床槽の汚水流入側室に流入した汚水は、仕切り壁によって短絡流となることなく仕切り壁に形成した整流孔によって整流されながら水平流となって汚水流出側室に向って嫌気濾床槽内を水平方向に向って流動する。この水平流となって流動する汚水は、汚水流入側室にて濾材にて汚水中の夾雑物、浮遊物が捕捉されるとともにこの濾材に捕捉された汚泥などは濾材の表面などに生育する嫌気性菌などによって分解され、仕切り壁に至った汚水はこの仕切り壁の整流孔から汚水流出側室に整流されて流動し、仕切り壁の汚水流入側室の濾材にて捕捉されなかった夾雑物、浮遊物が仕切り壁の汚水流出側室にて濾材にて捕捉されるとともにこの濾材に捕捉された汚泥などは濾材の表面などに生育する嫌気性菌などによって生物分解され、嫌気濾床槽の流出部に至った汚水は例えば接触曝気槽に流入され、嫌気濾床槽の水深に比して、処理効率を高めることができる。
【００１２】
また、濾材は上下方向に設けた紐状濾材とすることにより、紐状濾材は、嫌気濾床槽内に、規則正しく上下方向に汚水面から槽底面までまんべん配列することができ、汚水は仕切り壁の整流孔にて整流されながら汚水流入側室から汚水流出側室に向って紐状濾材と接触しながら嫌気濾床槽内を水平方向に流動され、紐状濾材と浮上物，沈殿汚泥との接触効率が高く、濾材に付着した微生物による生物分解が起こり易く、スカムの浮上物、沈殿汚泥の堆積量が少なく、紐状濾材の間隙からバキュームホースを投入して沈殿汚泥を嫌気濾床槽から吸い出すことができ、嫌気濾床槽に汚泥引出しのための清掃口を必要とせず、嫌気濾床槽内の汚水処理の無効部分が少なくなり、嫌気濾床槽の省容量化が図れ、嫌気濾床槽の構造も簡単になる。
【００１３】
【発明の実施の形態】
本発明の汚水浄化装置の一実施の形態を図面に基づいて説明する。
【００１４】
嫌気濾床槽１内は一端面上部に開口されている汚水流入部２を形成した汚水流入側と他端面上部に汚水流出部３を開口した汚水流出側との間を複数の、例えば２つの仕切り壁４，５にて汚水流入側室７、中間室８、汚水流出側室９に仕切られている。そして、この汚水流入側室７に対して前記中間室８及び汚水流出側室９は略２分の１程度の容積となっている。
【００１５】
この各仕切り壁４，５には下部を除いて複数の整流孔１０が形成されている。
【００１６】
そして、前記嫌気濾床槽１の汚水流入側室７内には前記汚水流入部２に対向して汚水流入整流板１１が設けられ、また、前記汚水流出側室９内には汚水流出部３に対向して汚水流出整流板１２が設けられている。
【００１７】
また、前記嫌気濾床槽１の汚水流入側室７、中間室８、汚水流出側室９にはそれぞれ平面視で千鳥状に規則正しく配置した各紐状の濾材１３が上下方向に汚水面から槽底面までまんべんなく張設されている。この各紐状の濾材１３は、例えば、紐状編物の周囲に多数の繊維の輪状部を形成しもので、この輪状部にて浮遊物が補足されるようになっている。
【００１８】
また、前記嫌気濾床槽１の汚水流出側室９の汚水流出側に隣接して接触曝気槽１５が設置されている。この接触曝気槽１５の一端面の上部には嫌気濾床槽１の汚水流出部３に対向して汚水流入部１６が開口されている。また、この接触曝気槽１５の他端面の上部には処理水流出部１７が開口されている。
【００１９】
また、この接触曝気槽１５内は汚水流入部１６と処理水流出部１７との間に設けた仕切り壁１８にて接触曝気室２０と沈殿室２１とが形成され、この接触曝気室２０と沈殿室２１の間の仕切り壁１８の下部は連通部２２が形成されている。
【００２０】
また、前記接触曝気室２０の下部には散気装置２３が配設され、この散気装置２３の上部には接触材２４が配設されている。また、前記沈殿室２１の底面は前記接触曝気室２０の底部から前記処理水流出部１７に向って上方に傾斜した傾斜面２５に形成されている。
【００２１】
さらに、前記接触曝気槽１５の沈殿室２１の処理水流出部１７に対向して処理水の流出堰２６が設けられ、また、この流出堰２６より接触曝気室２０側にはスカムバッフル２７が液面位置に設けられている。
【００２２】
次にこの実施の形態の作用を説明する。
【００２３】
嫌気濾床槽１の汚水流入部２から汚水流入側室７に流入した汚水は、仕切り壁４によって短絡流となることなく仕切り壁４に形成した整流孔１０によって整流されながら水平流となって中間室８に流動する。この水平流となって流動する汚水は、汚水流入側室７にて濾材１３に接触し、汚水中の夾雑物、浮遊物が濾材１３にて捕捉されるとともにこの濾材１３に捕捉された汚泥などは濾材１３の表面などに生育する嫌気性菌などによって分解される。
【００２４】
さらに、中間室８に流動した汚水は水平流となって汚水流出側室９に向って流動する。この水平流となって中間室８を流動する汚水は、濾材１３に接触して汚水中の夾雑物、浮遊物が濾材１３に捕捉されるとともにこの濾材１３に捕捉された汚泥などは濾材１３の表面などに生育する嫌気性菌などによって分解される。
【００２５】
そして、中間室８を流動する汚水は中間室８と汚水流入側室７との仕切り壁５に至った汚水はこの仕切り壁５の整流孔１０から汚水流出側室９に整流されて流入し、汚水流入側室７、中間室８の濾材１３にて捕捉されなかった夾雑物、浮遊物が汚水流出側室９にて濾材１３に捕捉されるとともにこの濾材１３に捕捉された汚泥などは濾材１３の表面などに生育する嫌気性菌などによって生物分解される。
【００２６】
