JP4142467B2

JP4142467B2 - Sewage purification method and apparatus

Info

Publication number: JP4142467B2
Application number: JP2003045920A
Authority: JP
Inventors: 忠行泉; 高嶺北尾
Original assignee: Daiki Axis Co Ltd
Current assignee: Daiki Axis Co Ltd
Priority date: 2003-02-24
Filing date: 2003-02-24
Publication date: 2008-09-03
Anticipated expiration: 2023-02-24
Also published as: JP2004255237A

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、この嫌気濾床槽内に配設する濾材は上下方向に設けた紐状濾材とし、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、この嫌気濾床槽内に配設する濾材は上下方向に設けた紐状濾材とし、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ものである。
【０００９】
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で汚水中の夾雑物、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で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。
【００１０】
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なく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、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にて濾材にて捕捉され、紐状濾材と浮上物、沈殿汚泥との接触効率が高く、汚水流入側室と汚水流入側室にて濾材に付着した嫌気性菌などの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。
【００１１】
【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。
【００１２】
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。
【００１３】
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。
【００１４】
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。
【００１５】
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。
【００１６】
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。
【００１７】
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。
【００１８】
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。
【００１９】
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。
【００２０】
次にこの実施の形態の作用を説明する。
【００２１】
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。
【００２２】
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。
【００２３】
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。
【００２４】
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なく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。
【００２５】
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。
【００２６】
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。
【００２７】
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。
【００２８】
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。
【００２９】
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。
【００３０】
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。
【００３１】
【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。
【００３２】
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なく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]
BACKGROUND OF THE INVENTION
The present invention relates to a sewage purification method and apparatus for decomposing sludge in sewage with anaerobic bacteria in an anaerobic filter bed tank.
[0002]
[Prior art]
In order to prevent a short-circuit flow of sewage, 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 between the sewage inflow side and the sewage outflow side, The filter medium is disposed in each of the first chamber and the second chamber of the anaerobic filter bed tank, and the sewage flowing from the sewage inflow portion provided at the upper inflow side of the first chamber flows as a downward flow, Contaminants and suspended solids in the sewage are trapped by the filter medium, and sludge trapped in the filter medium is decomposed by anaerobic bacteria growing on the surface of the filter medium and reaches the bottom of the first chamber. Flows in the flow path formed along the partition wall as an upward flow, flows into the upper portion of the second chamber from the advection portion formed in the upper portion of the partition wall, and flows into the second chamber. Flows in a downward flow, and the sewage that reaches the bottom of the second chamber becomes an upward flow from the bottom of the second chamber. The contaminants that have not been captured by the filter medium in the first chamber in the sewage that has flowed and become the upward flow, sludge trapped by the filter medium and trapped by the filter medium in the second chamber, etc. The sewage which is decomposed by anaerobic bacteria growing 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 outflow part provided at the upper part of the outflow side of the second chamber. The sewage that flows into the tank is decomposed by aerobic microorganisms that grow on the surface of the contact material placed in the contact aeration tank, and the sewage that reaches the bottom of the contact aeration tank is formed in the contact aeration tank. The supernatant water of the sewage flowing into the sedimentation chamber and flowing into the sedimentation chamber is treated and disinfected and discharged (for example, see Patent Document 1 and Patent Document 2).
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 2000-189983 (page 2 to page 3, FIG. 1)
[0004]
[Patent Document 2]
JP-A-6-63574 (2nd page-3rd page, FIG. 1)
[0005]
[Problems to be solved by the invention]
In the conventional sewage purification apparatus, the filter medium is appropriately filled in the anaerobic filter bed tank, and the sewage is flowing down and upstream in the anaerobic filter bed tank, so the filter medium provided in the anaerobic filter bed tank Sludge accumulates in the lower part of the filter, and floating material floats in the upper part of the anaerobic filter bed tank, and no filtering material can be provided in the part that stores sedimented sludge, floating material, etc. Filter media cannot be provided in the vicinity of the sewage surface where the floated material in the tank accumulates and in the vicinity of the bottom of the tank in which precipitated sludge accumulates, and the filter medium can be disposed only in the middle part of the anaerobic filter bed tank. It is necessary to provide a cleaning port in the inflow part, the advection part, the sewage outflow part, etc., and there is an invalid part of sewage treatment in the anaerobic filter bed tank, and the treatment efficiency is worse than the depth in the anaerobic filter bed tank. there were.
[0006]
The present invention has been made in view of the above-described problems, and provides a sewage purification method and an apparatus therefor, which have good sewage treatment efficiency in an anaerobic filter bed tank and can save the capacity of the anaerobic filter bed tank.
[0007]
[Means for Solving the Problems]
