JPH10165978A - Intermittent aeration tank and intermittent aeration tank built-in type waste water treatment apparatus - Google Patents
Intermittent aeration tank and intermittent aeration tank built-in type waste water treatment apparatusInfo
- Publication number
- JPH10165978A JPH10165978A JP8328070A JP32807096A JPH10165978A JP H10165978 A JPH10165978 A JP H10165978A JP 8328070 A JP8328070 A JP 8328070A JP 32807096 A JP32807096 A JP 32807096A JP H10165978 A JPH10165978 A JP H10165978A
- Authority
- JP
- Japan
- Prior art keywords
- tank
- intermittent aeration
- aeration tank
- intermittent
- water treatment
- 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
- 238000005273 aeration Methods 0.000 title claims abstract description 49
- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000010865 sewage Substances 0.000 claims abstract description 8
- 238000001914 filtration Methods 0.000 claims description 3
- 238000004062 sedimentation Methods 0.000 claims description 3
- 238000004659 sterilization and disinfection Methods 0.000 claims description 3
- 238000013019 agitation Methods 0.000 claims description 2
- 238000003756 stirring Methods 0.000 abstract description 13
- 238000009792 diffusion process Methods 0.000 abstract description 3
- 238000005299 abrasion Methods 0.000 abstract 1
- 239000010802 sludge Substances 0.000 description 14
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- JVMRPSJZNHXORP-UHFFFAOYSA-N ON=O.ON=O.ON=O.N Chemical compound ON=O.ON=O.ON=O.N JVMRPSJZNHXORP-UHFFFAOYSA-N 0.000 description 2
- 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 2
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 125000001477 organic nitrogen group Chemical group 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000033116 oxidation-reduction process Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005303 weighing 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
- Treatment Of Biological Wastes In General (AREA)
- Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ばっ気と撹拌を繰
り返すことにより生物化学的酸素要求量（以下ＢＯＤと
いう）の低減及び窒素の除去を行なう間欠ばっ気槽及び
該間欠ばっ気槽内蔵型排水処理装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intermittent aeration tank for reducing biochemical oxygen demand (hereinafter referred to as "BOD") and removing nitrogen by repeating aeration and stirring, and a built-in intermittent aeration tank. The present invention relates to a wastewater treatment device.
【０００２】[0002]
【従来の技術】汚水を浄化する方法の１つとして、間欠
ばっ気槽を使用するやり方は、古くから行なわれている
ことであり、その仕組みを説明すると以下のようにな
る。即ち従来の間欠ばっ気槽は、円筒横置型槽の長手方
向中央部両側に仕切板を取付け、該仕切板によって区切
られた空間上部にばっ気及び撹拌を行なう機械式ばっ気
撹拌装置を対角線上に並ぶように２台設置しているもの
であり、前記機械式ばっ気撹拌装置は、先端のスクリュ
ーを高速回転することにより負圧を形成し、空気が中空
シャフトを通して吸い込まれ、前記スクリューによる旋
回流と剪断力により微細気泡化した空気を水中に撹拌、
溶解する構造となっている。2. Description of the Related Art As a method of purifying sewage, a method of using an intermittent aeration tank has been used for a long time, and the mechanism will be described as follows. That is, in the conventional intermittent aeration tank, a partition plate is attached to both sides of the central portion in the longitudinal direction of the cylindrical horizontal type tank, and a mechanical aeration stirrer that performs aeration and stirring in an upper part of the space separated by the partition plate is diagonally arranged. The mechanical aeration stirrer forms a negative pressure by rotating the screw at the tip at a high speed, air is sucked through the hollow shaft, and swirling by the screw is performed. The air that has been microbubbled by the flow and shear force is stirred in water,
It has a structure that dissolves.
【０００３】前述した機械式ばっ気撹拌装置は、ばっ気
時において商用電源の周波数（５０／６０Ｈｚ）にて運
転し、原水中のＢＯＤ低減とアンモニア性窒素及び有機
性窒素の硝化のための酸素を供給し、撹拌時において周
波数を（２５／３０Ｈｚ）に変換して運転し、槽内撹拌
を行ない好気時に生成した硝酸性窒素及び亜硝酸性窒素
の除去を行なうとともにＢＯＤの低減を行なう。[0003] The above-mentioned mechanical aeration stirrer is operated at the frequency of a commercial power supply (50/60 Hz) during aeration to reduce BOD in raw water and oxygen for nitrification of ammonia nitrogen and organic nitrogen. Is supplied, the frequency is changed to (25/30 Hz) during stirring, the operation is carried out, and the nitrate nitrogen and nitrite nitrogen generated during the aerobic period are removed by stirring in the tank, and the BOD is reduced.
