JPH07102354B2 - Automatic time control device for intermittent aeration - Google Patents
Automatic time control device for intermittent aerationInfo
- Publication number
- JPH07102354B2 JPH07102354B2 JP62031983A JP3198387A JPH07102354B2 JP H07102354 B2 JPH07102354 B2 JP H07102354B2 JP 62031983 A JP62031983 A JP 62031983A JP 3198387 A JP3198387 A JP 3198387A JP H07102354 B2 JPH07102354 B2 JP H07102354B2
- Authority
- JP
- Japan
- Prior art keywords
- aeration
- time
- optical sensor
- intermittent aeration
- timer
- 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.)
- Expired - Fee Related
Links
- 238000005273 aeration Methods 0.000 title claims description 69
- 230000003287 optical effect Effects 0.000 claims description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 25
- 238000004062 sedimentation Methods 0.000 claims description 13
- 239000010865 sewage Substances 0.000 claims description 12
- 238000001514 detection method Methods 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 3
- 230000000977 initiatory effect Effects 0.000 claims 1
- 239000010802 sludge Substances 0.000 description 24
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 12
- 238000000034 method Methods 0.000 description 9
- 229910052757 nitrogen Inorganic materials 0.000 description 6
- 238000004065 wastewater treatment Methods 0.000 description 5
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 description 4
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000005276 aerator Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000003028 elevating effect Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000006228 supernatant Substances 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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)
Description
【発明の詳細な説明】 〔発明の属する技術分野〕 本発明は、高率の窒素除去を目的とした排水処理におい
て実施される、間欠曝気の自動的時間制御装置に関する
ものである。Description: TECHNICAL FIELD The present invention relates to an automatic time control device for intermittent aeration, which is performed in wastewater treatment for the purpose of removing nitrogen at a high rate.
高率の窒素除去を目的とした間欠曝気による排水処理に
おいて、同一の処理水槽内で処理水中のアンモンニア態
窒素に対する硝酸態窒素の比を指標となし、間欠曝気に
おける曝気時間と非曝気時間を増減して排水中の窒素を
高率に除去するという方法は、特広昭56−53435号公報
（発明者 三橋薫 他１名）により公知である。また、
上記方法により窒素除去を行うについて、煩雑なアンモ
ニア態窒素と硝酸態窒素の測定を行う代りに、それに相
関のある汚泥沈降速度を指標として自動的に曝気と非曝
気時間を調節することにより、有機物を分解すると共に
窒素を高率に除去するという方法も特開昭60−172400号
公報（発明者 三橋薫 他１名）により公知である。In wastewater treatment by intermittent aeration for the purpose of removing nitrogen at a high rate, the ratio of nitrate nitrogen to ammonium nitrogen in treated water in the same treated water tank is used as an index, and the aeration time and non-aeration time in intermittent aeration are increased or decreased. A method of removing nitrogen in the waste water at a high rate is known from Japanese Patent Publication No. 56-53435 (Kaoru Mitsuhashi et al.). Also,
Regarding the removal of nitrogen by the above method, instead of performing the complicated measurement of ammonia nitrogen and nitrate nitrogen, by automatically adjusting the aeration and non-aeration time using the sludge sedimentation rate that is correlated with it as an index, organic matter A method of decomposing nitrogen and removing nitrogen at a high rate is also known from JP-A-60-172400 (Kaoru Mitsuhashi et al.).
上記方法により汚泥の沈降速度を利用して曝気と非曝気
の時間を決め、電気回路に組込むについて、光センサー
により検出された時間を通常の電気回路の計時，記憶回
路等によつて間欠曝気処理に再現することは、原理的に
は可能であるが実用上には困難な問題があり、汚泥の沈
降の性状によつては利用が極めて困難な場合がある。即
ち、汚泥の沈降速度というものは、始めのうちは汚泥フ
ロツクの凝集のために緩やかであらが、フロツクが成長
したのち次第に速くなり、最終的には汚泥の圧密のため
再び緩やかになることが多いのである。また、回分放流
式の間欠曝気制御では、間欠曝気の終了後汚泥の沈澱と
放流を行うが、この沈澱時間に界面検出を行うのであ
る。When the aeration and non-aeration time is determined by using the sludge settling rate by the above method and incorporated into an electric circuit, the time detected by an optical sensor is measured by an ordinary electric circuit, and intermittent aeration processing is performed by a memory circuit. Although it is possible in principle to reproduce it, there is a problem in practical use, and it may be extremely difficult to use depending on the property of sludge settling. That is, the sludge settling speed may be moderate at first due to the agglomeration of sludge flocs, but gradually become faster after the flocs grow, and finally become sluggish again due to the sludge consolidation. There are many. Further, in the batch discharge type intermittent aeration control, sludge is settled and discharged after the end of the intermittent aeration, and the interface is detected during this settling time.
