JPH0221998A - Method and device for aeration - Google Patents
Method and device for aerationInfo
- Publication number
- JPH0221998A JPH0221998A JP63171472A JP17147288A JPH0221998A JP H0221998 A JPH0221998 A JP H0221998A JP 63171472 A JP63171472 A JP 63171472A JP 17147288 A JP17147288 A JP 17147288A JP H0221998 A JPH0221998 A JP H0221998A
- Authority
- JP
- Japan
- Prior art keywords
- air
- capacity
- blower
- capacity blower
- small
- 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
- 238000005273 aeration Methods 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 238000001514 detection method Methods 0.000 claims abstract description 9
- 239000010865 sewage Substances 0.000 description 4
- 238000007664 blowing Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 102000004190 Enzymes Human genes 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000010842 industrial 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)
- Feedback Control In General (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は下水処理場等の処理場で活性汚泥処理を行うた
めに使用される曝気装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an aeration device used for activated sludge treatment in a treatment plant such as a sewage treatment plant.
（従来の技術）
例えば、下水処理用の曝気装置は、第３図に示されるよ
うに曝気槽（１）の内部に多数の散気装置（２）を設置
しておき、各散気装置（２）を枝管（３）を介して空気
供給ライン（４）に接続して圧縮空気を槽内に吹込むよ
うにしたものである。ところが現在、下水処理場の送風
機動力ば場全体の動力の４０〜５０％にも達しており、
曝気装置の送風機動力を低減させることば省エネルギー
の面で非常に重要なことである。一方、下水処理場の原
水水量や原水水質は雨水の流入の有無や工場排水の流入
量の変化等の要因によって大幅に変化するものであり、
例えば公称処理量が１０万ｍ３／日の処理場の場合には
通常は８万ｍ３７日、時間最大処理量は１１万ｍ３／日
程度となっている。このためにＢＯＤ負荷に比例して必
要となる曝気用の空気量も大きく変動することとなり、
これに対応するために空気供給ライン（４）には例えば
３台のブロア（５）を配置しておき、１台は予備機とし
て通常は使用せず常時は２台のブロア（５）により散気
装置（２）に供給するようになっている。しかし一般に
ブロアの吐出空気量は定格容量から太き（絞ることは好
ましくなく、出）ｊを６０％以下にまで低下させるとサ
ージング現象が生して共鳴により激しい振動を生じ故障
するおそれがあるので、定格容量の６０〜１（１０％の
範囲で運転しなげればならない。この結果、３台のブロ
ア（５）を利用して制御できる空気供給ライン（４）へ
の空気量は第４図のようになり、例えば１台目のブロア
（５）の出力を１（１０％としてもなお空気量が不足す
る場合に２台目のブロア（５）を出力６０％として起動
すると、合計の空気量は１（１０％から１６０％に急増
することとなる。このために必要空気量に対してかなり
の過不足が生ずることが避けられず、過剰の圧縮空気を
大気中へ逃がしたり空気供給量を定格容量よりかなり低
い範囲としたりするためのエネルギーロスの発生、ある
いは散気量の不足により活性汚泥処理の効率が低下する
等のトラブルを生じていた。(Prior Art) For example, in an aeration system for sewage treatment, a large number of air diffusers (2) are installed inside an aeration tank (1), and each air diffuser ( 2) is connected to an air supply line (4) via a branch pipe (3) to blow compressed air into the tank. However, currently, the power source for blowers at sewage treatment plants accounts for 40 to 50% of the entire power source.
Reducing the power of the blower in the aeration system is very important in terms of energy conservation. On the other hand, the amount and quality of raw water at sewage treatment plants can vary significantly depending on factors such as the presence or absence of rainwater inflow and changes in the amount of industrial wastewater inflow.
For example, in the case of a treatment plant with a nominal throughput of 100,000 m3/day, the normal throughput is 80,000 m37 days, and the maximum hourly throughput is about 110,000 m3/day. For this reason, the amount of air required for aeration will vary greatly in proportion to the BOD load.
