JPH09192688A - Method for intermittently aerating sewage - Google Patents
Method for intermittently aerating sewageInfo
- Publication number
- JPH09192688A JPH09192688A JP564096A JP564096A JPH09192688A JP H09192688 A JPH09192688 A JP H09192688A JP 564096 A JP564096 A JP 564096A JP 564096 A JP564096 A JP 564096A JP H09192688 A JPH09192688 A JP H09192688A
- Authority
- JP
- Japan
- Prior art keywords
- aeration
- activated sludge
- sewage
- chamber
- time
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
Landscapes
- Activated Sludge Processes (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、家庭の便所・洗面
所・風呂・厨房等から排出される汚水の間欠曝気処理方
法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for intermittent aeration treatment of sewage discharged from a toilet, washroom, bath, kitchen, etc. at home.
【０００２】[0002]
【従来の技術】家庭の便所・洗面所・風呂・厨房等から
排出される汚水・排水を処理する家庭用浄化槽には、し
尿単独処理浄化槽と、し尿及び雑排水の混合汚水を処理
する合併排水処理浄化槽の２タイプがある。これらの浄
化槽は、従来、維持管理が容易で、槽内汚泥濃度を高く
保つことができ、浄化槽の大きさを比較的小型にできる
固定床式がよく用いられている。この固定床式浄化槽の
多くは、嫌気濾床室、好気活性汚泥室、沈殿室及び消毒
室から成り、通常、沈殿室上澄水の一部は嫌気濾床室へ
返送され処理されるので、循環式ともいわれる。上記固
定床式の浄化槽では、嫌気濾床室に導入された汚水の有
機物がそこで嫌気分解（メタン発酵等）を受ける。ま
た、沈殿室から返送されてくる液中の硝酸イオンはそこ
で脱窒素される。次の好気活性汚泥室においては、有機
物が酸化分解され、アンモニアは硝酸化される。そし
て、沈殿室で汚泥と上澄水が分離され、上澄水は嫌気濾
床室へ返送される一部を除いて消毒室に送られ塩素等で
滅菌処理されて放流される。2. Description of the Related Art Household septic tanks that treat sewage and wastewater discharged from household toilets, washrooms, baths, kitchens, etc., include a single sewage treatment septic tank and combined wastewater that treats mixed sewage of human waste and miscellaneous wastewater. There are two types of treatment septic tanks. Conventionally, these septic tanks are often of fixed bed type, which can be easily maintained and maintained, the sludge concentration in the tank can be kept high, and the size of the septic tank can be made relatively small. Most of this fixed bed septic tank consists of an anaerobic filter bed room, an aerobic activated sludge room, a sedimentation room and a disinfection room. Usually, a part of the supernatant water of the precipitation room is returned to the anaerobic filter bed room for treatment. It is also called a circulation type. In the fixed bed type septic tank, the organic matter of the wastewater introduced into the anaerobic filter bed chamber undergoes anaerobic decomposition (methane fermentation or the like) there. The nitrate ions in the liquid returned from the precipitation chamber are denitrified there. In the next aerobic activated sludge chamber, organic matter is oxidatively decomposed and ammonia is nitrated. Then, sludge and supernatant water are separated in the settling chamber, and the supernatant water is sent to the disinfection chamber except a part returned to the anaerobic filter bed chamber, sterilized with chlorine or the like, and discharged.
【０００３】近年、沈殿室を設けず、代わりに好気活性
汚泥室内に膜分離器（膜モジュール）を浸漬・設置し、
膜濾過液の一部を好気活性汚泥室へ返送する膜分離型浄
化槽が、汚水が短時間に流入しても無処理汚水流出の危
険が少なく、槽の小型化も期待できることから、検討さ
れている（造水技術：第20巻、No.2、第65-68頁、1994
年、特開昭６１−１２０６９４号公報）。また、前記膜
分離型浄化槽の簡略化・小型化や省エネルギーを目的と
して、嫌気濾床室及び好気活性汚泥室の２室の代わり
に、膜濾過器を浸漬・設置した活性汚泥室１室のみにお
いて、活性汚泥液を膜濾過しながら一定時間曝気をする
好気的分解処理（硝化処理）と一定時間曝気をしない嫌
気的分解処理（脱窒処理）の両処理を繰返し、汚水を浄
化する間欠曝気処理法も検討されている（辻隆正他：第
２９回日本環境学会年会講演集、第１１７−１１８頁、
平成７年）。In recent years, a sedimentation chamber has not been provided, but instead, a membrane separator (membrane module) has been immersed and installed in the aerobic activated sludge chamber.
