JP2000279770A - Membrane failure detector of membrane filter device, method therefor and operating method - Google Patents
Membrane failure detector of membrane filter device, method therefor and operating methodInfo
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- JP2000279770A JP2000279770A JP11087615A JP8761599A JP2000279770A JP 2000279770 A JP2000279770 A JP 2000279770A JP 11087615 A JP11087615 A JP 11087615A JP 8761599 A JP8761599 A JP 8761599A JP 2000279770 A JP2000279770 A JP 2000279770A
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- membrane
- filtration
- damage
- value
- water
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、河川水、湖沼水、
し尿水、下水、用水および排水等の各種原水を処理する
ための膜ろ過装置で処理する膜損傷検知装置、その方
法、および運転方法に関し、特に水道用膜ろ過処理施設
において、膜ろ過水の水質を管理するために膜の破断も
しくは損傷を検出する膜ろ過装置の膜損傷検知装置、そ
の方法、および運転方法に関するものである。TECHNICAL FIELD The present invention relates to river water, lake water,
The present invention relates to a membrane damage detection device, a method thereof, and an operation method for treating with a membrane filtration device for treating various raw waters such as human wastewater, sewage, service water, and wastewater. The present invention relates to a membrane damage detection device for a membrane filtration device for detecting breakage or damage of a membrane in order to manage the damage, a method thereof, and an operation method.
【０００２】[0002]
【従来の技術】近年、水道水に流れ込んだ病原性微生物
であるクリプトスポリジュームによる集団感染が発生
し、この種の病原性微生物に対しては、塩素殺菌が効果
なく、その危険性が危惧されており、その対策として
は、水道水の濁度を０．１度以下とするという暫定指針
が策定されている。2. Description of the Related Art In recent years, a mass infection by cryptosporidium, which is a pathogenic microorganism that has flowed into tap water, has occurred. This type of pathogenic microorganism is not effectively chlorinated, and its danger is feared. As a countermeasure, provisional guidelines have been formulated to reduce the turbidity of tap water to 0.1 degrees or less.
【０００３】原水からクリプトスポリジューム等の病原
性微生物を除去できる設備としては、中空糸膜を用いた
膜ろ過装置が有効である。通常、水道用の膜ろ過装置で
は、膜処理工程後、塩素消毒工程のみであるのが、一般
的であるため、水道水に病原性微生物等が混入するのを
阻止するために、膜ろ過側に連続型濁度計を設置し、ろ
過水の濁度を連続的に監視を行っている。[0003] As a facility capable of removing pathogenic microorganisms such as Cryptosporidium from raw water, a membrane filtration device using a hollow fiber membrane is effective. Usually, in a membrane filtration device for water supply, after the membrane treatment process, only a chlorine disinfection process is generally performed.In order to prevent pathogenic microorganisms from being mixed into the tap water, the membrane filtration side is used. A continuous type turbidity meter is installed in the company to continuously monitor the turbidity of filtered water.
【０００４】図４は、従来の中空糸型膜ろ過装における
外圧型クロスフローろ過方式の処理フローを示してい
る。同図において、循環タンク１内の原水は、循環ポン
プ２により、ろ過膜モジュール３へ送られ、その一部
は、循環水として循環タンク１へ返送され、残りの水
は、ろ過膜モジュール３を透過して膜ろ過処理される。
膜ろ過処理された透過水の一部は、連続型濁度計４に導
かれ、その濁度が連続的に計測され、その値を電気信号
として、制御手段５へと入力される。FIG. 4 shows a processing flow of an external pressure type cross flow filtration system in a conventional hollow fiber membrane filtration device. In the figure, raw water in a circulation tank 1 is sent to a filtration membrane module 3 by a circulation pump 2, a part of which is returned to the circulation tank 1 as circulation water, and the remaining water is passed through the filtration membrane module 3. Permeate and membrane filtered.
Part of the permeated water that has been subjected to the membrane filtration is led to the continuous turbidity meter 4, where the turbidity is continuously measured, and the value is input to the control means 5 as an electric signal.
【０００５】従来の中空糸型膜ろ過装置では、連続型濁
度計４の計測値が所定の値を所定時間を越えた場合に、
膜が損傷もしくは破断したものと判断して、循環ポンプ
２を停止して、膜ろ過運転を停止するように制御されて
いる。その後、連続型濁度計４自体に異常が無いかを点
検して、異常が無い場合、膜が損傷もしくは破断したも
のと判断して、膜モジュール３の交換作業を行ってい
る。一方、連続型濁度計４自体が、異常である場合は、
その修理を行った行った後、再び通常の膜ろ過運転を実
施している。In the conventional hollow fiber membrane filtration device, when the measured value of the continuous turbidity meter 4 exceeds a predetermined value for a predetermined time,
When it is determined that the membrane is damaged or broken, the circulation pump 2 is stopped to control the membrane filtration operation to stop. Thereafter, the continuous turbidity meter 4 itself is checked for any abnormality. If there is no abnormality, the membrane is judged to be damaged or broken, and the membrane module 3 is replaced. On the other hand, when the continuous turbidimeter 4 itself is abnormal,
After performing the repair, a normal membrane filtration operation is performed again.
【０００６】上記の従来例では、連続型濁度計４の計測
値自体の信頼性に関して以下の問題がある。第１の問題
は、連続型濁度計４へ流入する膜ろ過水に何らかの原因
で気泡が同伴された場合に、測定原理上、これを濁度成
分として誤認識するために高濁度値を出力する場合があ
る。第２の問題としては、膜ろ過側の配管内に付着して
いたスケール（カルシウムが主成分）もしくはスライム
（有機物が主成分）が剥離して、連続型濁度計４に流入
することにより、高濁度値を出力する場合がある。これ
らの問題は、膜が損傷もしくは破断していない場合で
も、連続型濁度計４の値が高濁度値を出力するために、
膜が損傷もしくは破断した可能性があると判断して、膜
ろ過装置への通水が停止され、その度に、手動で連続型
濁度計４の点検を実施しなければならないという問題が
あった。In the above conventional example, there are the following problems with respect to the reliability of the measurement value itself of the continuous turbidimeter 4. The first problem is that, when bubbles are entrained for some reason in the membrane filtration water flowing into the continuous turbidity meter 4, a high turbidity value must be determined in order to erroneously recognize this as a turbidity component on the measurement principle. May be output. The second problem is that the scale (mainly composed of calcium) or slime (mainly composed of organic matter) that has adhered to the piping on the membrane filtration side peels off and flows into the continuous turbidimeter 4, High turbidity values may be output. These problems occur because the value of the continuous turbidimeter 4 outputs a high turbidity value even when the membrane is not damaged or broken.
There is a problem in that it is judged that there is a possibility that the membrane has been damaged or broken, and the flow of water through the membrane filtration device is stopped, and every time the continuous turbidity meter 4 needs to be inspected manually. Was.
