JP2000288588A - Sludge scraper - Google Patents
Sludge scraperInfo
- Publication number
- JP2000288588A JP2000288588A JP11097394A JP9739499A JP2000288588A JP 2000288588 A JP2000288588 A JP 2000288588A JP 11097394 A JP11097394 A JP 11097394A JP 9739499 A JP9739499 A JP 9739499A JP 2000288588 A JP2000288588 A JP 2000288588A
- Authority
- JP
- Japan
- Prior art keywords
- sludge
- sewage
- scraper
- scraping
- sludge scraper
- 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
- 239000010802 sludge Substances 0.000 title claims abstract description 68
- 238000007790 scraping Methods 0.000 claims abstract description 29
- 239000010865 sewage Substances 0.000 claims abstract description 25
- 238000005276 aerator Methods 0.000 claims abstract description 12
- 239000010840 domestic wastewater Substances 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 claims abstract description 5
- 238000000926 separation method Methods 0.000 claims abstract description 5
- 238000005273 aeration Methods 0.000 abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 16
- 238000004062 sedimentation Methods 0.000 description 14
- 230000003647 oxidation Effects 0.000 description 9
- 238000007254 oxidation reaction Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 6
- 244000005700 microbiome Species 0.000 description 5
- 238000003756 stirring Methods 0.000 description 4
- 239000002351 wastewater Substances 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000005189 flocculation Methods 0.000 description 2
- 230000016615 flocculation Effects 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 238000013019 agitation Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 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)
- Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
- Treatment Of Sludge (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、汚泥掻寄装置、特
に、生活排水などの汚水を処理し、かつ固液分離を行う
オキシデーションディッチ等の汚水処理槽に適用するも
ので、曝気処理する汚水の流速を利用して汚泥掻寄機を
駆動し、省エネ運転を可能とした汚泥掻寄装置に関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is applied to a sludge scraping apparatus, particularly a wastewater treatment tank such as an oxidation ditch for treating wastewater such as domestic wastewater and performing solid-liquid separation. The present invention relates to a sludge scraping apparatus that drives a sludge scraper using the flow rate of wastewater to enable energy-saving operation.
【０００２】[0002]
【従来の技術】従来、生活排水などの汚水を処理し、か
つ固液分離を行うために、汚水処理の安定性等から円形
又は長円形の曝気槽を有するオキシデーションディッチ
法が多く採用されている。このオキシデーションディッ
チ法は、曝気機の攪拌流速により、汚水と活性汚泥微生
物とを混合攪拌して水を処理するもので、このオキシデ
ーションディッチ等の円形沈澱池に設置する汚泥掻寄機
は、沈澱池の中央部に駆動装置を設置して駆動するよう
にしている。この中央駆動方式においては、駆動モータ
の回転力を減速機等により適当な速度に減速し、汚泥掻
寄フライト、スカム掻寄フライト等を、通常、２４時間
周回するようにして、沈澱池の底に沈澱する汚泥を掻き
寄せるようにしている。2. Description of the Related Art Conventionally, an oxidation ditch method having a circular or oblong aeration tank has been widely used for treating sewage such as domestic wastewater and performing solid-liquid separation in view of the stability of sewage treatment. I have. This oxidation ditch method is a method of treating water by mixing and stirring sewage and activated sludge microorganisms by the stirring flow rate of an aerator, and a sludge scraper installed in a circular sedimentation pond such as this oxidation ditch is A driving device is installed at the center of the settling basin for driving. In this central drive system, the rotational force of the drive motor is reduced to an appropriate speed by a speed reducer or the like, and a sludge scraping flight, a scum scraping flight, or the like is normally circulated for 24 hours, so that the bottom of the sedimentation basin is rotated. The sludge that settles on the surface is swept up.