A membrane separation type septic tank that returns a part of the membrane filtrate to the aerobic activated sludge chamber is considered because there is little risk of untreated sewage outflow even if sewage flows in for a short time, and it can be expected to make the tank smaller. (Water production technology: Volume 20, No. 2, pages 65-68, 1994
, JP-A-61-120694). In addition, for the purpose of simplifying and downsizing the membrane separation type septic tank and saving energy, only one activated sludge chamber in which a membrane filter is immersed / installed is used instead of two chambers of an anaerobic filter chamber and an aerobic activated sludge chamber. In this process, both the aerobic decomposition process (nitrification process) in which the activated sludge liquid is aerated for a certain period of time while performing membrane filtration and the anaerobic decomposition process (denitrification process) in which no aeration is performed for a certain period of time are repeated to intermittently purify the wastewater Aeration treatment methods are also being considered (Takamasa Tsuji et al .: 29th Annual Meeting of the Environmental Society of Japan, pp. 117-118,
1995).
【０００４】[0004]
【発明が解決しようとする課題】上記間欠曝気処理法に
おいて、一定時間曝気をしない嫌気的分解処理（脱窒処
理）中に、槽内の液を撹拌することは必要であり、従来
は撹拌羽根やポンプによっている。本発明は、活性汚泥
液を膜濾過しつつ汚水を浄化する間欠曝気処理の改良法
であって、一定時間曝気をしない嫌気的分解処理（脱窒
処理）中の撹拌を撹拌羽根やポンプによらないでパルス
曝気によって行うもので、撹拌動力を節約する方法を提
供する。In the above intermittent aeration treatment method, it is necessary to stir the liquid in the tank during the anaerobic decomposition treatment (denitrification treatment) in which aeration is not performed for a certain period of time. Conventionally, stirring blades have been used. Or pump. The present invention is an improved method of intermittent aeration treatment for purifying sewage while performing membrane filtration of activated sludge liquid, and stirring by stirring blades or pumps during anaerobic decomposition treatment (denitrification treatment) that does not perform aeration for a certain period of time. This is done by pulsed aeration without agitation and provides a way to save agitation power.
【０００５】[0005]
【課題を解決するための手段】本発明は、下記の汚水の
間欠曝気処理方法である。 （１）活性汚泥の滞留する液中に浸漬して設けられた膜
濾過器とその膜濾過器の下方に散気管が設けられた活性
汚泥室へ、汚水を供給し、活性汚泥液を膜濾過器で濾過
しながら、散気管から一定時間曝気をする好気的分解処
理と一定時間曝気をしない嫌気的分解処理の両処理を繰
り返す汚水の間欠曝気処理方法であって、前記嫌気的分
解処理は予め定められた時間の曝気停止とそれに続くパ
ルス曝気の繰返しからなることを特徴とする、汚水の処
理方法。 （２）予め定められた時間の曝気停止が５〜２０分間の
曝気停止であり、パルス曝気が２分を超えない間、曝気
量０．０５〜５．０ｍ3／ｍ3／ｍｉｎで曝気するもので
ある、上記（１）の処理方法。The present invention provides the following intermittent aeration treatment method for wastewater. (1) Membrane filtration of the activated sludge liquid is performed by supplying sewage to a membrane filter provided by immersing it in the liquid in which the activated sludge stays and an activated sludge chamber provided with an air diffusing pipe below the membrane filter. A method for intermittent aeration treatment of sewage, which repeats both aerobic decomposition treatment in which aeration pipes are aerated for a certain period of time and anaerobic decomposition treatment in which aeration is not conducted for a certain period of time, while the anaerobic decomposition treatment is carried out. A method for treating sewage, which comprises repeating aeration for a predetermined time and then repeating pulse aeration. (2) a predetermined aeration stoppage time has aeration stoppage of 5-20 minutes, while the pulse aeration does not exceed 2 minutes, aerated with aeration amount 0.05~5.0m 3 / m 3 / min The processing method according to (1) above.