汚水が仕切り壁４，５の整流孔１０にて整流されながら汚水流入側室７から中間室８を経て汚水流出側室９に向って紐状濾材１３と接触しながら嫌気濾床槽１内を水平方向に流動されるとき、この汚水流入側室７、中間室８及び汚水流出側室９に配列した濾材１３が嫌気濾床槽１内に、規則正しく上下方向に汚水面から槽底面までまんべん配列されていることにより、汚水中の浮上物，沈殿汚泥と紐状濾材１３との接触効率が高く、濾材１３に付着した微生物による生物分解が起こり易く、スカムの浮上物、沈殿汚泥の堆積量が少なくなる。
【００２７】
また、嫌気濾床槽１内に浮遊物、沈殿汚泥が溜まったときには、紐状濾材１３の間隙からバキュームホースを投入して沈殿汚泥を嫌気濾床槽１から吸い出すことができ、嫌気濾床槽１に汚泥引出しのための清掃口を必要とせず、嫌気濾床槽１内の汚水処理の無効部分が少なくなり、嫌気濾床槽１の省容量化が図れ、嫌気濾床槽１の構造も簡単になる。
【００２８】
そして、嫌気濾床槽１の汚水流出部３に至った汚水は例えば接触曝気槽１５に流入される。
【００２９】
この接触曝気槽１５に流入された汚水は、接触曝気室２０にて散気装置２３からの空気に接触しながら接触材２４の表面などに生育する好気性微生物などによって分解され、処理水は下方から沈殿室２１を流動して処理水流出部１７から流出される。
【００３０】
なお、前記嫌気濾床槽１の汚水流入側室７、中間室８、汚水流出側室９にはそれぞれ各紐状の濾材１３を設けたが、この各紐状の濾材１３に限られるものではなく、例えば、網状体にて中空円筒状に形成した濾材など各種濾材を用いることができる。
【００３１】
また、前記嫌気濾床槽１内は汚水流入側室７、中間室８、汚水流出側室９とに仕切った構成としたが、中間室８を形成することなく、汚水流入側室７、汚水流出側室９との２室とすることもでき、さらに、中間室８を複数に仕切ることもできる。
【００３２】
さらに、前記嫌気濾床槽１は一端面上部に開口されている汚水流入部２を開口した構成としたが、一端面の中間部または下部など適宜の位置に形成することもできる。
【００３３】
【発明の効果】
本発明によれば、嫌気濾床槽内に流入した汚水は仕切り壁の整流孔にて整流されながら水平流となるため、嫌気濾床槽の深さに比し、処理効率が高められる。
【００３４】
また、濾材を紐状濾材として、この紐状濾材を嫌気濾床槽内に、規則正しく上下方向に汚水面から槽底面までまんべん配列することができ、汚水は整流孔にて整流されながら汚水流入側室から汚水流出側室に向って紐状濾材と接触しながら嫌気濾床槽内を水平方向に流動され、紐状濾材と浮上物，沈殿汚泥との接触効率が高く、濾材に付着した微生物による生物分解が起こり易く、スカムの浮上物、沈殿汚泥の堆積量を少なくでき、紐状濾材の間隙からバキュームホースを投入して沈殿汚泥を嫌気濾床槽から吸い出すこともでき、嫌気濾床槽に汚泥引出しのための清掃口を必要とせず、嫌気濾床槽内の汚水処理の無効部分が少なくなり、嫌気濾床槽の省容量化が図れ、嫌気濾床槽の構造も簡単になる。
【図面の簡単な説明】
【図１】本発明の一実施の形態を示す汚水浄化装置の縦断正面説明図である。
【図２】同上平面説明図である。
【図３】同上図１のＩＩＩ−ＩＩＩ線部の縦断側面説明図である。
【符号の説明】
１ 嫌気濾床槽
４，５ 仕切り壁
７ 汚水流入側室
９ 汚水流出側室
１０ 整流孔
１３ 濾材[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method and an apparatus for purifying sewage in which sludge in sewage is decomposed by anaerobic bacteria in an anaerobic filter bed tank.
[0002]
[Prior art]
This type of conventional sewage purification apparatus partitions the anaerobic filter bed tank into a first chamber and a second chamber with a partition wall for a sewage inflow side and a sewage outflow side in order to prevent a short-circuit flow of sewage. Filter materials are respectively disposed in the first chamber and the second chamber of the anaerobic filter bed tank, and the sewage flowing from the sewage inflow section provided on the inflow side upper part of the first chamber flows as a downflow, Contaminants and suspended matter in the sewage are captured by the filter medium, and the sludge and the like captured by the filter medium are decomposed by anaerobic bacteria growing on the surface of the filter medium, and the sewage reaching the bottom of the first chamber. Flows through the flow path formed along the partition wall as an upward flow, flows into the