【０００７】そこで、図４の膜ろ過装置において、濁度
の検出実験を行った。ろ過膜モジュール３は、５０００
本の中空糸で構成されている。図５に示したように、ろ
過膜モジュール３の中空糸に（イ）〜（ハ）の人為的な
欠陥を与えて実験を行った。（イ）は、膜の状態が正常
な場合、（ロ）は、１本の中空糸を人為的に損傷を与え
た場合（破断していない状態）、（ハ）は、１本の中空
糸を人為的に破断させた場合、（ニ）は、３本の中空糸
を破断させた場合である。これらの膜ろ過装置の膜ろ過
水を、連続型濁度計４として微粒子濁度計を用いて、そ
の出力値の経時変化を調べた。本実験に用いた膜モジュ
ールの仕様は、膜材質はＰＡＮ、膜の分画分子量は、１
３，０００Dalton、中空糸外径は、１．４ｍｍ、総膜面
積は、４１ｍ2 である。連続型濁度計の測定原理は、光
散乱方式であり、測定間隔は１回／１０秒である。Therefore, an experiment for detecting turbidity was performed in the membrane filtration device shown in FIG. Filtration membrane module 3 is 5000
It is composed of hollow fibers. As shown in FIG. 5, an experiment was conducted by giving the artificial defects (a) to (c) to the hollow fibers of the filtration membrane module 3. (A) is the case where the state of the membrane is normal, (B) is the case where one hollow fiber is artificially damaged (the state is not broken), and (C) is the one hollow fiber (D) is a case where three hollow fibers were broken. Using a membrane turbidity meter as the continuous turbidity meter 4 for the membrane filtered water of these membrane filtration devices, the change over time of the output value was examined. The specifications of the membrane module used in this experiment were such that the membrane material was PAN and the molecular weight cut off of the membrane was 1
3,000 Dalton, the outer diameter of the hollow fiber is 1.4 mm, and the total membrane area is 41 m 2 . The measurement principle of the continuous turbidimeter is a light scattering method, and the measurement interval is once / 10 seconds.
【０００８】図５に示したように、中空糸が正常時で
は、（イ）に示したように、濁度値が概ね０．００２５
度程度であるが、０．００４８度の濁度値も出現してい
る。図示されていないが、正常時の濁度０．００２５度
の１．５倍の濁度である０．００３８度の濁度が３分間
程度継続する場合も見られた。一方、（ロ）に示したよ
うに、中空糸が１本損傷している場合では、濁度値が、
０．００２５度より０．００５０度の範囲で変動した。
中空糸膜が１本破断した状態での濁度値は、（ハ）に示
したように、０．００４８度より０．００７０度の範囲
で変動した。また、中空糸膜が３本破断した状態での濁
度値は、（ニ）に示したように、０．００９０度より
０．０１５３度の範囲で変動した。この実験から明らか
なように、中空糸膜が１本以上破断した場合の濁度値の
判別は、比較的容易であることが判明したが、中空糸膜
が損傷した状態と正常な状態での濁度の判別は、連続型
濁度計４のみでは、困難であることが判明した。As shown in FIG. 5, when the hollow fiber is in a normal state, the turbidity value is approximately 0.0025, as shown in FIG.
Although turbidity values of the order of 0.0048 degrees have also appeared. Although not shown, turbidity of 0.0038 degrees, which is 1.5 times the turbidity of 0.0025 degrees in the normal state, continued for about 3 minutes. On the other hand, as shown in (b), when one hollow fiber is damaged, the turbidity value is
It fluctuated in the range of 0.0025 degrees to 0.0025 degrees.
The turbidity value in the state where one hollow fiber membrane was broken fluctuated in the range of 0.0048 degrees to 0.0070 degrees as shown in (c). In addition, the turbidity value in a state where three hollow fiber membranes were broken varied in the range of 0.0090 degrees to 0.0153 degrees as shown in (d). As is clear from this experiment, it was found that it was relatively easy to determine the turbidity value when one or more hollow fiber membranes were broken. Turbidity was found to be difficult to determine using only the continuous turbidimeter 4.
【０００９】なお、中空糸膜が１本破断した状態での膜
ろ過水の濁度値は、０．０１度未満であり、暫定的指針
値を越えていないが、クリプトスポリジューム等の病原
性微生物の大きさは３〜５μｍ程度あることから、病原
性微生物等が膜ろ過中に混入する危険性があるという問
題がある。[0009] The turbidity value of the membrane filtration water when one hollow fiber membrane is broken is less than 0.01 degree and does not exceed the provisional guideline value. Since the size of the microorganism is about 3 to 5 μm, there is a problem that there is a risk that pathogenic microorganisms and the like may be mixed during membrane filtration.
【００１０】[0010]
【発明が解決しようとする課題】従来の膜ろ過装置で
は、膜ろ過水側に設置した連続型濁度計の出力値のみで
膜の損傷および破断を検知する方式であったために、膜
の損傷時と膜正常時との判断を精度よく行うことが困難
であった。膜に損傷が発生した場合であっても、膜は正
常であると判断する可能性があり、その場合、病原性微
生物が水道水に混入して、水道水水質の安全性上に問題
を生じることになる。さらには、膜が正常であるにもか
かわらず、膜の損傷が発生したと判断することもあり、
無用な膜モジュールの交換作業によるコスト高といった
問題が発生していた。In the conventional membrane filtration apparatus, damage and breakage of the membrane are detected only by the output value of the continuous turbidity meter installed on the membrane filtration water side. It is difficult to accurately judge the time when the film is normal and when the film is normal. Even if the membrane is damaged, the membrane may be considered to be normal, in which case pathogenic microorganisms can enter the tap water and cause a problem in the safety of tap water quality Will be. In addition, even though the membrane is normal, it may be determined that membrane damage has occurred,
There has been a problem that cost is increased due to useless work of replacing the membrane module.
【００１１】本発明は、上記のような課題に鑑みなされ
たものであって、膜ろ過装置の膜の損傷時もしくは破断
時と膜正常時との判断を精度よく行うことができる膜ろ
過装置の膜損傷検知装置、その方法、およびその運転方
法を提供することを目的とするものである。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and is directed to a membrane filtration device capable of accurately determining whether the membrane of the membrane filtration device is damaged or broken and whether the membrane is normal. An object of the present invention is to provide a film damage detecting device, a method thereof, and a method of operating the same.
【００１２】[0012]
【課題を解決するための手段】本発明は、上記課題に鑑
みなされており、請求項１の発明では、中空糸膜による
ＵＦ膜もしくはＭＦ膜からなるろ過膜を有する膜ろ過装
置に設けられた膜損傷検知装置において、前記膜ろ過装
置の膜ろ過水の流出側に、該膜ろ過水中の微粒子または
濁度を測定する濁度検出手段を備え、該濁度検出手段が
所定値以上の値を所定時間以上計測した場合、前記膜ろ
過装置のろ過膜の損傷もしくは破断の可能性があるもの
と判定して、加圧手段によって浄化もしくは除菌化した
加圧空気を前記ろ過装置の膜ろ過水の流出側に供給して
保持状態とし、前記加圧空気の圧力保持率によって、前
記膜ろ過装置のろ過膜の損傷もしくは破断の有無を判定
する制御手段を備えることを特徴とする膜損傷検知装置
である。Means for Solving the Problems The present invention has been made in view of the above-mentioned problems, and according to the first aspect of the present invention, a membrane filtration device having a filtration membrane composed of a UF membrane or a MF membrane by a hollow fiber membrane is provided. In the membrane damage detection device, on the outflow side of the membrane filtration water of the membrane filtration device, turbidity detection means for measuring fine particles or turbidity in the membrane filtration water is provided, and the turbidity detection means has a value equal to or more than a predetermined value. When measured for a predetermined time or more, it is determined that there is a possibility of damage or breakage of the filtration membrane of the membrane filtration device, and pressurized air purified or sterilized by a pressurizing means is subjected to membrane filtration water of the filtration device. A membrane damage detection device, comprising: a control unit for determining whether or not a filtration membrane of the membrane filtration device is damaged or broken by a pressure retention rate of the pressurized air, by supplying the fluid to an outflow side of the membrane to a holding state. It is.