そして第５図に示すよう、投光面５′ａと受光面５′ｂ
を所定の間隔により同心状に対向させた透過形光センサ
ーを用い、これを界面上より降下させて投・受光面間の
透過光の減衰により汚泥の沈降界面を検出し、或いは一
定深度に固定して界面の沈降と共に光の増大を検出しよ
うとする技術的思想は既に公知である。しかしこのよう
な探索方式や定位置固定方式で使用される透過形光セン
サーでは、汚水流入量の多寡により汚水処理槽内の水位
に増減を生じた場合、その増減変化には即応し得ないの
であつて、間欠曝気の開始毎に光センサー感知部５′の
設定位置を変更しなければならず、回分放流式間欠曝気
の無人管理は到底困難である。Then, as shown in FIG. 5, the light emitting surface 5'a and the light receiving surface 5'b.
Using a transmission type optical sensor that concentrically faces each other at a predetermined interval, lowers this from the interface and detects the sedimentation interface of sludge by attenuating the transmitted light between the light emitting surface and the light receiving surface, or fixing it at a certain depth Then, the technical idea of trying to detect the increase of light with the sedimentation of the interface is already known. However, with the transmission type optical sensor used in such a search method or fixed position fixed method, when the water level in the sewage treatment tank increases or decreases due to the amount of sewage inflow, it cannot respond immediately to the increase or decrease. Then, the setting position of the optical sensor sensing unit 5'has to be changed every time the intermittent aeration is started, and it is extremely difficult to manage the batch discharge type intermittent aeration unattended.
本発明の目的は、特開昭60−172400号公報所載の排水処
理方法を簡潔な装置によつてローコストに実施せしめ、
汚水処理槽内水位の増減に関係なく汚泥沈降速度の増減
に自動的に対応した、適切な曝気・非曝気時間の得られ
る間欠曝気装置を提供しその無人管理を可能ならしめん
とすることにある。An object of the present invention is to carry out the wastewater treatment method disclosed in JP-A-60-172400 at a low cost with a simple device,
We will provide an intermittent aeration device that automatically responds to changes in the sludge settling speed regardless of changes in the water level in the sewage treatment tank, and that can obtain appropriate aeration and non-aeration time, and if unmanned management is possible, we will do it. is there.
本発明に係る間欠曝気の自動的時間制御装置では２個の
タイマーを設置して、その一方が間欠曝気の曝気開始信
号となると共に他方が間欠曝気の非曝気開始信号とな
り、かつ、これら両タイマーのうち少なくとも非曝気開
始用タイマーの計時開始が透過形光センサーの界面検出
作用によつて行われるように、曝気装置の駆動回路と電
気的に接続してなる間欠曝気の自動的時間制御装置にお
いて、前記汚水処理槽内の水面の昇降に応じて昇降する
フロートに、槽内液を介して所定の間隔により投光面と
受光面が同心状に対向するよう透過形光センサーの感知
部を配設し、かつ、該感知部が槽内水面下における任意
所定の深度に位置するようフロートの浮力を設定し、汚
泥の沈降界面が光センサー感知部の配設位置に達したこ
とによつて生ずる透過光の増大を検出するよう構成せら
れている。The automatic time control device for intermittent aeration according to the present invention is provided with two timers, one of which serves as an aeration start signal for intermittent aeration and the other serves as a non-aeration start signal for intermittent aeration, and both timers. In the automatic time control device for intermittent aeration, which is electrically connected to the drive circuit of the aeration device so that at least the non-aeration start timer is started by the interface detection function of the transmissive optical sensor. The sensing unit of the transmissive optical sensor is arranged on the float that moves up and down according to the elevation of the water surface in the sewage treatment tank so that the light projecting surface and the light receiving surface concentrically face each other at a predetermined interval through the liquid in the tank. Buoyancy of the float is set so that the sensing unit is located at an arbitrary predetermined depth below the water surface in the tank, and the sedimentation interface of sludge reaches the installation position of the optical sensor sensing unit. Transparent It is brought configured to detect an increase of light.
