JPH03262589A - Water treatment plant - Google Patents
Water treatment plantInfo
- Publication number
- JPH03262589A JPH03262589A JP6149890A JP6149890A JPH03262589A JP H03262589 A JPH03262589 A JP H03262589A JP 6149890 A JP6149890 A JP 6149890A JP 6149890 A JP6149890 A JP 6149890A JP H03262589 A JPH03262589 A JP H03262589A
- Authority
- JP
- Japan
- Prior art keywords
- water
- raw water
- filter
- storage tank
- equipment
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 98
- 238000004062 sedimentation Methods 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 10
- 230000008569 process Effects 0.000 claims abstract description 9
- 230000003311 flocculating effect Effects 0.000 claims abstract 2
- 238000001914 filtration Methods 0.000 claims description 25
- 239000000126 substance Substances 0.000 claims description 16
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 238000005273 aeration Methods 0.000 claims description 3
- 239000003643 water by type Substances 0.000 abstract 2
- 239000008213 purified water Substances 0.000 abstract 1
- 239000000919 ceramic Substances 0.000 description 19
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 8
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 238000000746 purification Methods 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 4
- 239000005708 Sodium hypochlorite Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 239000010802 sludge Substances 0.000 description 4
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 4
- 238000005345 coagulation Methods 0.000 description 3
- 230000015271 coagulation Effects 0.000 description 3
- 238000005189 flocculation Methods 0.000 description 3
- 230000016615 flocculation Effects 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 2
- 238000013019 agitation Methods 0.000 description 2
- 210000000988 bone and bone Anatomy 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 235000011121 sodium hydroxide Nutrition 0.000 description 2
- 239000006228 supernatant Substances 0.000 description 2
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 239000000796 flavoring agent Substances 0.000 description 1
- 244000144992 flock Species 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 150000004045 organic chlorine compounds Chemical class 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 230000001151 other effect Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、河川などの原水を取水して衛生的な水に浄化
する水処理設備に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to water treatment equipment that takes raw water from rivers and the like and purifies it into sanitary water.
従来の技術
従来の水処理設備は、たとえば第５図に示すようなもの
であった。第５図において、取水口ｌから汲み上げられ
る原水は除塵機２を通して着水井３に供給され、着水井
３には必要に応じて次亜塩素酸ソーダもしくは塩素ガス
が次亜塩素酸ソーダ貯留槽４もしくは塩素ガスボンベ（
図示せず）から供給される。また、着水井３から混和池
５に送られた原水に対してカセイソーダ貯留槽６ならび
に凝集剤貯留槽７から供給されるアルカリ剤および凝集
剤・凝集助剤などが必要に応じて混和される。BACKGROUND OF THE INVENTION A conventional water treatment facility is, for example, as shown in FIG. In Fig. 5, raw water pumped up from the water intake l is supplied to the landing well 3 through the dust remover 2, and sodium hypochlorite or chlorine gas is supplied to the landing well 3 as needed in the sodium hypochlorite storage tank 4. Or a chlorine gas cylinder (
(not shown). Further, an alkaline agent, a flocculant/flocculation aid, etc. supplied from the caustic soda storage tank 6 and the flocculant storage tank 7 are mixed with the raw water sent from the landing well 3 to the mixing pond 5 as necessary.
そして、混和池５で必要に応じて凝集剤・凝集助剤およ
びアルカリ剤を混和された原水はフロック形成池８に送
られ、原水中のそのままでは重力沈降しがたい浮遊物質
の粒子が凝集されてフロックに形成される。さらに、原
水は薬品沈殿池９に送られてフロックを沈殿除去され、
その上澄水が急速濾過池Ｉｆに送られる。また、直接濾
過の場合には、原水が着水井３から二次混和池ＩＯに送
られ、二次混和池ｌＯでカセイソーダ貯留槽６ならびに
凝集剤貯留槽７から供給されるアルカリ剤および凝集剤
・凝集助剤などが混和される。Then, the raw water mixed with a flocculant, flocculant aid, and alkaline agent as necessary in the mixing pond 5 is sent to the flocculation pond 8, where particles of suspended solids that are difficult to settle by gravity in the raw water are flocculated. formed into flocs. Furthermore, the raw water is sent to a chemical sedimentation tank 9 where flocs are precipitated and removed.
