JPS6268590A - Aeration apparatus for preventing spoilage of building drain tank - Google Patents

Aeration apparatus for preventing spoilage of building drain tank

Info

Publication number
JPS6268590A
JPS6268590A JP60209575A JP20957585A JPS6268590A JP S6268590 A JPS6268590 A JP S6268590A JP 60209575 A JP60209575 A JP 60209575A JP 20957585 A JP20957585 A JP 20957585A JP S6268590 A JPS6268590 A JP S6268590A
Authority
JP
Japan
Prior art keywords
water
draft tube
stirring blade
tank
air
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
Application number
JP60209575A
Other languages
Japanese (ja)
Other versions
JPH0456680B2 (en
Inventor
Koichi Mizuta
耕市 水田
Hidemi Osagawa
秀実 長川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Kiden Kogyo Ltd
Original Assignee
Hitachi Kiden Kogyo Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Kiden Kogyo Ltd filed Critical Hitachi Kiden Kogyo Ltd
Priority to JP60209575A priority Critical patent/JPS6268590A/en
Priority to KR1019860007850A priority patent/KR940004632B1/en
Publication of JPS6268590A publication Critical patent/JPS6268590A/en
Publication of JPH0456680B2 publication Critical patent/JPH0456680B2/ja
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/233—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
    • B01F23/2332—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements the stirrer rotating about a horizontal axis; Stirrers therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/233—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
    • B01F23/2334—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements provided with stationary guiding means surrounding at least partially the stirrer
    • B01F23/23341—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements provided with stationary guiding means surrounding at least partially the stirrer with tubes surrounding the stirrer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/233—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
    • B01F23/2335—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the direction of introduction of the gas relative to the stirrer
    • B01F23/23354—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the direction of introduction of the gas relative to the stirrer the gas being driven away from the rotating stirrer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/233—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
    • B01F23/2336—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the location of the place of introduction of the gas relative to the stirrer
    • B01F23/23366—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the location of the place of introduction of the gas relative to the stirrer the gas being introduced in front of the stirrer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/25—Mixers with both stirrer and drive unit submerged in the material being mixed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/114—Helically shaped stirrers, i.e. stirrers comprising a helically shaped band or helically shaped band sections
    • B01F27/1144—Helically shaped stirrers, i.e. stirrers comprising a helically shaped band or helically shaped band sections with a plurality of blades following a helical path on a shaft or a blade support
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Activated Sludge Processes (AREA)
  • Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
  • Removal Of Floating Material (AREA)

Abstract

PURPOSE:To prevent anaerobic spoilage, by providing a stirring blade in the draft tube arranged so as to be sunk under the water and providing an air blow-in pipe. CONSTITUTION:When a submerged motor 4 is driven, a stirring blade 5 is revolved to stir the drained water in a tank. Hereupon, negative pressure generates in the water at the leading end part of the blade 5 and air is blown in water from the open air through an air blow-in pipe 7 to be mixed with water and pushed out to the front direction of a draft tube 6. By this method, the aerobic fermentation of the org. substance in drained water is promoted. The upper opening surface of the draft tube 6 is positioned under the surface of water so s to be directed upwardly and the scum 8 suspended in the vicinity of the surface of water is made to flow in the draft tube 6 and broken by the stirring blade 5. By this method, the generation of a malodor can be prevented.

Description

【発明の詳細な説明】 産業上の利用分野 本発明はビル排水槽の腐敗防止用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 for preventing spoilage of building drainage tanks.

従来の技術とそのｒ４題点 地下部分に生活あるいは商業空間を有するビルその他の
建造物に於て、該ビル等内で生じる雑排水は一般的にビ
ル等の最深部に設けた排水槽に一旦自然流下により集め
、排水ポンプにて公共下水道へ排水している０これは公
共下水道よりもビル用排水槽が低い位置に設けられるた
めである。Conventional technology and its r4 issues In buildings and other structures that have living or commercial spaces underground, gray water generated within the building is generally drained once to a drainage tank installed at the deepest part of the building. It is collected by gravity and drained into the public sewer system using a drainage pump. This is because building drainage tanks are installed at lower positions than the public sewer system.