【００１３】この発明によれば、膜ろ過水の濁度の検出
に加えて、ろ過膜モジュールのろ過水側に加えられた加
圧空気を保持状態とし、所定時間後の圧力値に基づく、
圧力保持率からろ過膜モジュールのろ過膜の損傷もしく
は破断の有無を判定するようにしたものである。According to the present invention, in addition to the detection of the turbidity of the membrane filtration water, the pressurized air added to the filtration water side of the filtration membrane module is held, and based on the pressure value after a predetermined time,
The determination of the presence or absence of damage or breakage of the filtration membrane of the filtration membrane module is made based on the pressure retention rate.
【００１４】また、請求項２の発明は、中空糸膜による
ＵＦ膜もしくはＭＦ膜からなるろ過膜を有する膜ろ過装
置に設けられた膜損傷検知装置において、前記膜ろ過装
置の膜ろ過水の流出側に設けられ、該膜ろ過水中の微粒
子または濁度を測定する濁度検出手段と、前記膜ろ過装
置の膜ろ過水の流出側に除菌フィルタを通過した加圧空
気を供給する加圧手段と、前記膜ろ過装置の膜ろ過水の
流出側に加えられた前記加圧空気を保持状態とするため
の遮断手段と、前記遮断手段によって、前記流出側に加
えられた加圧空気を保持して、前記膜ろ過装置の膜ろ過
水側の圧力を測定する圧力計測手段と、前記循環ポンプ
の駆動制御と、前記遮断手段の開閉制御とを行うととも
に、前記濁度検出手段の計測値を処理して、所定値以上
の値が所定時間以上であるか否かを判定し、前記膜ろ過
装置のろ過膜の損傷もしくは破断の可能性を判定し、前
記膜ろ過装置の損傷もしくは破断の可能性が有ると判定
された場合、前記加圧手段を作動させた後、前記遮断手
段を作動させて加圧空気を保持状態とし、その加圧空気
の測定値から圧力保持率を算出し、その値が所定値以上
であるか否かを判定して、前記膜ろ過装置のろ過膜の損
傷もしくは破断の有無を判定する制御手段と、を備える
ことを特徴とする膜損傷検知装置である。[0014] The invention of claim 2 is directed to a membrane damage detection device provided in a membrane filtration device having a filtration membrane composed of a UF membrane or an MF membrane formed by a hollow fiber membrane, wherein the outflow of membrane filtration water of the membrane filtration device is provided. And turbidity detecting means for measuring fine particles or turbidity in the membrane filtered water, and pressurizing means for supplying pressurized air that has passed through a sterilization filter to the outflow side of the membrane filtered water of the membrane filtration device. And a shut-off means for holding the pressurized air added to the outflow side of the membrane filtration water of the membrane filtration device, and the pressurized air added to the outflow side by the shut-off means. Pressure measurement means for measuring the pressure on the membrane filtration water side of the membrane filtration device, drive control of the circulating pump, and opening / closing control of the shutoff means, and process the measurement value of the turbidity detection means. Then, a value equal to or greater than the predetermined value Is determined, the possibility of damage or breakage of the filtration membrane of the membrane filtration device is determined, if it is determined that there is a possibility of damage or breakage of the membrane filtration device, the pressurizing means After actuation, the shut-off means is actuated to keep the pressurized air in a holding state, a pressure holding ratio is calculated from a measured value of the pressurized air, and it is determined whether or not the value is equal to or more than a predetermined value. And control means for determining whether or not the filtration membrane of the membrane filtration device is damaged or ruptured.
【００１５】この発明によれば、制御手段を備えてお
り、この制御手段によって、膜ろ過水の濁度を検出し
て、膜ろ過装置のろ過膜の損傷もしくは破断の可能性の
判定を行い、さらに膜ろ過装置のろ過膜の内側（ろ過水
側）に加えられた加圧空気を保持状態にして、所定時間
経過後の圧力測定値から圧力保持率を算出し、その値が
所定値以上であるか否かによって、膜ろ過装置のろ過膜
の損傷もしくは破断の有無を判定するようにしたもので
ある。According to the present invention, a control means is provided, and the control means detects the turbidity of the membrane filtration water to determine the possibility of damage or breakage of the filtration membrane of the membrane filtration device. Further, the pressurized air added to the inside (filtration water side) of the filtration membrane of the membrane filtration device is kept in a holding state, and a pressure holding ratio is calculated from a pressure measurement value after a lapse of a predetermined time. Whether or not there is damage or breakage of the filtration membrane of the membrane filtration device is determined depending on whether or not there is any.
【００１６】また、請求項３の発明は、前記濁度検出手
段が、連続型濁度計もしくは連続型微粒子検出器であっ
て、前記制御手段が、前記濁度検出手段の計測値を処理
して、所定値以上の値を所定時間以上を計測した場合、
前記膜ろ過装置のろ過膜に損傷もしくは破断の可能性が
あるものと判定して、警告するために制御信号Ａを出力
し、該制御信号Ａに基づいて、前記加圧手段を作動させ
て、前記加圧空気を保持状態とし、その圧力値から圧力
保持率を算出して、その値が所定値以上であるか否かを
判定して、所定値未満である場合、前記膜ろ過装置のろ
過膜の損傷もしくは破断を有するものとして制御信号Ｂ
を出力して、その値が所定値以上である場合、前記膜ろ
過装置のろ過膜の損傷もしくは破断を有しないものとし
て制御信号Ｃを出力するシーケンス制御によることを特
徴とする請求項１または２に記載の膜損傷検知装置であ
る。Further, according to a third aspect of the present invention, the turbidity detecting means is a continuous turbidity meter or a continuous fine particle detector, and the control means processes the measured value of the turbidity detecting means. When a value equal to or greater than a predetermined value is measured for a predetermined time or more,
Determine that there is a possibility of damage or breakage of the filtration membrane of the membrane filtration device, output a control signal A to warn, based on the control signal A, actuate the pressurizing means, The pressurized air is kept in a holding state, a pressure holding ratio is calculated from the pressure value, and it is determined whether the value is equal to or more than a predetermined value. Control signal B as having membrane damage or breakage
And outputting a control signal C assuming that there is no damage or breakage of the filtration membrane of the membrane filtration device when the value is equal to or more than a predetermined value. 2. A film damage detection device according to item 1.
【００１７】この発明によれば、制御手段を備えてお
り、この制御手段によって、膜ろ過水の濁度を検出し
て、膜ろ過装置のろ過膜の損傷もしくは破断の可能性の
判定を行って制御信号Ａを出力し、さらに膜ろ過装置の
ろ過膜の内側（ろ過水側）に加えられた加圧空気を保持
状態にして、所定時間経過後の圧力測定値から圧力保持
率を算出し、その値が所定値以上であるか否かによっ
て、膜ろ過装置のろ過膜の損傷もしくは破断の有無を判
定して、制御信号Ｂ，Ｃを出力するようにしたものであ
り、制御信号Ｂもよって、膜モジュールの交換が可能で
あり、制御信号Ｃによって、通常運転への復帰が容易に
なし得る。According to the present invention, the control means is provided, and the control means detects the turbidity of the membrane filtration water to determine the possibility of damage or breakage of the filtration membrane of the membrane filtration device. A control signal A is output, and the pressurized air added to the inside of the filtration membrane (filtration water side) of the membrane filtration device is kept in a holding state, and a pressure retention rate is calculated from a pressure measurement value after a lapse of a predetermined time, The control signal B or C is output by determining whether or not the filtration membrane of the membrane filtration device is damaged or broken depending on whether or not the value is equal to or greater than a predetermined value. In addition, the membrane module can be replaced, and the control signal C can easily return to the normal operation.