The supernatant water is sent to the rapid filtration pond If. In the case of direct filtration, the raw water is sent from the landing well 3 to the secondary mixing pond IO, where the alkaline agent and flocculant are supplied from the caustic soda storage tank 6 and the flocculant storage tank 7. Coagulation aids and the like are mixed.
そして、薬品沈殿池９および二次混和池１０から送られ
る被処理水は、急速濾過池１１において濾材の濾過作用
により濁質を捕捉され、濾材を透過した濾過処理水は次
亜塩素酸ソーダ貯留槽４から供給される消毒用の次亜塩
素酸ソーダを添加された後に浄水池１２に送られる。ま
た、濾過処理水は必要に応じて、オゾン接触槽１３およ
び活性炭濾過池１４よりなる高度処理設備に送られ、微
量有機物・有機塩素化合物・アンモニ性窒素・臭気成分
などを除去される。The water to be treated sent from the chemical sedimentation tank 9 and the secondary mixing tank 10 has turbidity captured by the filtration action of the filter medium in the rapid filtration tank 11, and the filtered water that has passed through the filter medium is stored in sodium hypochlorite storage. After adding sodium hypochlorite for disinfection supplied from the tank 4, the water is sent to the water purification pond 12. Further, the filtered water is sent to an advanced treatment facility consisting of an ozone contact tank 13 and an activated carbon filtration basin 14, as necessary, to remove trace organic substances, organic chlorine compounds, ammonium nitrogen, odor components, and the like.
そして、急速濾過池１１で除去された濁質は逆洗水によ
って洗い出され、濁質を含む逆洗水は排水池１５を経て
着水井３に戻される。また、薬品沈殿池９で沈降した汚
泥は排泥池１６を経て濃縮槽１７に送られ、濃縮槽１７
における上澄水は排水池１５に送られる。The turbidity removed in the rapid filtration basin 11 is washed out by backwash water, and the backwash water containing the turbidity is returned to the receiving well 3 via the drainage basin 15. In addition, the sludge settled in the chemical settling tank 9 is sent to the thickening tank 17 via the sludge tank 16.
The supernatant water in is sent to the drainage pond 15.
発明が解決しようとする課題
しかし、上記した従来の水処理設備の構成においては、
設備の立地に広い敷地を要する問題があり、原水の水質
の変動に対しては、薬品注入量の調整などを行わねばな
らず、その対応が難しい問題があった。Problems to be Solved by the Invention However, in the configuration of the conventional water treatment equipment described above,
The problem was that the equipment required a large site, and changes in the quality of raw water required adjustments to the amount of chemicals injected, making it difficult to deal with.
本発明は上記課題を解決するもので、大規模の設備を用
いることなく、設備の簡略化を図りながら多量、多様の
原水を処理することができ、原水量の増大に適宜に対応
することができる水処理設備を提供することを目的とす
る。The present invention solves the above problems, and it is possible to treat a large amount and variety of raw water while simplifying the equipment without using large-scale equipment, and it is possible to respond appropriately to increases in the amount of raw water. The purpose is to provide water treatment facilities that can
課題を解決するための手段
上記課題を解決するために本発明は、水源から原水を取
水し、混和・凝集設備、沈殿池、濾過設備などの各処理
工程もしくはその一部の工程を通して原水を浄化し、浄
化された処理水を浄水池に貯留する水処理設備において
、各処理工程を行う設備の全処理工程または沈殿池、濾
過設備が精密濾過装置に置き換えられ、精密濾過装置が
原水を貯留する貯留槽と、原水に浸漬して貯留槽内に配
置されたフィルターと、フィルターの下方に設けられた
散気装置と、フィルターを通して原水を吸引する吸引ポ
ンプとを備えた構成としたものである。Means for Solving the Problems In order to solve the above problems, the present invention takes raw water from a water source and purifies the raw water through various treatment steps such as mixing/coagulation equipment, settling basins, and filtration equipment, or through a part of the processing steps. In water treatment equipment that stores purified treated water in a water purification pond, all treatment steps, sedimentation tanks, and filtration equipment in the equipment that performs each treatment process are replaced with a precision filtration device, and the precision filtration device stores raw water. The system includes a storage tank, a filter immersed in raw water and placed in the storage tank, an aeration device provided below the filter, and a suction pump that sucks the raw water through the filter.