勿論このビル内の排水が直接公共下水道へ排水できるな
らばビル用雑水槽や貯留槽は設けなくてもよい。Of course, if the waste water inside the building can be drained directly to the public sewer system, there is no need to provide a gray water tank or a storage tank for the building.

このようなビル排水槽内にはビル内に生じる雑排水が流
入し、貯留されるため、排水とともに有機物が流入しこ
れが槽内に貯留される時、嫌気性腐敗し、悪臭を発する
ことがしばしばある。このためブロアを設置して排水槽
から生じる悪臭成分を大気中へ強制排気する方法が試み
られているが流入水および排出水量により液位変動が生
じる結果、液面のピストン効果によってプロアによる排
出機能が阻害され、充分な効果をあげることができなか
った。Gray water generated within the building flows into these building drainage tanks and is stored there, so when organic matter flows in with the wastewater and is stored in the tank, it often rots anaerobically and produces a foul odor. be. For this reason, attempts have been made to install a blower to forcibly exhaust the malodorous components generated from the drainage tank into the atmosphere, but as a result, the liquid level fluctuates due to the amount of inflow and discharge water, and the piston effect of the liquid level causes the discharge by a proa. was inhibited and could not produce sufficient effects.

本発明は排水槽の液位が変動しても常に槽内へ空気を吹
き込み曝気を行なって有機物の嫌気性腐敗を未然に防止
することを目的とする。The present invention aims to prevent anaerobic decay of organic matter by constantly blowing air into the tank for aeration even if the liquid level in the tank fluctuates.

問題点の解決手段 ビル用排水槽の槽底に水中モータにて駆動される攪拌羽
根をドラフトチューブ内に配設し、かつこの攪拌羽根の
先端部分に開口する空気吹込管を設け、攪拌羽根の駆動
にて液中に発生する負圧を利用して空気を吹込管を経て
吸入し、液面附近に浮遊するスカムをドラフトチューブ
内へ流入せしめて前記羽根にて破砕と同時に排水の攪拌
・曝気を行なわしめる。Solution to the problem: A stirring blade driven by a submersible motor is installed in a draft tube at the bottom of a building drainage tank, and an air blowing pipe is provided at the tip of the stirring blade to prevent the stirring blade from moving. Using the negative pressure generated in the liquid by driving, air is sucked in through the blowing pipe, and the scum floating near the liquid surface is forced to flow into the draft tube, and the scum is shredded by the vanes and at the same time, the wastewater is stirred and aerated. to be carried out.

実施例 以下本発明を図面に示す実施例にもとづいて説明する。Example The present invention will be described below based on embodiments shown in the drawings.

図に於て１はビルの最通階層に所要容積を有するように
設けた排水槽で、この排水槽ｌの槽底２の所望位置に曝
気装置３を設置する。この曝気装置３は水中モータ（又
は油圧モータ）４と、攪拌羽根５と、ドラフトチューブ
６と空気吹込管７とより成る。水中モータ４は槽底に固
定されると共にこの水中モータ４に上端６ａがラッパ状
に拡開し、下部６１：Ｉは槽底に沿うようにＬ字形に屈
曲したドラフトチューブ６を一体に設け・このドラ７ト
チユーブ内に前記モータにて駆動される攪拌羽根５を設
ける。そしてこのドラフトチューブ６には空気吹込管７
を突設する。この空気吹込管７の上地は水位が変動して
も常に大気中に開口するようにしてしかも所要の空気量
が液中に吠き込まれるようにした径を有するバイブであ
って、その下端開口面を攪拌羽根７の回動にて液中に発
生する負圧ゾーン内に位置するようになす。In the figure, reference numeral 1 denotes a drainage tank provided to have a required volume in the open floor of a building, and an aeration device 3 is installed at a desired position on the bottom 2 of this drainage tank 1. This aeration device 3 consists of a submersible motor (or hydraulic motor) 4, stirring blades 5, a draft tube 6, and an air blowing pipe 7. The submersible motor 4 is fixed to the tank bottom, and the upper end 6a of the submersible motor 4 is expanded in a trumpet shape, and the lower part 61:I is integrally provided with a draft tube 6 bent in an L-shape along the tank bottom. A stirring blade 5 driven by the motor is provided inside the drum 7 tube. And this draft tube 6 has an air blowing pipe 7.
to protrude. The upper part of this air blowing pipe 7 is a vibrator with a diameter that is always open to the atmosphere even if the water level fluctuates, and the required amount of air is injected into the liquid. The opening surface is positioned within a negative pressure zone generated in the liquid by rotation of the stirring blade 7.