In order to cope with this, for example, three blowers (5) are arranged in the air supply line (4), one of which is not normally used as a standby machine, and is normally dissipated by two blowers (5). The air is supplied to the air device (2). However, in general, the amount of air discharged from a blower is larger than its rated capacity (it is not recommended to throttle it; if the output) is reduced to 60% or less, a surging phenomenon will occur, which may cause severe vibration due to resonance and cause a failure. , it must be operated within a range of 60 to 10% of the rated capacity.As a result, the amount of air to the air supply line (4) that can be controlled using three blowers (5) is as shown in Figure 4. For example, if the air volume is still insufficient even if the output of the first blower (5) is set to 1 (10%), if the second blower (5) is started with an output of 60%, the total air The amount will rapidly increase from 1 (10% to 160%).For this reason, it is inevitable that there will be a considerable excess or deficiency in the required air amount, and the excess compressed air will be released into the atmosphere or the air supply amount will be reduced. This has caused problems such as energy loss due to the fact that the capacity is much lower than the rated capacity, and the efficiency of activated sludge treatment is reduced due to insufficient aeration.
（発明が解決しようとする課題）
本発明は上記したような従来の問題点を解決して、原水
水量や原水水質の変動に伴って生ずる必要空気量の変動
により的確に対応し、圧縮空気を適正な空気量で散気す
ることができる曝気装置および、その装置を用いた曝気
方法の開発を目的として完成されたものである。(Problems to be Solved by the Invention) The present invention solves the above-mentioned conventional problems, more accurately responds to changes in the amount of air required due to changes in the amount and quality of raw water, and makes it possible to use compressed air. It was completed with the aim of developing an aeration device that can diffuse air with an appropriate amount of air, and an aeration method using the device.
（課題を解決するための手段）
上記の課題を解決するための第１の発明は、曝気槽の内
部に設置された各散気板を第１の空気供給ラインとこれ
とは独立した第２の空気供給ラインとにそれぞれ接続す
るとともに、第１の空気供給ラインには大容量ブロアを
複数台配置し、また第２の空気供給ラインには上記の大
容量ブロアよりも定格容量の小さい小容量ブロアを複数
台配置し、更に曝気槽内のＤ Ｏ濃度等の検知信号に基
づいて必要空気量を演算し大容量ブロアと小容量フロア
それぞれの空気供給量を制御する空気量演算制御器を設
けたことを特徴とするものである。また第２の発明は、
曝気槽内のＤＯ濃度等の検知信号に基づいて、曝気槽内
に供給される原水を処理するのに必要な必要空気量を演
算し、該必要空気量を各散気装置に接続された大容量ブ
ロアおよび小容量ブロアから曝気槽内に設けられた散気
装置に供給する際に、大容量ブロアと小容量ブロアの空
気供給エネルギーが最小となるように大容量ブロアと小
容量ブロアの空気供給量を演算し各ブロアを制御するこ
とを特徴とするものであり、更に第３の発明は、曝気槽
内のＤＯ濃度等の検知信号に基づいて、曝気槽内に供給
される原水を処理するのに必要な必要空気量を演算し、
該必要空気量を各散気装置に接続された大容量ブロアお
よび小容量ブロアから曝気槽内に設けられた散気装置に
供給する際に、大容量ブロアと小容量ブロアの空気供給
エネルギーが最小となるように大容量ブロアと小容量ブ
ロアの空気供給量を演算しこれらのブロアを制御すると
ともに、大容量ブロアから空気を供給する散気装置と小
容量ブロアから空気を供給する散気装置とを区分して空
気の供給を制御することを特徴とするものである。(Means for Solving the Problem) A first invention for solving the above problem is to connect each diffuser plate installed inside the aeration tank to a first air supply line and a second air supply line independent of this. A plurality of large-capacity blowers are installed in the first air supply line, and a small-capacity blower with a smaller rated capacity than the large-capacity blower is installed in the second air supply line. Multiple blowers are installed, and an air volume calculation controller is installed that calculates the required air volume based on detection signals such as the DO concentration in the aeration tank and controls the air supply volume of the large capacity blower and the small volume floor. It is characterized by: Moreover, the second invention is
Based on detection signals such as the DO concentration in the aeration tank, the required air amount required to treat the raw water supplied to the aeration tank is calculated, and the required air amount is calculated from the large air diffuser connected to each diffuser. When supplying air from the large capacity blower and small capacity blower to the aeration device installed in the aeration tank, the air supply from the large capacity blower and small capacity blower is The third invention is characterized in that the amount is calculated and each blower is controlled.Furthermore, the third invention processes the raw water supplied into the aeration tank based on a detection signal such as the DO concentration in the aeration tank. Calculate the amount of air required for
When supplying the required amount of air from the large-capacity blower and small-capacity blower connected to each diffuser to the diffuser installed in the aeration tank, the air supply energy of the large-capacity blower and small-capacity blower is the minimum. In addition to calculating the air supply amount of the large-capacity blower and small-capacity blower and controlling these blowers, the air diffuser supplies air from the large-capacity blower and the small-capacity blower. This system is characterized by controlling the supply of air by dividing the air into sections.
