JPH01284394A - Cleaning tank - Google Patents
Cleaning tankInfo
- Publication number
- JPH01284394A JPH01284394A JP11151688A JP11151688A JPH01284394A JP H01284394 A JPH01284394 A JP H01284394A JP 11151688 A JP11151688 A JP 11151688A JP 11151688 A JP11151688 A JP 11151688A JP H01284394 A JPH01284394 A JP H01284394A
- Authority
- JP
- Japan
- Prior art keywords
- tank
- aeration
- sewage
- aeration tank
- advection
- 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.)
- Granted
Links
- 238000004140 cleaning Methods 0.000 title abstract 2
- 238000005273 aeration Methods 0.000 claims abstract description 147
- 239000010865 sewage Substances 0.000 claims abstract description 49
- 239000007788 liquid Substances 0.000 claims abstract description 33
- 244000005700 microbiome Species 0.000 claims abstract description 14
- 238000011282 treatment Methods 0.000 claims abstract description 14
- 230000010349 pulsation Effects 0.000 claims abstract description 7
- 238000004062 sedimentation Methods 0.000 claims description 13
- 239000006228 supernatant Substances 0.000 claims description 9
- 230000001737 promoting effect Effects 0.000 claims description 4
- 230000003197 catalytic effect Effects 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 abstract description 6
- 238000004659 sterilization and disinfection Methods 0.000 description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 239000002351 wastewater Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 230000001954 sterilising effect Effects 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
Landscapes
- Treatment Of Biological Wastes In General (AREA)
Abstract
Description
この発明は、住宅や小規模建築物などからの汚水を処理
するに好適な浄化槽に関するものである。The present invention relates to a septic tank suitable for treating sewage from houses, small-scale buildings, etc.
従来のこの種の浄化槽は、貯留槽と接触ばっ気槽と沈殿
槽の組合せか、あるいは貯留槽と浮遊ばっ気槽と沈殿槽
の組合せが一般的であって、このような浄化槽により、
住宅や小規模建築物などから排出される汚水を処理して
いる。Conventional septic tanks of this type are generally a combination of a storage tank, a contact aeration tank, and a sedimentation tank, or a combination of a storage tank, a floating aeration tank, and a sedimentation tank.
It treats wastewater discharged from houses and small buildings.
しかしながら、住宅や小規模建築物などからの汚水は、
流量変動が大きく、しかも間歇的に排出されるため、従
来の接触ばっ気または浮遊ばっ気による浄化槽では放流
水質が極めて不安定である。
即ち、従来の接触ばっ気性による浄化槽では、接触濾材
に微生物が膜として固着し、遊離し難いため、汚水流量
の変動に対して強いが、汚水中の有機物と微生物との接
触機能は浮遊ばっ気の場合に比して劣るため、大容積の
接触濾材が必要となるという問題点があった。
また、浮遊ばっ気による浄化槽の場合は、生物密度を濃
くすれば、汚水有機物の分解速度は増大するが、汚水流
入量が多く且つそれに伴う処理水排出量が多いとき、処
理途中で生物（ＳＳ）が次の沈殿槽に押し流され、浮遊
ばっ気槽内における生物密度（ＭＬＳＳ）を高濃度に維
持できなくなるという問題点があったつ
この発明は上記のような問題点を解消するためになされ
たもので、汚水が間歇的に流入し且つ汚水流入量が変動
しても、その汚水を効率よく処理することができ、安定
した良質の清澄水を放流することができると共に、脱窒
・脱リンをも効率よく行うことができる浄化槽を提供す
ることを目的とする。However, sewage from houses and small buildings, etc.
Because the flow rate fluctuates widely and the water is discharged intermittently, the quality of the discharged water is extremely unstable in conventional septic tanks using contact aeration or floating aeration. In other words, in conventional catalytic aeration septic tanks, microorganisms adhere to the contact filter medium as a film and are difficult to release, so they are resistant to fluctuations in wastewater flow rate. The problem is that a contact filter medium with a large capacity is required. In the case of a septic tank with suspended aeration, increasing the density of organisms increases the decomposition rate of sewage organic matter. ) was washed away to the next sedimentation tank, making it impossible to maintain a high concentration of living organisms (MLSS) in the floating aeration tank.This invention was made to solve the above problems. Even if sewage inflows intermittently and the amount of sewage inflow fluctuates, the sewage can be efficiently treated, stable high-quality clear water can be discharged, and it can also be denitrified and dephosphorized. The purpose of the present invention is to provide a septic tank that can efficiently perform the following steps.