而して上述の如く構成する装置に於て、水中モータ４ｔ
−駆動すると攪拌羽根５が回動し〜槽内の排水を攪拌す
る。これによりこの羽根先端部分の液中に負圧が発生す
る。この負圧にて空気吹込管７にで大気中より空気が液
中に吹き込まれると共にドラフトチューブ内の液の攪拌
流とともに混合され、ドラフトチューブ前方向へ押し出
される。Therefore, in the device configured as described above, the underwater motor 4t
- When driven, the stirring blade 5 rotates and stirs the waste water in the tank. This generates negative pressure in the liquid at the tip of the blade. At this negative pressure, air is blown into the liquid from the atmosphere through the air blowing pipe 7, mixed with the stirring flow of the liquid in the draft tube, and pushed out toward the front of the draft tube.

この液中への空気吹き込みにより排水中の有機物の好気
性発酵を促進するものとなる。これは嫌気性発酵を防ぎ
、悪臭発生を抑制されるものとなる。By blowing air into the liquid, aerobic fermentation of organic matter in the waste water is promoted. This prevents anaerobic fermentation and suppresses the generation of bad odors.

さらにこのドラフトチューブ６の上部開口面は液面下に
於て上向きに位置しているため液面附近に浮遊している
スカム８は攪拌羽根の駆動にてドラフトチューブ内へ流
入される排水とともに該チューブ内へ流入され、前記攪
拌羽根によって破砕される。従って水中に配設される曝
気装置にて排水槽内の攪拌と曝気とさらには浮遊スカム
の破砕も同時に行なわれるものである。Furthermore, since the upper opening surface of the draft tube 6 is located below the liquid level and upward, the scum 8 floating near the liquid level is absorbed together with the waste water flowing into the draft tube by the stirring blade. It flows into the tube and is crushed by the stirring blade. Therefore, the aeration device installed underwater simultaneously performs stirring and aeration in the drainage tank, as well as crushing the floating scum.

次に本発明の水中曝気装ａを用いた場合と、何も用いず
放置した場合の結果を比較すると次の通りである。Next, a comparison of the results when using the underwater aeration system a of the present invention and when leaving it alone without using anything is as follows.

Ａ、試験内容 １　臭気測定 悪臭４物質（ＨｚＳ、　ＭＭ、　ＤＭＳ、　ＤＭＤＳ）
について測定した。A. Test content 1 Odor measurement 4 malodor substances (HzS, MM, DMS, DMDS)
were measured.

２　水処理性能 （１）　　曝気前 ＢＯＤ、　ＣＯＤ、　ＳＳ、　Ｔ−Ｎ、　ＰＯ４−Ｐ（
２曝気後 ＢＯＤ、　（＋ＯＤ、　３Ｂ、　Ｔ−Ｎ、　ＰＯ４−Ｐ
３　騒音・振動 曝気装置による騒音・振動を測定した。2 Water treatment performance (1) BOD, COD, SS, T-N, PO4-P (
2 BOD after aeration, (+OD, 3B, TN, PO4-P
3 Noise and Vibration Noise and vibration caused by the aeration equipment were measured.