【０００３】[0003]
【発明が解決しようとする課題】ところで、近年、汚水
処理の安定性等から多く採用されているオキシデーショ
ンディッチ法において、曝気機の攪拌流速により、汚水
と活性汚泥微生物とを混合攪拌して水を処理する適正な
攪拌流速は、汚泥が曝気槽に沈澱堆積しない速度、例え
ば、１０ｃｍ／ｓｅｃ以上であるが、最近採用されてい
るオキシデーションディッチ法の曝気槽の平均流速は、
数１０ｃｍ／ｓｅｃ以上、特に、流速の損失の少ない円
形の沈澱池あるいは曝気槽の場合、平均流速が７０〜８
０ｃｍ／ｓｅｃ以上にもなるにも関わらず、汚泥掻寄機
をモータにて駆動しているため、駆動モータによる電力
の消費を必要とするという問題点があった。By the way, in the oxidation ditch method which has been widely used in recent years because of the stability of sewage treatment and the like, the sewage and activated sludge microorganisms are mixed and stirred by the stirring flow rate of an aerator. The appropriate agitation flow rate for treating is a rate at which the sludge does not precipitate and accumulate in the aeration tank, for example, 10 cm / sec or more, but the average flow rate of the aeration tank of the recently adopted oxidation ditch method is:
In the case of a circular sedimentation basin or an aeration tank having a flow rate of several tens cm / sec or more, especially with a small flow rate loss, the average flow velocity is 70 to 8
The sludge scraper is driven by a motor despite the fact that the speed is 0 cm / sec or more. Therefore, there is a problem that power consumption by the drive motor is required.
【０００４】本発明は、上記従来の汚泥掻寄装置の有す
る問題点を解決し、曝気槽の流速、特に、余剰流速を利
用して、無電力で汚泥掻寄機を駆動することができる汚
泥掻寄装置を提供することを目的とする。[0004] The present invention solves the above-mentioned problems of the conventional sludge scraping apparatus, and can use a flow rate of an aeration tank, particularly a surplus flow rate, to drive a sludge scraper without electric power. It is an object to provide a scraping device.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するた
め、本発明の汚泥掻寄装置は、生活排水などの汚水を処
理し、かつ固液分離を行う汚水処理槽に設置される曝気
機の運転にて生じる汚水の流速を利用して回転するよう
に配設した羽根車と、槽底に沈澱した汚泥を掻き寄せる
汚泥掻寄機と、羽根車の回転駆動力を汚泥掻寄機に伝達
する速度調整装置とより構成したことを特徴とする。In order to achieve the above object, a sludge scraper according to the present invention is provided with an aerator installed in a sewage treatment tank for treating sewage such as domestic wastewater and performing solid-liquid separation. An impeller arranged to rotate using the flow rate of sewage generated during operation, a sludge scraper that scrapes sludge settled at the bottom of the tank, and the rotational driving force of the impeller transmitted to the sludge scraper And a speed adjusting device.
【０００６】上記の構成からなる本発明の汚泥掻寄装置
は、曝気槽の流速、特に、余剰流速を利用して汚泥掻寄
機を駆動するようにしているため、無電力にて汚泥掻寄
機の駆動が行えるとともに、流入水量が多い時に運転で
きるため、掻寄効率が高くなり、汚泥掻寄フライト等の
摩耗を防止することができ、さらには曝気槽内の流速を
適度に低下させ、活性汚泥微生物のフロック化を促進で
きる。In the sludge scraping apparatus of the present invention having the above-described structure, the sludge scraper is driven by using the flow rate of the aeration tank, particularly, the excess flow rate. Since the machine can be driven and can be operated when the amount of inflow water is large, the scraping efficiency is increased, the abrasion of sludge scraping flight etc. can be prevented, and the flow velocity in the aeration tank is appropriately reduced, Flocculation of activated sludge microorganisms can be promoted.
【０００７】[0007]
【発明の実施の形態】以下、本発明の汚泥掻寄装置の実
施の形態を図面に基づいて説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a sludge scraping apparatus according to the present invention will be described below with reference to the drawings.