upper part of the second chamber from the advection part formed at the upper part of the partition wall, and the sewage flowing into the second chamber. Flows as a downward flow, and the sewage reaching the bottom of the second chamber becomes an upward flow from the bottom of the second chamber. The contaminants and suspended matter in the sewage that flowed and became the ascending flow, which were not captured by the filter medium of the first chamber, are captured by the filter medium of the second chamber, and the sludge captured by the filter medium are The sewage that is decomposed by anaerobic bacteria and the like that grows on the surface of the filter medium and reaches the upper part of the second chamber flows into the contact aeration tank from the sewage outlet provided at the upper outlet side of the second chamber. The sewage flowing into the tank is decomposed by aerobic microorganisms that grow on the surface of the contact material provided in the contact aeration tank, and the sewage reaching the bottom of the contact aeration tank is formed in the contact aeration tank. The supernatant water of the sewage that flows into the settling chamber that has flowed into the settling chamber becomes treated water, is disinfected and discharged, and adopts a configuration (for example, see Patent Documents 1 and 2).
[0003]
[Patent Document 1]
JP-A-2000-189983 (pages 2 to 3, FIG. 1)
[0004]
[Patent Document 2]
JP-A-6-63574 (pages 2 to 3, FIG. 1)
[0005]
[Problems to be solved by the invention]
In the conventional sewage purification apparatus, the anaerobic filter tank is filled with filter media as appropriate, and the sewage flows down and up and down the anaerobic filter tank. Sludge accumulates in the lower part of the anaerobic filter bed, and the floating material floats on the upper part of the anaerobic filter bed tank. No filter media can be provided near the sewage surface where the floating material of the tank accumulates or near the bottom of the tank where the sedimentation sludge accumulates. The filter media can be installed only in the middle part of the anaerobic filter bed tank. It is necessary to provide a cleaning port in the inflow section, advection section, sewage outflow section, etc., resulting in an ineffective portion of sewage treatment in the anaerobic filter bed tank, and the treatment efficiency is lower than the depth in the anaerobic filter bed tank. there were.
