JPH10225684A - Water purification device by ozone - Google Patents
Water purification device by ozoneInfo
- Publication number
- JPH10225684A JPH10225684A JP3006397A JP3006397A JPH10225684A JP H10225684 A JPH10225684 A JP H10225684A JP 3006397 A JP3006397 A JP 3006397A JP 3006397 A JP3006397 A JP 3006397A JP H10225684 A JPH10225684 A JP H10225684A
- Authority
- JP
- Japan
- Prior art keywords
- water
- membrane
- membrane filtration
- ozone
- filtration device
- 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
Landscapes
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Physical Water Treatments (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、上下水処理場にお
ける水処理装置に係り、特に被処理水にオゾンや酸素な
どの気体気泡を散気させて、酸化反応を行って有害物質
の除去を行わしめた後に、膜ろ過装置によって残留有害
物質を物理的に除去する方法において、タンク形の膜ろ
過装置を少なくとも２セット設けていづれか一方が逆洗
浄再生工程を行わしめるに好適なオゾン浄水処理装置に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water treatment apparatus for a water treatment plant, and more particularly to a method for removing gaseous substances such as ozone and oxygen by subjecting the water to be treated to an oxidizing reaction. In the method of physically removing residual harmful substances by a membrane filtration device after the operation, at least two sets of tank-type membrane filtration devices are provided, and one of the ozone water purification treatment devices is suitable for performing a backwashing regeneration process. About.
【０００２】[0002]
【従来の技術】従来の上下水処理は、オゾン反応槽で被
処理水に含有する有害物質、例えばフミン酸などの有機
物質などを酸化反応して分解し、オゾン難分解性の残留
有害物質は膜ろ過装置で物理的に除去する組合せによ
り、安全な水あるいは飲料水として供給するプロセスが
公知である。また、廃液処理装置として、特開昭63−93
396 号公報ではオゾン反応の容器の次に中空系膜フィル
ターでろ過することが述べられている。2. Description of the Related Art Conventional water and sewage treatment involves oxidizing and decomposing harmful substances contained in water to be treated, for example, organic substances such as humic acid, in an ozone reaction tank. Processes for supplying safe water or drinking water by a combination of physically removing with a membrane filtration device are known. Further, as a waste liquid treatment device, Japanese Patent Application Laid-Open No. 63-93
Japanese Patent Publication No. 396 describes that filtration is carried out by a hollow membrane filter after an ozone reaction vessel.
【０００３】[0003]
【発明が解決しようとする課題】従来の方法では、オゾ
ン反応槽で酸化分解して、残留の有害物質を極力少なく
して次の膜ろ過装置で物理的に除去する手段において、
処理時間の経過と共に膜ろ過装置が目づまりしてくるの
で、１〜２年毎にろ過膜を新品と交換している為、ラン
ニングコストがかかる欠点があった。In the conventional method, a means for oxidatively decomposing in an ozone reaction tank to minimize residual harmful substances and physically remove the remaining harmful substances in a next membrane filtration device is used.
Since the membrane filtration device becomes clogged with the elapse of the treatment time, the filtration membrane is replaced with a new one every one to two years, so that there is a disadvantage that the running cost is increased.
【０００４】本発明の目的は、ろ過膜の目づまりによる
部品交換を防止してランニングコストを低減したオゾン
浄水処理装置を提供することにある。[0004] It is an object of the present invention to provide an ozone water purification treatment apparatus in which replacement of parts due to clogging of a filtration membrane is prevented and running cost is reduced.
【０００５】[0005]
【課題を解決するための手段】本発明のオゾン浄水処理
装置は、少なくとも２セットの膜ろ過装置を有し、運転
中の膜ろ過装置を一方側に浄水を通過させ、待機中の膜
ろ過装置を通過する通水を逆方向に逆洗水を流し、待機
中の膜ろ過装置の目づまり物質を排出させることによ
り、少なくとも２セットの膜ろ過装置を交互に運転と待
機とに切替えて、目づまり防止を行うことにより、新品
なろ過膜に交換するのを防止したり、延ばしたりしてラ
ンニングコストを低減することにある。The ozone water treatment apparatus of the present invention has at least two sets of membrane filtration apparatuses, and allows the operation of the membrane filtration apparatus to pass purified water to one side, and the standby membrane filtration apparatus. By flowing backwashing water in the reverse direction to the water passing through the filter and discharging the clogging material of the waiting membrane filtration device, at least two sets of the membrane filtration devices are alternately switched between the operation and the standby. An object of the present invention is to prevent running of the filter by replacing it with a new filtration membrane or to extend the length of the filtration membrane to reduce running costs.