Ｂ、試験結果 （１）　　臭気測定の結果を第２図に示す。B. Test results (1) The results of odor measurement are shown in Figure 2.

曝気装置を用いることにより、硫化水素（Ｈ２Ｓ）は１
１５に、−メチルメルカプタン（、ＭＭ）は１／２００
０に硫化メチル（ＤＭＳ）は１／４に、二硫化メチル（
ＤＭＤＳ）は１Ａ、８に減少した。By using an aeration device, hydrogen sulfide (H2S) can be reduced to 1
15, -methyl mercaptan (, MM) is 1/200
0 methyl sulfide (DMS) is 1/4 methyl disulfide (DMS)
DMDS) decreased to 1A, 8.

通常であれば、９／１３の清掃前の値に近づいているは
ずであり、顕著な曝気効果が認められた。Normally, the value would have been close to the value before the cleaning on September 13th, and a significant aeration effect was observed.

（２水質測定の結果を第３図に示す。(Figure 3 shows the results of water quality measurement.

水質は曝気を行ってもほとんど変化がなかった。There was almost no change in water quality even after aeration.

（３）　　騒音は、６９〜７４ｄＥ（Ａ）でありほとん
ど問題なかった。(3) Noise was 69 to 74 dE(A), which was almost no problem.

（４）振動は、５〜１０μ島でありほとんど間層なかっ
た。(4) The vibration was 5 to 10 microns, with almost no interlayer.

尚、本発明は上記実施例の他、槽の形状によってはドラ
フトチューブ（案内管）を設ける必要のない場合も生ず
る。In addition to the above-described embodiments, the present invention may not require a draft tube (guide tube) depending on the shape of the tank.

発明の効果 本発明による時はビル排水槽内にしかも水中に没するよ
うにして配設したドラフトチューブ内に攪拌羽根を設け
、かつこの攪拌羽根の駆動によって生じる液中の負圧内
へ空気を吹き込む空気吹込管を設けているため、攪拌羽
根の駆動によって自然に空気が液中へ吹き込まれて所望
の攪拌と曝気が行え、悪臭の発生を防止できる。またド
ラフトチューブの上部開口面を液面下で上向きとしてい
るため液面附近に浮遊するスカムを吸い込み、前記羽根
で破砕できる利点もある。Effects of the Invention According to the present invention, an agitating blade is provided in a draft tube disposed in a building drainage tank so as to be submerged in water, and air is introduced into the negative pressure in the liquid generated by the driving of this agitating blade. Since an air blowing pipe is provided, air is naturally blown into the liquid by driving the stirring blade, allowing desired stirring and aeration to be performed and preventing the generation of bad odors. Furthermore, since the upper opening of the draft tube is directed upward below the liquid surface, there is an advantage that scum floating near the liquid surface can be sucked in and crushed by the blades.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は断面図、第２図は臭気測定のグラフ図、第３図
は水質測定のグラフ図である。 １は排水槽、２は槽底、３は曝気装置、４は水中モータ
、５は攪拌羽根、６はドラフトチューブ、７は空気吹込
管、８はスカム。 特許出願人　　　日立機電工業株式会社代　　理　　人
　　　　池　　　１）　　萬　喜生外１名FIG. 1 is a sectional view, FIG. 2 is a graph of odor measurement, and FIG. 3 is a graph of water quality measurement. 1 is a drainage tank, 2 is a tank bottom, 3 is an aeration device, 4 is a submersible motor, 5 is a stirring blade, 6 is a draft tube, 7 is an air blowing pipe, and 8 is a scum. Patent applicant: Hitachi Kiden Kogyo Co., Ltd. Agent: Ike 1) Yoshio Yomo and one other person

Claims (1)