[0006]
The present invention has been made in view of the above problems, and provides a method and an apparatus for purifying sewage in which the efficiency of sewage treatment in an anaerobic filter tank is good and the capacity of the anaerobic filter tank can be reduced.
[0007]
[Means for Solving the Problems]
In the sewage purification method according to the first aspect of the present invention, a partition wall for partitioning at least a sewage inflow side chamber and a sewage outflow side chamber is provided in an anaerobic filter bed tank provided with a filter medium, and a plurality of rectification holes are formed in the partition wall. The sewage flowing into the anaerobic filter tank is rectified by the rectifying holes in the partition wall while flowing in the anaerobic filter tank from the sewage inflow side chamber to the sewage outflow side chamber in the horizontal direction. The sewage is decomposed by an anaerobic bacterium while being brought into contact with the filter medium provided in the above.
[0008]
The sewage purification method according to the second aspect of the present invention is the sewage purification method according to the first aspect, wherein the filter medium is a string-shaped filter medium provided in a vertical direction.
[0009]
In the sewage purification apparatus according to the third aspect of the present invention, a partition wall for partitioning at least a sewage inflow side chamber and a sewage outflow side chamber is provided in an anaerobic filter bed tank provided with a filter medium, and a plurality of flow regulating holes are formed in the partition wall. While sewage flowing into the anaerobic filter bed tank is rectified by a rectifying hole in the partition wall, the anaerobic filter bed tank is caused to flow horizontally in the anaerobic filter bed tank from the sewage inflow side chamber toward the sewage outflow side chamber. The sewage is decomposed by an anaerobic bacterium while being brought into contact with the filter medium provided in the above.
[0010]
According to a fourth aspect of the present invention, there is provided the sewage purification apparatus according to the third aspect, wherein the filter medium is a string-shaped filter medium provided in a vertical direction.
[0011]
Then, the sewage flowing into the sewage inflow side chamber of the anaerobic filter bed tank is rectified by the rectification holes formed in the partition wall without being short-circuited by the partition wall, becomes a horizontal flow while being rectified by the rectification hole formed in the partition wall, and becomes anaerobic filter bed toward the sewage outflow side chamber. It flows horizontally in the tank. The sewage flowing as a horizontal stream is anaerobic in which impurities and suspended matter in the sewage are captured by the filter medium in the sewage inflow side chamber, and the sludge captured by the filter medium grows on the surface of the filter medium. The sewage that has been decomposed by bacteria and reaches the partition wall is rectified and flows from the rectifying hole of the partition wall to the sewage discharge side chamber, and contaminants and suspended matters that are not captured by the filter medium in the sewage inflow side chamber of the partition wall are removed. The sludge and the like trapped in the filter medium in the sewage outflow side chamber of the partition wall are biodegraded by anaerobic bacteria and the like growing on the surface of the filter medium and the like, and reach the outlet of the anaerobic filter bed tank. The sewage flows into, for example, a contact aeration tank, and the treatment efficiency can be increased as compared to the water depth of the anaerobic filter bed tank.
[0012]
In addition, by using the filter medium as a string-like filter medium provided in the vertical direction, the string-like filter medium can be evenly arranged vertically from the sewage surface to the bottom of the tank in the anaerobic filter bed tank. While being rectified by the rectification holes in the partition wall, the effluent flows horizontally in the anaerobic filter bed tank from the sewage inflow side chamber to the sewage outflow side chamber while coming into contact with the stringy filter medium. The contact efficiency is high, biodegradation by microorganisms attached to the filter medium is easy to occur, the amount of scum floating and sedimentation sludge is small, and a vacuum hose is inserted from the gap of the string-shaped filter medium to remove the sedimentation sludge from the anaerobic filter bed tank. The anaerobic filter bed tank does not require a cleaning port to draw out sludge, and the ineffective portion of sewage treatment in the anaerobic filter bed tank is reduced, reducing the capacity of the anaerobic filter bed tank. The structure of the floor tank is also simplified.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of a sewage purification apparatus of the present invention will be described with reference to the drawings.
[0014]
The inside of the anaerobic filter tank 1 has a plurality of, for example, two, sewage inflow sides between a sewage inflow side formed with a sewage inflow section 2 opened at one end upper side and a sewage outflow section 3 opened at the upper end side. The partition walls 4, 5 partition the sewage inflow chamber 7, the intermediate chamber 8, and the sewage outflow chamber 9. The intermediate chamber 8 and the sewage outflow chamber 9 have a volume of about one half of that of the sewage inflow chamber 7.