【０００６】本発明を図により説明すれば、図１の「曝
気のタイムスケジュール」（横軸は時間、縦軸は曝気量
（任意単位））に示されるようになる。図１中、Ｔｎは
硝化処理の時間、Ｔｄは脱窒処理の時間であり、Ｔｄ中
に一定の頻度でパルス曝気する。The present invention will be described with reference to the drawing, which is shown in "Time schedule of aeration" (horizontal axis is time, vertical axis is aeration amount (arbitrary unit)) in FIG. In FIG. 1, Tn is a nitrification treatment time, Td is a denitrification treatment time, and pulse aeration is performed at a constant frequency during Td.
【０００７】本発明において、パルス曝気の強さ、時間
及び頻度（又は、曝気停止の時間）は、活性汚泥液の静
止時の膜濾過ケーキの成長速度と酸素移動速度、並びに
活性汚泥液の濃度と濾過速度の値から総合的に判断して
設定することができる。濃度１万ｐｐｍ程度の活性汚泥
液は、５〜２０分間では顕著な汚泥沈降はみられない。
また、活性汚泥室内への汚水の流入は活性汚泥液を適度
に撹拌する。そのため、パルス曝気は活性汚泥液にゆる
やかな回転流が起こる程度でよい。槽の大きさ等によっ
ても変動するが、槽の大きさが１−３ｍ3であればパル
ス曝気の曝気量は０．０５〜５．０ｍ3／ｍ3／ｍｉｎ、
好ましくは０．２〜２．０ｍ3／ｍ3／ｍｉｎであり、パ
ルス曝気の時間は２分以内、好ましくは３０〜６０秒で
ある。パルス曝気の曝気量が５．０ｍ3／ｍ3／ｍｉｎよ
りも大きかったり、パルス曝気の時間が２分を超える
と、Ｔｄにおける嫌気条件の維持が困難となり脱窒が不
完全となりやすい。また、パルス曝気の曝気量が０．０
５ｍ3／ｍ3／ｍｉｎ未満の場合は、汚泥の撹拌不足にな
りやすい。なお、曝気量の単位のｍ3／ｍ3／ｍｉｎは、
曝気量容量／槽内の液容量／分の意味で、例えば、２．
０ｍ3の曝気槽に１．０ｍ3の活性汚泥液が存在する状態
で毎分１．０ｍ3の空気を曝気すると、曝気量は１．０
ｍ3／ｍ3／ｍｉｎである。また、Ｔｄにおけるパルス曝
気の周期、すなわち、一つのパルスと次のパルスの間の
長さ（時間）は、通常、５〜２０分、好ましくは１０〜
１５分である。５分未満では、Ｔｄにおける嫌気条件の
維持が困難となり脱窒が不完全となりやすく、２０分を
超えると反応を進めるための汚泥撹拌が不足になりやす
い。In the present invention, the intensity, time and frequency (or the time of stopping aeration) of pulse aeration are defined as the growth rate and oxygen transfer rate of the membrane filtration cake when the activated sludge is stationary, and the concentration of the activated sludge. And the value of the filtration rate can be comprehensively determined and set. In the activated sludge liquid having a concentration of about 10,000 ppm, no significant sludge settling is observed in 5 to 20 minutes.
Further, the inflow of sewage into the activated sludge chamber appropriately stirs the activated sludge liquid. Therefore, the pulse aeration may be such that a gentle rotating flow occurs in the activated sludge liquid. Also varies the size of the vessel, but aeration of the pulse aeration if the size of the tank is a 1-3M 3 is 0.05~5.0m 3 / m 3 / min,
It is preferably 0.2 to 2.0 m 3 / m 3 / min, and the pulse aeration time is within 2 minutes, preferably 30 to 60 seconds. When the amount of pulse aeration is larger than 5.0 m 3 / m 3 / min or the time of pulse aeration exceeds 2 minutes, it is difficult to maintain the anaerobic condition at Td, and denitrification is likely to be incomplete. Also, the aeration amount of pulse aeration is 0.0
If it is less than 5 m 3 / m 3 / min, sludge is likely to be insufficiently stirred. The unit of aeration rate, m 3 / m 3 / min, is
Aeration volume capacity / liquid volume in tank / minute, for example, 2.
When 1.0 m 3 of air is aerated in the state where 1.0 m 3 of activated sludge liquid is present in the 0 m 3 aeration tank, the aeration amount is 1.0
It is m 3 / m 3 / min. The cycle of pulse aeration in Td, that is, the length (time) between one pulse and the next pulse is usually 5 to 20 minutes, preferably 10 to
15 minutes. If it is less than 5 minutes, it is difficult to maintain the anaerobic condition in Td, and denitrification tends to be incomplete, and if it exceeds 20 minutes, sludge agitation for proceeding the reaction tends to be insufficient.