また、貯留槽に対して凝集剤を注入する薬注設備を備え
た構成としたものである。Moreover, the structure is equipped with chemical injection equipment for injecting a flocculant into the storage tank.
作用
上記した水処理設備の構成により、フィルターによる精
密濾過によって原水中に含まれる有機物質、浮遊物、微
生物などの固体分からなる濁質がフィルターに捕捉され
るので、セラミックフィルターを透過した濾過処理水は
浄化された清澄水となる。したがって、従来の水処理設
備におけるフロック形成池や薬品沈殿池や急速濾過池な
どが省かれた簡略な設備において原水の浄化を行うこと
ができ、原水量の増加に対しては処理層内に浸漬するフ
ィルターの膜面積の拡張によって容易に対応することが
できる。また、水質の変動に対しても特別な対応を必要
としない。Function: With the configuration of the water treatment equipment described above, turbidity consisting of solids such as organic substances, suspended matter, and microorganisms contained in raw water is captured by the filter through precision filtration, so that the filtered water that has passed through the ceramic filter is becomes purified clear water. Therefore, raw water can be purified with simple equipment that does not require floc formation tanks, chemical sedimentation tanks, rapid filtration tanks, etc. in conventional water treatment equipment. This can be easily accommodated by expanding the membrane area of the filter. Furthermore, no special measures are required for changes in water quality.
また、貯留槽の中に薬注設備から凝集剤を注入すること
により、凝集、濾過を一つの槽において行うことができ
る。Furthermore, by injecting a flocculant into the storage tank from chemical injection equipment, flocculation and filtration can be performed in one tank.
実施例
以下本発明の一実施例を図面に基づいて説明する。第１
図〜第２図において、原水２１を汲み上げる取水口２２
は除塵機４１および着水井４２を介して貯留槽２４に連
通しており、貯留槽２４には原水２１が貯留されている
。そして、原水２１に浸漬してセラミックフィルター２
５が貯留槽２４の内部に配置されている。このセラミッ
クフィルター２５は円筒状に形成された複数のセラミッ
クチューブ２６からなり、セラミックチューブ２６の内
部は貯留槽２４の外部に設けた吸引ポンプ２７の吸入側
に連通している。また、吸引ポンプ２７の吐出側は浄水
池２８に連通している。EXAMPLE An example of the present invention will be described below based on the drawings. 1st
In Figure ~ Figure 2, water intake 22 pumping up raw water 21
is connected to a storage tank 24 via a dust remover 41 and a water landing well 42, and raw water 21 is stored in the storage tank 24. Then, the ceramic filter 2 is immersed in raw water 21.
5 is arranged inside the storage tank 24. This ceramic filter 25 is made up of a plurality of cylindrical ceramic tubes 26, and the inside of the ceramic tubes 26 communicates with the suction side of a suction pump 27 provided outside the storage tank 24. Further, the discharge side of the suction pump 27 communicates with a water purification pond 28 .