この発明に係る浄化槽は、汚水が間歇的に流入し且つ流
入汚水量に変動がある浄化槽を対象とし、上記汚水を受
け入れ間歇ばっ気処理を行う第１ばっ気槽と、この第１
ばっ気槽から混合液を移流される第２ばっ気槽と、この
第２ばっ気槽から混合液を流入させて上澄液を放流す為
沈殿槽との組合せから成り、汚水の非流入時に上記第２
ばっ気槽でのばっ気による該槽内液面の盛り上がり脈動
によって、その第２ばっ気槽内の浮遊微生物を上記第１
ばっ気槽内に返送するようにしたものである。
また、第２ばっ気槽のばっ気位置は、第１ばっ気槽と第
２ばっ気槽とを連通ずる移流孔のほぼ直下にすることが
、後述する理由によって効果的である。
さらに、沈殿槽の上澄液は、第１ばっ気槽の汚水流入量
１日分を均等に均した定量排出ポンプで消毒槽に移流さ
せ、この消毒槽から消毒後の清澄水を放流させることが
一層効果的である。The septic tank according to the present invention is intended for a septic tank in which sewage flows intermittently and the amount of inflowing sewage fluctuates, and includes a first aeration tank that receives the sewage and performs intermittent aeration treatment;
It consists of a second aeration tank to which the mixed liquid is advected from the aeration tank, and a settling tank to allow the mixed liquid to flow in from the second aeration tank and discharge the supernatant liquid. 2nd above
Due to the rise and pulsation of the liquid level in the tank due to aeration in the aeration tank, the floating microorganisms in the second aeration tank are transferred to the first tank.
It is designed to be returned to the aeration tank. Further, it is effective for the aeration position of the second aeration tank to be located almost directly below the advection hole that communicates the first aeration tank and the second aeration tank for reasons described later. Furthermore, the supernatant liquid of the sedimentation tank is advected to the disinfection tank using a metering discharge pump that evenly equalizes the amount of wastewater flowing into the first aeration tank for one day, and the clear water after disinfection is discharged from this disinfection tank. is even more effective.
この発明における浄化槽は、汚水が間歇的に流入し且つ
流入汚水量が変動しても、汚水の非流入時には、第２ば
っ気槽でのばっ気によって該槽内液面が盛り上がり脈動
し、この脈動によって、第２ばっ気槽の浮遊微生物が第
１ばっ気槽に返送される。もって、汚水の間歇流入時に
第１ばっ気槽内の微生物が第２ばっ気槽に移流しても、
その微生物は汚水の流入がない時、上述のように第１ば
っ気槽へ自動的に戻されることとなり、第１ばっ気槽の
微生物（ＳＳ）？１１度が低下するようなことはない。
むしろ、第２ばっ気槽の接触濾材から剥離した浮遊微生
物も第１ばっ気槽に移流してくるので、第１ばっ気槽内
の微生物密度（ＭＬＳＳ）は増加する。さらに、流入汚
水量が大きく変動しても、沈殿槽からの排出を定量排出
ポンプで１日の平均汚水量に絞られているため、水位変
動による受容容量が対応して過大な流入ショックも緩和
する。従って、第１ばっ気槽内を常時高濃度に維持でき
、この状態での第１ばっ気槽の間歇ばっ気によって硝化
と脱窒反応が促進し、効果的な脱窒が行われる。また、
同時に脱リンも行われる。
また、第１ばっ気槽と第２ばっ気槽とを連ｊ■する移流
孔のほぼ直下に第２ばっ気槽の散気装置を位置させたこ
とにより、汚水の非流入時には第２ばっ気槽のばっ気に
より上記移流孔の近傍で液面を盛り上がり脈動させるこ
とができ、これによって第２ばっ気槽の浮遊微生物を第
１ばっ気槽に円滑に返送させることができる。
さらに、沈殿槽の上澄液が、第１ばっ気槽の汚水流入量
の変化を均等に均した定量排出ポンプによって消毒槽に
移流されので、この消毒槽から消毒後のｆＲ清澄水平均
流量で放流させることができる。In the septic tank of the present invention, even if sewage flows intermittently and the amount of inflowing sewage fluctuates, when sewage does not flow in, the liquid level in the tank rises and pulsates due to aeration in the second aeration tank. The pulsation causes airborne microorganisms in the second aeration tank to be returned to the first aeration tank. Therefore, even if microorganisms in the first aeration tank are advected to the second aeration tank during intermittent inflow of sewage,