【０００４】また、円筒横置型の間欠ばっ気槽の底部の
幅方向中央部に、撹拌用の水中撹拌機を長手方向に水流
を生じさせるように設置すると共に、該水中撹拌機に隣
接するように、活性汚泥に酸素を供給するためのブロワ
に接続された散気管或いは散気筒を設置することもあ
る。[0004] In addition, an underwater stirrer for stirring is installed at the center in the width direction of the bottom of the intermittent aeration tank of a cylindrical horizontal type so as to generate a water flow in the longitudinal direction, and is adjacent to the underwater stirrer. In some cases, an air diffuser or an air diffuser connected to a blower for supplying oxygen to the activated sludge may be provided.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、前述し
た従来技術においては、それぞれに問題がある。機械式
ばっ気撹拌装置を使用する場合には、スクリューを回転
させるモータが気中にあるため、間欠ばっ気槽内の水位
が上昇した際にモータが冠水し故障を起こす原因とな
る。また、水中撹拌機と散気管を隣接して設置した場合
には、ばっ気の気泡が水中撹拌機のプロペラと衝突して
プロペラが摩耗し、ばっ気或いは撹拌が適切に行なわれ
ず、処理水質が悪化したりランニングコストを増加させ
る原因となっている。However, each of the above-mentioned prior arts has its own problems. When using a mechanical aeration apparatus, the motor that rotates the screw is in the air, so that when the water level in the intermittent aeration tank rises, the motor is flooded and causes a failure. Also, when the underwater stirrer and the air diffuser are installed adjacent to each other, the aerated air bubbles collide with the propeller of the underwater stirrer, causing the propeller to wear, and aeration or stirring is not performed properly, and the quality of the treated water becomes poor. It causes deterioration and increases running cost.
【０００６】本発明は、以上のような問題点に鑑み、安
定した処理性能を有する間欠ばっ気槽及び該間欠ばっ気
槽を内蔵する排水処理装置を提供することを目的とす
る。[0006] In view of the above problems, an object of the present invention is to provide an intermittent aeration tank having stable processing performance and a wastewater treatment apparatus incorporating the intermittent aeration tank.
【０００７】[0007]
【課題を解決するための手段】本発明は、図１に示すよ
うに、一方に流入口２を、他方に流出口６を有し、内部
に水中撹拌機５及び散気管４を設け、ばっ気と撹拌を繰
り返すことにより汚水処理を行なう円筒横置型の間欠ば
っ気槽１において、流入口２側の槽底部の幅方向中央部
に水流が流出口６方向に向かうように水中撹拌機５を設
置すると共に、槽底部の幅方向中央部より槽直径の１／
４〜１／６の距離を隔て散気管４を設置したことを特徴
としている。According to the present invention, as shown in FIG. 1, an inflow port 2 is provided on one side, and an outflow port 6 is provided on the other side. In the cylindrical horizontal intermittent aeration tank 1 that performs sewage treatment by repeating air and agitation, the underwater stirrer 5 is arranged such that the water flow is directed toward the outlet 6 at the center in the width direction of the bottom of the tank on the inlet 2 side. At the same time as installing, 1/1 of the tank diameter from the center in the width direction of the tank bottom
The air diffusion tube 4 is installed at a distance of 4 to 1/6.
【０００８】[0008]
【発明の実施の形態】本発明で用いる水中撹拌機５の設
置場所は、流出口６に比べ流入口２に近い間欠ばっ気槽
１底部の幅方向略中央であり、これは、間欠ばっ気槽全
体を効率良く撹拌するのに好適な場所となっている。一
方、散気管４の設置場所は、槽１底部の幅方向中央部よ
り槽１直径の１／４〜１／６の距離を隔てる必要が有
る。これは、１／６より短い距離に設置すると散気管か
ら放出される気泡が水中撹拌機５のプロペラに直接当た
ることが多くなってしまい、１／４より長い距離に設置
すると間欠ばっ気槽１内に旋回流を生じさせることが困
難になるためである。BEST MODE FOR CARRYING OUT THE INVENTION The underwater stirrer 5 used in the present invention is installed substantially at the center of the bottom of an intermittent aeration tank 1 closer to an inlet 2 than an outlet 6 in the width direction. This is a suitable place to efficiently stir the entire tank. On the other hand, the installation location of the air diffuser 4 needs to be separated from the center of the bottom of the tank 1 in the width direction by a distance of １ ／ to ６ of the diameter of the tank 1. This is because if installed at a distance shorter than 1/6, air bubbles released from the air diffuser often directly hit the propeller of the underwater stirrer 5, and if installed at a distance longer than 1/4, the intermittent aeration tank 1 This is because it becomes difficult to generate a swirling flow in the inside.