【００１８】また、請求項４の発明は、中空糸膜による
ＵＦ膜もしくはＭＦ膜からなるろ過膜を有する膜ろ過装
置の膜損傷検知方法において、前記膜ろ過装置の膜ろ過
水の流出側に備えられた濁度検出手段によって、該膜ろ
過水中の微粒子または濁度を測定し、その計測値が所定
値以上であって、その値を所定時間以上計測した場合、
前記膜ろ過装置のろ過膜の損傷もしくは破断の可能性が
あるものと判定し、加圧手段によって浄化もしくは除菌
化した加圧空気を前記ろ過装置の膜ろ過水の流出側に供
給して保持し、その加圧空気の圧力保持率によって、前
記膜ろ過装置のろ過膜の損傷もしくは破断の有無を判定
することを特徴とする膜損傷検知方法である。According to a fourth aspect of the present invention, there is provided a method for detecting damage to a membrane filtration device having a filtration membrane comprising a UF membrane or a MF membrane formed by a hollow fiber membrane, wherein the membrane damage detection method is provided on the outflow side of the membrane filtration water of the membrane filtration device. By the obtained turbidity detecting means, the fine particles or turbidity in the membrane filtered water is measured, and the measured value is a predetermined value or more, and when the value is measured for a predetermined time or more,
It is determined that there is a possibility that the filtration membrane of the membrane filtration device may be damaged or broken, and pressurized air purified or sterilized by the pressurizing means is supplied to the outflow side of the membrane filtration water of the filtration device and retained. The membrane damage detection method is characterized in that the presence or absence of damage or breakage of the filtration membrane of the membrane filtration device is determined based on the pressure retention rate of the pressurized air.
【００１９】この発明によれば、濁度検出手段による所
定値以上の値を所定時間計測した場合は、膜ろ過装置の
ろ過膜の損傷もしくは破断の可能性があるものと判定
し、さらに加圧手段によって、損傷もしくは破断の有無
を判定するようになされており、確実に損傷もしくは破
断の有無を判断することができる。According to the present invention, when a value equal to or more than a predetermined value is measured for a predetermined time by the turbidity detecting means, it is determined that there is a possibility that the filtration membrane of the membrane filtration device may be damaged or broken, and the pressure is further increased. The means is used to determine the presence or absence of damage or breakage, and the presence or absence of damage or breakage can be reliably determined.
【００２０】また、請求項５の発明は、中空糸膜による
ＵＦ膜もしくはＭＦ膜からなるろ過膜を有する膜ろ過装
置の膜損傷検知方法において、前記膜ろ過装置の膜ろ過
水の流出側に備えられた濁度検出手段によって、該膜ろ
過水中の微粒子または濁度を測定し、その値が所定値以
上であって、所定時間以上計測した場合、前記膜ろ過装
置のろ過膜の損傷もしくは破断の可能性があるものと判
定する第１の工程と、前記第１の工程の後、前記膜ろ過
装置のろ過膜の外側に被処理水を保持した状態で、加圧
手段によって、該ろ過膜の内側に除菌フィルタを通し
て、該ろ過膜のバブリングポイント未満の圧力まで昇圧
した空気を供給して、その加圧状態を保持し、圧力計測
手段によって該ろ過膜の内側の圧力を１分間以上計測
し、その計測値から圧力保持率を算出して、該圧力保持
率が所定値以上であるか否かによって、前記ろ過膜の損
傷および破断の有無を判断する第２の工程とを有するこ
とを特徴とする膜損傷検知方法である。According to a fifth aspect of the present invention, there is provided a method for detecting a membrane damage of a membrane filtration device having a UF membrane or a MF membrane using a hollow fiber membrane, wherein the membrane filtration device is provided on an outflow side of the membrane filtration water of the membrane filtration device. The turbidity detecting means is used to measure fine particles or turbidity in the membrane filtration water, and when the value is equal to or more than a predetermined value and measured for a predetermined time or more, damage or breakage of the filtration membrane of the membrane filtration device is measured. A first step of determining that there is a possibility, and after the first step, in a state where the water to be treated is held outside the filtration membrane of the membrane filtration device, the pressure of the filtration membrane The inside of the filtration membrane is supplied with air pressurized to a pressure lower than the bubbling point of the filtration membrane through a sanitizing filter to maintain the pressurized state, and the pressure inside the filtration membrane is measured for 1 minute or more by a pressure measuring means. , The pressure Calculating a retention ratio, and determining whether the filtration membrane is damaged or broken by determining whether the pressure retention ratio is equal to or greater than a predetermined value. It is.
【００２１】この発明によれば、濁度検出手段による所
定値以上の値を所定時間計測した場合は、膜ろ過装置の
ろ過膜の損傷もしくは破断の可能性があるものと判定
し、さらに、加圧手段によって、ろ過膜のバブリングポ
イント未満の圧力まで昇圧して保持状態とし、圧力変動
を１分間以上計測して、損傷もしくは破断の有無を判定
するようになされており、確実に膜の損傷もしくは破断
の有無を判断することができる。According to the present invention, when a value equal to or more than a predetermined value is measured for a predetermined time by the turbidity detecting means, it is determined that there is a possibility of damage or breakage of the filtration membrane of the membrane filtration device, and furthermore, By the pressure means, the pressure is raised to a pressure lower than the bubbling point of the filtration membrane to maintain the pressure, the pressure fluctuation is measured for 1 minute or more, and the presence or absence of damage or breakage is determined. The presence or absence of breakage can be determined.
【００２２】また、請求項６の発明は、中空糸膜による
ＵＦ膜もしくはＭＦ膜からなるろ過膜を有する膜ろ過装
置の運転方法において、前記膜ろ過装置の通常運転時、
膜ろ過水の流出側に備えられた濁度検出手段によって、
該膜ろ過水中の微粒子または濁度を測定し、その値が所
定値以上であって、所定時間以上計測した場合、前記膜
ろ過装置のろ過膜の損傷もしくは破断の可能性があると
判定する工程と、前記工程の後、前記膜ろ過装置のろ過
膜の損傷もしくは破断の可能性がない場合は通常運転を
継続し、前記膜ろ過装置のろ過膜の損傷もしくは破断の
可能性があると判断された場合は、前記膜ろ過装置のろ
過膜の外側に被処理水を保持した状態で、該ろ過膜の内
側に除菌フィルタを通して、該ろ過膜のバブリングポイ
ント未満の圧力まで昇圧した空気を供給して前記加圧状
態を保持し、圧力計測手段によって該ろ過膜の内側の圧
力を１分間以上計測し、その計測値から圧力保持率を算
出して、該圧力保持率が所定値以上であるか否かを判定
して、前記ろ過膜の損傷および破断が発生していないと
判断された場合は通常運転とし、有りと判断された場合
は、前記膜ろ過水への通水を停止する膜ろ過装置の運転
方法である。The invention according to claim 6 is a method for operating a membrane filtration device having a filtration membrane comprising a UF membrane or a MF membrane using a hollow fiber membrane, wherein the membrane filtration device is operated in a normal operation mode.
By turbidity detection means provided on the outflow side of the membrane filtration water,
A step of measuring fine particles or turbidity in the membrane filtration water and determining that there is a possibility of damage or breakage of the filtration membrane of the membrane filtration device when the value is equal to or more than a predetermined value and measured for a predetermined time or more. After the step, if there is no possibility of damage or breakage of the filtration membrane of the membrane filtration device, normal operation is continued, and it is determined that there is a possibility of damage or breakage of the filtration membrane of the membrane filtration device. In the case where the water to be treated is held outside the filtration membrane of the membrane filtration device, air that has been pressurized to a pressure below the bubbling point of the filtration membrane is supplied through a sterilization filter inside the filtration membrane. The pressurized state is maintained, and the pressure inside the filtration membrane is measured by the pressure measuring means for 1 minute or more, and the pressure retention rate is calculated from the measured value, and whether the pressure retention rate is a predetermined value or more. Determine whether or not the filtration membrane If damage and breakage is determined not to have occurred and normal operation, when it is determined that there is a method of operating a membrane filtration system to stop water flow to the membrane filtration water.