間欠曝気処理は同一の処理槽内で生物処理と沈澱放流が
回分式に行われ、オールデイタイマーにより、汚泥の沈
澱および上澄水の放流を行う休止時間と、間欠曝気処理
を行う処理時間とに別けられる。そして本発明では間欠
曝気処理を終つたときタイマーの信号を入力して計時を
開始する（２個の光センサーを使用する場合は一定の時
間経過後）。In the intermittent aeration process, biological treatment and sediment discharge are performed in a batch process in the same treatment tank.The all-day timer separates the rest time for sedimentation of sludge and discharge of supernatant water and the treatment time for intermittent aeration. To be Then, in the present invention, when the intermittent aeration process is finished, a signal from a timer is input to start timing (after a certain period of time elapses when two optical sensors are used).
一定排水処理時間内に曝気と非曝気を多数回繰り返えし
て汚泥の沈降速度を曝気条件に鋭敏に反映させるために
は、２個の透過形光センサーを用いることが望ましい。In order to repeat the aeration and non-aeration multiple times within a fixed wastewater treatment time to reflect the sedimentation rate of sludge sharply on the aeration conditions, it is desirable to use two transmissive optical sensors.
〔実施例:1〕 第２図〔Ａ〕において、１は汚水処理槽、２は汚水処理
槽１内に設置される曝気装置、３は汚水処理槽１内にお
いて槽内液の流通する間隙ｇを隔てて鉛直状に対向する
よう形成せられた双子形のフロートで、汚水処理槽１内
の水面l1の昇降に応じ昇降ガイド４を沿つて昇降する。
S1およびS2は透過形光センサー、T1は第１の光センサー
S1の界面検出作用により計時を開始するタイマー、T2は
第２の光センサーS2の界面検出作用により計時を開示す
るタイマーである。第３図において、５は光センサーの
感知部であつて、前記間隙ｇの槽内液を介して投光面5a
と受光面5bが所定の間隔により同心状に対向するようフ
ロート３に配設されている。そしてフロート３の内部ま
たは外部に調節用の錘り６を附設して、光センサーS1お
よびS2の感知部５が槽内液の液面下における任意所定の
深度に位置するようフロート３の浮力を設定するのであ
り、第１の光センサーS1の感知部５は比較的浅い水深に
制定せられ、第２の光センサーS2の感知部５は第１の光
センサーS1の感知部５よりも深い適宜な水深に設定せら
れるのである。[Embodiment 1] In FIG. 2 [A], 1 is a sewage treatment tank, 2 is an aerator installed in the sewage treatment tank 1, and 3 is a gap g in the sewage treatment tank 1 through which a liquid in the tank flows. The twin floats are formed to face each other in a vertical manner with a space between them, and ascend / descend along the elevating guide 4 according to the elevating / lowering of the water surface l 1 in the sewage treatment tank 1.
S 1 and S 2 are transmissive photosensors, T 1 is the first photosensor
A timer that starts timing by the interface detection action of S 1 and a timer T 2 that discloses timing by the interface detection action of the second optical sensor S 2 . In FIG. 3, reference numeral 5 denotes a sensing portion of an optical sensor, which is a light projecting surface 5a through the liquid in the tank in the gap g.
And the light receiving surface 5b are arranged on the float 3 so as to concentrically face each other at a predetermined interval. Then, a weight 6 for adjustment is attached to the inside or the outside of the float 3 so that the sensing parts 5 of the optical sensors S 1 and S 2 are located at an arbitrary predetermined depth below the liquid level in the bath. Since the buoyancy is set, the sensing unit 5 of the first optical sensor S 1 is established at a relatively shallow water depth, and the sensing unit 5 of the second optical sensor S 2 is the sensing unit of the first optical sensor S 1 . It can be set to a proper water depth deeper than 5.