[0015]
A plurality of flow regulating holes 10 are formed in each of the partition walls 4 and 5 except for the lower part.
[0016]
A sewage inflow rectifying plate 11 is provided in the sewage inflow side chamber 7 of the anaerobic filter bed tank 1 so as to face the sewage inflow section 2, and in the sewage outflow side chamber 9, facing the sewage outflow section 3. Then, a sewage outflow straightening plate 12 is provided.
[0017]
Further, in the sewage inflow side chamber 7, the intermediate chamber 8, and the sewage outflow side chamber 9 of the anaerobic filter bed tank 1, each string-shaped filter medium 13 which is regularly arranged in a staggered shape in plan view is vertically arranged from the sewage surface to the bottom of the tank. It is stretched evenly. Each of the string-shaped filter media 13 is formed by, for example, forming a ring-shaped portion of a large number of fibers around the string-shaped knitted material, and the floating material is captured by the ring-shaped portion.
[0018]
A contact aeration tank 15 is provided adjacent to the sewage outflow side of the sewage outflow side chamber 9 of the anaerobic filter bed tank 1. A sewage inflow section 16 is opened above the one end face of the contact aeration tank 15 so as to face the sewage outflow section 3 of the anaerobic filter bed tank 1. In addition, a treated water outflow portion 17 is opened above the other end surface of the contact aeration tank 15.
[0019]
In the contact aeration tank 15, a contact aeration chamber 20 and a sedimentation chamber 21 are formed by a partition wall 18 provided between the sewage inflow section 16 and the treated water outflow section 17. A communication part 22 is formed in a lower part of the partition wall 18 between the chambers 21.
[0020]
A diffuser 23 is provided below the contact aeration chamber 20, and a contact member 24 is provided above the diffuser 23. The bottom surface of the sedimentation chamber 21 is formed as an inclined surface 25 which is inclined upward from the bottom of the contact aeration chamber 20 toward the treated water outlet 17.
[0021]
Further, a treated water outflow weir 26 is provided opposite to the treated water outflow portion 17 of the settling chamber 21 of the contact aeration tank 15, and a scum baffle 27 is provided on the contact aeration chamber 20 side of the outflow weir 26. It is provided at the surface position.
[0022]
Next, the operation of this embodiment will be described.
[0023]
The sewage flowing into the sewage inflow side chamber 7 from the sewage inflow portion 2 of the anaerobic filter bed tank 1 is not shunted by the partition wall 4 but is rectified by the rectifying holes 10 formed in the partition wall 4 to become a horizontal flow while being rectified. Flow into chamber 8. The sewage flowing as a horizontal flow comes into contact with the filter medium 13 in the sewage inflow side chamber 7, and impurities and suspended matters in the sewage are captured by the filter medium 13, and the sludge captured by the filter medium 13 is removed. It is decomposed by anaerobic bacteria growing on the surface of the filter medium 13 and the like.
[0024]
Further, the sewage flowing into the intermediate chamber 8 becomes a horizontal flow and flows toward the sewage outflow side chamber 9. The sewage flowing as a horizontal flow through the intermediate chamber 8 comes into contact with the filter medium 13, and contaminants and suspended matter in the sewage are captured by the filter medium 13, and the sludge captured by the filter medium 13 is removed by the filter medium 13. Decomposed by anaerobic bacteria growing on the surface.
[0025]
The sewage flowing through the intermediate chamber 8 reaches the partition wall 5 between the intermediate chamber 8 and the sewage inflow side chamber 7 and is rectified into the sewage outflow side chamber 9 from the rectification hole 10 of the partition wall 5 to flow into the sewage inflow. Impurities and suspended matter not captured by the filter medium 13 of the side chamber 7 and the intermediate chamber 8 are captured by the filter medium 13 in the sewage outflow side chamber 9, and the sludge captured by the filter medium 13 is on the surface of the filter medium 13. It is biodegraded by growing anaerobic bacteria.