【０００６】[0006]
【発明の実施の形態】本発明のオゾン浄水処理装置を図
１乃至図４により説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS An ozone water purification apparatus according to the present invention will be described with reference to FIGS.
【０００７】図１は、本発明の全体構成の説明図であ
る。オゾン処理槽１でオゾン酸化反応した被処理水は、
タンク形の膜ろ過装置２（２Ａ，２Ｂ）で残留有害物質
を除去して浄化水槽３へ供給される。膜ろ過装置２はこ
の実施例では２セットをタンク形の膜ろ過装置２Ａと２
Ｂとを並列に連通しているが、２セット以上使用しても
良い。タンク内にはろ過膜２ｃを装填してある。図１で
は、膜ろ過装置２Ａが入口側から出口側に通水する順方
向状態を示し、膜ろ過装置２Ｂは順方向状態と異なり、
逆方向に通水を行う所謂逆洗浄再生状態を示している。FIG. 1 is an explanatory diagram of the overall configuration of the present invention. The water to be treated after the ozone oxidation reaction in the ozone treatment tank 1 is
The remaining harmful substances are removed by the tank-type membrane filtration device 2 (2A, 2B) and supplied to the purified water tank 3. In this embodiment, two sets of membrane filtration devices 2 are used as tank-type membrane filtration devices 2A and 2A.
Although B is communicated in parallel, two or more sets may be used. A filtration membrane 2c is loaded in the tank. In FIG. 1, the membrane filtration device 2A shows a forward state in which water flows from the inlet side to the exit side, and the membrane filtration device 2B is different from the forward state.
This shows a so-called reverse cleaning and regeneration state in which water flows in the reverse direction.
【０００８】通水側と逆洗浄側との切り分けは、切替弁
４(４ａ〜４ｄ)とが連動して交互切替え動作をさせるの
で、膜ろ過装置２Ａ側へは切替弁４ｃと４ａとを経由し
て通水され、膜ろ過装置２Ｂ側へは切替弁４ｂと４ｄと
を経由して逆洗浄経路をつくる。従って、逆洗浄ユニッ
ト５ではクッションタンク５ａの逆洗浄水をストレーナ
５ｂを経由して逆止弁５ｃからミキサー５ｄを経由し逆
洗浄ポンプ５ｅにより加圧し、切替弁４ｂを開放して膜
ろ過装置２Ｂへ供給し、ろ過膜２ｃの目づまり有害物質
は通水の逆方向より加圧水を受けるので、排出されやす
くなり、粗フィルター７Ｂを経由し、切替弁４ｄ経由し
てクッションタンク５ａの仕切りの左側に入り、ドレン
物質が底部に蓄積されるので、適時にドレン弁５ｆより
排出させて、上側の水は右方へ越流して再利用循環させ
る。ここに、ミキサー５ｄへは洗浄材容器５ｇより混合
液またはガスを供給して、目づまり除去の逆洗浄水を活
性化させて、ろ過膜２ｃ内の有害物質を除去しやすくす
る為のものである。洗浄材容器５ｇ内は活性酵素液やオ
ゾンガスなどを用いる。The separation between the water-flowing side and the back-washing side is performed by alternately switching the valve 4 (4a to 4d) in conjunction with the switching valve 4 (4a to 4d). And a backwash path is made to the membrane filtration device 2B via the switching valves 4b and 4d. Therefore, in the backwash unit 5, the backwash water in the cushion tank 5a is pressurized by the backwash pump 5e from the check valve 5c through the mixer 5d via the strainer 5b, the switching valve 4b is opened, and the membrane filter 2B is opened. And the harmful substances clogged by the filtration membrane 2c receive pressurized water in the reverse direction of the water flow, so that the harmful substances are easily discharged, and pass through the coarse filter 7B, through the switching valve 4d, and on the left side of the partition of the cushion tank 5a. As the drain material enters and accumulates at the bottom, it is discharged from the drain valve 5f in a timely manner, and the water on the upper side overflows to the right and is recycled. Here, a mixed liquid or gas is supplied from the cleaning material container 5g to the mixer 5d to activate the backwashing water for removing clogging, thereby facilitating removal of harmful substances in the filtration membrane 2c. is there. An active enzyme solution, ozone gas, or the like is used in the cleaning material container 5g.