２個のタイマーT1,T2間欠曝気の曝気と非曝気の各１回
の合計時間にセツトしておく。沈澱開始後に汚泥の沈降
界面l2が第１の光センサーS1の感知部５を通り過ぎて、
光が透過したとき第１のタイマーT1は計時を始める。汚
泥の沈降界面l2が第２の光センサーS2の感知部５を通り
過ぎて、光が透過したとき第２のタイマーT2は計時を始
める。第１のタイマーT1と第２のタイマーT2との時間差
が即ち、第１のセンサーS1の設定水深と第２の光センサ
ーS2設定水深との間を汚泥が通過する時間であり、汚泥
の沈降性を反映した時間となる。従つて、第１のタイマ
ーT1を曝気開始信号となし、第２のタイマーT2を曝気停
止信号としておけば、曝気と非曝気の時間が汚泥の沈降
速度に依存して変化し、しかも一定処理時間内にこの曝
気・非曝気を交互に反覆して多数回繰返えすことができ
るため、沈降速度の増減に鋭敏に即応した適切な曝気・
非曝気時間を得ることができるのである。Two timers T 1 and T 2 Set to the total time for each of the aeration and non-aeration of intermittent aeration. After the start of sedimentation, the sedimentation interface l 2 of the sludge passes through the sensing section 5 of the first optical sensor S 1 ,
When the light is transmitted, the first timer T 1 starts timing. When the sedimentation interface l 2 of the sludge passes the sensing portion 5 of the second optical sensor S 2 and the light is transmitted, the second timer T 2 starts timing. The time difference between the first timer T 1 and the second timer T 2 is the time for the sludge to pass between the set depth of the first sensor S 1 and the set depth of the second optical sensor S 2 , The time reflects the sludge settling property. Therefore, if the first timer T 1 is used as an aeration start signal and the second timer T 2 is used as an aeration stop signal, the aeration and non-aeration times will change depending on the sedimentation velocity of sludge and will be constant. It is possible to repeat this aeration and non-aeration alternately within the processing time and repeat it many times.
The non-aeration time can be obtained.
即ち、上澄水の放流を行い休止時間が終了して再び間欠
曝気処理を始めるときは、第１のタイマーT1は既に設定
時間を終了しているため始めから計時を開始し、各回の
計時毎に曝気開始信号を発信する。第２のタイマーT2は
計時を中断していたため、再処理の始まるときは中途か
ら計時を続行することになる。これが曝気停止信号すな
わち非曝気開始信号である。第１のタイマーT1と第２の
タイマーT2とは同一時間に設定されているので、T2は次
の休止時間までT1よりも汚泥の沈降時間だけ遅れて信号
を出すことになる。That is, when the supernatant water is discharged and the pause time ends and the intermittent aeration process starts again, the first timer T 1 has already finished the set time, and therefore starts counting from the beginning, and each time counting is started. Send an aeration start signal to. Since the second timer T 2 has stopped the time measurement, the time measurement will be continued from the middle when the reprocessing is started. This is the aeration stop signal, that is, the non-aeration start signal. Since the first timer T 1 and the second timer T 2 are set to the same time, T 2 will give a signal later than T 1 by the sludge settling time until the next rest time.
実験によれば、水量約50水槽内において、第１の光セ
ンサーS1を水深2cmに設定すると共に第２の光センサーS
2を水深10cmに設定した場合、沈澱開始後30分で第１の
光センサーS1が受光し、同65分後に第２の光センサーS2
が受光した。第１のタイマーT1と第２のタイマーT2との
時間差は35分で、曝気と非曝気の合計時間60分で曝気装
置を運転したところ、放流水中のアンモンニア態窒素に
対する硝酸態窒素の比は4.9であつた。引続き同じ条件
で運転したところ、曝気時間は20分から50分の間で変動
した。According to the experiment, the first optical sensor S 1 is set to a water depth of 2 cm and the second optical sensor S 1 is set in the water tank of about 50 water.
When 2 is set to a water depth of 10 cm, the first optical sensor S 1 receives light 30 minutes after the start of precipitation, and the second optical sensor S 2 after 65 minutes.