【０００８】散気管から一定時間曝気をする好気的分解
処理と、それに続く一定時間曝気をしない嫌気的分解処
理の両処理の１サイクルの時間（すなわち、Ｔｎ＋Ｔ
ｄ）は、浄化槽の運転条件に応じて適宜、最適時間を決
定すればよいが、通常は１〜４時間である。またＴｎと
Ｔｄの時間比率も、浄化槽の運転条件に応じて適宜、最
適比率を決定すればよいが、通常は、１：３から１：１
の範囲であり、脱窒効果を上げるためにはＴｎよりもＴ
ｄの方を長めに設定する。[0008] The time of one cycle of both the aerobic decomposition treatment in which aeration pipes are aerated for a certain period of time and the subsequent anaerobic decomposition process in which no aeration is performed for a certain period of time (that is, Tn + T).
For d), the optimum time may be appropriately determined according to the operating conditions of the septic tank, but it is usually 1 to 4 hours. As for the time ratio of Tn and Td, the optimum ratio may be appropriately determined according to the operating conditions of the septic tank, but normally, it is 1: 3 to 1: 1.
It is the range of T
Set d to be longer.
【０００９】以上の設定条件の変動幅を考慮すると、
「Ｔｎ＋Ｔｄ」１サイクルのＴｄにおける「予め定めら
れた時間の曝気停止とそれに続くパルス曝気」の繰返し
の回数は、通常、２〜１８回である。Considering the fluctuation range of the above setting conditions,
“Tn + Td” The number of times of “aeration stop for a predetermined time and subsequent pulse aeration” in Td of one cycle is usually 2 to 18 times.
【００１０】活性汚泥室を曝気する好気的分解処理の間
（Ｔｎ）は、活性汚泥室内の散気管からの曝気は連続的
に行い、膜濾過器に通じている吸引ポンプも連続的に稼
働させ、濾過する。この曝気処理により汚水中の有機物
は好気的に酸化され、窒素化合物は硝酸イオンにまで酸
化される。During the aerobic decomposition process for aerating the activated sludge chamber (Tn), the aeration pipes in the activated sludge chamber are continuously aerated, and the suction pump connected to the membrane filter is also continuously operated. And filter. By this aeration treatment, organic matter in wastewater is aerobically oxidized, and nitrogen compounds are also oxidized to nitrate ions.
【００１１】活性汚泥室を曝気しない嫌気的分解処理の
間（Ｔｄ）は、活性汚泥液は嫌気状態もしくは準嫌気状
態に保たれる。この間のパルス曝気は反応液の撹拌を目
的とするために行うのである。During the anaerobic decomposition treatment in which the activated sludge chamber is not aerated (Td), the activated sludge liquid is kept in an anaerobic state or a semi-anaerobic state. The pulse aeration during this period is performed for the purpose of stirring the reaction solution.
【００１２】本発明において、活性汚泥液中に浸漬して
用いる膜濾過器は、精密濾過が可能な膜濾過型固液分離
器のことであり、精密濾過能のある有機高分子膜とそれ
を支持する支持体、集水部等からなる膜濾過器、精密濾
過能のある金属フィルタ又はセラミックフィルタを組み
込んだ膜濾過器等も使用できる。膜濾過器の形状は、平
板状、管状等の種々のものを用いることができるが、平
板状（平膜モジュール）が好ましく用いられる。濾過膜
面の内側と外側は濾過推進力を生じさせるために吸引ポ
ンプで濾過膜内側を吸引したり、水頭差を生じさせるた
めに濾過液取り出し口を活性汚泥室の液面より下方に設
置したりする。また、膜濾過器は膜濾過面が鉛直となる
方向に置く。膜濾過器の下方に設置した散気管からの曝
気による液上昇流により、膜濾過器の膜面に堆積した固
形物を強制的に排除するためである。平板状膜（平膜モ
ジュール）を用いる場合は、通常、複数枚を設置する。In the present invention, the membrane filter used by being immersed in the activated sludge liquid is a membrane filtration type solid-liquid separator capable of performing microfiltration, and an organic polymer membrane having microfiltration capability and the same. It is also possible to use a membrane filter having a supporting body for supporting, a water collecting part, etc., a membrane filter incorporating a metal filter or a ceramic filter having a microfiltration capability, and the like. Various shapes such as a flat plate shape and a tubular shape can be used as the shape of the membrane filter, but a flat shape (flat membrane module) is preferably used. The inner and outer sides of the filtration membrane surface are suctioned by a suction pump to generate the filtration driving force, and the filtration liquid outlet is installed below the liquid surface of the activated sludge chamber to generate a head difference. Or Also, the membrane filter is placed in a direction in which the membrane filtration surface is vertical. This is because the solid matter deposited on the membrane surface of the membrane filter is forcibly removed by the liquid ascending flow due to aeration from the air diffusing tube installed below the membrane filter. When using a flat membrane (flat membrane module), usually a plurality of sheets are installed.