【０００８】図１〜図２に、本発明の汚泥掻寄装置の第
１実施例を示す。図において１は、円形の曝気槽で、曝
気槽１の内周側に沈澱池２を配置し、曝気槽１と沈澱池
２とより二重円形の汚水処理槽を構成している。また、
オキシデーションディッチ法は、曝気槽１と沈澱池２と
が互いに連通しており、汚水量が多い時刻には、曝気槽
１の混合液が沈澱池２へ多く流入し、汚泥の流入負荷量
が増加するようになっている。FIGS. 1 and 2 show a first embodiment of a sludge scraping apparatus according to the present invention. In the figure, reference numeral 1 denotes a circular aeration tank, in which a sedimentation basin 2 is arranged on the inner peripheral side of the aeration tank 1, and the aeration tank 1 and the sedimentation basin 2 constitute a double circular sewage treatment tank. Also,
In the oxidation ditch method, the aeration tank 1 and the sedimentation basin 2 are in communication with each other, and at a time when the amount of sewage is large, a large amount of the mixed solution in the aeration tank 1 flows into the sedimentation basin 2 and the inflow load of the sludge is reduced. It is increasing.
【０００９】また、曝気槽１には、曝気機３と、曝気機
３の運転により曝気槽内に生じる水流を利用して回転す
るようにして槽内の流速の方向が均一で、速度が大きい
場所に羽根車５を設置する。この羽根車５は、曝気槽１
に軸受５１にて軸５３を回転可能にして支持するととも
に、軸５３に水車式、その他の方式による羽根車本体５
２を固定して構成し、かつ羽根車本体５２の羽根の一部
を曝気槽１内、例えば、汚水水面に浸漬して、水流の作
用にて回転するように設置する。これにより、羽根車５
は、水車のごとく流速によって回転する。The aeration tank 1 is rotated by utilizing an aerator 3 and a water flow generated in the aeration tank by the operation of the aerator 3 so that the direction of the flow velocity in the tank is uniform and the speed is large. The impeller 5 is installed at the place. The impeller 5 includes an aeration tank 1
The shaft 53 is rotatably supported by a bearing 51, and the impeller body 5 of a water wheel type or another type is mounted on the shaft 53.
2 is fixed, and a part of the blades of the impeller body 52 is immersed in the aeration tank 1, for example, on the surface of sewage water, and is installed so as to rotate by the action of the water flow. Thereby, the impeller 5
Rotates according to the flow velocity like a water wheel.
【００１０】また、沈澱池２には、汚泥掻寄機４が配設
される。この汚泥掻寄機４は、図２に示すように、水面
に浮遊するスカムを掻き寄せるスカム掻寄フライト４１
と、底部に沈澱する汚泥を掻き寄せる汚泥掻寄フライト
４２とを上下に配置し、かつ水面上に配置した速度調整
装置４３とより構成し、速度調整装置４３を、前記羽根
車の軸５３と接続して汚泥掻寄機４を駆動するようにす
る。In the settling basin 2, a sludge scraper 4 is provided. As shown in FIG. 2, the sludge scraping machine 4 includes a scum scraping flight 41 for scraping scum floating on the water surface.
And a sludge scraping flight 42 for scraping the sludge settled to the bottom, and a speed adjusting device 43 arranged above and below the water surface, and the speed adjusting device 43 is provided with the shaft 53 of the impeller. The connection is made to drive the sludge scraper 4.
【００１１】下水処理場において、生活排水等の汚水
は、ポンプ等の手段により曝気槽１内に流入し、ここで
曝気機３により曝気と攪拌が行われて汚水と活性汚泥微
生物とが混合・接触し、汚水中の有機物が分解、除去さ
れる。この曝気機３は、通常タイマーにより運転される
が、その設定は流入パターンを考慮して、汚水量の多い
時刻には曝気時間が長く、逆に汚水量が少ない時刻には
曝気時間が短く設定される。In the sewage treatment plant, sewage such as domestic wastewater flows into the aeration tank 1 by means of a pump or the like, where aeration and stirring are performed by the aerator 3 to mix the sewage and activated sludge microorganisms. The organic matter in the sewage is decomposed and removed upon contact. The aerator 3 is normally operated by a timer, and the setting is set in consideration of the inflow pattern, by setting a long aeration time at a time when the amount of sewage is large and a short time at a time when the amount of sewage is small. Is done.