[0026]
While the sewage is rectified by the rectification holes 10 of the partition walls 4 and 5, the sewage inflow side chamber 7 passes through the intermediate chamber 8 to the sewage outflow side chamber 9 and contacts the string-like filter medium 13 while horizontally moving inside the anaerobic filter bed tank 1. The filter media 13 arranged in the sewage inflow side chamber 7, the intermediate chamber 8, and the sewage outflow side chamber 9 are regularly arranged vertically in the anaerobic filter bed tank 1 from the sewage surface to the bottom surface. As a result, the contact efficiency between the floating material and settled sludge in the sewage and the string-shaped filter medium 13 is high, the biodegradation by microorganisms attached to the filter medium 13 is likely to occur, and the amount of scum floated and sedimented sludge is reduced. .
[0027]
In addition, when suspended matter and settled sludge are accumulated in the anaerobic filter bed tank 1, a vacuum hose can be introduced from the gap of the string-shaped filter medium 13 to suck out the settled sludge from the anaerobic filter bed tank 1. 1 does not require a cleaning port for withdrawing sludge, the ineffective portion of sewage treatment in the anaerobic filter tank 1 is reduced, the capacity of the anaerobic filter tank 1 can be reduced, and the structure of the anaerobic filter tank 1 can be reduced. It's easy.
[0028]
And the sewage which reached the sewage outflow part 3 of the anaerobic filter bed tank 1 flows into the contact aeration tank 15, for example.
[0029]
The sewage flowing into the contact aeration tank 15 is decomposed by aerobic microorganisms and the like that grow on the surface of the contact material 24 while contacting the air from the air diffuser 23 in the contact aeration chamber 20, and the treated water flows downward. From the treated water outflow portion 17 through the settling chamber 21.
[0030]
The sewage inflow side chamber 7, the intermediate chamber 8, and the sewage outflow side chamber 9 of the anaerobic filter bed tank 1 are provided with the respective filter materials 13 in the form of strings. However, the present invention is not limited to the filter materials 13 in the form of the respective strings. For example, various filter media such as a filter media formed in a hollow cylindrical shape by a net-like body can be used.
[0031]
Further, the inside of the anaerobic filter bed tank 1 is divided into a sewage inflow side chamber 7, an intermediate chamber 8, and a sewage outflow side chamber 9, but without forming the intermediate chamber 8, the sewage inflow side chamber 7, the sewage outflow side chamber 9 is formed. And the intermediate chamber 8 can be divided into a plurality of chambers.
[0032]
Further, the anaerobic filter bed tank 1 has a configuration in which the sewage inflow section 2 is opened at the upper end of one end surface, but may be formed at an appropriate position such as an intermediate portion or a lower portion of the one end surface.
[0033]
【The invention's effect】
According to the present invention, since the sewage flowing into the anaerobic filter bed tank is rectified by the rectifying holes in the partition wall and forms a horizontal flow, the treatment efficiency is enhanced as compared with the depth of the anaerobic filter bed tank.
[0034]
In addition, the filter medium is used as a string filter medium, and the string filter medium can be regularly arranged in the anaerobic filter bed tank vertically and vertically from the sewage surface to the bottom of the tank. From the inflow side chamber to the sewage outflow side chamber, it flows in the horizontal direction in the anaerobic filter bed tank while contacting the string-like filter medium, and the efficiency of contact between the string-like filter medium and floating matter and settled sludge is high, and the microorganisms adhering to the filter medium Biodegradation is easy to occur, the floating amount of scum and the amount of sedimentation sludge can be reduced, and a vacuum hose can be inserted through the gap between the filter media to suck out the sedimentation sludge from the anaerobic filter bed tank. No cleaning port is required for withdrawing sludge, the ineffective portion of sewage treatment in the anaerobic filter tank is reduced, the capacity of the anaerobic filter tank is reduced, and the structure of the anaerobic filter tank is simplified.
[Brief description of the drawings]
FIG. 1 is a vertical sectional front view of a sewage purification device showing an embodiment of the present invention.
FIG. 2 is an explanatory plan view of the same.