【０００９】本発明で用いる円筒横置型の間欠ばっ気槽
１は、図２に示すように長手方向断面が円形のもの
（ａ）、小判型のもの（ｂ）、隅円四角型のもの（ｃ）
等を適宜使用することが可能であり、円筒とは角がない
との意味合いで円筒との表現をしており、汚水の循環を
円滑に行なうことができる。As shown in FIG. 2, a cylindrical horizontal type intermittent aeration tank 1 used in the present invention has a circular cross section in the longitudinal direction (a), an oval type (b), and a square corner type ( c)
And the like can be used as appropriate, and the term “cylinder” is used to mean that there is no corner with the cylinder, so that the wastewater can be smoothly circulated.
【００１０】[0010]
【実施例】以下、本発明の実施例について図面に沿って
説明する。図１は、本発明の間欠ばっ気槽１を水平面に
て切断した様子を示す断面図であり、流入口２及び流出
口６とを結ぶ幅方向中心線上であり、且つ流入口２側に
水中撹拌装置５を設置している。散気管４は、前記幅方
向中心線から４７５ｍｍ離れた場所に長手方向に沿って
直線上に設置している。尚、本実施例の間欠ばっ気槽１
の幅方向は２５００ｍｍとしている。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing a state in which an intermittent aeration tank 1 of the present invention is cut along a horizontal plane, and is on a center line in a width direction connecting an inflow port 2 and an outflow port 6, and is provided with an underwater on the inflow port 2 side. A stirring device 5 is provided. The air diffuser 4 is installed on a straight line along the longitudinal direction at a position 475 mm away from the center line in the width direction. The intermittent aeration tank 1 of the present embodiment
Is 2500 mm in the width direction.
【００１１】流入口２から間欠ばっ気槽１に流入した原
水は、返送汚泥流入管３から流入する活性汚泥と混合さ
れ、ばっ気と撹拌が繰り返されることにより浄化され
る。ばっ気運転時には、ブロワーに接続された散気管４
から空気中の酸素が供給され、原水中のＢＯＤ低減とア
ンモニア性窒素及び有機性窒素の硝化を行ない、撹拌運
転時には、水中撹拌機５により間欠ばっ気槽５の長手方
向に水流が生じ、活性汚泥が充分に撹拌され、ばっ気運
転時に生成した硝酸性窒素及び亜硝酸性窒素の脱窒素が
行なわれると共にＢＯＤの低減も行なわれる。処理され
た処理水は、流出口６を経て次ぎの処理工程へと移流す
る。The raw water flowing from the inflow port 2 into the intermittent aeration tank 1 is mixed with the activated sludge flowing from the return sludge inflow pipe 3 and purified by repeating aeration and stirring. During aeration operation, the diffuser 4 connected to the blower
From the air to reduce the BOD in the raw water and nitrify the ammonia nitrogen and organic nitrogen. During the stirring operation, a water flow is generated in the longitudinal direction of the intermittent aeration tank 5 by the underwater stirrer 5 to activate the water. The sludge is sufficiently stirred, the nitrate nitrogen and nitrite nitrogen generated during the aeration operation are denitrified, and the BOD is reduced. The treated water flows through the outlet 6 to the next treatment step.
【００１２】水中撹拌機５の撹拌時間及び開始時間は、
一般的にはタイマーにより設定されるが、その他にもＤ
Ｏセンサー（溶存酸素量の測定）、ｐＨセンサー、ＯＲ
Ｐセンサー（酸化還元電位の測定）による信号を利用す
ることによりマイコン制御させても良い。The stirring time and start time of the underwater stirrer 5 are as follows:
Generally, it is set by a timer.
O sensor (measurement of dissolved oxygen amount), pH sensor, OR
Microcomputer control may be performed by using a signal from a P sensor (measurement of oxidation-reduction potential).