In the sewage purification method according to the first aspect of the present invention, a partition wall that partitions at least a sewage inflow side chamber and a sewage outflow side chamber is provided in an anaerobic filter bed tank in which a filter medium is disposed, and a plurality of rectifying holes are formed in the partition wall. The filter medium disposed in the anaerobic filter bed tank is a string-like filter medium provided in the vertical direction, and the sewage outflow from the sewage inflow side chamber while rectifying the sewage flowing into the anaerobic filter bed tank at the rectifying hole of the partition wall. The inside of the anaerobic filter bed is made to flow in the horizontal direction toward the side chamber, and the sewage is decomposed by anaerobic bacteria while contacting the filter medium disposed in the anaerobic filter bed .
[0008]
In the sewage purification apparatus according to the second aspect of the present invention, a partition wall that partitions at least a sewage inflow side chamber and a sewage outflow side chamber is provided in the anaerobic filter bed tank in which the filter medium is disposed, and a plurality of rectifying holes are formed in the partition wall. The filter medium provided in the anaerobic filter bed tank is a string-like filter medium provided in the vertical direction, and the sewage outflow from the sewage inflow side chamber while rectifying the sewage flowing into the anaerobic filter bed tank through the rectifying hole in the partition wall The inside of the anaerobic filter bed is made to flow in the horizontal direction toward the side chamber, and the sewage is decomposed by anaerobic bacteria while contacting the filter medium arranged in the anaerobic filter bed .
[0009]
The sewage flowing into the sewage inflow side chamber of the anaerobic filter bed tank becomes a horizontal flow while being rectified by the rectification holes formed in the partition wall without being short-circuited by the partition wall, toward the sewage outflow side chamber. to dynamic flow the inside of the tank in the horizontal direction. The sewage that flows in this horizontal flow is anaerobic bacteria that grows on the surface of the filter medium, while contaminants and floating substances in the sewage are trapped by the filter medium in the sewage inflow side chamber. The sewage that is decomposed by the partition wall and flows to the partition wall flows into the sewage outflow side chamber through the rectification hole of this partition wall and flows, and the contaminants and floating matter that are not captured by the filter medium in the sewage inflow side chamber of the partition wall The sludge trapped by the filter medium in the sewage outflow side chamber of the wall and the sludge trapped in this filter medium is biodegraded by anaerobic bacteria growing on the surface of the filter medium, etc., and the sewage that has reached the outflow part of the anaerobic filter bed tank is For example, it can be flowed into the contact aeration tank, and the treatment efficiency can be increased as compared with the water depth of the anaerobic filter bed tank.
[0010]
Also, the filter medium by a string-like filter medium is provided in the vertical direction, the cord-like filter medium, the anaerobic filter bed tank can be Manben without sequence from sewage surface regularly vertically to the tank bottom, sewage Is flown horizontally in the anaerobic filter bed while contacting the string-like filter medium from the sewage inflow side chamber toward the sewage outflow side chamber while being rectified in the rectifying hole of the partition wall, and is not trapped by the filter medium in the sewage inflow side chamber Contaminants and suspended solids were captured by the filter medium on the sewage outflow side of the partition wall, and the contact efficiency between the string-shaped filter medium and the floating material and sedimented sludge was high, and adhered to the filter medium in the sewage inflow side chamber and the sewage inflow side chamber. Biodegradation by microorganisms such as anaerobic bacteria is likely to occur, the amount of floating scum and sedimentation sludge is small, and suction sludge can be sucked out of the anaerobic filter bed by inserting a vacuum hose through the gap between the string-like filter media Sludge in an anaerobic filter bed tank Without requiring cleaning port for out, ineffectiveness sewage treatment anaerobic filter bed tank is reduced, Hakare saving capacity of the anaerobic filter bed chamber, also simplified structure of the anaerobic filter bed chamber.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the sewage purification apparatus of the present invention will be described with reference to the drawings.
[0012]
In the anaerobic filter bed tank 1, a plurality of, for example, two, sewage outflow sides are formed between the sewage inflow side formed with the sewage inflow part 2 opened at the upper end of one end and the sewage outflow side opened with the sewage outflow part 3 at the upper end of the other end. The partition walls 4 and 5 partition the sewage inflow side chamber 7, the intermediate chamber 8, and the sewage outflow side chamber 9. The intermediate chamber 8 and the sewage outflow side chamber 9 have a volume of about one half of the sewage inflow side chamber 7.
[0013]
A plurality of rectifying holes 10 are formed in the partition walls 4 and 5 except for the lower part.
[0014]
Further, 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 part 2, and the sewage outflow side chamber 9 is opposed to the sewage outflow part 3. Thus, a sewage outflow rectifying plate 12 is provided.
[0015]
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-like filter medium 13 regularly arranged in a zigzag shape in a plan view is vertically arranged from the sewage surface to the tank bottom. It is stretched evenly. Each of the string-shaped filter media 13 is formed, for example, by forming a ring-shaped portion of a large number of fibers around the string-shaped knitted fabric, and suspended matter is supplemented by the ring-shaped portion.
[0016]
A contact aeration tank 15 is installed adjacent to the sewage outflow side of the sewage outflow side chamber 9 of the anaerobic filter bed tank 1. A sewage inflow part 16 is opened at the upper part of one end face of the contact aeration tank 15 so as to face the sewage outflow part 3 of the anaerobic filter bed tank 1. A treated water outflow portion 17 is opened at the upper part of the other end surface of the contact aeration tank 15.
[0017]
Further, in the contact aeration tank 15, a contact aeration chamber 20 and a precipitation chamber 21 are formed by a partition wall 18 provided between the sewage inflow portion 16 and the treated water outflow portion 17, and the contact aeration chamber 20 and the sedimentation chamber 21 are settled. A communication part 22 is formed at the lower part of the partition wall 18 between the chambers 21.
[0018]