【特許請求の範囲】[Claims] ビル排水槽内の水中に没する曝気装置であって、槽底に
設置される水中モータにドラフトチューブを突設し、か
つこのドラフトチューブ内に攪拌羽根と、攪拌羽根の駆
動により生じる負圧を利用して空気を吸入する空気吹込
管とを設けると共にこのドラフトチューブの上部開口を
液面下として浮遊スカムをチューブ内に吸い込むように
なしたビル排水槽の腐敗防止用曝気装置。This is an aeration device that is submerged in water in a building drainage tank, and has a draft tube protruding from a submersible motor installed at the bottom of the tank, and a stirring blade inside the draft tube, which generates negative pressure by driving the stirring blade. This aeration device for preventing rot in a building drainage tank is provided with an air blowing pipe for sucking air using the draft tube, and the upper opening of the draft tube is set below the liquid level so that floating scum is sucked into the tube.
JP60209575A 1985-09-20 1985-09-20 Aeration apparatus for preventing spoilage of building drain tank Granted JPS6268590A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP60209575A JPS6268590A (en) 1985-09-20 1985-09-20 Aeration apparatus for preventing spoilage of building drain tank
KR1019860007850A KR940004632B1 (en) 1985-09-20 1986-09-17 Apparatus for aeration in drain tank

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60209575A JPS6268590A (en) 1985-09-20 1985-09-20 Aeration apparatus for preventing spoilage of building drain tank

Publications (2)

Publication Number Publication Date
JPS6268590A true JPS6268590A (en) 1987-03-28
JPH0456680B2 JPH0456680B2 (en) 1992-09-09

Family

ID=16575103

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60209575A Granted JPS6268590A (en) 1985-09-20 1985-09-20 Aeration apparatus for preventing spoilage of building drain tank

Country Status (1)

Country Link
JP (1) JPS6268590A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62129954U (en) * 1986-02-12 1987-08-17
JPS63233522A (en) * 1987-03-23 1988-09-29 Agency Of Ind Science & Technol Channeling ion implantation
JPS63189396U (en) * 1987-05-28 1988-12-06
JPH01218679A (en) * 1988-02-26 1989-08-31 Hitachi Kiden Kogyo Ltd Method for preventing generation of scum and bad odor
JPH01218678A (en) * 1988-02-26 1989-08-31 Hitachi Kiden Kogyo Ltd Method for preventing generation of scum
JPH02121196U (en) * 1989-03-13 1990-10-01
JPH03270798A (en) * 1990-03-20 1991-12-02 Hitachi Kiden Kogyo Ltd Water area purifying apparatus
EP1151786A4 (en) * 1999-01-14 2004-06-09 Kenichi Imako Gas-liquid mixing device
JP2007319787A (en) * 2006-06-01 2007-12-13 Asahi Organic Chem Ind Co Ltd Method and apparatus for treating insoluble substance-containing waste water

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62129954U (en) * 1986-02-12 1987-08-17
JPS63233522A (en) * 1987-03-23 1988-09-29 Agency Of Ind Science & Technol Channeling ion implantation
JPS63189396U (en) * 1987-05-28 1988-12-06
JPH01218679A (en) * 1988-02-26 1989-08-31 Hitachi Kiden Kogyo Ltd Method for preventing generation of scum and bad odor
JPH01218678A (en) * 1988-02-26 1989-08-31 Hitachi Kiden Kogyo Ltd Method for preventing generation of scum
JPH02121196U (en) * 1989-03-13 1990-10-01
JPH03270798A (en) * 1990-03-20 1991-12-02 Hitachi Kiden Kogyo Ltd Water area purifying apparatus
EP1151786A4 (en) * 1999-01-14 2004-06-09 Kenichi Imako Gas-liquid mixing device
JP2007319787A (en) * 2006-06-01 2007-12-13 Asahi Organic Chem Ind Co Ltd Method and apparatus for treating insoluble substance-containing waste water

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JPH0456680B2 (en) 1992-09-09

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