【００１３】図３は、本発明の間欠ばっ気槽を内部に組
み込んだ排水処理装置の断面図を示している。排水処理
装置の一端に設けられた流入口２から流入した汚水は、
ばっ気型スクリーン７により汚水中の夾雑物及び粗大な
固形物等が除去され、流量調整槽８に流入する。流量調
整槽８内の汚水は、流量調整ポンプ９により計量マス１
０に移流され、計画汚水量に流量調整された後に、微細
目スクリーン１１にて微細な夾雑物及び固形物を除去
し、原水として間欠ばっ気槽１に流入する。前述した微
細目スクリーン１１にて除去された物質は、汚泥濃縮貯
留槽１２又は汚泥貯留槽に貯留される。FIG. 3 is a sectional view of a wastewater treatment apparatus in which the intermittent aeration tank of the present invention is incorporated. The sewage flowing from the inlet 2 provided at one end of the wastewater treatment device is
Impurities and coarse solids in the wastewater are removed by the aeration screen 7 and flow into the flow control tank 8. The sewage in the flow control tank 8 is measured by the flow control pump 9 to measure
After the flow rate is adjusted to 0 and the flow rate is adjusted to the planned amount of sewage, fine impurities and solids are removed by the fine mesh screen 11 and the raw water flows into the intermittent aeration tank 1. The substance removed by the fine-grain screen 11 is stored in the sludge concentration storage tank 12 or the sludge storage tank.
【００１４】間欠ばっ気槽１に流入した原水は、返送汚
泥流入管３から流入する活性汚泥と混合され、ばっ気及
び撹拌工程を経て浄化される。浄化された処理水は、沈
殿槽１３を通過して生物濾過槽１４へ流入し、最終的な
濾過をされ消毒槽１８にて消毒の後放流ポンプ２０によ
り系外へ放流される。尚、返送汚泥流入管３の汚泥は、
前記沈殿槽１３の底部から沈殿した汚泥をエアリフトポ
ンプ１５により引上げて使用される。The raw water flowing into the intermittent aeration tank 1 is mixed with the activated sludge flowing from the return sludge inflow pipe 3 and purified through the aeration and stirring steps. The purified treated water flows into the biological filtration tank 14 through the sedimentation tank 13, is finally filtered, is disinfected in the disinfection tank 18, and is discharged out of the system by the discharge pump 20. In addition, the sludge of the return sludge inflow pipe 3 is
The sludge settled from the bottom of the settling tank 13 is pulled up by an air lift pump 15 and used.
【００１５】[0015]
【発明の効果】以上説明したとおり、本発明によれば、
水中撹拌機と散気管を所定間隔を隔てて設置したため
に、散気管から放出される気泡が直接水中撹拌機のプロ
ペラに衝突することがなく、水中撹拌機の故障及び撹拌
装置のプロペラ摩耗等を低減することが可能であり、安
定した処理水を得ることができる間欠ばっ気槽を提供す
ることができる。また、前記間欠ばっ気槽を排水処理装
置に内蔵させることにより、ランニングコストが低く、
安定した汚水処理を行なうことができる排水処理装置と
することが可能となる。As described above, according to the present invention,
Since the underwater stirrer and the air diffuser are installed at a predetermined interval, the air bubbles released from the air diffuser do not directly collide with the propeller of the underwater stirrer. It is possible to provide an intermittent aeration tank that can reduce the amount of water and can obtain stable treated water. In addition, by incorporating the intermittent aeration tank in the wastewater treatment device, running costs are low,
A wastewater treatment device capable of performing stable sewage treatment can be provided.
【図１】本発明の実施例である間欠ばっ気槽の水平方向
断面図である。FIG. 1 is a horizontal sectional view of an intermittent aeration tank according to an embodiment of the present invention.
【図２】本発明の間欠ばっ気槽の長手方向断面図を示し
たものであり、（ａ）は円形、（ｂ）は小判型、（ｃ）
は隅円四角型を示す。FIG. 2 is a longitudinal sectional view of the intermittent aeration tank of the present invention, wherein (a) is a circle, (b) is an oval type, and (c).
Indicates a square-corner type.
【図３】本発明の間欠ばっ気槽を内蔵した排水処理装置
の断面図を示す。FIG. 3 is a sectional view of a wastewater treatment apparatus having a built-in intermittent aeration tank according to the present invention.