When there is no inflow of sewage, the microorganisms are automatically returned to the first aeration tank as described above, and the microorganisms (SS) in the first aeration tank? There is no chance that the temperature will drop to 11 degrees. Rather, the floating microorganisms detached from the contact filter medium of the second aeration tank also advect into the first aeration tank, so that the microorganism density (MLSS) in the first aeration tank increases. Furthermore, even if the amount of inflowing sewage fluctuates greatly, the discharge from the sedimentation tank is limited to the daily average amount of sewage by a metering discharge pump, so the receiving capacity due to water level fluctuations will be adjusted and the shock of excessive inflow will be alleviated. do. Therefore, a high concentration can be maintained in the first aeration tank at all times, and intermittent aeration in the first aeration tank in this state promotes nitrification and denitrification reactions, and effective denitrification is performed. Also,
Dephosphorization is also performed at the same time. In addition, by locating the diffuser of the second aeration tank almost directly below the advection hole that connects the first aeration tank and the second aeration tank, the second aeration tank is Aeration in the tank can cause the liquid level to swell and pulsate in the vicinity of the advection holes, thereby allowing floating microorganisms in the second aeration tank to be smoothly returned to the first aeration tank. Furthermore, the supernatant liquid of the sedimentation tank is advected to the disinfection tank by a metering discharge pump that equalizes the change in the amount of sewage flowing into the first aeration tank, so that the average flow rate of fR clear water from this disinfection tank after disinfection is It can be released.
以下、この発明の一実施例を図面に基づいて説明する。
第１図および第２図において、１は単一の浄化槽であり
、この浄化槽１内には、流入管２からの流入汚水を受け
入れて嫌気性処理を行う夾雑物貯留槽（以下、貯留槽と
いう）３と、この貯留槽３から移流する汚水を受け入れ
間歇ばっ気処理を行う第１ばっ気槽４と、この第１ばっ
気槽４から移流する混合液を接触ばっ気処理するための
第２ばっ気槽５と、この第２ばっ気槽５内で接触ばっ気
処理された混合液を流入させる沈殿槽６とがそれぞれが
区分形成されている。
７は上記貯留槽２内に収納配置された嫌気性濾過材、８
は上記貯留槽２内における嫌気性濾過材７下部の汚水を
上記第１ばっ気槽３の底部側に移流させるバッフルを兼
ねた移流管、９は第１ばっ気槽４内における上記移流管
８の下端側近傍に配置された散気装置、１０は上記第１
ばっ気槽４と第２ばっ気槽５とを連通ずる移流孔であり
、この移流孔１０は第１ばっ気槽４内に設けられた移流
バッフル１１によって囲繞されている。
Ｉ２は上記移流孔１０の上峰部に連設されて第２ばっ気
槽５内の斜め下方に突出し、この第２ばっ気槽５内の浮
′ａ微生物（ＳＳ）を上記移流孔１０から上記第１ばっ
気槽４内に返送促進させるためのｓｓ返送促進笠である
。
１３は第２ばっ気槽５に収納配置された好気性接触濾材
、１４は第２ばっ気槽５の底部側に配置された散気装置
であり、この散気装置１４は上記ＳＳ返送促進笠１２の
ほぼ直下に位置づけされている。そして、上記ＳＳ返送
促進笠１２と散気装置１４との間には、ばっ気上昇移流
管１５が配置されている。
６ａは沈殿槽６の傾斜壁であり、この傾斜壁６ａは上記
沈殿槽６内での分離汚泥を沈降促進させて上記第２ばっ
気槽５の底部側に重力沈降返送させる。
１６は上記沈殿槽６の上部側に設けられ、この沈殿槽６
の上澄液を流入させるポンプ室、１７はこのポンプ室１
６内に配置された足継排出ポンプであり、この定量排出
ポンプ１７によって、上記ポンプ室１６内に流入した上
澄液を、上記沈殿槽６の−Ｆ部側に区分形成された消毒
槽１８内に移流させるようにしている。ここで、上記定
量排出ポンプ１７は、貯留槽３の汚水流入量をほぼ平均
した流量分の上澄液を上記消毒槽１５内に移流させる。
従って、上記消毒槽１８からは消毒された清澄液が上記
汚水流入量分だけ平均的に放流される。
なお、上記定量排出ポンプ１７のの詳細な構成について
は実公昭５８−４３９８８号に開示されている。１９は
薬剤筒である。
次に動作について説明する。貯留槽３内に流入管２から
流入した汚水は下向流となって嫌気性濾過材７を通過す
ることにより、粗大固形物を分離し、移流管８を通って
第１ばっ気槽４内に移流する。第１ばっ気槽４内では、
散気装置９によって間歇ばっ気処理される。これにより
、硝化反応と脱窒反応が起こり脱窒が行われる。また、
同時に脱リンも行われる。そして、汚水が流入すると、
ＳＳを含んだばっ気温合液が移流バフフル１１内を上昇
して移流孔１０から第２ばっ気槽５内に移流する。第２
ばっ気槽５内では、散気装置Ｉ４のばっ気による混合液
がばっ気上昇移流管１５を上昇した後、好気性接触濾材
１３を下向流で通過することにより、所謂接触ばっ気処