（実施例）
次に本発明を図示の実施例によって更に詳細に説明する
と、第１図において（１）は曝気槽、（２）はその内部
に設置された多数の散気装置である。（６）は散気用の
圧縮空気を各散気装置（２）へ供給するための第１の空
気供給ライン、（７）はこれとは独立に設けられた第２
の空気供給ラインであって、各散気装置（２）は枝管（
３ａ）、（３ｂ）及びバルブ（８ａ）、（８ｂ）を介し
てこれらの第１及び第２の空気供給ライン（６）、（７
）にそれぞれ接続されている。第１の空気供給ライン（
６）には空気源として大容量ブロア（９）が複数台配置
されており、必要に応して適当台数が運転される。また
第２の空気供給ライン（７）にはこれよりも定格容量の
小さい小容量ブロア（１０）（本実施例においては約半
分の容量）が複数台配置されている。(Example) Next, the present invention will be explained in more detail with reference to an illustrated example. In FIG. 1, (1) is an aeration tank, and (2) is a large number of air diffusers installed inside the aeration tank. (6) is a first air supply line for supplying compressed air for aeration to each diffuser (2), and (7) is a second air supply line provided independently from this.
air supply line, each air diffuser (2) is connected to a branch pipe (
3a), (3b) and these first and second air supply lines (6), (7) via valves (8a), (8b).
) are connected to each other. The first air supply line (
6) is equipped with a plurality of large capacity blowers (9) as air sources, and an appropriate number of them are operated as needed. Further, a plurality of small capacity blowers (10) having a smaller rated capacity than this (approximately half the capacity in this embodiment) are arranged in the second air supply line (7).
０υは空気量演算制御器であり、曝気槽内のＤＯ濃度を
通常１〜３■／Ｉ２に維持するために設けられた検知器
０２）によって得られるＤ Ｏ？ｉ度等の検知信号、原
水水質の指標であるＢＯＤ濃度と原水水量の積により算
出されるＢＯＤ負荷量、原水水量等の検知信号に基づい
て、曝気槽内に供給される原水を処理するのに必要な必
要空気量を演算し、これに基づいて大容量ブロア（９）
、小容量ブロア（１０）、各バルブ（８ａ）、（８ｂ）
等を制御することができるものである。また散気装置（
２）の表面に付着した汚れの状態や目詰まり状態に応じ
て、−時的に所定時間大量の空気を供給する制御を行う
こともできる。0υ is an air amount calculation controller, and the DO? obtained by a detector 02) provided to maintain the DO concentration in the aeration tank at 1 to 3 /I2 is normally determined. The raw water supplied to the aeration tank is processed based on detection signals such as degree i, BOD load calculated from the product of BOD concentration and raw water volume, which are indicators of raw water quality, and raw water volume. Calculate the amount of air required for the
, small capacity blower (10), each valve (8a), (8b)
etc. can be controlled. Also, air diffuser (
Depending on the state of dirt adhering to the surface of 2) or the state of clogging, it is also possible to perform control to occasionally supply a large amount of air for a predetermined period of time.
０３）は増圧器であり、第１、第２の空気供給ライン（
６）、（７）や枝管（３ａ）、（３ｂ）等の空気圧力を
検知し、必要に応じて空気圧力を増圧制御するものであ
る。03) is a pressure intensifier, and the first and second air supply lines (
6), (7), branch pipes (3a), (3b), etc., and increases the air pressure as necessary.