１．間欠ばっ気槽 ２．流入口 ３．返送汚泥流入管
４．散気管 ５．水中撹拌機 ６．流出口 ７．ばっ気
型スクリーン ８．流量調整槽 ９．流量調整ポンプ
１０．計量マス １１．微細目スクリーン １２．汚泥
濃縮貯留槽 １３．沈殿槽 １４．生物濾過層 １５．
エアリフトポンプ １６．汚泥マス １７．エアリフト
ポンプ １８．消毒槽 １９．放流ポンプ槽 ２０．放
流ポンプ1. 1. Intermittent aeration tank Inlet 3. Return sludge inflow pipe
4. Air diffuser 5. Underwater stirrer 6. Outlet 7. 7. Aerated screen Flow control tank 9. Flow control pump
10. Weighing mass 11. Fine screen 12. Sludge concentration storage tank 13. Sedimentation tank 14. Biological filtration layer 15.
Air lift pump 16. Sludge mass 17. Air lift pump 18. Disinfection tank 19. Discharge pump tank 20. Discharge pump
Claims (2)
内部に水中撹拌機及び散気管を設け、ばっ気と撹拌を繰
り返すことにより汚水処理を行なう円筒横置型の間欠ば
っ気槽において、流入口側の槽底部の幅方向中央部に水
流が流出口方向に向かうように水中撹拌機を設置すると
共に、槽底部の幅方向中央部より槽直径の１／４〜１／
６の距離を隔て散気管を設置したことを特徴とする間欠
ばっ気槽。Claims: 1. An inflow port on one side and an outflow port on the other,
A submerged stirrer and a diffuser tube are provided inside, and in a cylindrical horizontal intermittent aeration tank that performs sewage treatment by repeating aeration and agitation, the water flow is directed toward the outlet at the center in the width direction at the bottom of the tank on the inlet side. The underwater stirrer is installed so as to face the tank, and from the center in the width direction at the bottom of the tank, 1/4 to 1 /
6. An intermittent aeration tank characterized by installing an air diffuser at a distance of 6.
沈殿槽、生物濾過槽、消毒槽を有した排水処理装置であ
って、前記間欠ばっ気槽が請求項１に記載された間欠ば
っ気槽であることを特徴とする間欠ばっ気槽内蔵型排水
処理装置。2. At least a flow control tank, an intermittent aeration tank,
A wastewater treatment apparatus having a sedimentation tank, a biological filtration tank, and a disinfection tank, wherein the intermittent aeration tank is the intermittent aeration tank according to claim 1. Processing equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32807096A JP3642372B2 (en) | 1996-12-09 | 1996-12-09 | Intermittent aeration tank and waste water treatment equipment with built-in intermittent aeration tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32807096A JP3642372B2 (en) | 1996-12-09 | 1996-12-09 | Intermittent aeration tank and waste water treatment equipment with built-in intermittent aeration tank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10165978A true JPH10165978A (en) | 1998-06-23 |
| JP3642372B2 JP3642372B2 (en) | 2005-04-27 |
Family
ID=18206185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32807096A Expired - Lifetime JP3642372B2 (en) | 1996-12-09 | 1996-12-09 | Intermittent aeration tank and waste water treatment equipment with built-in intermittent aeration tank |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3642372B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100984320B1 (en) | 2008-04-28 | 2010-09-30 | (주)범한엔지니어링 종합건축사 사무소 | Riverside Filtration Treatment System Using Well Aeration Tank |
| WO2024193117A1 (en) * | 2023-03-22 | 2024-09-26 | 海南立昇净水科技实业有限公司 | Aerator, and submerged membrane assembly and submerged membrane filtration device including same |
| CN120272303A (en) * | 2025-03-11 | 2025-07-08 | 河南飞天生物科技股份有限公司 | Maltodextrin waste residue treatment device and method |
-
1996
- 1996-12-09 JP JP32807096A patent/JP3642372B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100984320B1 (en) | 2008-04-28 | 2010-09-30 | (주)범한엔지니어링 종합건축사 사무소 | Riverside Filtration Treatment System Using Well Aeration Tank |
| WO2024193117A1 (en) * | 2023-03-22 | 2024-09-26 | 海南立昇净水科技实业有限公司 | Aerator, and submerged membrane assembly and submerged membrane filtration device including same |
| CN120272303A (en) * | 2025-03-11 | 2025-07-08 | 河南飞天生物科技股份有限公司 | Maltodextrin waste residue treatment device and method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3642372B2 (en) | 2005-04-27 |
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