【００１３】なお、上記における金属フィルタは、ステ
ンレス鋼等の金網を圧延して細かな網目基板とし、これ
にステンレス粉末、酸化ニッケル、酸化銅等の微粉末を
含む懸濁液又はペーストを塗布し焼結する方法、ステン
レス粉末等の第１の金属粉末を焼結させて空孔径の比較
的大きな第１のフィルタ層を形成させ、これにステンレ
ス粉末、酸化ニッケル、酸化銅等の微粉末を含む懸濁液
又はペーストを塗布し焼結する方法等により、製造する
ことができる。In the above metal filter, a wire mesh made of stainless steel or the like is rolled into a fine mesh substrate, and a suspension or paste containing fine powder of stainless powder, nickel oxide, copper oxide or the like is applied thereto. Sintering method, a first metal powder such as stainless powder is sintered to form a first filter layer having a relatively large pore size, and a fine powder such as stainless powder, nickel oxide, and copper oxide is included in the first filter layer. It can be manufactured by a method of applying a suspension or paste and sintering.
【００１４】活性汚泥室には、膜濾過器の下方でかつ活
性汚泥室の底部近くに、ブロア等からの空気を活性汚泥
室に吹き込む散気管が設けられる。この散気管からの曝
気は、酸素供給と汚泥液の撹拌目的のほかに、膜濾過器
の濾過膜面に堆積する固形物を強制的に排除する役目も
ある。膜濾過器を通過した膜濾過液（清澄液）は、最後
に塩素等で滅菌処理され放流される。The activated sludge chamber is provided with an air diffuser below the membrane filter and near the bottom of the activated sludge chamber to blow air from a blower or the like into the activated sludge chamber. The aeration from the air diffuser has a function of not only supplying oxygen and agitating the sludge liquid, but also forcibly removing solid matter deposited on the filtration membrane surface of the membrane filter. The membrane filtrate (clarified liquid) that has passed through the membrane filter is finally sterilized with chlorine or the like and discharged.
【００１５】[0015]
【発明の実施の形態】本発明の汚水の間欠曝気処理方法
を図に基づき説明する。図１は曝気のタイムスケジュー
ル、図２は本発明の間欠曝気処理方法を実施できる一例
の浄化槽の正面模式図、図３はその平面模式図である。
浄化槽１の本体は、通常、ＦＲＰやＳＭＣ等で造られ
る。浄化槽１は汚水の流れに沿って大きく、流量調整室
２、活性汚泥室３、及び汚泥貯留４に分割されている。
また、点検整備時の便宜のため浄化槽にはマンホール蓋
５が設けられている。BEST MODE FOR CARRYING OUT THE INVENTION An intermittent aeration treatment method for sewage according to the present invention will be described with reference to the drawings. FIG. 1 is a time schedule of aeration, FIG. 2 is a schematic front view of an example of a septic tank capable of carrying out the intermittent aeration treatment method of the present invention, and FIG. 3 is a schematic plan view thereof.
The main body of the septic tank 1 is usually made of FRP, SMC or the like. The septic tank 1 is large along the flow of sewage, and is divided into a flow rate adjusting chamber 2, an activated sludge chamber 3, and a sludge storage 4.
Further, a manhole cover 5 is provided in the septic tank for convenience of inspection and maintenance.