【００２３】この発明によれば、膜ろ過装置のろ過膜モ
ジュールの損傷もしくは破断が発生したか否かを判断し
ながら、原水の膜ろ過処理を行っており、損傷もしくは
破断検出を確実になし得るように、損傷もしくは破断の
可能性を検出した際に、直ちに膜ろ過装置による水処理
を直ちに停止することなく、ろ過膜モジュールの供給側
に被処理水を保持した状態で、ろ過膜モジュールのろ過
側に加圧空気を供給して、加圧状態を所定時間以上保持
して、その圧力値の変動を測定し、その計測値に基づい
て圧力保持率を算出し、その圧力保持率からろ過膜の損
傷および破断が発生しているか否かを判定し、その上
で、損傷および破断が発生していると判断された場合、
初めて、ろ過膜モジュールへの被処理水の供給を遮断し
て、膜モジュールの交換を実施するようにして、膜ろ過
装置を運転する。According to the present invention, the raw water is subjected to the membrane filtration while judging whether or not the filtration membrane module of the membrane filtration device has been damaged or broken, so that the damage or the break can be reliably detected. As described above, when the possibility of damage or breakage is detected, without immediately stopping the water treatment by the membrane filtration device, the filtration of the filtration membrane module is performed while the water to be treated is held on the supply side of the filtration membrane module. The pressurized air is supplied to the side, the pressurized state is maintained for a predetermined time or more, the fluctuation of the pressure value is measured, the pressure retention rate is calculated based on the measured value, and the filtration membrane is calculated from the pressure retention rate. It is determined whether damage and rupture have occurred, and if it is determined that damage and rupture have occurred,
For the first time, the supply of the water to be treated to the filtration membrane module is shut off, and the replacement of the membrane module is performed, so that the membrane filtration device is operated.
【００２４】[0024]
【発明の実施の形態】以下、本発明に係る膜ろ過装置の
膜損傷検知装置、その方法、および運転方法の実施の形
態について、図面を参照して説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a membrane damage detecting device for a membrane filtration device, a method thereof, and an operation method according to the present invention will be described below with reference to the drawings.
【００２５】先ず、図１を参照して、本実施形態の膜ろ
過装置の膜損傷検知装置について説明する。同図におい
て、１は循環タンク、２は循環ポンプ、３はＵＦ膜もし
くはＭＦ膜からなるろ過膜モジュール、４は連続型濁度
計（濁度検出手段）、５は制御手段、６〜８は電動弁、
９はコンプレッサ、１０は除菌フィルタ、１１は圧力計
（圧力計測手段）、１２はろ過水送水配管、１３は加圧
空気を抜くため等の配管、１４は圧力調節弁、１５は所
定の圧力に加圧した空気を供給する配管である。なお、
連続型濁度計４の濁度測定原理としては、光反射型、光
散乱型もしくは光透過型等に何れのタイプであってもよ
い。First, referring to FIG. 1, a description will be given of a membrane damage detection device of a membrane filtration device according to the present embodiment. In the figure, 1 is a circulation tank, 2 is a circulation pump, 3 is a filtration membrane module composed of a UF membrane or MF membrane, 4 is a continuous turbidity meter (turbidity detection means), 5 is a control means, and 6 to 8 are Electric valve,
9 is a compressor, 10 is a disinfecting filter, 11 is a pressure gauge (pressure measuring means), 12 is a filtered water supply pipe, 13 is a pipe for removing pressurized air, 14 is a pressure control valve, and 15 is a predetermined pressure. A pipe for supplying air pressurized to In addition,
The turbidity measurement principle of the continuous turbidimeter 4 may be any type such as a light reflection type, a light scattering type or a light transmission type.
【００２６】この膜ろ過装置は、循環タンク１の原水を
循環ポンプ２によって、ろ過膜モジュール３の供給側に
供給して、その一部は、循環水として、ろ過膜モジュー
ル３の供給側から循環タンク１に戻され、残りはろ過膜
モジュール３の供給側からろ過側から透過するろ過水と
に分離する装置であり、ろ過膜モジュール３のろ過側か
らろ過水を次工程へと送水される。ろ過膜モジュール３
のろ過側には、電動弁６を備えたろ過水送水配管１２が
接続され、電動弁６の下流側のろ過水送水配管１２に
は、ろ過水の濁度を測定する連続型濁度計４が備えられ
ている。さらに、ろ過膜モジュール３のろ過側に、加圧
空気を供給する配管１５が接続され、膜ろ過側から電動
弁８、除菌フィルタ１０、圧力調節弁１４、コンプレッ
サ９が設けられている。そして、加圧空気を抜くための
配管１３が設けられ、配管１３には電動弁７と圧力計１
１とが設けられている。圧力計１１は、電動弁７とろ過
膜モジュール３との間の配管１３に設けられている。In this membrane filtration device, the raw water in the circulation tank 1 is supplied by the circulation pump 2 to the supply side of the filtration membrane module 3, and a part thereof is circulated from the supply side of the filtration membrane module 3 as circulating water. The filter is returned to the tank 1 and the remainder is a device that separates the filtered water from the supply side of the filtration membrane module 3 into the filtered water that permeates from the filtration side. The filtered water is sent from the filtration side of the filtration membrane module 3 to the next step. Filtration membrane module 3
A filtration water supply pipe 12 having a motor-operated valve 6 is connected to the filtration side, and a continuous turbidity meter 4 for measuring the turbidity of the filtered water is connected to the filtration water supply pipe 12 downstream of the motor-operated valve 6. Is provided. Further, a pipe 15 for supplying pressurized air is connected to the filtration side of the filtration membrane module 3, and an electric valve 8, a sterilization filter 10, a pressure control valve 14, and a compressor 9 are provided from the membrane filtration side. A pipe 13 for removing pressurized air is provided. The pipe 13 has an electric valve 7 and a pressure gauge 1.
1 is provided. The pressure gauge 11 is provided on a pipe 13 between the motor-operated valve 7 and the filtration membrane module 3.
【００２７】制御手段５は、循環ポンプ２、電動弁６〜
８、圧力調節弁１４、およびコンプレッサ９を制御する
とともに、連続型濁度計４および圧力計１１からの出力
が入力されて、信号処理されている。制御手段５には、
例えば図２に示したような制御プログラムが記憶され、
この制御プログラムによって、これらの機器が制御され
て、ろ過膜モジュール３の中空糸膜の損傷もしくは破断
の有無を判定を行っている。従って、本実施形態の膜損
傷検知装置は、制御手段５と、この制御手段５とシステ
ムを構成する上記の機器から構成されている。The control means 5 includes a circulating pump 2, an electric valve 6 to
8, while controlling the pressure control valve 14 and the compressor 9, outputs from the continuous turbidity meter 4 and the pressure gauge 11 are input and signal-processed. The control means 5 includes:
For example, a control program as shown in FIG. 2 is stored,
The control program controls these devices to determine whether the hollow fiber membrane of the filtration membrane module 3 is damaged or broken. Therefore, the film damage detecting device of the present embodiment is composed of the control means 5 and the above-mentioned devices constituting the control means 5 and the system.