理が行われる。次いで、そのばっ気温合液は沈殿槽６内
に流入し、ここで、汚泥は傾斜壁６ａに沿って第２ばっ
気槽５内の底部側に沈降返送され、且つ上澄液はポンプ
室１６内に流入することにより、定量排出ポンプエフで
１日の汚水流入量を平均に均した流量で消毒槽１８内に
移流される。
したがって、１時的に過大な汚水流入量があっても沈殿
槽６からの排出が制限されるため、第１ばっ気槽４．第
２ばっ気槽５．沈殿槽６の液面水位は上昇し、各種の有
効容積は膨脂した結果となり、各種の処理滞留時間も確
保され、知略移流も防がれる。
そして、平均化した微少流量の処理水が上記消毒槽１８
内で消毒され、系外に放流される。
以上の汚水処理サイクルは、貯留槽３内に汚水がピーク
流量で流入している場合であり、その汚水流入が中断す
ると、第１ばっ気槽４から第２ばっ気槽５への移流が微
少量となり、移流ハフフル１１内はほぼ静止状態となる
第２ばっ気槽５内においては、散気装置１４によるばっ
気が継続されており、しかも、その散気装置１４が移流
孔１０のほぼ直下に位置しているため、上記散気装置１
４のばっ気によって第２ばっ気槽５内における上記移流
孔１０近傍の液面が第３図および第４図に示すように盛
り上がり脈動する。この脈動によって、上記液面付近の
ＳＳが上記移流孔１０から第１ばっ気槽４内に返送され
る。ＳＳ返送促進笠１２が設けられていれば、このＳＳ
返送の速度はより促進される。これによって、第１ばっ
気槽４内のＳＳＳ変度低下するようなことはなく、むし
ろ、−ト述のように、第２ばっ気槽５内の好気性接触濾
材１３から分離して浮遊するＳＳも返送されるため、第
１ばっ気槽４内の生物密度（ＭＬＳＳ）は増加する。こ
れにより、流入汚水量が大きく変動しても、第１ばっ気
槽４内を高濃度状態に維持でき、効果的に有機物の除去
と脱窒が行える。
次に、上記ＳＳ返送の実験例について述べる。
第２ばっ気槽５の散気により（第１ばっ気槽４の散気、
無散気に抱らず）第２ばっ気槽５のＳＳは第１ばっ気槽
４に返送され、第２ばっ気槽５のＳＳはほぼ無くなった
。
この返送形態は散気による水面の持ら上がりに脈動があ
るからであり、逆流と１１１ａ流が渦流を形成している
。
汚水の流入がなければ、第１ばっ気槽４の散気風量の多
少に抱らず、移流バッフル１１内にＳＳは浸入せず、こ
の場合、移流バフフル１１の下端が浮遊面になっている
。
汚水流入があると、第１ばっ気槽４の浮遊ＳＳは第２ば
っ気槽５にキャリオーバする。そして、流入停止時にＳ
Ｓのみが返送されてくる。
１０ ｆｆ／ｍｉｎ以上の流量で流入する時、第２ばっ
気槽５にＳＳが移流することを防ぐことは困難である。
しかし、流入停止時にＳＳの返送速度をより増加させる
ことは、移流孔１０近辺の形状を工夫すれば可能である
。
そこで、上記実施例で述べた通り、移流孔１０にＳＳ返
送促進笠１２を取り付けてＳＳの返送速度をテストした
ところ、下記の表Ｉおよび表２に示すように、ＳＳ返送
速度が飛曜的に増加した。
表１ 表２
上記表１はＷ Ｌ （ＩＪＬ ＋ ５ｍｍ）での第２ば
っ気槽のＳＶ、。の変化であり、上記表２はＷ Ｌ （
ＬＷＬ ＋ １００ｍｍ）での第２ばっ気槽のＳＶ、、
の変化である。Hereinafter, one embodiment of the present invention will be described based on the drawings. In Figures 1 and 2, 1 is a single septic tank, and inside this septic tank 1 is a contaminant storage tank (hereinafter referred to as a storage tank) that receives inflow sewage from an inflow pipe 2 and performs anaerobic treatment. ) 3, a first aeration tank 4 that receives wastewater advected from this storage tank 3 and performs intermittent aeration treatment, and a second aeration tank 4 that performs contact aeration treatment of the mixed liquid advected from this first aeration tank 4. An aeration tank 5 and a settling tank 6 into which the mixed liquid subjected to the contact aeration treatment in the second aeration tank 5 flows are each formed separately. 7 is an anaerobic filter material housed in the storage tank 2;
9 is an advection pipe that also serves as a baffle for advecting the waste water below the anaerobic filter material 7 in the storage tank 2 to the bottom side of the first aeration tank 3; 9 is the advection pipe 8 in the first aeration tank 4; 10 is a diffuser disposed near the lower end of the first
This is an advection hole that communicates the aeration tank 4 and the second aeration tank 5, and this advection hole 10 is surrounded by an advection baffle 11 provided in the first aeration tank 4. I2 is connected to the upper peak of the advection hole 10 and protrudes diagonally downward into the second aeration tank 5, and carries the floating microorganisms (SS) in the second aeration tank 5 from the advection hole 10. This is a ss return promotion shade for promoting return to the first aeration tank 4. 