そして、セラミックフィルター２５の下方に位置して散
気装置２９が設けられており、散気装置２９は貯留槽２
４の外部に設けたブロワ−装置３０の吐出側に連通して
いる。また、吸引ポンプ２７と浄水池２８の間には、必
要に応じてオゾン接触槽３１および活性炭濾過池３２よ
りなる高度処理設備が介装されている。さらに、貯留槽
２４の底部は吸泥引抜ポンプ３３の吸入側に連通してい
る。An air diffuser 29 is provided below the ceramic filter 25, and the air diffuser 29 is connected to the storage tank 2.
It communicates with the discharge side of a blower device 30 provided outside of the air conditioner 4. Moreover, advanced treatment equipment consisting of an ozone contact tank 31 and an activated carbon filtration tank 32 is interposed between the suction pump 27 and the water purification tank 28 as required. Further, the bottom of the storage tank 24 communicates with the suction side of the suction pump 33 .
以下、上記構成における作用について説明する。Hereinafter, the effects of the above configuration will be explained.
原水２１は取水口２２から除塵機４１および着水井４２
を通して貯留槽２４に供給される。そして、貯留槽２４
に貯留された原水２１はセラミックフィルター２５を通
して吸引ポンプ２７で吸引される。このとき、セラミッ
クフィルター２５による精密濾過によって原水中に含ま
れる有機物質、浮遊物、微生物などの固体骨からなる濁
質が捕捉されるので、セラミックフィルター２５を透過
した濾過処理水３４は浄化した清澄水となって浄水池２
８に供給される。そして、散気装置２９から散気された
空気３５のエアリフト作用によって上昇攪拌流Ａが生じ
、上昇攪拌流Ａの剪断力によってセラミックフィルター
２５の各セラミックチューブ２６の表面に付着するゲル
層が除去されて目詰まりが防止される。また、セラミッ
クフィルター２５は必要に応じて空気または処理水を濾
過工程とは逆方向に通水することによって逆圧洗沖され
て目詰まりが防止される。したがって、従来の水処理設
備におけるフロック形成池や薬品沈降池や急速濾過池な
どが省かれた簡略な設備で原水２１の浄化を行うことが
でき、原水量の増加に対しては処理層２４の内部に浸漬
するセラミックフィルター２５の膜面積の拡張によって
容易に対応することができる。また、原水２１の水質の
変動に対しても特別な対応を必要としない。Raw water 21 is passed from the water intake 22 to the dust remover 41 and the water landing well 42.
It is supplied to the storage tank 24 through. And the storage tank 24
The raw water 21 stored in the chamber is sucked by a suction pump 27 through a ceramic filter 25. At this time, turbidity consisting of solid bones such as organic substances, suspended matter, and microorganisms contained in the raw water is captured by precision filtration by the ceramic filter 25, so that the filtered water 34 that has passed through the ceramic filter 25 is purified and clarified. Water becomes water purification pond 2
8. Then, an upward agitation flow A is generated by the air lift action of the air 35 diffused from the aeration device 29, and the gel layer adhering to the surface of each ceramic tube 26 of the ceramic filter 25 is removed by the shear force of the upward agitation flow A. This prevents clogging. Further, the ceramic filter 25 is back-pressure washed by passing air or treated water in the direction opposite to the filtration step, as necessary, to prevent clogging. Therefore, the raw water 21 can be purified with simple equipment that does not require floc formation ponds, chemical sedimentation ponds, rapid filtration ponds, etc. in conventional water treatment facilities, and the treatment layer 24 can be used for increasing the amount of raw water. This can be easily accommodated by expanding the membrane area of the ceramic filter 25 immersed inside. Furthermore, no special measures are required for changes in the quality of the raw water 21.
また、濾過処理水３４は必要に応じてオゾン接触槽３１
および活性炭濾過池３２に送られ、処理水３４に残留す
る異臭味や有機微量物質をオゾンの酸化作用および活性
炭による吸着作用によって除去される。さらに、セラミ
ックフィルター２５で捕捉された汚泥（懸濁物質）は吸
泥引抜ポンプ３３によって貯留槽２４の外部に排出され
る。In addition, the filtered water 34 is transferred to an ozone contact tank 31 as necessary.