【００２８】先ず、上記膜ろ過装置による原水の膜ろ過
処理について説明する。通常の運転時、循環タンク１に
供給された原水は、循環ポンプ２により膜ろ過モジュ−
ル３に送られて膜ろ過処理される。ろ過膜モジュ−ル３
に供給された原水の一部は、循環水として循環配管を通
して、循環タンク１へ返送され、残りの水は、膜ろ過モ
ジュ−ル３によって、膜ろ過処理される。ろ過水は、ろ
過水送水配管１２を通して送水される。膜ろ過水の一部
は、連続型濁度計４に導いて、その濁度が連続的に計測
される。連続型濁度計４の計測値は、電気信号として制
御手段５へと送られる。なお、膜ろ過装置の運転は、外
圧型のデッドエンド方式もしくはクロスフロー方式で行
う。First, the membrane filtration treatment of raw water by the membrane filtration device will be described. During normal operation, raw water supplied to the circulation tank 1 is supplied to the membrane filtration module by the circulation pump 2.
To the filter 3 for membrane filtration. Filtration membrane module 3
A part of the raw water supplied to the tank is returned to the circulation tank 1 through the circulation pipe as circulation water, and the remaining water is subjected to membrane filtration by the membrane filtration module 3. The filtered water is sent through the filtered water feed pipe 12. Part of the membrane filtered water is led to a continuous turbidity meter 4 where the turbidity is continuously measured. The measurement value of the continuous turbidimeter 4 is sent to the control means 5 as an electric signal. The operation of the membrane filtration device is performed by an external pressure type dead end method or cross flow method.
【００２９】続いて、図１および図２を参照して、膜損
傷検知装置を備える膜ろ過装置の膜損傷検知方法につい
て説明する。なお、膜ろ過装置の運転方法には、膜損傷
検知方法を含んでいる。通常運転時、ろ過モジュール３
は、先に説明したように、原水が循環水と膜ろ過水とに
分離される。膜ろ過水は、ろ過水送水配管１２を流れて
次工程へと送水される。その膜ろ過過程で、ろ過水は、
連続型濁度計４によってその濁度が計測されている（ス
テップＳ１）。その測定値は、制御手段５に入力されて
信号処理される。制御手段５では、連続型濁度計４の測
定値が所定の値を越えたか否かを判定する（ステップＳ
２）。ステップＳ２において、連続型濁度計４の測定値
が所定の値を越えた場合、ステップＳ３に進み、所定値
以上の値を所定時間以上継続して計測する。濁度が所定
の値を越え、所定時間越えた場合には、膜が損傷もしく
は破断した可能性があるとして、ステップＳ４に進み、
制御信号Ａを出力して、ステップＳ５に進む。ステップ
Ｓ５では、循環ポンプ２を停止して、膜ろ過運転を停止
し、膜ろ過側に設置した電動弁６および７を閉じ（通水
時も閉じた状態）、コンプレッサ９によって圧力空気を
除菌フィルタ１０および電動弁８を通して中空糸内側
に、ろ過膜のバブリングポイント未満の圧力まで昇圧し
た加圧空気を供給して、圧力計１１が所定の圧力に到達
した後、電動弁８を閉じるとともに、コンプレッサ９を
停止する。ろ過側の加圧空気の圧力変化を監視するため
に、圧力計１１の出力値を所定時間計測する。ステップ
Ｓ６に進み、ろ過膜モジュール３のろ過側に加圧空気が
充填されて保持状態とした時点の加圧空気の圧力である
初期充填圧力と、所定時間経過後の圧力計測値（充填圧
力）とから圧力保持率を演算して求める。ステップＳ７
に進み、圧力保持率が所定値以上か否かを判定して、所
定値以上であれば、ステップＳ８に進み、制御信号Ｃを
出力して、ステップＳ１に戻る。所定値以下であれば、
膜モジュールに損傷もしくは破断が発生しているものと
して、制御信号Ｂを出力する（ステップＳ９）。そし
て、ステップＳ１０に進み、ろ過膜モジュール３の中空
糸膜による膜モジュールを交換して、ステップＳ１に戻
り、通常運転を繰り返す。Next, with reference to FIGS. 1 and 2, a method of detecting a membrane damage of a membrane filtration device having a membrane damage detection device will be described. The operation method of the membrane filtration device includes a membrane damage detection method. During normal operation, filtration module 3
As described above, raw water is separated into circulating water and membrane filtered water as described above. The membrane filtered water flows through the filtered water supply pipe 12 and is sent to the next step. During the membrane filtration process, the filtered water
The turbidity is measured by the continuous turbidity meter 4 (step S1). The measured value is input to the control means 5 and subjected to signal processing. The control means 5 determines whether or not the measured value of the continuous turbidimeter 4 has exceeded a predetermined value (step S).
2). When the measured value of the continuous turbidimeter 4 exceeds the predetermined value in step S2, the process proceeds to step S3, and the value equal to or more than the predetermined value is continuously measured for a predetermined time. If the turbidity exceeds a predetermined value and exceeds a predetermined time, it is determined that the membrane may be damaged or broken, and the process proceeds to step S4.
The control signal A is output, and the process proceeds to step S5. In step S5, the circulating pump 2 is stopped, the membrane filtration operation is stopped, the motor-operated valves 6 and 7 installed on the membrane filtration side are closed (the state is also closed when water is passed), and the compressor 9 removes the compressed air. Pressurized air is supplied to the inside of the hollow fiber through the filter 10 and the electric valve 8 to a pressure lower than the bubbling point of the filtration membrane, and after the pressure gauge 11 reaches a predetermined pressure, the electric valve 8 is closed, The compressor 9 is stopped. In order to monitor the pressure change of the pressurized air on the filtration side, the output value of the pressure gauge 11 is measured for a predetermined time. Proceeding to step S6, the initial filling pressure, which is the pressure of the pressurized air when the pressurized air is filled into the filtration side of the filtration membrane module 3 to be in the holding state, and the pressure measurement value (filling pressure) after a lapse of a predetermined time The pressure holding ratio is calculated and calculated from the above. Step S7
Then, it is determined whether the pressure holding ratio is equal to or greater than a predetermined value. If the pressure holding ratio is equal to or greater than the predetermined value, the process proceeds to step S8, where the control signal C is output, and the process returns to step S1. If it is below the predetermined value,
The control signal B is output assuming that the membrane module is damaged or broken (step S9). Then, the process proceeds to step S10, where the membrane module of the filtration membrane module 3 using the hollow fiber membrane is replaced, and the process returns to step S1 to repeat the normal operation.
【００３０】なお、ステップＳ７において、その値が所
定値以上であった場合は、制御信号Ｃを出力し、電動弁
７を開くことによって、配管１３を介して膜モジュール
３のろ過側の圧力が解放され、圧力計１１の出力値が所
定値以下となった後、電動弁７を閉じる。その後、循環
ポンプ２を作動させることによって、ろ過膜モジュール
３への通水を再会させる。一方、その値が所定値未満で
あった場合は、ステップＳ９に進み、制御信号Ａを出力
し、膜損傷もしくは破断の発生を警報音や表示灯による
警告表示による報知して、運転管理者に膜モジュールの
交換を促す。In step S7, if the value is equal to or more than the predetermined value, the control signal C is output and the electric valve 7 is opened, so that the pressure on the filtration side of the membrane module 3 through the pipe 13 is increased. After being released and the output value of the pressure gauge 11 becomes equal to or less than a predetermined value, the electric valve 7 is closed. Thereafter, by operating the circulation pump 2, the water flow to the filtration membrane module 3 is re-established. On the other hand, if the value is less than the predetermined value, the process proceeds to step S9, in which the control signal A is output, and the occurrence of film damage or breakage is notified by an alarm sound or a warning display by an indicator lamp, and the operation manager is notified. Prompt replacement of membrane module.