13 is an aerobic contact filter material housed in the second aeration tank 5; 14 is an aeration device disposed on the bottom side of the second aeration tank 5; It is located almost directly below No. 12. Between the SS return promotion shade 12 and the air diffuser 14, an aeration upward advection pipe 15 is arranged. Reference numeral 6a denotes an inclined wall of the settling tank 6, and this inclined wall 6a promotes settling of the separated sludge in the settling tank 6, and returns it to the bottom side of the second aeration tank 5 by gravity. 16 is provided on the upper side of the sedimentation tank 6, and this sedimentation tank 6
A pump chamber into which the supernatant fluid flows; 17 is the pump chamber 1;
The metering discharge pump 17 is a foot discharge pump disposed in the sedimentation tank 6, and the supernatant liquid flowing into the pump chamber 16 is transferred to a disinfection tank 18 which is divided and formed on the −F side of the sedimentation tank 6. I am trying to have it advected inside. Here, the quantitative discharge pump 17 advects the supernatant liquid into the disinfection tank 15 at a flow rate that is approximately the average of the amount of sewage flowing into the storage tank 3 . Therefore, the sterilized clarified liquid is discharged from the sterilization tank 18 in an amount equal to the amount of sewage flowing in on average. The detailed structure of the metering pump 17 is disclosed in Japanese Utility Model Publication No. 58-43988. 19 is a medicine cylinder. Next, the operation will be explained. Sewage flowing into the storage tank 3 from the inflow pipe 2 becomes a downward flow and passes through the anaerobic filter material 7 to separate coarse solids, and then passes through the advection pipe 8 into the first aeration tank 4. advect to. Inside the first aeration tank 4,
Intermittent aeration is performed by the aeration device 9. As a result, a nitrification reaction and a denitrification reaction occur, and denitrification is performed. Also,
Dephosphorization is also performed at the same time. And when sewage flows in,
The aerated air mixture containing SS rises in the advection buff full 11 and advects into the second aeration tank 5 from the advection hole 10. Second
In the aeration tank 5, the liquid mixture created by the aeration of the aeration device I4 rises through the aeration upflow advection pipe 15, and then passes through the aerobic contact filter medium 13 in a downward flow, thereby performing so-called contact aeration treatment. It will be done. Next, the mixed aeration liquid flows into the settling tank 6, where the sludge settles and is returned to the bottom side of the second aeration tank 5 along the inclined wall 6a, and the supernatant liquid flows into the pump chamber 16. By flowing into the sterilization tank 18, the sewage is advected into the disinfection tank 18 by a constant discharge pump F at a flow rate equal to the average daily amount of sewage inflow. Therefore, even if there is a temporarily excessive amount of sewage inflow, the discharge from the settling tank 6 is restricted, so that the first aeration tank 4. 2nd aeration tank5. The liquid level in the sedimentation tank 6 rises, and various effective volumes expand, resulting in the retention time of various treatments being secured and intentional advection being prevented. Then, the averaged minute flow rate of the treated water is transferred to the disinfection tank 18.