【００１２】したがって、曝気槽１と沈澱池２が連通し
ているので、汚水量が多い時刻には、曝気槽の混合液が
沈澱池へ多く流入し、汚泥の流入負荷量が増加すること
になる。この場合、汚水量が多い時刻には汚泥掻寄機を
長時間運転して、汚泥を中央ピットに集めて、曝気槽へ
汚泥を多く返送する必要がある。逆に、汚水の流入量が
少ない深夜等は、沈澱池に汚泥が流入することが少ない
ので、汚泥掻寄機を連続運転しても、掻寄効率は低くな
る。Therefore, since the aeration tank 1 and the sedimentation basin 2 communicate with each other, at a time when the amount of sewage is large, a large amount of the mixed solution in the aeration tank flows into the sedimentation basin, and the inflow load of the sludge increases. Become. In this case, it is necessary to operate the sludge scraper for a long time at a time when the amount of wastewater is large, collect the sludge in the central pit, and return a large amount of the sludge to the aeration tank. Conversely, in the middle of the night when the inflow of sewage is small, sludge rarely flows into the sedimentation basin. Therefore, even if the sludge scraper is continuously operated, the scraping efficiency is reduced.
【００１３】このようにして曝気機３は、流入水量に応
じて運転され、曝気槽内に水流が発生する。この水流の
速度は、平均流速が７０〜８０ｃｍ／ｓｅｃ以上にもな
っている。この曝気槽１内の水流にて羽根車５は回転
し、その回転力は軸５３を介して汚泥掻寄機４の速度調
整装置４３に伝達されてスカム掻寄フライト４１及び汚
泥掻寄フライト４２とが駆動され、底部に沈澱した汚泥
が掻き寄せられる。このようにすることにより、沈澱池
１の汚泥流入負荷量が大きい時に、曝気機３が運転さ
れ、発生する水流を利用して汚泥掻寄機４を長く運転で
きるので効率的であり、しかも曝気槽１における余剰流
速を利用して汚泥掻寄を行うため、省エネ運転ができ
る。In this way, the aerator 3 is operated according to the amount of inflow water, and a water flow is generated in the aeration tank. The velocity of the water flow is such that the average flow velocity is 70 to 80 cm / sec or more. The impeller 5 is rotated by the water flow in the aeration tank 1, and the rotational force is transmitted to the speed adjusting device 43 of the sludge scraper 4 via the shaft 53, and the scum scraping flight 41 and the sludge scraping flight 42 are transmitted. Is driven, and the sludge settled to the bottom is swept up. In this way, when the sludge inflow load into the sedimentation basin 1 is large, the aerator 3 is operated, and the sludge scraper 4 can be operated for a long time by using the generated water flow. Since the sludge is scraped using the excess flow velocity in the tank 1, energy saving operation can be performed.
【００１４】図３に、本発明の汚泥掻寄装置の第２実施
例を示す。本実施例は、長円形のオキシデーションディ
ッチ槽１０と円形の沈澱池２とを組み合わせて汚泥の掻
き寄せを行うようにしたものである。この場合、長円形
のオキシデーションディッチ槽１０に曝気機３と羽根車
５を設置し、円形沈澱池２に汚泥掻寄機４を設置し、羽
根車５の回転駆動力を汚泥掻寄機４に伝達する。これに
より、汚泥掻寄機４は、速度調整装置４３により、汚泥
の掻き寄せに適正な速度に調整され、水中部の汚泥掻寄
フライト４２、水上部のスカム掻寄フライト４１を周回
させ、汚泥及びスカムを所定の位置まで掻き寄せるもの
である。なお、本実施例のその他の構成及び作用は、上
記第１実施例の汚泥掻寄装置と同様である。FIG. 3 shows a second embodiment of the sludge scraping apparatus of the present invention. In this embodiment, sludge is swept together by combining an oval oxidation ditch tank 10 and a circular sedimentation basin 2. In this case, the aeration device 3 and the impeller 5 are installed in the oval oxidation ditch tank 10, the sludge scraper 4 is installed in the circular sedimentation pond 2, and the rotational driving force of the impeller 5 is set to the sludge scraper 4. To communicate. Thereby, the sludge scraper 4 is adjusted to a speed appropriate for the scraping of the sludge by the speed adjusting device 43, and the sludge scraping flight 42 in the underwater portion and the scum scraping flight 41 in the water surface are rotated. And scum is swept up to a predetermined position. Other configurations and operations of the present embodiment are the same as those of the sludge scraping device of the first embodiment.