【００１６】汚水は、汚水流入管６から流量調整室２に
流入する。汚水にはトイレットペーパー等の固形物が含
まれるので、そのままではエアリフトポンプ１０で搬送
できない。そこで流量調整室２に一旦貯留し、ブロア１
４により供給される空気を散気管７から曝気しながら撹
拌し、固形物を小さく砕く。流量調整室２の水位は、エ
アリフトポンプ１０が汚水を汲み上げることのできない
最低水位と、汚水の最大流入量から予測される最高水位
の間にある。流量調整室２の最低水位の下に、網状プラ
スチック濾床８と、散気管７が設置され、汚水中の固形
物を常時砕き分散させると共に、毛髪類・プラスチック
類等の破砕困難な固形物は網状プラスチック濾床８で捕
捉される。これにより、エアリフトポンプ１０の詰まり
を防止し、次の活性汚泥室３に設置された膜濾過器１１
の膜面閉塞又は膜破損を防止する。The sewage flows into the flow rate adjusting chamber 2 through the sewage inflow pipe 6. Since sewage contains solid matter such as toilet paper, it cannot be transported by the air lift pump 10 as it is. Therefore, it is temporarily stored in the flow control chamber 2 and blower 1 is stored.
The air supplied by 4 is agitated while aerating from the air diffusing pipe 7, and the solid matter is crushed into small pieces. The water level in the flow rate adjusting chamber 2 is between the lowest water level at which the air lift pump 10 cannot pump up the waste water and the highest water level predicted from the maximum inflow amount of the waste water. A reticulated plastic filter bed 8 and an air diffusing pipe 7 are installed below the lowest water level in the flow rate adjusting chamber 2 to constantly crush and disperse solid matter in wastewater, and to prevent solid matter such as hair and plastics from being easily crushed. It is captured by the reticulated plastic filter bed 8. This prevents clogging of the air lift pump 10 and the membrane filter 11 installed in the next activated sludge chamber 3.
To prevent the membrane surface from being clogged or damaged.
【００１７】エアリフトポンプ１０で汲み上げられた汚
水は、活性汚泥室３に流入する。活性汚泥室３には、膜
濾過器１１が活性汚泥液内に浸漬・配置され、膜濾過器
１１の下方には、散気管１２が設置されている。膜濾過
器１１の膜面の内側は吸引ポンプ１６に通じていて、そ
の吸引ポンプにより生じる差圧によって活性汚泥液が濾
過される。膜を通過した活性汚泥中の液（濾過液）は滅
菌器１７に接触後、処理済み水として放流管１８から排
出される。Sewage pumped up by the air lift pump 10 flows into the activated sludge chamber 3. In the activated sludge chamber 3, a membrane filter 11 is immersed and arranged in the activated sludge liquid, and an air diffuser 12 is installed below the membrane filter 11. The inside of the membrane surface of the membrane filter 11 communicates with a suction pump 16, and the activated sludge liquid is filtered by the differential pressure generated by the suction pump. The liquid (filtrate) in the activated sludge that has passed through the membrane contacts the sterilizer 17 and is then discharged from the discharge pipe 18 as treated water.
【００１８】散気管１２からの曝気は、図１で示される
ような曝気スケジュールによって間欠的に曝気され、活
性汚泥室３内で汚水の硝化処理及び脱窒処理の両処理が
行われる。散気管１２には電磁弁、空気作動弁等の制御
弁１３が設けられ、制御弁１３の開閉は作動シークエン
スをプログラムした制御タイマー１５で制御されてい
る。そして、膜濾過器１１の膜面表面は、散気管１２か
らの曝気による活性汚泥液の上昇流により汚泥ケーキの
堆積が防止される。The aeration from the air diffuser 12 is intermittently aerated according to the aeration schedule as shown in FIG. 1, and both the nitrification treatment and the denitrification treatment of the wastewater are performed in the activated sludge chamber 3. The air diffuser 12 is provided with a control valve 13 such as a solenoid valve and an air actuated valve, and the opening and closing of the control valve 13 is controlled by a control timer 15 programmed with an actuation sequence. Then, on the membrane surface of the membrane filter 11, accumulation of sludge cake is prevented by the upward flow of the activated sludge liquid due to aeration from the air diffuser 12.
【００１９】図１の曝気スケジュールでは、初めの一定
時間は散気管１２から曝気（硝化処理）され、その後、
５〜２０分の間の曝気停止とそれに続く２分以内のパル
ス曝気が複数回（図１では４回）、繰り返される（脱窒
処理）。以下、曝気スケジュールに従って硝化処理及び
脱窒処理が繰り返される。なお、曝気停止中も吸引ポン
プ１６は稼働させたままにしておく。In the aeration schedule shown in FIG. 1, aeration (nitrification treatment) is performed from the air diffusing tube 12 for a certain time at the beginning, and then,
The aeration stop for 5 to 20 minutes and the subsequent pulse aeration within 2 minutes are repeated a plurality of times (4 times in FIG. 1) (denitrification treatment). Thereafter, the nitrification treatment and the denitrification treatment are repeated according to the aeration schedule. It should be noted that the suction pump 16 is kept operating even while the aeration is stopped.