【００３１】なお、ろ過膜モジュール３のろ過膜側に供
給される加圧空気は、ろ過膜モジュール３の供給側の原
水を抜いた場合と、原水を抜かない場合での膜損傷の判
定の容易性について、従来技術の膜ろ過装置で実験を行
った。その結果を、図６で説明する。図６（ａ）は、ろ
過膜モジュール３の中空糸膜の外側（供給側）を水で満
たした状態で中空糸膜の内側（ろ過水側）に空気を供給
して、膜のバブリングポイント未満の圧力まで昇圧後、
電動弁を閉じた場合の圧力変化を示している。図６
（ｂ）は、ろ過膜モジュール３の中空糸膜の外側（供給
側）の水を抜いた状態で、中空糸膜の内側（ろ過水側）
に空気を供給して、膜のバブリングポイント未満の圧力
まで昇圧後、電動弁を閉じた場合の圧力変化を示してい
る。The pressurized air supplied to the filtration membrane side of the filtration membrane module 3 makes it easy to judge membrane damage when raw water is removed from the supply side of the filtration membrane module 3 and when raw water is not removed. Experiments were conducted on the properties using a conventional membrane filtration device. The result will be described with reference to FIG. FIG. 6A shows a state in which air is supplied to the inside (filtration water side) of the hollow fiber membrane in a state in which the outside (supply side) of the hollow fiber membrane of the filtration membrane module 3 is filled with water, and the air is supplied to a portion below the bubbling point of the membrane. After raising the pressure to
The pressure change when the motor-operated valve is closed is shown. FIG.
(B) is a state in which water on the outside (supply side) of the hollow fiber membrane of the filtration membrane module 3 is drained, and the inside of the hollow fiber membrane (filtration water side) is removed.
Shows the pressure change when the motor-operated valve is closed after the pressure is increased to a pressure lower than the bubbling point of the membrane by supplying air to the membrane.
【００３２】図６（ａ），（ｂ）の比較から明らかなよ
うに、中空糸膜の外側に水を満たした状態で、中空糸膜
の内側に空気を供給した場合の方が、膜損傷（中空糸に
切断が生じていない状態）時における圧力降下が大きく
なり、膜正常時と膜損傷との検出が容易に判定すること
ができる。従って、膜損傷検出には、供給側の原水を抜
かない状態で、中空糸膜の外側（供給側）に水を満たし
た状態で、中空糸膜の内側（ろ過水側）に空気を供給し
て、膜損傷検出を実施する。As is clear from the comparison of FIGS. 6A and 6B, when the air is supplied to the inside of the hollow fiber membrane while the outside of the hollow fiber membrane is filled with water, the membrane is damaged. The pressure drop during (a state in which the hollow fiber is not cut) increases, and it is possible to easily determine that the membrane is normal and that the membrane is damaged. Therefore, for membrane damage detection, air is supplied to the inside (filtration water side) of the hollow fiber membrane while the outside (supply side) of the hollow fiber membrane is filled with water without draining the raw water on the supply side. Then, the film damage is detected.
【００３３】なお、本実施形態による膜損傷検知装置に
よる測定時間に対する圧力保持率が図３の（イ）〜
（ニ）に示されている。従来例でも説明したように、
（イ）は、膜の状態が正常な場合、（ロ）は、１本の中
空糸を人為的に損傷を与えた場合（破断していない状
態）、（ハ）は、１本の中空糸を人為的に破断させた場
合、（ニ）は、３本の中空糸を破断させた場合をそれぞ
れ示している。この図から明らかなように、正常時と膜
損傷時と確実に検出できることを示している。Incidentally, the pressure holding ratio with respect to the measurement time by the film damage detecting device according to the present embodiment is shown in FIG.
It is shown in (d). As explained in the conventional example,
(A) is the case where the state of the membrane is normal, (B) is the case where one hollow fiber is artificially damaged (the state is not broken), and (C) is the one hollow fiber (D) shows the case where three hollow fibers were broken, respectively. As is apparent from this figure, it is shown that the normal state and the film damage state can be reliably detected.
【００３４】[0034]
【実施例】以下、本実施例の膜損傷検知装置、その方
法、およびその運転方法の一例について、図１を参照し
て説明する。ろ過膜モジュール３の仕様は、従来例で説
明したものと同じものであり、５０００本の中空糸で構
成された膜モジュールであり、膜材質は、ＰＡＮ、膜の
分画分子量は、１３，０００Dalton、中空糸外径は、
１．４ｍｍ、総膜面積は、４１ｍ2 である。連続型濁度
計４は、光散乱方式であり、濁度の測定間隔は、１回／
１０秒である。この膜ろ過膜は、外圧型クロスフローろ
過方式による処理を行った。なお、この実施例によっ
て、本発明を限定するものではない。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an example of a film damage detecting device, a method thereof, and an operation method thereof according to the present embodiment will be described with reference to FIG. The specifications of the filtration membrane module 3 are the same as those described in the conventional example, a membrane module composed of 5000 hollow fibers, the membrane material is PAN, and the molecular weight cut off of the membrane is 13,000 Dalton. , The outer diameter of the hollow fiber is
1.4 mm, total membrane area 41 m 2 . The continuous turbidity meter 4 is of a light scattering type, and the measurement interval of turbidity is once /
10 seconds. This membrane filtration membrane was processed by an external pressure type cross flow filtration system. The present invention is not limited by the embodiments.
【００３５】本実施例の膜損傷検知装置は、通常運転時
において、連続型濁度計４の値が０．００３８度（通常
濁度時の１．５倍を基準）を３分間越えた場合、膜が損
傷もしくは破断した可能性があると判断する。その場
合、制御信号Ａが出力されて、循環ポンプ２を停止し、
膜ろ過運転を停止する。その後、ろ過膜モジュール３の
ろ過水側に設置した電動弁６および電動弁７を閉じた後
（電動弁７は通水時も閉じた状態）、コンプレッサ９に
よって圧力空気を除菌フィルタ１０と電動弁８とを通し
て中空糸内側（ろ過側）に供給して、電動弁７とろ過膜
モジュール３との間に設置した圧力計１１が１００ＫＰ
ａの圧力を指示した後、電動弁８と閉じるとともに、コ
ンプレッサ９を停止する。その後、圧力計１１の出力値
を３分間計測することによって、初期充填圧力と圧力測
定値とから圧力保持率を制御手段５によって演算する。The membrane damage detecting device of the present embodiment has a case where the value of the continuous turbidimeter 4 exceeds 0.0038 degrees (based on 1.5 times the normal turbidity) for 3 minutes during normal operation. It is determined that the membrane may be damaged or broken. In that case, the control signal A is output and the circulation pump 2 is stopped,
Stop the membrane filtration operation. Then, after closing the motor-operated valve 6 and the motor-operated valve 7 installed on the filtered water side of the filtration membrane module 3 (the motor-operated valve 7 is also closed during the passage of water), the compressor 9 removes the pressurized air from the sterilization filter 10 and electrically operates. The pressure is supplied to the inside of the hollow fiber (filtration side) through the valve 8 and the pressure gauge 11 installed between the motor-operated valve 7 and the filtration membrane module 3 has a pressure of 100 KP.
After instructing the pressure of a, the motor-operated valve 8 is closed and the compressor 9 is stopped. Thereafter, the output value of the pressure gauge 11 is measured for 3 minutes, and the control means 5 calculates the pressure holding ratio from the initial filling pressure and the measured pressure value.
