JPS5834091A - Water purifier using activated sludge - Google Patents
Water purifier using activated sludgeInfo
- Publication number
- JPS5834091A JPS5834091A JP56132724A JP13272481A JPS5834091A JP S5834091 A JPS5834091 A JP S5834091A JP 56132724 A JP56132724 A JP 56132724A JP 13272481 A JP13272481 A JP 13272481A JP S5834091 A JPS5834091 A JP S5834091A
- Authority
- JP
- Japan
- Prior art keywords
- amount
- aeration
- sludge
- controlling
- mixed liquid
- 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)
Abstract
Description
【発明の詳細な説明】
本発明は活性汚泥水処理装置に係り、特に、曝気に要す
る消費電力を低減するようにした活性汚泥水処理装置に
関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an activated sludge water treatment device, and particularly to an activated sludge water treatment device that reduces power consumption required for aeration.
第１図に従来の活性汚泥水処理装置のブロック図を示す
。FIG. 1 shows a block diagram of a conventional activated sludge water treatment device.
第１図において、汚水は汚水流入管６から曝気槽１に導
入される。曝気槽ｌでは沈殿池２より返送汚泥ポンプ３
によって返送された活性汚泥の微生物と汚水とが混合さ
れる。ブロワ５による曝気によって酸素供給が行なわれ
、曝気槽ｌを流下する過程で汚水中の有機汚染質は活性
汚泥に摂取・分解され沈殿池２へ流入する。曝気風量は
風量調節弁１２を介して曝気槽に供給される。In FIG. 1, wastewater is introduced into an aeration tank 1 from a wastewater inflow pipe 6. In the aeration tank 1, a return sludge pump 3 is sent from the settling tank 2.
The microorganisms in the activated sludge returned by the sludge are mixed with wastewater. Oxygen is supplied by aeration by the blower 5, and organic pollutants in the sewage are absorbed and decomposed by the activated sludge while flowing down the aeration tank 1, and flow into the settling tank 2. The aeration air volume is supplied to the aeration tank via the air volume control valve 12.
沈殿池２においては、活性汚泥と処理水とがＩＥ力沈降
によって固液分−離され、上澄液は処理水として、処理
水雷８を通じて放流される。また、沈降汚泥の一部は、
余剰汚泥ポ／ブ４により余情汚泥管１０を通じて引き抜
かれるが、大部分の汚泥は返送汚泥ポンプ３によって、
返送汚泥管９を通じて曝気槽１に返送される。In the settling tank 2, activated sludge and treated water are separated into solid and liquid by IE force sedimentation, and the supernatant liquid is discharged as treated water through a treated torpedo 8. In addition, some of the settled sludge is
The excess sludge is drawn out through the surplus sludge pipe 10 by the surplus sludge pump 4, but most of the sludge is removed by the return sludge pump 3.
The sludge is returned to the aeration tank 1 through the return sludge pipe 9.
ところで、曝気風量は曝気槽１の溶存酸素濃度により制
御し、返送汚泥量は流入汚水量または、曝気槽のＭＬＳ
Ｓ（混合汚泥濃度）によって制御している。By the way, the aeration air volume is controlled by the dissolved oxygen concentration in the aeration tank 1, and the return sludge volume is determined by the inflow sewage volume or the MLS of the aeration tank.
It is controlled by S (mixed sludge concentration).
しかるに、かかる制御では次に述べる様な欠点がともな
う。However, such control has the following drawbacks.
通常の処理場では夜間に流入汚水前が急激に少なくなる
。従来装置ではＲ，ｔが急激に減るにもかかわらず、プ
ロワ５の電力量が、それに応じて減ることはない。これ
は、曝気槽」の水位が変わらない為に、常にそれに応じ
た圧力の空気量を送らねばならない為である。その上、
曝気風量を変えない為に、水量の少ない夜間には過曝気
となる危険がるる。また、ＤＯ（溶存鍍素濃度）制御を
行なっていても、大幅な曝気風量の低減には役立ってい
ない。実際のデータでは、ＤＯ制御をかける前と後とで
は、数％程の低減が報告されているのが実状である。In a normal treatment plant, the amount of inflowing sewage decreases rapidly at night. In the conventional device, even though R and t decrease rapidly, the electric power of the blower 5 does not decrease accordingly. This is because the water level in the aeration tank does not change, so it is necessary to constantly send air at a pressure corresponding to the water level. On top of that,
Since the aeration air volume does not change, there is a risk of over-aeration at night when the water volume is low. Further, even if DO (dissolved chlorine concentration) is controlled, it does not help to significantly reduce the amount of aeration air. In actual data, it is reported that there is a reduction of several percent between before and after applying DO control.