In addition, a diffuser 23 is disposed in the lower part of the contact aeration chamber 20, and a contact material 24 is disposed in the upper part of the diffuser 23. The bottom surface of the sedimentation chamber 21 is formed as an inclined surface 25 that is inclined upward from the bottom of the contact aeration chamber 20 toward the treated water outflow portion 17.
[0019]
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 placed on the contact aeration chamber 20 side from the outflow weir 26. It is provided at the surface position.
[0020]
Next, the operation of this embodiment will be described.
[0021]
The sewage flowing into the sewage inflow side chamber 7 from the sewage inflow part 2 of the anaerobic filter bed tank 1 does not become a short circuit flow by the partition wall 4 but is rectified by the rectifying hole 10 formed in the partition wall 4 and becomes a horizontal flow and becomes intermediate. Flow into chamber 8. The sewage flowing in the horizontal flow contacts the filter medium 13 in the sewage inflow side chamber 7, and contaminants and suspended matters in the sewage are captured by the filter medium 13 and the sludge captured by the filter medium 13 is Degraded by anaerobic bacteria growing on the surface of the filter medium 13.
[0022]
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 in the intermediate chamber 8 as a horizontal flow contacts the filter medium 13 and the contaminants and suspended matter in the sewage are trapped by the filter medium 13 and the sludge trapped by the filter medium 13 is removed from the filter medium 13. Degraded by anaerobic bacteria growing on the surface.
[0023]
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 the sewage flows into the sewage outflow side chamber 9 through the rectifying hole 10 of the partition wall 5 and flows into the sewage flow. Contaminants and suspended matters not captured by the filter medium 13 in the side chamber 7 and the intermediate chamber 8 are captured by the filter medium 13 in the sewage outflow side chamber 9 and sludge trapped by the filter medium 13 is deposited on the surface of the filter medium 13. Biodegraded by growing anaerobic bacteria.
[0024]
While the sewage is rectified in the rectification holes 10 of the partition walls 4 and 5, the inside of the anaerobic filter bed tank 1 is horizontally contacted with the string-like filter medium 13 from the sewage inflow side chamber 7 through the intermediate chamber 8 toward the sewage outflow side chamber 9. when it is flowing, the sewage inflow side chamber 7, the intermediate chamber 8 and sewage outflow side chamber filter medium 13 arranged in 9 anaerobic filter bed tank 1, is Manben arranged without a regular sewage plane vertically to the tank bottom surface As a result, the contact efficiency between the levitated matter in the sewage, the precipitated sludge and the string-like filter medium 13 is high, the biodegradation by microorganisms attached to the filter medium 13 is likely to occur, and the amount of scum levitated matter and precipitated sludge is small. Become.
[0025]
In addition, when suspended matter or precipitated sludge accumulates in the anaerobic filter bed tank 1, a vacuum hose can be introduced through the gap between the string-like filter media 13 to suck out the precipitated sludge from the anaerobic filter bed tank 1. 1 does not require a cleaning port for extracting sludge, and there are fewer ineffective portions of the sewage treatment in the anaerobic filter bed tank 1 to reduce the capacity of the anaerobic filter bed tank 1 and the structure of the anaerobic filter bed tank 1 It will be easy.
[0026]
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.
[0027]
The sewage that has flowed into the contact aeration tank 15 is decomposed by aerobic microorganisms that grow on the surface of the contact material 24 while contacting the air from the diffuser 23 in the contact aeration chamber 20, and the treated water flows downward. From the treated water outflow part 17 through the settling chamber 21.
[0028]
Each string-like filter medium 13 is provided in each of the sewage inflow side chamber 7, the intermediate chamber 8, and the sewage outflow side chamber 9 of the anaerobic filter bed tank 1, but is not limited to each string-like filter medium 13, For example, various filter media such as a filter media formed in a hollow cylindrical shape with a net-like body can be used.
[0029]
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 and the sewage outflow side chamber 9 are formed. The intermediate chamber 8 can be divided into a plurality of chambers.
[0030]
Furthermore, although the said anaerobic filter bed tank 1 was set as the structure which opened the sewage inflow part 2 opened by the one end surface upper part, it can also be formed in appropriate positions, such as the intermediate part or lower part of one end surface.
[0031]
【The invention's effect】
According to the present invention, the sewage flowing into the anaerobic filter bed tank becomes a horizontal flow while being rectified by the rectifying hole of the partition wall, so that the processing efficiency is improved as compared with the depth of the anaerobic filter bed tank.
[0032]
Furthermore, the filter medium as a string-like filter material, the string-like filtering medium in the anaerobic filter bed tank, regularly vertically can be arranged without Manben from sewage surface to the tank bottom, while sewage is rectified by the rectifier hole Microorganisms that flow horizontally in the anaerobic filter bed tank from the sewage inflow side chamber toward the sewage outflow side chamber while in contact with the string-like filter medium, and have high contact efficiency between the string-like filter medium, levitated matter, and precipitated sludge, and adhere to the filter medium Biodegradation is likely to occur, the amount of scum levitated matter and sedimentation sludge can be reduced, a vacuum hose can be inserted through the gap between the string-like filter media, and the sedimentation sludge can be sucked out from the anaerobic filter bed tank. In addition, there is no need for a cleaning port for extracting sludge, the ineffective portion of the sewage treatment in the anaerobic filter bed tank is reduced, the capacity of the anaerobic filter bed tank can be reduced, and the structure of the anaerobic filter bed tank is simplified.
[Brief description of the drawings]
FIG. 1 is a longitudinal front view of a sewage purification apparatus showing an embodiment of the present invention.
FIG. 2 is an explanatory plan view of the same as above.
FIG. 3 is a longitudinal sectional side view taken along line III-III in FIG. 1;
[Explanation of symbols]
1 Anaerobic filter bed tank 4, 5 Partition wall 7 Sewage inflow side chamber 9 Sewage outflow side chamber
10 Rectification hole
13 Filter media