（作 用）
このように構成された本発明の曝気装置は、曝気槽（１
）内の水量、ＢＯＤ、槽内のＤＯ量等に応して各散気装
置（２）への空気量を変化させつつ曝気を行うものであ
り、例えば第２図に示されるように必要な送気量が少な
いときには大容量ブロア（９）を１台のみ運転し、必要
な送気量が増加するにつれて大容量ブロア（９）１台プ
ラス小容量プロア（１０）１台、大容量ブロア（９）２
台、大容量ブロア（９）２台プラス小容量ブロア０Ｏ）
１台等のように次第に運転するブロアの台数を増加させ
る。また第２図に示すように、例えば大容量ブロア（９
）１台プラス小容量ブロア（１０）１台を運転する場合
には、大容量ブロア（９）は最も効率の良い定格吐出量
で運転し、小容量ブロア（１０）の出力を６０〜１（１
０％の範囲で変化させつつ空気量を調節する。これによ
って大容量ブロア（９）と小容量ブロアθ０）とが、必
要空気量を供給するために必要とする空気供給エネルギ
ーの和を最小にすることができる。このような各ブロア
の制御は空気量演算制御器０υによって行うことができ
る。(Function) The aeration device of the present invention configured as described above has an aeration tank (1
), BOD, DO amount in the tank, etc., aeration is performed while changing the amount of air to each diffuser (2), for example, as shown in Figure 2. When the air supply amount is low, only one large capacity blower (9) is operated, and as the required air supply amount increases, one large capacity blower (9) plus one small capacity blower (10), and one large capacity blower (10) are operated. 9)2
2 large capacity blowers (9) plus small capacity blowers 0O)
The number of blowers to be operated is gradually increased, such as 1 unit, etc. In addition, as shown in Figure 2, for example, a large capacity blower (9
) When operating one small-capacity blower (10) plus one small-capacity blower (10), the large-capacity blower (9) is operated at the most efficient rated discharge amount, and the output of the small-capacity blower (10) is increased from 60 to 1 ( 1
Adjust the amount of air while changing it within the range of 0%. Thereby, the sum of the air supply energy required by the large capacity blower (9) and the small capacity blower θ0) to supply the required amount of air can be minimized. Such control of each blower can be performed by an air amount calculation controller 0υ.
なお、同一の散気装置に対して、大容量ブロア（９）と
小容量ブロア（１０）の両方から空気が供給される場合
には、両者の空気供給圧力は路間しレベルに維持するこ
とが必要である。しかし空気量演算制御器αＤからの制
御信号によってバルブ（８ａ）、（８ｂ）をオンオフす
ることにより、大容量ブロア（９）から空気を供給する
散気装置と小容量ブロア（１０）から空気を供給する散
気装置とに区分して空気の供給を制御することもでき、
この場合にはこの必要はなくなる。In addition, when air is supplied from both a large capacity blower (9) and a small capacity blower (10) to the same air diffuser, the air supply pressure of both should be maintained at the same level. is necessary. However, by turning on and off the valves (8a) and (8b) according to the control signal from the air amount calculation controller αD, air is supplied from the diffuser that supplies air from the large capacity blower (9) and from the small capacity blower (10). It is also possible to control the supply of air by dividing it into a diffuser and a diffuser.
In this case, this is no longer necessary.
このように本発明によれば大容量ブロア（９）と小容量
ブロア（１０１とを適宜組合せて必要空気量の変化に対
応できるようにしたので、第２図と第４図とを対比して
も明らかなように従来よりも空気量の増減をなだらかに
行わせることができ、過剰の圧縮空気の放出によるエネ
ルギーロスや、散気量不足を減少させることができる。In this way, according to the present invention, the large capacity blower (9) and the small capacity blower (101) can be appropriately combined to cope with changes in the amount of air required. As is clear, the amount of air can be increased and decreased more gently than in the past, and energy loss due to release of excess compressed air and insufficient air diffusion can be reduced.