したがうて、本発明の目的は上記点を改善した活性汚泥
水処理装置を提供することにある。Therefore, an object of the present invention is to provide an activated sludge water treatment apparatus that improves the above points.
本発明の特徴は、流入汚水量の変化に応じて曝気槽の混
合液水位を変化させ、この混合液水位に応じて曝気風量
を調節することによって、過曝気を防止すると共にプロ
ワ−の消費電力を低減するようにしたものである。The present invention is characterized by changing the water level of the mixed liquid in the aeration tank according to changes in the amount of inflowing sewage, and adjusting the aeration air volume according to the water level of the mixed liquid, thereby preventing overaeration and reducing the power consumption of the blower. It is designed to reduce the
第２図に本発明の一実施例を示す。FIG. 2 shows an embodiment of the present invention.
第２図において第１図と異なるのは曝気槽水位計１５、
制御装置１４、制御弁１３を設けられていることである
。なお、沈殿池２は曝気槽１よりも低い位置に設けられ
ており、曝気槽ｌから制御弁１３を通して自然流下出来
るようになっている。What is different in Fig. 2 from Fig. 1 is the aeration tank water level gauge 15;
A control device 14 and a control valve 13 are provided. The sedimentation tank 2 is provided at a lower position than the aeration tank 1, so that water can naturally flow down from the aeration tank 1 through the control valve 13.
制御弁１３は流入汚水量の急激な変化に管路抵抗をＩ与
えたり、１暴気槽内の滞留時間を一定にしたり、また、
曝気槽がオーバフローしないように制御する。必要に応
じてバイパス管１６を用意する。The control valve 13 provides pipe resistance to rapid changes in the amount of inflowing sewage, keeps the residence time in one atomization tank constant, and
Control the aeration tank so that it does not overflow. A bypass pipe 16 is prepared if necessary.
この構成において、流入流量が減少してくると、曝気槽
１から沈殿池２に流入する混合液流量を変化させずに、
曝気槽１の水位を下げる。曝気槽１の水位が下がるにつ
れて、制御装置１４にょシ、水深に応じた吐出圧となる
ように、また、曝気槽１の滞留時間が一定となるように
制御される。具体的にはプロワ５の吐出圧と空気量、及
び返送汚泥ポンプ３による返送汚泥量の制御を行なう。In this configuration, when the inflow flow rate decreases, without changing the flow rate of the mixed liquid flowing into the settling tank 2 from the aeration tank 1,
Lower the water level in aeration tank 1. As the water level in the aeration tank 1 decreases, the control device 14 controls the discharge pressure in accordance with the water depth and the residence time in the aeration tank 1 to be constant. Specifically, the discharge pressure and air amount of the blower 5 and the amount of return sludge by the return sludge pump 3 are controlled.
その結果、プロワ５の能力は流入水量に応じて下げるこ
とが出来、消費電力の低減可能となる。As a result, the capacity of the blower 5 can be lowered according to the amount of inflow water, and power consumption can be reduced.
−例として、プロワを数台設置する場合には、大容瀘と
低容量のものを組み合せ、曝気風量の減少に合わせて、
小容量に切り換え、消費電力を低減することが考えられ
る。- For example, when installing several blowers, combine a large-capacity blower with a low-capacity blower to match the decrease in aeration air volume.
It is possible to reduce power consumption by switching to a smaller capacity.
このように、本発明により、曝気槽１の水位を変えるこ
とで、プロワ５の電力量低減が可能となる。As described above, according to the present invention, by changing the water level of the aeration tank 1, it is possible to reduce the power consumption of the blower 5.
曝気槽ｌのＤｏ制御を行なう場合にはＤＯ制制御フレー
管加えることによりＤＯ制御も可能である。When performing Do control of the aeration tank 1, DO control is also possible by adding a DO control control flare pipe.
−万、流入汚水量に応じて返送汚泥量を変化させて、流
入ｆｊｆｆ、量と返送汚泥量との比を一定となるように
制御すると、曝気槽内の滞留時間が一定とする制御と合
せて、処理の安定化がよシ良くなる。- If the amount of returned sludge is changed according to the amount of inflowing sewage and the ratio of the amount of inflow fjff to the amount of returned sludge is controlled to be constant, it will be possible to control the residence time in the aeration tank to be constant. This improves processing stability.