The treated water 34 is then sent to an activated carbon filtration pond 32, where any off-flavors and trace organic substances remaining in the treated water 34 are removed by the oxidizing action of ozone and the adsorption action of activated carbon. Furthermore, the sludge (suspended solids) captured by the ceramic filter 25 is discharged to the outside of the storage tank 24 by the sludge suction pump 33.
第３図は本発明の他の実施例を示すものであり、先の実
施例と同様の作用を行う部材については同一番号を付し
て説明を省略する。FIG. 3 shows another embodiment of the present invention, and members having the same functions as those in the previous embodiment are given the same reference numerals and their explanations will be omitted.
第３図において、取水口２２から貯留槽２４の間には、
除塵機４１．着水井４２の他に混和池４３．フロック形
成池４４．薬品沈殿池４５などが介装されている。In FIG. 3, between the water intake 22 and the storage tank 24,
Dust remover41. In addition to the landing well 42, there is a mixing pond 43. Flock formation pond 44. A chemical sedimentation tank 45 and the like are interposed.
これらの設備における処理工程によって原水２１に含ま
れる砂などの固体骨が沈降除去されるとともに、浮遊物
質が凝集されて沈降除去される。このため、貯留槽２４
に流入する原水２１に含まれる濁質が低減されるので、
セラミックフィルター２５に加わる負荷を軽減すること
ができる。他の作用効果は先の実施例と同様である。Through the treatment steps in these facilities, solid bones such as sand contained in the raw water 21 are sedimented and removed, and suspended solids are aggregated and sedimented and removed. For this reason, the storage tank 24
Since the turbidity contained in the raw water 21 flowing into the water is reduced,
The load applied to the ceramic filter 25 can be reduced. Other effects are the same as in the previous embodiment.
第４図は本発明のさらに他の実施例を示すものであり、
薬注設備５１が貯留槽２４に接続して設けられており、
薬注設備５１によって凝集剤および、必要に応してｐＨ
調整剤を貯留槽２４に注入する。FIG. 4 shows still another embodiment of the present invention,
A chemical injection facility 51 is provided connected to the storage tank 24,
A flocculant and, if necessary, pH
The conditioning agent is injected into the storage tank 24.
この構成によれば、凝集、濾過を貯留槽２４の一つの槽
だけで行うことができる。According to this configuration, coagulation and filtration can be performed in only one tank, the storage tank 24.
尚、上記した実施例においては、フィルターとしてセラ
ミックフィルターを用いているが他のフィルター（たと
えば有機素材からなるものなど）でも浸漬方式で利用で
きれば素材に拘るものではない。In the above-described embodiments, a ceramic filter is used as the filter, but other filters (such as those made of organic materials) may be used as long as they can be used in the immersion method.
発明の効果
以上述べたように本発明によれば、原水中の濁質をフィ
ルターで捕捉することにより、フィルターを透過した濾
過処理水を浄化された清澄水にすることができ、従来の
水処理設備におけるフロック形成池や薬品沈殿池や急速
濾過池などが省かれた簡略な設備で原水の浄化を行うこ
とができ、原水量の増加に対しては貯留槽内に浸漬する
フィルターの膜面積の拡張によって容易に対応すること
ができる。Effects of the Invention As described above, according to the present invention, by capturing suspended matter in raw water with a filter, the filtered water that has passed through the filter can be made into purified clear water, which is different from conventional water treatment. Raw water can be purified with simple equipment that does not require floc formation tanks, chemical sedimentation tanks, rapid filtration tanks, etc. In response to increases in the amount of raw water, the membrane area of the filter immersed in the storage tank can be reduced. This can be easily accommodated by extension.