【０００９】又、粗フィルター７Ａと７Ｂとは膜ろ過装
置２Ａと膜ろ過装置２Ｂとの通水入口側に設けて、大き
い径の有害物質を流れないようにするためである。例え
ば、ろ過膜２ｃはＭＦ膜で孔径１〜０.１μｍ ，ＵＦ膜
で孔径０.１〜０.０１μｍ，ＮＦ膜で０.０１〜０.００
１μｍの材料を用いるので、粗フィルターはそれら孔径
より１桁大きい孔径に選ぶと、ろ過膜２ｃの大きい目づ
まりは少なくできる。また、通水方向と逆洗浄水の方向
とが逆方向としているので、粗フィルター７Ｂの付着物
は逆洗浄されやすい。通水時の膜ろ過装置２Ａ、逆洗時
の膜ろ過装置２Ｂの切替工程に伴う切替弁４の制御は逆
洗浄制御部６にて行われる。The coarse filters 7A and 7B are provided on the water inlet side of the membrane filtration devices 2A and 2B so as to prevent harmful substances having a large diameter from flowing. For example, the filtration membrane 2c has a pore size of 1 to 0.1 μm for the MF membrane, 0.1 to 0.01 μm for the UF membrane, and 0.01 to 0.00 μm for the NF membrane.
Since a material of 1 μm is used, if the coarse filter is selected to have a pore diameter one order of magnitude larger than those pore diameters, large clogging of the filtration membrane 2c can be reduced. Further, since the direction of the water flow and the direction of the backwash water are opposite, the deposits on the coarse filter 7B are easily backwashed. The control of the switching valve 4 in the switching process of the membrane filtration device 2A during water passage and the membrane filtration device 2B during backwashing is performed by the backwash control unit 6.
【００１０】図２は、膜ろ過装置２Ｂ内に装填したろ過
膜２Ｃとが通水方向に対し、斜め前方に傾斜をつけて膜
間隔を設けて配置した例で、この場合は逆洗浄ユニット
５の逆洗浄ポンプ５ｅの逆洗浄水は切替弁（Ｓ3)４ｆと
切替弁４ｂとを順次経由して膜ろ過装置２Ｂに与えられ
て、一定時間後に切替弁（Ｓ3)４ｆを閉にし、切替弁
(Ｓ1)４ｅを開にし、切替弁(Ｓ2)４ｇを開とすると、逆
洗浄水はろ過膜２ｃの膜間隔に流れて表面洗浄しクッシ
ョンタンク５ａに排出する。従って、ろ過膜２ｃが平板
状の場合に好適な逆洗浄法となる。FIG. 2 shows an example in which a filtration membrane 2C loaded in a membrane filtration device 2B is disposed obliquely forward with respect to the water flow direction so as to provide a membrane interval. Is supplied to the membrane filtration device 2B via the switching valve (S 3 ) 4f and the switching valve 4b in order, and after a certain time, the switching valve (S 3 ) 4f is closed. Switching valve
When (S 1 ) 4 e is opened and the switching valve (S 2 ) 4 g is opened, the backwash water flows at the interval between the filtration membranes 2 c to wash the surface, and is discharged to the cushion tank 5 a. Therefore, it is a suitable back washing method when the filtration membrane 2c is flat.
【００１１】以上説明の逆洗浄工程は、図３の逆洗浄制
御部６によるタイムシーケンスで説明すると、スタート
(∇印)時は、膜ろ過装置２Ａ側が通水工程時間Ｔ1 で行
われ、膜ろ過装置２Ｂ側が逆洗浄工程時間(斜線マーク)
として行われる。逆洗浄工程においては、逆洗浄ポンプ
(Ｐ)５ｇが運転したのち、切替弁（Ｓ3)４ｆが開して一
定時間Ｔ2経過後に閉とし、次に切替弁(Ｓ1)４ｅと切替
弁（Ｓ2)４ｇとが開して、一定時間Ｔ3 経過後に閉とし
て、逆洗浄ポンプ(Ｐ)５ｇが停止する。ここにＴ1＞(Ｔ
2＋Ｔ3)であり、Ｔ2＝Ｔ3である。The reverse cleaning step described above will be described with reference to the time sequence of the reverse cleaning control unit 6 in FIG.