Claims

In the anaerobic filter bed tank in which the filter medium is disposed, a partition wall that partitions at least the sewage inflow side chamber and the sewage outflow side chamber is provided, and a plurality of rectifying holes are formed in the partition wall,
The filter medium disposed in the anaerobic filter bed tank is a string-shaped filter medium provided in the vertical direction,
While the sewage flowing into the anaerobic filter bed is rectified at the rectifying hole of the partition wall, the sewage flow from the sewage inflow side chamber toward the sewage outflow side chamber is caused to flow horizontally in the anaerobic filter bed tub. A method for purifying sewage, comprising decomposing sewage with anaerobic bacteria while contacting the filter medium provided .

In the anaerobic filter bed tank in which the filter medium is disposed, a partition wall that partitions at least the sewage inflow side chamber and the sewage outflow side chamber is provided, and a plurality of rectifying holes are formed in the partition wall,
The filter medium disposed in the anaerobic filter bed tank is a string-shaped filter medium provided in the vertical direction,
While the sewage flowing into the anaerobic filter bed is rectified at the rectifying hole of the partition wall, the sewage flow from the sewage inflow side chamber toward the sewage outflow side chamber is caused to flow horizontally in the anaerobic filter bed tub. A sewage purification apparatus, wherein sewage is decomposed by anaerobic bacteria while being brought into contact with a disposed filter medium .