It is disinfected inside and discharged outside the system. The above sewage treatment cycle is a case where sewage is flowing into the storage tank 3 at a peak flow rate, and when the sewage inflow is interrupted, there is a slight advection from the first aeration tank 4 to the second aeration tank 5. In the second aeration tank 5 , where the amount is small and the inside of the advection huff full 11 is almost stationary, aeration is continued by the aeration device 14 , and moreover, the aeration device 14 is located almost directly below the advection hole 10 . Since the air diffuser 1 is located at
4, the liquid level in the second aeration tank 5 near the advection hole 10 rises and pulsates as shown in FIGS. 3 and 4. Due to this pulsation, the SS near the liquid level is returned from the advection hole 10 into the first aeration tank 4. If the SS return promotion shade 12 is provided, this SS
The speed of return shipping is further facilitated. As a result, the SSS variation in the first aeration tank 4 does not decrease, but rather, as mentioned above, it floats separated from the aerobic contact filter medium 13 in the second aeration tank 5. Since the SS is also returned, the biological density (MLSS) in the first aeration tank 4 increases. Thereby, even if the amount of inflowing sewage fluctuates greatly, the inside of the first aeration tank 4 can be maintained at a high concentration state, and organic matter can be effectively removed and denitrified. Next, an experimental example of the above SS return will be described. Due to the aeration in the second aeration tank 5 (the aeration in the first aeration tank 4,
The SS in the second aeration tank 5 was returned to the first aeration tank 4 (without air diffusion), and the SS in the second aeration tank 5 was almost completely exhausted. This return form is because there is a pulsation in the lifting of the water surface due to aeration, and the back flow and the 111a flow form a vortex flow. If there is no inflow of sewage, SS will not enter the advection baffle 11 regardless of the amount of air diffused in the first aeration tank 4, and in this case, the lower end of the advection baffle 11 becomes a floating surface. . When sewage flows in, the floating SS in the first aeration tank 4 carries over to the second aeration tank 5. Then, when the inflow stops, S
Only S is returned. When flowing in at a flow rate of 10 ff/min or more, it is difficult to prevent SS from advecting into the second aeration tank 5. However, it is possible to further increase the return speed of SS when the inflow is stopped by modifying the shape of the vicinity of the advection hole 10. Therefore, as described in the above embodiment, when the SS return speed was tested by attaching the SS return promotion shade 12 to the advection hole 10, the SS return speed was found to be very high, as shown in Tables I and 2 below. increased to Table 1 Table 2 The above Table 1 shows the SV of the second aeration tank at W L (IJL + 5 mm). Table 2 above shows W L (
