JPH0316697A - Apparatus for treating sewage - Google Patents
Apparatus for treating sewageInfo
- Publication number
- JPH0316697A JPH0316697A JP1150277A JP15027789A JPH0316697A JP H0316697 A JPH0316697 A JP H0316697A JP 1150277 A JP1150277 A JP 1150277A JP 15027789 A JP15027789 A JP 15027789A JP H0316697 A JPH0316697 A JP H0316697A
- Authority
- JP
- Japan
- Prior art keywords
- sludge
- aeration tank
- sewage
- wastewater
- tank
- 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
- 239000010865 sewage Substances 0.000 title claims abstract description 32
- 238000005273 aeration Methods 0.000 claims abstract description 38
- 239000002351 wastewater Substances 0.000 claims description 28
- 238000013019 agitation Methods 0.000 claims description 14
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 11
- 229910052760 oxygen Inorganic materials 0.000 claims description 11
- 239000001301 oxygen Substances 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 5
- 239000010802 sludge Substances 0.000 abstract description 34
- 238000004062 sedimentation Methods 0.000 abstract description 14
- 238000003756 stirring Methods 0.000 abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 13
- 238000000034 method Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 235000012489 doughnuts Nutrition 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 238000006864 oxidative decomposition reaction Methods 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- 239000006228 supernatant Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 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
- Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は汚水処理装置１ご係゜り、特にオキシデーショ
ンデイツチ法による汚水処理装置であって、曝気槽がド
ーナッツ状に形威された汚水処理装置に関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a sewage treatment device 1, particularly a sewage treatment device using the oxidation date method, in which the aeration tank is shaped like a donut. Regarding sewage treatment equipment.
従来、この種の汚水処理装置は、曝気槽に貯留された汚
水に酸素を供給し汚水中の有機物を酸化分解させて汚水
を浄化するために設けられている。そこで、前記汚水に
酸素を供給する方法の１つとして、オキシデーションデ
イツチ法と呼ばれる方法があり、この方法は、水深１ｍ
前後の曝気槽の上部幅方向に表面攪拌装置を設け、この
表面攪拌装置の回動によって、汚水を曝気槽内で循環さ
せながら汚水に酸素を供給して汚水を処理する方法であ
る。Conventionally, this type of sewage treatment apparatus is provided to purify the sewage by supplying oxygen to the sewage stored in an aeration tank to oxidize and decompose organic matter in the sewage. Therefore, one method of supplying oxygen to the wastewater is a method called the oxidation date method, which is carried out at a depth of 1 m.
In this method, a surface agitation device is provided in the upper width direction of the front and rear aeration tanks, and by rotating the surface agitation device, the wastewater is circulated within the aeration tank and oxygen is supplied to the wastewater to treat the wastewater.