(∇ mark) when the membrane filtering device 2A side is performed in water passing process time T 1, the membrane filtration unit 2B side backwashing process time (shaded mark)
It is performed as. In the backwash process, the backwash pump
(P) After operation of 5 g, the switching valve (S 3 ) 4 f is opened and closed after a lapse of a predetermined time T 2 , and then the switching valve (S 1 ) 4 e and the switching valve (S 2 ) 4 g are opened. Te, as closed after a predetermined time T 3 has elapsed, backwash pump (P) 5 g stops. Where T 1 > (T
2 + T 3 ) and T 2 = T 3 .
【００１２】次に、膜ろ過装置２Ａ側がＴ1 時間経過す
ると通水工程より逆洗浄工程となり、膜ろ過装置２Ｂ側
が逆洗工程から通水工程と切替るので、以後繰返し動作
を行わしめるので膜ろ過装置２は常に通水状態となる。Next, when the time T 1 has passed on the side of the membrane filtration device 2A, the backwashing process is switched from the water-passing process, and the membrane filtration device 2B is switched from the backwashing process to the water-passing process. The filtration device 2 is always in a water-passing state.
【００１３】図４は、ろ過膜２ｃが中空系膜の例でタン
ク内に超音波振動子８を逆洗浄水の入口側に設けて外部
に超音波発振制御部９を設ける。電源部９ａとスイープ
制御部９ｂと送信部９ｃとより成り、超音波振動子８か
らは水中に０.５〜１５ＭＨz発射させると、縦波は水中
で１４８０ｍ／ｓで伝幡し、ろ過膜２ｃのガラス材とす
ると３,７００ｍ／ｓ で伝幡するので、逆洗浄ポンプ５
ｅ運転で逆洗浄水がかって通水している時は超音波振動
がろ過膜２ｃへ与えられ、付着物質は剥離しやすくな
り、押し出されて排出されやすくなる。切替弁４(４ａ
〜４ｄ)と逆洗浄ユニット５と超音波発振制御部９とは
逆洗浄制御部６により図３に示すタイムシーケンスによ
り指令される。FIG. 4 shows an example in which the filtration membrane 2c is a hollow type membrane. An ultrasonic oscillator 8 is provided in the tank on the inlet side of the backwash water, and an ultrasonic oscillation controller 9 is provided outside. When the ultrasonic vibrator 8 emits 0.5 to 15 MHz into the water, the longitudinal wave propagates at 1480 m / s in the water, and the filter membrane 2c includes the power supply unit 9a, the sweep control unit 9b, and the transmitting unit 9c. If glass material is used, it can be transmitted at 3,700 m / s, so backwash pump 5
When the back washing water is flowing through the e-operation, ultrasonic vibration is applied to the filtration membrane 2c, so that the adhered substances are easily peeled, and are extruded and discharged easily. Switching valve 4 (4a
4d), the reverse cleaning unit 5 and the ultrasonic oscillation controller 9 are commanded by the reverse cleaning controller 6 in the time sequence shown in FIG.
【００１４】本発明の実施例によれば、次の効果が得ら
れる。According to the embodiment of the present invention, the following effects can be obtained.
【００１５】(１)．少なくとも２セット以上のタンク形
膜ろ過装置があって、運転側が通水工程とし、待機側が
逆洗浄工程としているので、ろ過膜の洗浄中に通水を止
めることがないので、連続的に処理できるから能率がよ
い。(1). Since there are at least two or more sets of tank-type membrane filtration devices, the operation side is a water-flow process and the standby side is a backwashing process, there is no need to stop water flow during washing of the filtration membrane, so continuous treatment is possible. Good efficiency.
【００１６】(２)．オゾン処理槽とタンク形ろ過装置と
の間に粗フィルターを設けたので、大きい有害物はろ過
膜へ行かないので、ろ過膜の目づまりが少なくなると共
に、逆洗浄時に粗フィルターに付着した有害物質は通水
方向に対し、逆洗浄方向にしたので、付着物は剥離しや
すくなる。故に、逆洗浄効率が向上する。(2). Since a coarse filter is provided between the ozone treatment tank and the tank type filtration device, large harmful substances do not go to the filtration membrane, so clogging of the filtration membrane is reduced and harmful substances attached to the coarse filter during back washing are reduced. Since the cleaning direction is set to the reverse cleaning direction with respect to the water flowing direction, the adhered substances are easily peeled off. Therefore, the backwashing efficiency is improved.