【００２０】定期保守点検時に、活性汚泥室３の汚泥濃
度をチェックした上、空気弁１９を開け、エアーリフト
ポンプ２０を作動させ、活性汚泥室３内の分解処理困難
な汚泥（余剰汚泥）を汚泥貯留室４に搬送する。その
際、汚泥貯留室４の液面が越流口２１を越える場合、汚
泥貯留室４の上澄が流量調整室２へオーバーフローし、
原水（汚水）と混ざり、以下、原水と同じ経路で処理さ
れる。At the time of regular maintenance and inspection, the sludge concentration in the activated sludge chamber 3 is checked, the air valve 19 is opened, and the air lift pump 20 is operated to remove sludge (excess sludge) in the activated sludge chamber 3 which is difficult to decompose. It is transported to the sludge storage chamber 4. At that time, when the liquid level of the sludge storage chamber 4 exceeds the overflow port 21, the supernatant of the sludge storage chamber 4 overflows into the flow rate adjustment chamber 2,
It is mixed with raw water (sewage) and is treated in the same way as raw water.
【００２１】[0021]
【発明の効果】本発明は膜濾過を用いる汚水の間欠曝気
処理法であって、一定時間曝気をしない嫌気的分解処理
（脱窒処理）時の撹拌を撹拌羽根やポンプによらないで
パルス曝気によって行うもので、撹拌動力を節約（省エ
ネルギー）できると共に汚水を高度に処理できる。INDUSTRIAL APPLICABILITY The present invention is a method for intermittent aeration of sewage using membrane filtration, in which aeration during anaerobic decomposition (denitrification) without aeration for a certain period of time is performed by pulse aeration without using a stirring blade or pump. By doing so, the agitation power can be saved (energy saving) and sewage can be treated highly.
【図１】本発明の間欠曝気処理方法における曝気のタイ
ムスケジュールを表すグラフである。FIG. 1 is a graph showing a time schedule of aeration in an intermittent aeration treatment method of the present invention.
【図２】本発明の間欠曝気処理方法を実施できる浄化槽
の正面模式図である。FIG. 2 is a schematic front view of a septic tank capable of carrying out the intermittent aeration treatment method of the present invention.
【図３】図２の浄化槽の平面模式図である。FIG. 3 is a schematic plan view of the septic tank of FIG.
１…浄化槽本体 ２…流量調整室 ３…好気活性汚泥室 ４…汚泥貯留室 ５…マンホール蓋 ６…流入管 ７…散気管 ８…網状プラスチ
ック濾床 ９…濾床取っ手 １０…エアリフトポ
ンプ １１…膜濾過器 １２…散気管 １３…制御弁 １４…空気ブロア １５…制御タイマー １６…吸引ポンプ １７…滅菌器 １８…放流管 １９…空気弁 ２０…エアリフト
ポンプ ２１…越流口1 ... Septic tank main body 2 ... Flow control chamber 3 ... Aerobic activated sludge chamber 4 ... Sludge storage chamber 5 ... Manhole cover 6 ... Inflow pipe 7 ... Air diffuser 8 ... Reticulated plastic filter bed 9 ... Filter bed handle 10 ... Air lift pump 11 ... Membrane filter 12 ... Air diffuser 13 ... Control valve 14 ... Air blower 15 ... Control timer 16 ... Suction pump 17 ... Sterilizer 18 ... Discharge pipe 19 ... Air valve 20 ... Air lift pump 21 ... Overflow port
Claims (2)
れた膜濾過器とその膜濾過器の下方に散気管が設けられ
た活性汚泥室へ、汚水を供給し、活性汚泥液を膜濾過器
で濾過しながら、散気管から一定時間曝気をする好気的
分解処理と一定時間曝気をしない嫌気的分解処理の両処
理を繰り返す汚水の間欠曝気処理方法であって、前記嫌
気的分解処理は予め定められた時間の曝気停止とそれに
続くパルス曝気の繰返しからなることを特徴とする、汚
水の処理方法。1. A sewage is supplied to an activated sludge chamber, which is provided by immersing it in a liquid in which the activated sludge is retained and an air diffusing pipe is provided below the oscillating filter. A method for intermittent aeration treatment of sewage, which repeats both aerobic decomposition treatment in which aeration is conducted for a certain period of time and anaerobic decomposition treatment in which aeration is not conducted for a certain period of time while filtering with a membrane filter. A treatment method for sewage, characterized in that the treatment consists of stopping aeration for a predetermined time and then repeating pulse aeration.