FIG. 3 is an explanatory longitudinal sectional side view taken along the line III-III of FIG. 1;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Anaerobic filter bed tanks 4, 5 Partition wall 7 Sewage inflow side chamber 9 Sewage outflow side chamber 10 Rectification hole 13 Filter media

Claims (4)

濾材を配設した嫌気濾床槽内に少なくとも汚水流入側室と汚水流出側室とに仕切る仕切り壁を設け、この仕切り壁に複数の整流孔を形成し、
前記嫌気濾床槽内に流入した汚水を仕切り壁の整流孔にて整流しながら汚水流入側室から汚水流出側室に向って嫌気濾床槽内を水平方向に流動させ、この嫌気濾床槽内に配設した前記濾材に接触させながら汚水を嫌気性菌による分解を行うことを特徴とする汚水浄化方法。In the anaerobic filter bed tank in which the filter medium is disposed, a partition wall is provided to partition at least a sewage inflow side chamber and a sewage outflow side chamber, and a plurality of flow regulating holes are formed in the partition wall,
The sewage flowing into the anaerobic filter tank is rectified in the rectifying hole of the partition wall while flowing horizontally in the anaerobic filter tank from the sewage inflow chamber to the sewage outflow chamber, and into the anaerobic filter tank. A sewage purification method, wherein sewage is decomposed by anaerobic bacteria while being brought into contact with the filter medium provided. 濾材は上下方向に設けた紐状濾材としたことを特徴とする請求項１記載の汚水浄化方法。The sewage purification method according to claim 1, wherein the filter medium is a string-shaped filter medium provided in a vertical direction. 濾材を配設した嫌気濾床槽内に少なくとも汚水流入側室と汚水流出側室とに仕切る仕切り壁を設け、この仕切り壁に複数の整流孔を形成し、
前記嫌気濾床槽内に流入した汚水を仕切り壁の整流孔にて整流しながら汚水流入側室から汚水流出側室に向って嫌気濾床槽内を水平方向に流動させ、この嫌気濾床槽内に配設した濾材に接触させながら汚水を嫌気性菌による分解を行うことを特徴とする汚水浄化装置。In the anaerobic filter bed tank in which the filter medium is disposed, a partition wall is provided to partition at least a sewage inflow side chamber and a sewage outflow side chamber, and a plurality of flow regulating holes are formed in the partition wall,
The sewage flowing into the anaerobic filter tank is rectified in the rectifying hole of the partition wall while flowing horizontally in the anaerobic filter tank from the sewage inflow chamber to the sewage outflow chamber, and into the anaerobic filter tank. A sewage purification apparatus characterized in that sewage is decomposed by anaerobic bacteria while being brought into contact with an arranged filter medium. 濾材は上下方向に設けた紐状濾材としたことを特徴とする請求項３記載の汚水浄化装置。The sewage purification apparatus according to claim 3, wherein the filter medium is a string-shaped filter medium provided in a vertical direction.
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102515351A (en) * 2011-12-15 2012-06-27 哈尔滨工业大学 Biological thickening device for reducing pollutants in coal chemical industry wastewater
CN103408130A (en) * 2013-07-29 2013-11-27 绍兴水处理发展有限公司 Aeration tank for reducing ammonia nitrogen content in sewage according to ammonia nitrogen biological degradation technology, and treating method
CN106145356A (en) * 2016-09-05 2016-11-23 济宁金水科技有限公司 Integral type sewage processing means and processing method
CN115583729A (en) * 2022-11-14 2023-01-10 广州全康环保设备有限公司 Distributed sewage treatment equipment
CN118851388A (en) * 2024-09-24 2024-10-29 成都之和环保科技有限公司 A high-density sedimentation tank and sedimentation process

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102515351A (en) * 2011-12-15 2012-06-27 哈尔滨工业大学 Biological thickening device for reducing pollutants in coal chemical industry wastewater
CN103408130A (en) * 2013-07-29 2013-11-27 绍兴水处理发展有限公司 Aeration tank for reducing ammonia nitrogen content in sewage according to ammonia nitrogen biological degradation technology, and treating method
CN103408130B (en) * 2013-07-29 2015-01-07 绍兴水处理发展有限公司 Aeration tank for reducing ammonia nitrogen content in sewage according to ammonia nitrogen biological degradation technology, and treating method
CN106145356A (en) * 2016-09-05 2016-11-23 济宁金水科技有限公司 Integral type sewage processing means and processing method
CN115583729A (en) * 2022-11-14 2023-01-10 广州全康环保设备有限公司 Distributed sewage treatment equipment
CN118851388A (en) * 2024-09-24 2024-10-29 成都之和环保科技有限公司 A high-density sedimentation tank and sedimentation process

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