SV of the second aeration tank at LWL + 100mm),
This is a change in
以」二のように、この発明によれば、第１ばっ気槽と第
２ばっ気槽との組合せにより、汚水流入が間歇的で且つ
汚水流入量が変動しても、汚水の流入停止時には、第２
ばっ気槽のばっ気による液面の盛り上がり脈動によって
第２ばっ気槽内の浮遊生物が第１ばっ気槽に返送される
ので、第１ばっ気槽内の生物濃度を常時安定した高濃度
状態に維持でき、従って、この状態で第１ばっ気槽を間
歇ばっ気すれば、硝化反応と脱窒反応が促進して効果的
な脱窒が行われる。また、同時に脱リンも行われる。
また、第１ばっ気槽の非ばつ気晴に汚水の流入があって
も第２ばっ気槽は常時ばっ気されているため、安定した
処理水を放流できるという効果がある。
さらに、沈殿槽の上澄液が、定量排出ポンプによって消
毒槽に移流されので、この消毒槽から消毒後の清澄水を
平均流星で放流させることができる。
以上、この発明では、汚水流入が間歇的で且つ汚水流入
量が変動しても、安定した汚水処理を効率よく行うこと
ができ、例えば、家庭用合併汚水処理の水質安定と効果
的な脱窒が図れる。As described above, according to the present invention, by the combination of the first aeration tank and the second aeration tank, even if the inflow of wastewater is intermittent and the amount of inflow of wastewater fluctuates, when the inflow of wastewater stops, , second
The floating organisms in the second aeration tank are returned to the first aeration tank due to the rise and pulsation of the liquid level due to the aeration in the aeration tank, so the concentration of organisms in the first aeration tank is always kept in a stable high concentration state. Therefore, if the first aeration tank is aerated intermittently in this state, the nitrification reaction and denitrification reaction are promoted and effective denitrification is performed. Moreover, dephosphorization is also performed at the same time. Further, even if sewage flows into the non-vaporizing area of the first aeration tank, the second aeration tank is constantly aerated, so there is the effect that treated water can be discharged in a stable manner. Further, since the supernatant liquid of the sedimentation tank is advected to the disinfection tank by the metering discharge pump, the clear water after disinfection can be discharged from the disinfection tank at an average rate. As described above, in this invention, even if the inflow of sewage is intermittent and the amount of sewage inflow fluctuates, stable sewage treatment can be performed efficiently. can be achieved.
第１図はこの発明の一実施例による浄化槽の横断平面図
、第２図は同浄化槽の縦断面図、第３図はＳＳ返送促進
笠を取り付けた状態での液面盛り上がり脈動状態を示す
断面図、第４図はＳＳ返送促進筒がない状態での液面盛
り上がり脈動状態を示す断面図である。
図において、１は浄化槽、４は第１ばつ気槽、５は第２
ばっ気槽、６は沈殿槽、９は散気装置、１０は移流孔、
１１は移流バッフル、１４は散気装置、１７は定量排出
ポンプ、１８は消毒槽である。
特許出願人 西原ネオ工業株式会社
（外２名）−２□′−′１
第３図
第４因Fig. 1 is a cross-sectional plan view of a septic tank according to an embodiment of the present invention, Fig. 2 is a longitudinal sectional view of the same septic tank, and Fig. 3 is a cross-sectional view showing a rising liquid level and pulsating state with an SS return promotion shade attached. FIG. 4 is a sectional view showing a pulsating state in which the liquid level rises without the SS return promoting tube. In the figure, 1 is a septic tank, 4 is a first aeration tank, and 5 is a second aeration tank.