【００１７】(３)．ろ過膜への通水方向に対し、逆洗浄
方向がろ過膜間に直角方向より流して洗浄するので、表
面についた付着物はとれやすくなり、逆洗浄効率が向上
する。(3). Since the reverse washing direction flows between the filtration membranes at right angles to the direction of water flow to the filtration membrane for washing, the attached matter on the surface is easily removed and the backwashing efficiency is improved.
【００１８】(４)．ろ過膜の逆洗浄方向の入口側に超音
波振動を与えているので、膜表面についた付着物は剥離
がとれやすくなり逆洗浄効率が向上する。(4). Since ultrasonic vibration is applied to the inlet side of the filtration membrane in the reverse washing direction, the adhered matter on the membrane surface can be easily removed and the efficiency of the reverse washing is improved.
【００１９】[0019]
【発明の効果】以上のように、本発明によれば、膜ろ過
装置内のろ過膜の部品交換作業がなくなり、メンテンス
フリーとなりランニングコストを大幅に低減できる効果
が得られる。As described above, according to the present invention, there is no need to replace parts of the filtration membrane in the membrane filtration apparatus, and the maintenance cost is reduced, so that the running cost can be greatly reduced.
【図１】本発明の実施例として示したオゾン浄水処理装
置の説明図である。FIG. 1 is an explanatory diagram of an ozone water treatment apparatus shown as an embodiment of the present invention.
【図２】図１に使用した膜ろ過装置の逆洗経路の説明図
である。FIG. 2 is an explanatory diagram of a backwash path of the membrane filtration device used in FIG.
【図３】図１に使用した逆洗浄制御部のタイムシーケン
スの説明図である。FIG. 3 is an explanatory diagram of a time sequence of a reverse cleaning control unit used in FIG. 1;
【図４】本発明の他の実施例として示したオゾン浄水処
理装置の説明図である。FIG. 4 is an explanatory view of an ozone water treatment apparatus shown as another embodiment of the present invention.
１…オゾン処理槽、２…膜ろ過装置、２ｃ…ろ過膜、３
…浄化水槽、４…切替弁、５…逆洗浄ユニット、５ａ…
クッションタンク、５ｂ…ストレーナ、５ｃ…逆止弁、
５ｄ…ミキサー、５ｅ…逆洗浄ポンプ、５ｆ…ドレン
弁、５ｇ…洗浄材容器、６…逆洗浄制御部、７…粗フィ
ルター、８…超音波振動子、９…超音波発振制御部、９
ａ…電源部、９ｂ…スイープ制御部、９ｃ…送信部。DESCRIPTION OF SYMBOLS 1 ... Ozone treatment tank, 2 ... Membrane filtration device, 2c ... Filtration membrane, 3
... Purification water tank, 4 ... Switching valve, 5 ... Backwash unit, 5a ...
Cushion tank, 5b: strainer, 5c: check valve,
5d: mixer, 5e: reverse cleaning pump, 5f: drain valve, 5g: cleaning material container, 6: reverse cleaning control unit, 7: coarse filter, 8: ultrasonic vibrator, 9: ultrasonic oscillation control unit, 9
a: power supply unit, 9b: sweep control unit, 9c: transmission unit.
Claims (5)
して浄水のみを通過させる少なくとも２セットの膜ろ過
装置を有するものにおいて、運転中の膜ろ過装置を通過
する浄水と、待機中の膜ろ過装置に運転中の膜ろ過装置
の浄水方向と反対方向に水を流し、付着したゴミを除去
することを特徴とするオゾン浄水処理装置。Claims: 1. An apparatus having at least two sets of membrane filtration devices for blocking dirt from an ozone treatment tank with a membrane filtration device and passing only purified water, wherein purified water passing through an operating membrane filtration device and standby water filtration An ozone water purification apparatus characterized by flowing water through the membrane filtration apparatus in a direction opposite to the water purification direction of the operating membrane filtration apparatus to remove attached dust.
せる順方向弁と順方向弁と逆方向に流通させる逆方向弁
とを備えた切替弁を設け、待機中の膜ろ過装置の逆方向
弁に洗浄をする逆洗浄ユニットを連結することを特徴と
する請求項１記載のオゾン浄水処理装置。2. A switching valve having a forward valve for flowing from the inlet side to the outlet side of each membrane filtration device and a reverse valve for flowing in the reverse direction to the forward direction valve is provided. The ozone water treatment apparatus according to claim 1, wherein a reverse cleaning unit for performing cleaning is connected to the reverse valve.