前記オキシデーションデイツチ法を適用した汚水処理装
置は、第３図、第４図に示すように、曝気槽１がドーナ
ツツ状に形或され、この曝気槽１には汚水２が貯留され
ている。更に、前記曝気槽ｌの上部幅方向には、多数の
羽根３ａ，３ａ・・・が形或されたロータ（表面攪拌装
置）３が回動自在に取り付けられている。また、このロ
ータ３は駆動部（図示せず）に連結されている。更に、
前記ロータ３は第４図に詳細に示すように、羽根３ａが
汚水２の水面に対し所定量水沈するように設置され、ロ
ータ３の反時計回りの回動によって、汚水２を第３図中
反時計回り（矢印八方向）に循環させている。更に、前
記曝気槽１の上部幅方向には、バツブルプレート４が取
り付けられており、このバツプルプレート４は前記ロー
タ３に対して汚水循環方向側に設置されている。また、
前記バツプルプレート４は、ロータ３の回動によって循
環してきた水面の汚水２を、曝気槽１の上方向に案内す
るように水面に対して傾斜して設けられている。これに
より、曝気槽１内の汚水２は、ロータ３の回動によって
、循環されながら酸素が供給され、更に酸素が供給され
た汚水２は、バツプルプレート４によって曝気槽１の下
方向に供給されて汚水全域が曝気されている。As shown in FIGS. 3 and 4, the sewage treatment equipment to which the oxidation date method is applied has an aeration tank 1 shaped like a doughnut, and sewage 2 is stored in the aeration tank 1. . Furthermore, a rotor (surface stirring device) 3 having a large number of blades 3a, 3a, . . . is rotatably attached to the upper width direction of the aeration tank 1. Further, this rotor 3 is connected to a drive section (not shown). Furthermore,
As shown in detail in FIG. 4, the rotor 3 is installed such that the blades 3a are submerged by a predetermined amount in the water surface of the wastewater 2, and by counterclockwise rotation of the rotor 3, the wastewater 2 is lowered to the surface of the wastewater 2 as shown in FIG. It is circulated counterclockwise (in the eight directions of the arrows). Further, a bubble plate 4 is attached to the upper width direction of the aeration tank 1, and this bubble plate 4 is installed on the side of the rotor 3 in the sewage circulation direction. Also,
The bubble plate 4 is provided to be inclined with respect to the water surface so as to guide the dirty water 2 on the water surface, which has been circulated by the rotation of the rotor 3, upward in the aeration tank 1. As a result, the waste water 2 in the aeration tank 1 is supplied with oxygen while being circulated by the rotation of the rotor 3, and the waste water 2 to which oxygen has been supplied is further supplied downward to the aeration tank 1 by the bubble plate 4. The entire wastewater area is aerated.
しかしながら、従来の汚水処理装置では、ロータ３から
送り出された汚水２が、該ロータ３に対して直進するた
め、曝気槽１の内周方向の汚水流によどみ（このよどみ
はロータ３の反対側で顕著に生じる。〉が生じ、また曝
気槽１の下方向になるに従い汚水の循ｉ速度が遅くなる
。However, in conventional sewage treatment equipment, the sewage 2 sent out from the rotor 3 travels straight to the rotor 3, so it stagnates in the sewage flow in the inner circumferential direction of the aeration tank 1 (this stagnation occurs on the opposite side of the rotor 3). This occurs conspicuously in the aeration tank 1, and the rate of circulation of wastewater slows down toward the bottom of the aeration tank 1.
これにより、汚水２中に沈鮫が発生しはじめ、汚水２中
の有機物の酸化分解作用が低下するという欠点があった
。そこで、前記不具合を解消するために、ロータ３の回
転速度を速くして汚水全域の循環速度を均一に保持する
方法があるが、この方法では、ロータ３の回転速度の制
御が難しく、また汚水２への酸素供給量が過剰となり酸
化分解の処理能力が低下するという欠点があった。As a result, sediments begin to appear in the wastewater 2, and the oxidative decomposition effect of organic matter in the wastewater 2 is reduced. Therefore, in order to solve the above problem, there is a method of increasing the rotation speed of the rotor 3 to maintain a uniform circulation speed throughout the wastewater area, but with this method, it is difficult to control the rotation speed of the rotor 3, and the waste water There was a drawback that the amount of oxygen supplied to No. 2 was excessive and the treatment capacity for oxidative decomposition was reduced.
本発明の目的は上述した欠点に鑑みなされたもので、全
体的な汚水の循環速度が遅くとも沈澱を防止することの
できる汚水処理装置を提供するにある。The object of the present invention was made in view of the above-mentioned drawbacks, and it is an object of the present invention to provide a sewage treatment device that can prevent sedimentation even if the overall sewage circulation rate is slow.