An aeration tank, 6 a settling tank, 9 a diffuser, 10 an advection hole,
11 is an advection baffle, 14 is an aeration device, 17 is a metered discharge pump, and 18 is a disinfection tank. Patent applicant: Nishihara Neo Kogyo Co., Ltd. (2 others) -2□'-'1 Figure 3 Cause 4
Claims (2)
る浄化槽において、上記汚水を受け入れ間歇ばっ気処理
を行う第１ばっ気槽と、この第１ばっ気槽から液を移流
させ、該移流液の接触ばっ気処理を行う第２ばっ気槽と
、この第２ばっ気槽から処理液を流入させて上澄液をほ
ぼ日平均汚水量に等しい流量の定量排出ポンプで放流す
る沈殿槽とを備え、上記汚水の流入時には上記第１ばっ
気槽と第２ばっ気槽と沈殿槽の液面水位を汚水量の変化
量に応じて変動させ、上記汚水の非流入時に上記第２ば
っ気槽でのばっ気による該槽内液面の盛り上がり脈動に
よって、上記第２ばっ気槽内の浮遊微生物を上記第１ば
っ気槽内に返送することを特徴とする浄化槽。(1) In a septic tank into which sewage flows intermittently and the amount of inflowing sewage fluctuates, a first aeration tank that receives the sewage and performs intermittent aeration treatment, and advection of liquid from this first aeration tank, A second aeration tank that performs catalytic aeration treatment of the advection liquid, and a sedimentation system in which the treated liquid is introduced from the second aeration tank and the supernatant liquid is discharged by a metering discharge pump with a flow rate approximately equal to the daily average amount of sewage. tank, when the sewage is flowing in, the liquid levels of the first aeration tank, the second aeration tank, and the settling tank are varied according to the amount of change in the amount of sewage, and when the sewage is not flowing, the liquid levels of the first aeration tank, the second aeration tank, and the settling tank are changed according to the amount of change in the amount of sewage, A septic tank characterized in that floating microorganisms in the second aeration tank are returned to the first aeration tank by the rise and pulsation of the liquid level in the tank due to aeration in the aeration tank.
通隣接し、上記第１ばっ気槽には上記移流孔を囲繞する
移流バッフルが設けられ、且つ第２ばっ気槽内における
上記移流孔の上縁部に斜め下方に突出する返送促進笠を
設け、この返送促進笠のほぼ直下に散気装置が配置され
た請求項１記載の浄化槽。(2) The first aeration tank and the second aeration tank are adjacent to each other through an advection hole, and the first aeration tank is provided with an advection baffle surrounding the advection hole, and the second aeration tank is provided with an advection baffle surrounding the advection hole, and 2. The septic tank according to claim 1, further comprising: a return promoting shade projecting diagonally downward at the upper edge of said advection hole in the tank, and an air diffuser disposed substantially directly below said returning promoting shade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63111516A JP2561317B2 (en) | 1988-05-10 | 1988-05-10 | Septic tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63111516A JP2561317B2 (en) | 1988-05-10 | 1988-05-10 | Septic tank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01284394A true JPH01284394A (en) | 1989-11-15 |
| JP2561317B2 JP2561317B2 (en) | 1996-12-04 |
Family
ID=14563297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63111516A Expired - Fee Related JP2561317B2 (en) | 1988-05-10 | 1988-05-10 | Septic tank |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2561317B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04367789A (en) * | 1991-06-14 | 1992-12-21 | Kubota Corp | Purification tank |
| JPH05309381A (en) * | 1992-05-07 | 1993-11-22 | Kubota Corp | Water-purifier tank |
| WO2009116463A1 (en) * | 2008-03-17 | 2009-09-24 | 株式会社クボタ | Purifying tank |
| JP2009220036A (en) * | 2008-03-17 | 2009-10-01 | Kubota Corp | Septic tank |
| CN104710085A (en) * | 2015-04-02 | 2015-06-17 | 四川省科学城天人环保有限公司 | Efficient AOAS integrated sewage treatment device and process thereof |
-
1988
- 1988-05-10 JP JP63111516A patent/JP2561317B2/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04367789A (en) * | 1991-06-14 | 1992-12-21 | Kubota Corp | Purification tank |
| JPH05309381A (en) * | 1992-05-07 | 1993-11-22 | Kubota Corp | Water-purifier tank |
| WO2009116463A1 (en) * | 2008-03-17 | 2009-09-24 | 株式会社クボタ | Purifying tank |
| JP2009220036A (en) * | 2008-03-17 | 2009-10-01 | Kubota Corp | Septic tank |
| CN104710085A (en) * | 2015-04-02 | 2015-06-17 | 四川省科学城天人环保有限公司 | Efficient AOAS integrated sewage treatment device and process thereof |
| CN104710085B (en) * | 2015-04-02 | 2017-07-07 | 四川省科学城天人环保有限公司 | A kind of efficient AOAS integrated sewage treating apparatus and its technique |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2561317B2 (en) | 1996-12-04 |
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