角方向より水を流して洗浄することを特徴とする請求項
１又は２記載のオゾン浄水処理装置。3. The ozone water purification apparatus according to claim 1, wherein water is supplied to the waiting membrane filtration apparatus from a direction perpendicular to the water purification direction for washing.
波振動子を設けたことを特徴とする請求項１又は２記載
のオゾン浄水処理装置。4. An ozone water treatment apparatus according to claim 1, wherein an ultrasonic oscillator is provided on an inlet side of the backwash water of the backwash unit.
ることを特徴とする請求項１又は２記載のオゾン浄水処
理装置。5. The ozone water treatment apparatus according to claim 1, wherein a filter is provided on an inlet side of each membrane filtration device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3006397A JPH10225684A (en) | 1997-02-14 | 1997-02-14 | Water purification device by ozone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3006397A JPH10225684A (en) | 1997-02-14 | 1997-02-14 | Water purification device by ozone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10225684A true JPH10225684A (en) | 1998-08-25 |
Family
ID=12293362
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3006397A Pending JPH10225684A (en) | 1997-02-14 | 1997-02-14 | Water purification device by ozone |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10225684A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007111623A (en) * | 2005-10-20 | 2007-05-10 | Tsukishima Kikai Co Ltd | Filtration unit |
| JP2011016044A (en) * | 2009-07-07 | 2011-01-27 | Sumitomo Electric Ind Ltd | Method for cleaning filtration film and filter |
| CN102115253A (en) * | 2011-01-14 | 2011-07-06 | 中国环境科学研究院 | Novel multi-technology synergetic catalysis advanced micro-bubble ozone oxidation tower |
| CN114349112A (en) * | 2022-01-21 | 2022-04-15 | 重庆医科大学 | Liquid treatment method, system, apparatus and medium |
-
1997
- 1997-02-14 JP JP3006397A patent/JPH10225684A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007111623A (en) * | 2005-10-20 | 2007-05-10 | Tsukishima Kikai Co Ltd | Filtration unit |
| JP2011016044A (en) * | 2009-07-07 | 2011-01-27 | Sumitomo Electric Ind Ltd | Method for cleaning filtration film and filter |
| CN102115253A (en) * | 2011-01-14 | 2011-07-06 | 中国环境科学研究院 | Novel multi-technology synergetic catalysis advanced micro-bubble ozone oxidation tower |
| CN114349112A (en) * | 2022-01-21 | 2022-04-15 | 重庆医科大学 | Liquid treatment method, system, apparatus and medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3755912B2 (en) | A device that allows drinking water with a submerged filter membrane | |
| JP4920990B2 (en) | Separation membrane cleaning method | |
| JP2005500156A (en) | System and method for collecting permeate through a filter and cleaning the filter in that position | |
| JPH11156166A (en) | Cleaning method for hollow fiber membrane module | |
| JPH05305221A (en) | Membrane separation water treatment apparatus | |
| US20060272999A1 (en) | Method and apparatus for a water filter backflush | |
| JP2009090276A (en) | System for filtering raw water for drinking water | |
| EP3898532B1 (en) | Wastewater treatment and method for textile industry | |
| JPH10109095A (en) | Water purifying treatment device | |
| TWI693096B (en) | Membrane separation active sludge system and membrane cleaning device | |
| JPH10225684A (en) | Water purification device by ozone | |
| JP2000167555A (en) | Cleaning of immersion membrane | |
| JPH0337995B2 (en) | ||
| KR101766898B1 (en) | Purification system for water having back wash function | |
| JP5423184B2 (en) | Filtration membrane module cleaning method and cleaning apparatus | |
| JP2001187324A (en) | Washing method of membrane filter device, and water treating device | |
| JP3371767B2 (en) | Operating method of membrane deaerator and membrane deaerator | |
| KR20140128841A (en) | Apparatus for Cross cleaning water of membrane module and the operating method thereof | |
| JP3880251B2 (en) | Backwash method for submerged membrane separator | |
| WO2012157668A1 (en) | Filtration apparatus and method for washing filtration apparatus | |
| JP2000197884A (en) | Clogging preventing device of filter apparatus | |
| JP2002224670A (en) | Apparatus for treating water | |
| JPH09192459A (en) | Method for washing immersion type membrane separating apparatus | |
| JP7251565B2 (en) | Ship ballast water treatment system and ship ballast water treatment method | |
| JP2000084377A (en) | Removal of membrane contaminated substance for tubular membrane device |