また本発明においては、−時的に定常時より多数のブロ
アを稼働させて必要空気量以上の大量の圧縮空気を各散
気装置（２）に供給することが出来るため、散気装置の
表面に付着した汚れの状態や目詰まり状態に応じて一時
的に所定時間大量の圧縮空気を供給するにより、散気装
置（２）の表面に付着した汚れを吹き飛ばすこともでき
る。このような汚れ除去用のブローは例えば散気板を用
いた散気装置においてはブロー回数として、２〜３週間
に１回程度の周期で行うことが好ましく、１回のブロー
時間は３０分間程度で十分である。この場合のブロー空
気量は３０ｃｍＸ３０ｃｍの寸法の散気板１孜当たり、
１２０１／分程度と、通常運転時の１．５〜２倍程度と
する。一般に散気板の圧損は毎年５０〜８０１１Ａｑず
つ増加し、１０年間で８（１０ｖ＋Ａｑに達すると新品
と交換するのであるが、上記のように２〜３週間に１度
ずつブローを行えば毎年の圧損増加を半減させることが
可能となり、しかも散気装置（２）を槽内に設置したま
まで汚れの除去や目詰まりの防止が可能な利点がある。In addition, in the present invention, - Since it is possible to temporarily operate a larger number of blowers than in a steady state and supply a large amount of compressed air exceeding the required air amount to each diffuser (2), the surface of the diffuser It is also possible to blow away dirt adhering to the surface of the air diffuser (2) by temporarily supplying a large amount of compressed air for a predetermined period of time depending on the state of dirt adhering to the air diffuser (2) or the state of clogging. For example, in an air diffuser using an air diffuser plate, such blowing for removing dirt is preferably performed at a frequency of about once every 2 to 3 weeks, and the duration of each blow is about 30 minutes. is sufficient. In this case, the amount of blow air per diffuser plate with dimensions of 30 cm x 30 cm,
The speed is approximately 1201/min, which is approximately 1.5 to 2 times that of normal operation. Generally, the pressure loss of the air diffuser increases by 50 to 8011 Aq every year, and when it reaches 8 (10 V + Aq) in 10 years, it is replaced with a new one, but if you blow once every 2 to 3 weeks as described above, It is possible to reduce the increase in pressure loss by half, and there is an advantage that dirt can be removed and clogging can be prevented while the air diffuser (2) is installed in the tank.
なお、通常の散気装置においては、散気装置の受ける水
圧に対して若干高い圧力（例えば＋１（１００〜＋１５
（１０ｍｉＡｑ）で散気しているが、供給空気量を増加
させると空気圧力が低下するため、差圧が小さい場合充
分な散気が出来なくなる恐れがある。In addition, in a normal air diffuser, a pressure that is slightly higher than the water pressure that the air diffuser receives (for example, +1 (100 to +15
(10 miAq), but if the amount of supplied air is increased, the air pressure will decrease, so if the differential pressure is small, there is a risk that sufficient aeration will not be possible.
この様な場合や原水水量の変動に伴い曝気槽の水深が深
くなった場合等には、第１及び第２の空気供給ラインや
枝管（３ａ）や（３ｂ）に増圧器α３）を設けて、必要
充分な散気が出来るように増圧してやることが好ましい
。In such cases, or when the water depth of the aeration tank becomes deeper due to fluctuations in the amount of raw water, install a pressure booster α3) on the first and second air supply lines and branch pipes (3a) and (3b). It is preferable to increase the pressure so that necessary and sufficient aeration can be achieved.
なお、散気装置（２）の表面に付着した汚れを除去する
ため一時的に所定時間大量の圧縮空気を各散気装置（２
）に同時に供給しようとすると設備規模が大となりエネ
ルギーロスが大となるので、全必要空気量を維持しつつ
ブロック毎に順番に定常的に供給する空気量の１．５〜
２倍の空気供給を行えば、より小規模な設備によりエネ
ルギーロスを少な（しつつ、散気と汚れ除去とを行うこ
とが出来て好ましい。この場合には前述のように散気装
置（２）の一部を大容量ブロア（９）に接続し、他の散
気装置（２）を小容量ブロア（１０）に接続する方法を
採ることが好ましい。In addition, in order to remove dirt adhering to the surface of the air diffuser (2), a large amount of compressed air is temporarily applied to each air diffuser (2) for a predetermined period of time.
) at the same time, the scale of the equipment will be large and the energy loss will be large. Therefore, while maintaining the total required air amount, it is necessary to supply 1.5~
If the air supply is doubled, it is preferable to use smaller-scale equipment to reduce energy loss (while still being able to diffuse air and remove dirt).In this case, as described above, the air diffuser ) is preferably connected to a large-capacity blower (9), and the other diffuser (2) is connected to a small-capacity blower (10).