第３図は本発明の他の実施例を示すもので、曝気槽ｌと
沈殿池２を同一レベルに設置し、制御弁１３の代りにポ
ンプ１７を用いたものである。流入流型に応じて、曝気
槽１の水位を変え、滞留時間を一定にするようにポンプ
１７を制御することで、前記の制御弁と同様の効果が期
待され、ブロワ醒力量の低減と、処理の安定化が可能と
なる。FIG. 3 shows another embodiment of the present invention, in which the aeration tank 1 and the settling tank 2 are installed at the same level, and a pump 17 is used in place of the control valve 13. By controlling the pump 17 to change the water level in the aeration tank 1 and keep the residence time constant according to the inflow type, the same effect as the control valve described above can be expected, and the blower wake-up force can be reduced. Processing can be stabilized.
このように、本発明によれば処理場の消費電力の大部分
を占めているプロワ−電力値の低減と処理の安定化が可
能となる。As described above, according to the present invention, it is possible to reduce the power value of the blower, which accounts for most of the power consumption in a processing plant, and to stabilize the processing.
第１図は従来装置の一例を示す構成図、ｇ２図は本発明
の一実施例を示す構成図、第３図は本発明の他の実施例
を示す構成図である。
１・・・曝気槽・、２・・・沈殿池、３・・・返送汚泥
ポンプ、４・・・余剰汚泥ポンプ゛、５・・・プＬＪソ
、６・・・υ１し人〆り水管、７・・・混合液管、８・
・・処理水管、９・・・汚泥引抜管、１２・・・風量調
節弁、１３・・・流量制御弁、１４蔓 ２（２Ｎ
富３Ｉ２１ＩFIG. 1 is a block diagram showing an example of a conventional device, FIG. g2 is a block diagram showing an embodiment of the present invention, and FIG. 3 is a block diagram showing another embodiment of the present invention. 1... Aeration tank, 2... Sedimentation tank, 3... Return sludge pump, 4... Excess sludge pump, 5... Plumbing tank, 6... υ1 water pipe , 7... mixed liquid pipe, 8...
... Treated water pipe, 9 ... Sludge extraction pipe, 12 ... Air volume control valve, 13 ... Flow rate control valve, 14 Vine 2 (2N Tomi 3I21I
Claims (1)
り流出する混合液を汚泥と処理水とに分離する沈殿池と
、前記曝気槽から前記沈殿池へ流入する混合液量を制＠
１する混合液量制御手段と、前記沈殿池より前記曝気槽
に返送される返送汚泥量を制御する返送汚泥量制御手段
と、前記曝気槽への曝気風量を制御する曝気風量制御手
段とを具備し、流入汚水量に基づき前記曝気槽の混合液
水位を変化させ、この混合液水位に応じて前記曝気風量
と風量吐出圧を調節するようにしたことを特徴とする活
性汚泥水処理装置。1. An aeration tank to which sewage and return sludge are supplied, a settling tank that separates the mixed liquid flowing out from the aeration tank into sludge and treated water, and controlling the amount of mixed liquid flowing from the aeration tank to the settling tank. @
1; a return sludge amount control means for controlling the amount of returned sludge returned from the settling tank to the aeration tank; and an aeration air volume control means for controlling the amount of aeration air to the aeration tank. An activated sludge water treatment apparatus characterized in that the mixed liquid level in the aeration tank is changed based on the amount of inflowing sewage, and the aeration air volume and air volume discharge pressure are adjusted in accordance with the mixed liquid water level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56132724A JPS5834091A (en) | 1981-08-26 | 1981-08-26 | Water purifier using activated sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56132724A JPS5834091A (en) | 1981-08-26 | 1981-08-26 | Water purifier using activated sludge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5834091A true JPS5834091A (en) | 1983-02-28 |
Family
ID=15088094
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56132724A Pending JPS5834091A (en) | 1981-08-26 | 1981-08-26 | Water purifier using activated sludge |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5834091A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102897903A (en) * | 2012-09-26 | 2013-01-30 | 冯秀娟 | Efficient biochemical reactor |
-
1981
- 1981-08-26 JP JP56132724A patent/JPS5834091A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102897903A (en) * | 2012-09-26 | 2013-01-30 | 冯秀娟 | Efficient biochemical reactor |
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