前記目的を達戊するために、本発明は、ドーナッツ状の
曝気槽の半径方向に表面攪拌装置を設置し、該表面攪拌
装置の回動によって、前記曝気槽に貯留された汚水中に
酸素を供給すると共に、汚水を循環させるよう構戒した
汚水処理装置において、沈澱池からの返送物を、曝気槽
の中心に対し表面攪拌槽の反対側付近の内周方向底部に
噴射させるよう構戊したものである。In order to achieve the above object, the present invention installs a surface agitation device in the radial direction of a donut-shaped aeration tank, and by rotating the surface agitation device, oxygen is introduced into the wastewater stored in the aeration tank. In a sewage treatment equipment designed to supply and circulate sewage, the system was designed to inject the return material from the sedimentation tank to the bottom of the inner periphery near the opposite side of the surface agitation tank from the center of the aeration tank. It is something.
このように本発明は、汚泥等の返送物の返送位置をよど
みが最も生じ易い位置から噴射するようにしたので、該
位置の汚水の循環速度が速まり、これによって全体的な
汚水の循環速度を速くしなくても沈澱の発生が防止され
る。In this way, in the present invention, since the return material such as sludge is injected from the position where stagnation is most likely to occur, the circulation speed of the wastewater at this position is increased, thereby increasing the overall circulation speed of the wastewater. Precipitation can be prevented without increasing the speed.
以下、図に示す実施例を用いて本発明の詳細を説明する
。Hereinafter, details of the present invention will be explained using examples shown in the drawings.
第ｌ図は本発明に係る汚水処理装置の一実施例を示す平
面図、第２図は第１図を■−■線で切断したときの断面
図である。本装置にあっては、ドーナッツ状の曝気槽５
の上部半径方向に表面攪拌装置６が設置されており、該
表面攪拌装Ｗｌ６の回勤によって前記曝気槽５に貯留さ
れた汚水７中に酸素を供給すると共に、該汚水７を循環
させるよう構威されている。なお、前記曝気槽５の下流
側にはバップルプレート８が配設されており、該バツプ
ルプレート８は表面攪拌装置６の回動によって循環して
きた水面の汚水７を、曝気槽５の上方向に案内するよう
に水面に対して傾斜して設けられている。このような構
成により、曝気槽５内の汚水７は、表面攪拌装置６の回
動によって、循環されながら酸素が供給され、更に酸素
が供給された汚水７は、バツブルプレート８によって曝
気槽５の下方向に供給されて汚水全域が曝気されるよう
になっている。FIG. 1 is a plan view showing an embodiment of the sewage treatment apparatus according to the present invention, and FIG. 2 is a sectional view taken along the line 1--2 of FIG. In this device, the donut-shaped aeration tank 5
A surface agitation device 6 is installed in the upper radial direction of the surface agitation device Wl6, and is configured to supply oxygen to the wastewater 7 stored in the aeration tank 5 and circulate the wastewater 7 by rotating the surface agitation device W16. being intimidated. Note that a bipple plate 8 is disposed downstream of the aeration tank 5, and the bipple plate 8 moves the sewage 7 on the water surface that has been circulated by the rotation of the surface stirring device 6 to the top of the aeration tank 5. It is installed at an angle with respect to the water surface so as to guide you in the direction of the water. With this configuration, the sewage 7 in the aeration tank 5 is supplied with oxygen while being circulated by the rotation of the surface stirring device 6, and the sewage 7 to which oxygen has been supplied is transferred to the aeration tank 5 by the bubble plate 8. The wastewater is supplied downwards to aerate the entire wastewater area.