また、散気装置の圧損を測定し、その測定値が所定値以
上に達した際に、ブローを行うようにすれば、より効果
的な汚れの除去が可能となるが、定期的に汚れ除去のた
めのブローを行うようにすることもできる。In addition, it is possible to remove dirt more effectively by measuring the pressure drop of the air diffuser and blowing when the measured value reaches a predetermined value. It is also possible to perform blowing for this purpose.
なお、本実施例においては、空気を用いた曝気処理につ
いて説明したが、酵素等その他の気体による曝気処理に
も適用できることは言うまでもない。また、処理場の状
況によっては、第１の空気供給ラインと独立した定格容
量を異にする第２の空気供給ラインは複数ライン設けて
もよ（、例えばその一方に中容量ブロアを設け、他方に
小容量ブロアを設けるようにすれば、より厳密な制御を
行うことができる。In this example, the aeration process using air has been described, but it goes without saying that the aeration process can also be applied to aeration processes using other gases such as enzymes. Also, depending on the situation of the treatment plant, a plurality of second air supply lines with different rated capacities may be provided, which are independent from the first air supply line (for example, one of them is equipped with a medium capacity blower, and the other is If a small-capacity blower is installed in the air conditioner, more precise control can be achieved.
（発明の効果）
本発明は以上に説明したとおり、処理水量の変動に伴っ
て生ずる必要送気量の変動により的確に対応し、適正な
送気量で曝気を行うことができるとともに省エネルギー
を図ることができるものであるから、従来の問題点を解
決した曝気装置及び曝気方法として、産業の発展に寄与
するところは極めて大である。(Effects of the Invention) As explained above, the present invention can more accurately respond to fluctuations in the required air supply amount that occur with changes in the amount of treated water, perform aeration with an appropriate air supply amount, and save energy. Therefore, it will greatly contribute to the development of industry as an aeration device and aeration method that solves conventional problems.
第１図は本発明の実施例を示す配管図、第２図はその供
給空気量の変化を示すグラフ、第３図は従来例を示す配
管図、第４図はその供給空気量の変化を示すグラフであ
る。
容量ブロア、（１０）：小容量ブロア、θυ：空気量演
算制御器。Fig. 1 is a piping diagram showing an embodiment of the present invention, Fig. 2 is a graph showing changes in the amount of air supplied, Fig. 3 is a piping diagram showing the conventional example, and Fig. 4 is a graph showing changes in the amount of air supplied. This is a graph showing. Capacity blower, (10): Small capacity blower, θυ: Air amount calculation controller.
Claims (1)
を第１の空気供給ライン（６）とこれとは独立した第２
の空気供給ライン（７）とにそれぞれ接続するとともに
、第１の空気供給ライン（６）には大容量ブロア（９）
を複数台配置し、また第２の空気供給ライン（７）には
上記の大容量ブロア（９）よりも定格容量の小さい小容
量ブロア（１０）を複数台配置し、更に曝気槽（１）内
のＤＯ濃度等の検知信号に基づいて必要空気量を演算し
大容量ブロア（９）と小容量ブロア（１０）それぞれの
空気供給量を制御する空気量演算制御器（１１）を設け
たことを特徴とする曝気装置。 ２、曝気槽内のＤＯ濃度等の検知信号に基づいて、曝気
槽内に供給される原水を処理するのに必要な必要空気量
を演算し、該必要空気量を各散気装置に接続された大容
量ブロアおよび小容量ブロアから曝気槽内に設けられた
散気装置に供給する際に、大容量ブロアと小容量ブロア
の空気供給エネルギーが最小となるように大容量ブロア
と小容量ブロアの空気供給量を演算し各ブロアを制御す
ることを特徴とする曝気方法。 ３、曝気槽内のＤＯ濃度等の検知信号に基づいて、曝気
槽内に供給される原水を処理するのに必要な必要空気量
を演算し、該必要空気量を各散気装置に接続された大容
量ブロアおよび小容量ブロアから曝気槽内に設けられた
散気装置に供給する際に、大容量ブロアと小容量ブロア
の空気供給エネルギーが最小となるように大容量ブロア
と小容量ブロアの空気供給量を演算しこれらのブロアを
制御するとともに、大容量ブロアから空気を供給する散
気装置と小容量ブロアから空気を供給する散気装置とを
区分して空気の供給を制御することを特徴とする曝気方
法。[Claims] 1. Each air diffuser (2) installed inside the aeration tank (1)
a first air supply line (6) and an independent second air supply line (6).