Received light. The time difference between the first timer T 1 and the second timer T 2 is 35 minutes, and when the aerator was operated for a total of 60 minutes of aeration and non-aeration, the ratio of nitrate nitrogen to ammonium nitrogen in the discharge water was calculated. Was 4.9. When operated under the same conditions, the aeration time varied between 20 and 50 minutes.
〔実施例:2〕 汚泥の初期の沈降性が比較的大きく、時間と沈降深度が
ほぼ比例している場合は、第２図〔Ｂ〕のように第１の
光センサーを省いて沈澱開始信号またはタイマーで一定
時間後に第１のタイマーT1の計時を始めることができ
る。光センサーS2の投光面5aから投光され汚泥が沈降し
て感知部５の設定水深を過ぎると受光面5bにより光が受
光し、この信号が第２のタイマーT2に入力して計時を開
始する。第１のタイマーT1が設定時間を過ぎると両タイ
マーT1,T2は中断される。その後、再び間欠曝気を行う
に当つては実施例:1の場合と同様である。[Example: 2] When the initial settling property of the sludge is relatively large and the time and the settling depth are almost proportional to each other, the first optical sensor is omitted as shown in FIG. Alternatively, the timer can start timing of the first timer T 1 after a certain time. Light is received sludge is projected from the light projecting surface 5a of the optical sensor S 2 passes the setting depth of the sensing unit 5 settled by the light-receiving surface 5b, counting this signal is input to the second timer T 2 To start. When the first timer T 1 exceeds the set time, both timers T 1 and T 2 are interrupted. Thereafter, the intermittent aeration is performed again in the same manner as in Example 1.
実験によれば、水量約40の水槽内において、光センサ
ーS2の感知部５を水深約8cmに設定し、第１のタイマーT
1は沈澱開始前の撹拌信号で計時を始めた。光センサーS
2約20分で受光し、計時を始めた。撹拌を２分間行つた
ため、第１のタイマーT1と第２のタイマーT2との時間差
は22分となつた。非曝気時間48分を加え合計時間70とし
て運転したところ、流水中のアンモンニア態窒素に対す
る硝酸態窒素の比は2.2であつた。引き続き同じ条件で
運転したところ、曝気時間は15分から45分の間で変動し
た。According to the experiment, the sensing unit 5 of the optical sensor S 2 is set to a water depth of about 8 cm in the water tank of about 40 water, and the first timer T
In No. 1, the stirring signal before the start of precipitation started the timing. Light sensor S
2 Received light in about 20 minutes and started timing. Since the stirring was performed for 2 minutes, the time difference between the first timer T 1 and the second timer T 2 was 22 minutes. When operated for a total time of 70 with the addition of 48 minutes of non-aeration, the ratio of nitrate nitrogen to ammonia nitrogen in the running water was 2.2. When operated continuously under the same conditions, the aeration time varied between 15 and 45 minutes.
本発明によれば、特開昭60−172400号公報所載の排水処
理方法を簡潔な装置によつてローコストに実施すること
ができ、しかも曝気の開始毎に汚水処理槽内の水位が増
減していても、その水位の増減変化には全く関係なく汚
泥沈降界面を適確に検出して、汚泥沈降速度の増減に即
応して適切な曝気・非曝気時間による間欠曝気を自動的
に反覆して行わせ得るのであり、回分放流式間欠曝気の
無人管理を可能ならしめ得るとうい利点がある。According to the present invention, the wastewater treatment method disclosed in JP-A-60-172400 can be implemented at low cost with a simple device, and the water level in the sewage treatment tank increases or decreases each time aeration is started. However, the sludge settling interface is accurately detected regardless of the change in the water level, and the intermittent aeration due to the appropriate aeration / non-aeration time is automatically repeated in response to the increase / decrease in the sludge settling speed. Therefore, there is an advantage that unmanned management of batch discharge type intermittent aeration can be performed.