また、本実施例にあっては、ドーナッツ状曝気槽５の内
部側を沈澱池としており、該沈澱池９には排泥管１０が
接続されている。該排泥管１０にはポンブｌ１を介して
返送汚泥管１２が接続されている。なお、このポンプ１
１は、第１図に示すように、曝気槽５の外側の排泥ピッ
ト１５内に配設されており、返送汚泥管ｌ２はこのポン
プ１ｌの位置から沈澱池９の外側近傍まで延設され、該
位置において第２図に示すように曝気槽５の上方から該
曝気槽５内に入り返送汚泥ヘツダｌ３に接続されている
。該返送汚泥ヘツダ１３は、第１図から明らかなように
その平面視形状が円弧状に形或されていると共に前記沈
澱池９の外側近傍に配設されており、かつその外側面側
には長手方向に所定の間隔をおいて複数のノズル１４が
設けられている。これを更に詳述すると、前記返送汚泥
ヘツダ１３は、第１図に示すように、曝気槽５の中心に
対し表面攪拌装置６の反対側付近の内周側（沈澱池９の
外側〉の底部に設けられている。したがって、前記沈澱
池９からの返送汚泥は、徘泥管１０、返送汚泥管１２を
通った後、返送汚泥ヘッダ１３のノズル１４から表面攪
拌装置６の反対側付近の曝気槽５の内周方向底部に向け
て噴射されることになる。これによって、汚水７の循環
速度が局部的に速まり、沈澱を防止することができる。Further, in this embodiment, the inside of the donut-shaped aeration tank 5 is used as a sedimentation tank, and the sedimentation tank 9 is connected to a sludge drain pipe 10. A return sludge pipe 12 is connected to the sludge discharge pipe 10 via a pump l1. In addition, this pump 1
1 is arranged in a sludge pit 15 outside the aeration tank 5, and a return sludge pipe 12 is extended from the position of this pump 1l to near the outside of the settling tank 9. At this position, as shown in FIG. 2, the aeration tank 5 enters the aeration tank 5 from above and is connected to the return sludge header 13. As is clear from FIG. 1, the return sludge header 13 has an arcuate shape in plan view, and is disposed near the outside of the sedimentation tank 9, and has a groove on its outside surface. A plurality of nozzles 14 are provided at predetermined intervals in the longitudinal direction. To explain this in more detail, the return sludge header 13 is located at the bottom of the inner peripheral side (outside of the settling tank 9) near the opposite side of the surface agitator 6 with respect to the center of the aeration tank 5, as shown in FIG. Therefore, the return sludge from the sedimentation tank 9 passes through the wandering sludge pipe 10 and the return sludge pipe 12, and then flows from the nozzle 14 of the return sludge header 13 to the aeration near the opposite side of the surface agitation device 6. The water is injected toward the bottom in the inner circumferential direction of the tank 5. As a result, the circulation speed of the wastewater 7 is locally increased, and precipitation can be prevented.
特に、本実施例にあっては沈澱池９からの返送汚泥を該
汚泥のよどみが最も生じ易い位置から噴射するようにし
ており、該位置の汚水の循環速度を速めているので、全
体的な汚水の循環速度が遅くとも沈澱の発生をより効果
的に防止することができる。In particular, in this embodiment, the return sludge from the settling tank 9 is injected from the position where stagnation of the sludge is most likely to occur, and the circulation speed of the sewage at this position is increased, so that the overall Even if the circulation speed of wastewater is slow, the generation of sediment can be more effectively prevented.
なお、オキシデーションデイツチ法も通常の活性汚泥法
と同様に溢流水を沈澱池９に通し、沈澱汚泥の一部を返
送汚泥として曝気槽５に戻し、余剰汚泥は脱水した後処
理処分し、上澄み水は処理水として放流している。In addition, in the oxidation date method, like the normal activated sludge method, overflow water is passed through the settling tank 9, a part of the settled sludge is returned to the aeration tank 5 as return sludge, and the excess sludge is dehydrated and then treated and disposed of. The supernatant water is discharged as treated water.
なお、上述した実施例においては返送汚泥をノズルから
噴射させるようにしているが、返送物は該返送汚泥に限
らず原水または沈澱池上澄み水であってもよい。In the above embodiment, the returned sludge is injected from the nozzle, but the returned material is not limited to the returned sludge, but may be raw water or sedimentation tank supernatant water.