A large capacity blower (9) is connected to the first air supply line (6).
A plurality of small capacity blowers (10) having a smaller rated capacity than the above-mentioned large capacity blower (9) are arranged in the second air supply line (7), and an aeration tank (1) is arranged. An air amount calculation controller (11) is provided that calculates the required air amount based on detection signals such as the DO concentration in the air and controls the air supply amount of each of the large capacity blower (9) and the small capacity blower (10). An aeration device featuring: 2. Based on the detection signal such as the DO concentration in the aeration tank, calculate the required amount of air necessary to treat the raw water supplied to the aeration tank, and calculate the required air amount by connecting the air diffuser to each diffuser. When supplying air from the large-capacity blower and small-capacity blower to the aeration device installed in the aeration tank, the large-capacity blower and small-capacity blower are designed to minimize the air supply energy of the large-capacity blower and small-capacity blower. An aeration method characterized by calculating the air supply amount and controlling each blower. 3. Based on the detection signal such as the DO concentration in the aeration tank, calculate the required air amount necessary to treat the raw water supplied to the aeration tank, and calculate the required air amount by connecting the air diffuser to each air diffuser. When supplying air from the large-capacity blower and small-capacity blower to the aeration device installed in the aeration tank, the large-capacity blower and small-capacity blower are designed to minimize the air supply energy of the large-capacity blower and small-capacity blower. In addition to calculating the air supply amount and controlling these blowers, the air supply is controlled by dividing the air diffuser into an air diffuser that supplies air from a large capacity blower and an air diffuser that supplies air from a small capacity blower. Characteristic aeration method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63171472A JPH0221998A (en) | 1988-07-08 | 1988-07-08 | Method and device for aeration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63171472A JPH0221998A (en) | 1988-07-08 | 1988-07-08 | Method and device for aeration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0221998A true JPH0221998A (en) | 1990-01-24 |
Family
ID=15923738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63171472A Pending JPH0221998A (en) | 1988-07-08 | 1988-07-08 | Method and device for aeration |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0221998A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0594095U (en) * | 1992-05-29 | 1993-12-21 | 川崎重工業株式会社 | Hydrofoil rudder |
| US5583945A (en) * | 1993-04-07 | 1996-12-10 | Minebea Co., Ltd. | Speaker with a molded plastic frame including a positioning projection, and a method for manufacturing the same |
| JP2006263585A (en) * | 2005-03-24 | 2006-10-05 | Ngk Insulators Ltd | Method for preventing clogging of air diffuser and method for operating air diffuser using this method |
| JP2007144277A (en) * | 2005-11-25 | 2007-06-14 | Toshiba Corp | Aeration control system |
| JP2015174019A (en) * | 2014-03-14 | 2015-10-05 | 神鋼環境メンテナンス株式会社 | Operation method of organic waste water treatment facility |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58146493A (en) * | 1982-02-25 | 1983-09-01 | Toshiba Corp | Control method of operation of blower |
-
1988
- 1988-07-08 JP JP63171472A patent/JPH0221998A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58146493A (en) * | 1982-02-25 | 1983-09-01 | Toshiba Corp | Control method of operation of blower |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0594095U (en) * | 1992-05-29 | 1993-12-21 | 川崎重工業株式会社 | Hydrofoil rudder |
| US5583945A (en) * | 1993-04-07 | 1996-12-10 | Minebea Co., Ltd. | Speaker with a molded plastic frame including a positioning projection, and a method for manufacturing the same |
| JP2006263585A (en) * | 2005-03-24 | 2006-10-05 | Ngk Insulators Ltd | Method for preventing clogging of air diffuser and method for operating air diffuser using this method |
| JP2007144277A (en) * | 2005-11-25 | 2007-06-14 | Toshiba Corp | Aeration control system |
| JP2015174019A (en) * | 2014-03-14 | 2015-10-05 | 神鋼環境メンテナンス株式会社 | Operation method of organic waste water treatment facility |
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