分間の曝気停止であり、パルス曝気が２分を超えない
間、曝気量０．０５〜５．０ｍ3／ｍ3／ｍｉｎで曝気す
るものである、請求項１の汚水の処理方法。2. Aeration stop for a predetermined time is 5 to 20.
Min is the aeration stop, while the pulse aeration does not exceed 2 minutes, is to aeration in the aeration amount 0.05~5.0m 3 / m 3 / min, method of processing sewage according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP564096A JPH09192688A (en) | 1996-01-17 | 1996-01-17 | Method for intermittently aerating sewage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP564096A JPH09192688A (en) | 1996-01-17 | 1996-01-17 | Method for intermittently aerating sewage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09192688A true JPH09192688A (en) | 1997-07-29 |
Family
ID=11616744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP564096A Pending JPH09192688A (en) | 1996-01-17 | 1996-01-17 | Method for intermittently aerating sewage |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09192688A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100327151B1 (en) * | 1999-04-10 | 2002-03-13 | 박호군 | A Process for Treatment of Wastewater Using Intermittently Aerated Membrane Bioreactor |
| KR100357042B1 (en) * | 2000-04-17 | 2002-11-07 | 주식회사 건화엔지니어링 | Water treatment apparatus and method using granular membrane bio-reactor |
| US6899811B2 (en) | 2000-05-04 | 2005-05-31 | Zenon Environmental Inc. | Immersed membrane apparatus |
| US7186343B2 (en) | 1998-10-09 | 2007-03-06 | Zenon Technology Partnership | Cyclic aeration system for submerged membrane modules |
| WO2009112618A1 (en) * | 2008-03-12 | 2009-09-17 | Universisdad De Alicante | Compact system for treating household waste water |
| JP2014184372A (en) * | 2013-03-22 | 2014-10-02 | Fuji Clean Co Ltd | Wastewater treatment system and blower |
| CN111470629A (en) * | 2020-04-17 | 2020-07-31 | 西安建筑科技大学 | Facultative active sludge sewage treatment method |
-
1996
- 1996-01-17 JP JP564096A patent/JPH09192688A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7820050B2 (en) | 1998-10-09 | 2010-10-26 | Zenon Technology Partnership | Cyclic aeration system for submerged membrane modules |
| US7186343B2 (en) | 1998-10-09 | 2007-03-06 | Zenon Technology Partnership | Cyclic aeration system for submerged membrane modules |
| US7198721B2 (en) | 1998-10-09 | 2007-04-03 | Zenon Technology Partnership | Cyclic aeration system for submerged membrane modules |
| US7347942B2 (en) | 1998-10-09 | 2008-03-25 | Zenon Technology Partnership | Cyclic aeration system for submerged membrane modules |
| US7625491B2 (en) | 1998-10-09 | 2009-12-01 | Zenon Technology Partnership | Cyclic aeration system for submerged membrane modules |
| US7922910B2 (en) | 1998-10-09 | 2011-04-12 | Zenon Technology Partnership | Cyclic aeration system for submerged membrane modules |
| KR100327151B1 (en) * | 1999-04-10 | 2002-03-13 | 박호군 | A Process for Treatment of Wastewater Using Intermittently Aerated Membrane Bioreactor |
| KR100357042B1 (en) * | 2000-04-17 | 2002-11-07 | 주식회사 건화엔지니어링 | Water treatment apparatus and method using granular membrane bio-reactor |
| US6899811B2 (en) | 2000-05-04 | 2005-05-31 | Zenon Environmental Inc. | Immersed membrane apparatus |
| WO2009112618A1 (en) * | 2008-03-12 | 2009-09-17 | Universisdad De Alicante | Compact system for treating household waste water |
| ES2330824A1 (en) * | 2008-03-12 | 2009-12-15 | Universidad De Alicante | Compact system for treating household waste water |
| JP2014184372A (en) * | 2013-03-22 | 2014-10-02 | Fuji Clean Co Ltd | Wastewater treatment system and blower |
| CN111470629A (en) * | 2020-04-17 | 2020-07-31 | 西安建筑科技大学 | Facultative active sludge sewage treatment method |
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