第１図は本発明制御装置により行われる間欠曝気のタイ
ムチヤート、第２図〔Ａ〕〔Ｂ〕は本発明制御装置を施
した汚水処理槽の縦断側面図、第３図は本発明制御装置
における汚泥沈降界面検出用フロートの要部縦断側面
図、第４図は同フロートの平面図、第５図は公知の透過
形光センサーにおける感知部の側面図である。 １……汚水処理槽、２……曝気装置、３……フロート、
５……感知部、5a……投光面、5b……受光面、l1……水
面、l2……汚泥沈降界面、S2……透過形光センサー、T1
……曝気開始用タイマー、T2……非曝気開始用タイマ
ー。FIG. 1 is a time chart of intermittent aeration performed by the control device of the present invention, FIGS. 2A and 2B are vertical side views of a sewage treatment tank to which the control device of the present invention is applied, and FIG. 3 is the control device of the present invention. FIG. 4 is a vertical sectional side view of an essential part of the sludge sedimentation interface detection float, FIG. 4 is a plan view of the float, and FIG. 5 is a side view of a sensing unit in a known transmission type optical sensor. 1 ... sewage treatment tank, 2 ... aeration device, 3 ... float,
5: Sensing part, 5a: Light emitting surface, 5b: Light receiving surface, l 1 ... Water surface, l 2 ... Sludge sedimentation interface, S 2 ... Transmissive optical sensor, T 1
...... Aeration start timer, T 2 …… Non-aeration start timer.
Claims (1)
その一方が間欠曝気の曝気開始信号となると共に他方が
間欠曝気の非曝気開始信号となり、かつ、これら両タイ
マー（T1）（T2）のうち少なくとも非曝気開始用タイマ
ー（T2）の計時開始が透過形光センサー（S2）の界面検
出作用によつて行われるように、曝気装置（２）の駆動
回路と電気的に接続してなる間欠曝気の自動的時間制御
装置ににおいて、前記汚水処理槽（１）内の水面（l1）
の昇降に応じて昇降するフロート（３）に、槽内液を介
して所定の間隔により投光面（5a）と受光面（5b）が同
心状に対向するよう投過形光センサー（S2）の感知部
（５）を配設し、かつ、該感知部（５）が槽内水面
（l1）下における任意所定の深度に位置するようフロー
ト（３）の浮力を設定し、汚泥の沈降界面（l2）が光セ
ンサー感知部（５）の配設位を通過することによつて生
ずる透過光の増大を検出するように構成せられた間欠曝
気の自動的時間制御装置。1. A pair of timers (T 1 ) (T 2 ) are installed,
The other is rendered non-aeration start signal of the intermittent aeration with one of which the aeration start signal of the intermittent aeration and counting of these two timers (T 1) (T 2) at least a non-aeration initiate timer of (T 2) In the automatic time control device for intermittent aeration, which is electrically connected to the drive circuit of the aeration device (2) so that the initiation is performed by the interface detection action of the transmission type optical sensor (S 2 ), Water surface (l 1 ) in the sewage treatment tank ( 1 )
The float type light sensor (S 2 ) is arranged so that the light emitting surface (5a) and the light receiving surface (5b) are concentrically opposed to each other at a predetermined interval through the liquid in the tank, which floats up and down according to the vertical movement of ), And the buoyancy of the float (3) is set so that the sensor (5) is located at an arbitrary predetermined depth below the water surface (l 1 ) in the tank. An automatic time control device for intermittent aeration, configured to detect an increase in transmitted light caused by the sedimentation interface (l 2 ) passing through the arrangement of the optical sensor sensing part (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62031983A JPH07102354B2 (en) | 1987-02-13 | 1987-02-13 | Automatic time control device for intermittent aeration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62031983A JPH07102354B2 (en) | 1987-02-13 | 1987-02-13 | Automatic time control device for intermittent aeration |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63200898A JPS63200898A (en) | 1988-08-19 |
| JPH07102354B2 true JPH07102354B2 (en) | 1995-11-08 |
Family
ID=12346170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62031983A Expired - Fee Related JPH07102354B2 (en) | 1987-02-13 | 1987-02-13 | Automatic time control device for intermittent aeration |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07102354B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004138473A (en) * | 2002-10-17 | 2004-05-13 | Toppan Printing Co Ltd | Liquid component concentration measurement device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06142689A (en) * | 1992-11-02 | 1994-05-24 | Daiki Kk | Purifying device for sewage of intermittent aeration type |
-
1987
- 1987-02-13 JP JP62031983A patent/JPH07102354B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004138473A (en) * | 2002-10-17 | 2004-05-13 | Toppan Printing Co Ltd | Liquid component concentration measurement device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63200898A (en) | 1988-08-19 |
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