【００１５】[0015]
【発明の効果】本発明の汚泥掻寄装置によれば、曝気槽
の流速、特に、余剰流速を利用して汚泥掻寄機を駆動す
るようにしているため、無電力にて汚泥掻寄機の駆動が
行えるとともに、流入水量が多い時に運転できるため、
掻寄効率が高くなり、汚泥掻寄フライト等の摩耗を防止
することができ、さらには曝気棺内の流速を適度に低下
させ、活性汚泥微生物のフロック化を促進できる。According to the sludge scraper of the present invention, the sludge scraper is driven by utilizing the flow rate of the aeration tank, particularly the excess flow rate, so that the sludge scraper is operated without electric power. And can be operated when the amount of inflow water is large,
The scraping efficiency is increased, and abrasion such as sludge scraping flight can be prevented. Further, the flow rate in the aeration coffin can be appropriately reduced, and flocculation of activated sludge microorganisms can be promoted.
【図１】本発明の汚泥掻寄機の第１実施例を示す平面図
である。FIG. 1 is a plan view showing a first embodiment of a sludge scraper of the present invention.
【図２】同断面図である。FIG. 2 is a sectional view of the same.
【図３】本発明の汚泥掻寄機の第２実施例を示す平面図
である。FIG. 3 is a plan view showing a second embodiment of the sludge scraper of the present invention.
１ 曝気槽 ２ 沈澱池 ３ 曝気機 ４ 汚泥掻寄機 ４１ スカム掻寄フライト ４２ 汚泥掻寄フライト ４３ 速度調整装置 ５ 羽根車 ５１ 軸受 ５２ 羽根車本体 ５３ 軸 REFERENCE SIGNS LIST 1 aeration tank 2 sedimentation basin 3 aerator 4 sludge scraper 41 scum scraper flight 42 sludge scraper flight 43 speed adjusting device 5 impeller 51 bearing 52 impeller body 53 shaft
Claims (1)
分離を行う汚水処理槽に設置される曝気機の運転にて生
じる汚水の流速を利用して回転するように配設した羽根
車と、底部に沈澱した汚泥を掻き寄せる汚泥掻寄機と、
羽根車の回転駆動力を汚泥掻寄機に伝達する速度調整装
置とより構成したことを特徴とする汚泥掻寄装置。An impeller arranged to rotate using the flow rate of sewage generated by the operation of an aerator installed in a sewage treatment tank for treating sewage such as domestic wastewater and performing solid-liquid separation. And a sludge scraper that scrapes the sludge settled at the bottom,
A sludge scraping device comprising a speed adjusting device for transmitting the rotational driving force of an impeller to a sludge scraper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11097394A JP2000288588A (en) | 1999-04-05 | 1999-04-05 | Sludge scraper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11097394A JP2000288588A (en) | 1999-04-05 | 1999-04-05 | Sludge scraper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000288588A true JP2000288588A (en) | 2000-10-17 |
Family
ID=14191312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11097394A Pending JP2000288588A (en) | 1999-04-05 | 1999-04-05 | Sludge scraper |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000288588A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011092942A (en) * | 2011-02-17 | 2011-05-12 | Kurita Water Ind Ltd | Nitrogen-containing wastewater treatment method and treatment apparatus |
| CN105152332A (en) * | 2015-09-26 | 2015-12-16 | 胡海平 | Sewage treatment system using aeration action for reducing sludge deposit at tank bottom |
| CN118954790A (en) * | 2024-10-12 | 2024-11-15 | 靖江市华汇城市污水处理有限公司 | A sewage treatment device for sewage treatment |
-
1999
- 1999-04-05 JP JP11097394A patent/JP2000288588A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011092942A (en) * | 2011-02-17 | 2011-05-12 | Kurita Water Ind Ltd | Nitrogen-containing wastewater treatment method and treatment apparatus |
| CN105152332A (en) * | 2015-09-26 | 2015-12-16 | 胡海平 | Sewage treatment system using aeration action for reducing sludge deposit at tank bottom |
| CN118954790A (en) * | 2024-10-12 | 2024-11-15 | 靖江市华汇城市污水处理有限公司 | A sewage treatment device for sewage treatment |
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