第１図は本発明の一実施例を示す全体構成図、第２図は
同実施例におけるセラミックフィルターの濾過作用を示
す模式図、第３図は本発明の他の実施例を示す全体構成
図、第４図は本発明の他の実施例を示す全体構成図、第
５図は従来の水処理設備の全体構成図である。
２１・・・原水、２４・・・貯留槽、２５・・・セラミ
ックフィルター、２６・・・セラミックチューブ、２７
・・・吸引ポンプ、２８・・・浄水池、２９・・・散気
装置、３ｏ・・・ブロワ−装置、３４・・・濾過処理水
、
３５・・・空気、Fig. 1 is an overall configuration diagram showing one embodiment of the present invention, Fig. 2 is a schematic diagram showing the filtration action of a ceramic filter in the same embodiment, and Fig. 3 is an overall configuration diagram showing another embodiment of the invention. , FIG. 4 is an overall configuration diagram showing another embodiment of the present invention, and FIG. 5 is an overall configuration diagram of a conventional water treatment facility. 21... Raw water, 24... Storage tank, 25... Ceramic filter, 26... Ceramic tube, 27
... Suction pump, 28... Water purification pond, 29... Air diffuser, 3o... Blower device, 34... Filtered water, 35... Air,
Claims (1)
濾過設備などの各処理工程もしくはその一部の工程を通
して原水を浄化し、浄化された処理水を浄水池に貯留す
る水処理設備において、各処理工程を行う設備の全処理
工程または沈殿池、濾過設備が精密濾過装置に置き換え
られ、精密濾過装置が原水を貯留する貯留槽と、原水に
浸漬して貯留槽内に配置されたフィルターと、フィルタ
ーの下方に設けられた散気装置と、フィルターを通して
原水を吸引する吸引ポンプとを備えたことを特徴とする
水処理設備。 ２、貯留槽に対して凝集剤を注入する薬注設備を備えた
ことを特徴とする請求項１記載の水処理設備。[Claims] 1. Taking raw water from a water source, mixing and flocculating equipment, a settling tank,
In water treatment equipment that purifies raw water through each treatment process or a part of it, such as filtration equipment, and stores the purified treated water in a water treatment pond, all treatment processes or sedimentation tanks and filtration of the equipment that performs each treatment process The equipment has been replaced with a precision filtration device, and the precision filtration device has a storage tank that stores raw water, a filter immersed in the raw water and placed in the storage tank, an aeration device installed below the filter, and a filter that passes through the filter. A water treatment facility characterized by being equipped with a suction pump that sucks raw water. 2. The water treatment equipment according to claim 1, further comprising chemical injection equipment for injecting a flocculant into the storage tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6149890A JPH03262589A (en) | 1990-03-13 | 1990-03-13 | Water treatment plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6149890A JPH03262589A (en) | 1990-03-13 | 1990-03-13 | Water treatment plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03262589A true JPH03262589A (en) | 1991-11-22 |
Family
ID=13172822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6149890A Pending JPH03262589A (en) | 1990-03-13 | 1990-03-13 | Water treatment plant |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03262589A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002028651A (en) * | 2000-07-17 | 2002-01-29 | Mitsubishi Rayon Co Ltd | Purified water treatment system and purified water treatment method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62197198A (en) * | 1986-02-26 | 1987-08-31 | Japan Organo Co Ltd | Aerobic biological reaction apparatus |
| JPH01245894A (en) * | 1988-03-25 | 1989-10-02 | Kubota Ltd | Filter apparatus for treatment of water |
-
1990
- 1990-03-13 JP JP6149890A patent/JPH03262589A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62197198A (en) * | 1986-02-26 | 1987-08-31 | Japan Organo Co Ltd | Aerobic biological reaction apparatus |
| JPH01245894A (en) * | 1988-03-25 | 1989-10-02 | Kubota Ltd | Filter apparatus for treatment of water |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002028651A (en) * | 2000-07-17 | 2002-01-29 | Mitsubishi Rayon Co Ltd | Purified water treatment system and purified water treatment method |
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