以上説明したように、本発明に係る汚水処理装置によれ
ば、曝気槽の中心に対し表面攪拌槽の反対側付近の内周
方向底部に沈澱池からの返送物を噴射させるよう構成し
たので、該汚泥のよどみが最も生じ易い位置の汚水の循
環速度を速めることが可能となり、これによって全体的
な汚水の循環速度が速くとも沈澱を有効に防止すること
ができるという優れた効果を奏する。As explained above, according to the sewage treatment apparatus according to the present invention, the material returned from the sedimentation tank is injected at the bottom in the inner circumferential direction near the opposite side of the surface agitation tank with respect to the center of the aeration tank. It is possible to increase the circulation speed of the wastewater at the position where sludge stagnation is most likely to occur, and this provides an excellent effect in that sedimentation can be effectively prevented even if the overall circulation speed of the wastewater is high.
第１図は本発明に係る汚水処理装置の一実施例を示す平
面図、第２図は第１図の■一■線断面図、第３図は従来
の汚水処理装置の一例を示す平面図、第４図は第３図の
Ｆｉｌ’−ＴＶ線断面図である。
５・・・曝気槽、
６・・・表面攪拌装置、
７・・・汚水、
９・・・沈澱池、
１０・・・排泥管、
１２・・・返送汚泥管、
ｌ３・・・返送汚泥ヘッダ、
１４・・・ノズル。
第 ３ 図Fig. 1 is a plan view showing an embodiment of the sewage treatment device according to the present invention, Fig. 2 is a sectional view taken along the line 1-1 in Fig. 1, and Fig. 3 is a plan view showing an example of the conventional sewage treatment device. , FIG. 4 is a sectional view taken along the line Fil'-TV in FIG. 3. 5... Aeration tank, 6... Surface agitation device, 7... Sewage, 9... Sedimentation tank, 10... Sludge removal pipe, 12... Return sludge pipe, 13... Return sludge Header, 14... nozzle. Figure 3
Claims (1)
を設置し、該表面攪拌装置の回動によって、前記曝気槽
に貯留された汚水中に酸素を供給すると共に、汚水を循
環させるよう構成した汚水処理装置において、沈澱池か
らの返送物を、曝気槽の中心に対し表面攪拌槽の反対側
付近の内周方向底部に噴射させるよう構成したことを特
徴とする汚水処理装置。(1) A surface agitation device is installed in the radial direction of a donut-shaped aeration tank, and the rotation of the surface agitation device supplies oxygen to the wastewater stored in the aeration tank and circulates the wastewater. What is claimed is: 1. A sewage treatment device characterized in that said sewage treatment device is configured to inject the returned material from the settling tank to the bottom in the inner circumferential direction near the opposite side of the surface agitation tank with respect to the center of the aeration tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1150277A JPH0710395B2 (en) | 1989-06-12 | 1989-06-12 | Sewage treatment equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1150277A JPH0710395B2 (en) | 1989-06-12 | 1989-06-12 | Sewage treatment equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0316697A true JPH0316697A (en) | 1991-01-24 |
| JPH0710395B2 JPH0710395B2 (en) | 1995-02-08 |
Family
ID=15493450
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1150277A Expired - Fee Related JPH0710395B2 (en) | 1989-06-12 | 1989-06-12 | Sewage treatment equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0710395B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000215982A (en) * | 1999-01-25 | 2000-08-04 | Matsushita Electric Ind Co Ltd | Display device |
| CN108516616A (en) * | 2018-05-30 | 2018-09-11 | 四川奥恒环保科技有限公司 | A kind of aerobic tank for preventing sludge from accumulating |
-
1989
- 1989-06-12 JP JP1150277A patent/JPH0710395B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000215982A (en) * | 1999-01-25 | 2000-08-04 | Matsushita Electric Ind Co Ltd | Display device |
| CN108516616A (en) * | 2018-05-30 | 2018-09-11 | 四川奥恒环保科技有限公司 | A kind of aerobic tank for preventing sludge from accumulating |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0710395B2 (en) | 1995-02-08 |
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