【００３６】なお、圧力保持率は、以下の式で演算し
た。 ［圧力保持率］＝１００×［所定時間後の充填圧力］／
［初期充填圧力］The pressure holding ratio was calculated by the following equation. [Pressure holding ratio] = 100 × [filling pressure after predetermined time] /
[Initial filling pressure]
【００３７】上記実施例において、ろ過膜モジュール３
の中空糸膜が正常な場合、ろ過膜側の加圧空気を保持し
て３分後のろ過膜側の加圧空気の圧力測定値を、上記式
により演算処理して求められた圧力保持率は、９９％で
あった。また、中空糸膜が損傷した場合、加圧保持して
から３分後の圧力保持率は、６６％であった。そして、
中空糸膜が１本破断した場合の３分後の圧力保持率は、
６４％であり、膜が３本破断した場合の３分後の圧力保
持率は２４％であった。In the above embodiment, the filtration membrane module 3
When the hollow fiber membrane is normal, the pressure retention rate obtained by calculating the pressure measurement value of the pressurized air on the filtration membrane side 3 minutes after retaining the pressurized air on the filtration membrane side by the above formula is used. Was 99%. Further, when the hollow fiber membrane was damaged, the pressure holding ratio 3 minutes after the pressure holding was 66%. And
The pressure holding ratio after 3 minutes when one hollow fiber membrane is broken is
It was 64%, and the pressure retention after 3 minutes when three membranes were broken was 24%.
【００３８】すなわち、この実施例では、３分後の圧力
保持率が、９５％以上であった場合は、制御信号Ｃを出
力し、電動弁７を開くことによって、ろ過膜モジュール
３のろ過側の圧力を解放し、圧力計１１の出力値が所定
値以下となった後に、電動弁７を閉じて、循環ポンプ２
を作動させて、ろ過膜モジュール３への通水を再開させ
て、通常運転とした。That is, in this embodiment, when the pressure holding ratio after 3 minutes is 95% or more, the control signal C is output and the motor-operated valve 7 is opened, whereby the filtration side of the filtration membrane module 3 is opened. Is released, and after the output value of the pressure gauge 11 becomes equal to or less than a predetermined value, the electric valve 7 is closed and the circulation pump 2 is closed.
Was operated to restart the flow of water to the filtration membrane module 3, and normal operation was performed.
【００３９】また、ろ過膜側の加圧空気を保持してから
３分経過後の圧力保持率が９５％未満であった場合は、
ろ過膜モジュール３の膜損傷もしくは破断が発生したも
のと判断し、制御信号Ｂを出力して、「膜損傷もしくは
破断有り」を報知して、膜モジュールの交換を行った。When the pressure retention rate after 3 minutes from retaining the pressurized air on the filtration membrane side is less than 95%,
It was determined that the membrane damage or breakage of the filtration membrane module 3 had occurred, and the control signal B was output to notify "there is a membrane damage or breakage", and the membrane module was replaced.
【００４０】上述の実施例のように、膜損傷検知のため
のシーケンス制御を実施することによって、自動的にろ
過膜モジュール３の中空糸膜の正常時と損傷時もしくは
破断時とを精度よく判断することが可能である。膜損傷
もしくは破断が発生した場合、膜ろ過装置の運転管理者
は、制御信号Ｂの発生に基づいて、表示、報知によって
認知して、ろ過膜モジュール３の中空糸膜による膜モジ
ュールを交換することにより、膜損傷もしくは破断が発
生したにもかかわらず、正常であると判断して放置し、
報知ろ過水にクリプトスポリジューム等の病原性微生物
が混入するのを阻止することができた。As in the above-described embodiment, by executing the sequence control for detecting the membrane damage, the normal state and the damaged or broken state of the hollow fiber membrane of the filtration membrane module 3 are automatically determined with high accuracy. It is possible to When the membrane damage or breakage occurs, the operation manager of the membrane filtration device recognizes by display and notification based on the generation of the control signal B, and replaces the membrane module of the filtration membrane module 3 with the hollow fiber membrane. In spite of the occurrence of film damage or rupture, it was judged normal and left
It was possible to prevent pathogenic microorganisms such as Cryptosporidium from being mixed into the notification filtered water.
【００４１】[0041]
【発明の効果】以上述べたように、本発明によれば、膜
ろ過装置の膜ろ過側に設置した連続型濁度計による計測
値を制御手段に入力して、膜損傷または破断の可能性を
判断し、さらに加圧手段による膜ろ過装置の膜ろ過側の
加圧して、その圧力保持率によって、膜損傷または破断
の発生を検出しており、膜の損傷もしくは破断状態と、
膜の正常状態とを精度よく判断できる利点がある。しか
も膜ろ過装置の膜損傷や破断が極めて短時間に検出する
ことができるので、膜ろ過水の水質が良好であって、極
めて安全性の高い飲料水として膜ろ過水を供給すること
ができる効果を有する。さらに、自動的に膜の損傷もし
くは破断が検出できるので、無用な膜モジュールの交換
を防止することが可能であり、コスト削減に極めて効果
的である。As described above, according to the present invention, the value measured by the continuous turbidity meter installed on the membrane filtration side of the membrane filtration device is input to the control means, and the possibility of membrane damage or breakage is increased. Judgment, further pressurizing the membrane filtration side of the membrane filtration device by the pressurizing means, the occurrence of membrane damage or breakage is detected by the pressure retention rate, and the damage or breakage state of the membrane,
There is an advantage that the normal state of the film can be accurately determined. In addition, since membrane damage or breakage of the membrane filtration device can be detected in a very short time, the quality of the membrane filtration water is good, and the membrane filtration water can be supplied as extremely safe drinking water. Having. Further, since the damage or breakage of the membrane can be automatically detected, it is possible to prevent unnecessary replacement of the membrane module, which is extremely effective for cost reduction.
【００４２】また、本発明によれば、膜ろ過装置の膜の
破損もしくは破断の検知が制御手段でなされるので、熟
練した技術を必要とせず、比較的容易に検知することが
できる膜損傷検知方法であり、膜の損傷を検出した場
合、膜の損傷が制御装置に表示または報知されるので、
直ちに膜モジュールの交換が可能であって、膜ろ過装置
の運転も容易であり、維持管理性に優れている。Further, according to the present invention, since the detection of breakage or breakage of the membrane of the membrane filtration device is performed by the control means, a skilled artisan is not required and the membrane damage detection which can be relatively easily detected. The method is such that when damage to the membrane is detected, the damage to the membrane is displayed or notified to the control device.
The membrane module can be replaced immediately, the operation of the membrane filtration device is easy, and the maintenance and management is excellent.
【図１】本発明に係る膜ろ過装置の膜損傷検知装置にお
ける一実施形態の処理系統、その制御系を示す図であ
る。FIG. 1 is a view showing a processing system and a control system of an embodiment of a membrane damage detecting device of a membrane filtration device according to the present invention.
【図２】本発明における膜損傷検知方法の一例を説明す
るためのフローチャートである。FIG. 2 is a flowchart illustrating an example of a film damage detection method according to the present invention.
【図３】本発明に係る膜損傷検知装置における測定時間
に対する圧力保持率の変化を示した図である。FIG. 3 is a diagram showing a change in a pressure holding ratio with respect to a measurement time in a film damage detection device according to the present invention.
【図４】従来の膜ろ過装置の膜損傷検知装置を示し、そ
の制御系を示す図である。FIG. 4 is a diagram showing a membrane damage detection device of a conventional membrane filtration device and a control system thereof.
【図５】従来の膜損傷検知装置における膜の各種状態で
の濁度の経時変化を示す図である。FIG. 5 is a diagram showing a temporal change in turbidity in various states of a membrane in a conventional membrane damage detection device.
【図６】従来の膜ろ過装置における膜の正常状態と損傷
状態との圧力保持率の経時変化を示す図である。FIG. 6 is a diagram showing a time-dependent change in a pressure holding ratio between a normal state and a damaged state of a membrane in a conventional membrane filtration device.
１ 循環タンク ２ 循環ポンプ ３ ろ過膜モジュール ４ 連続型濁度計（濁度検出手段） ５ 制御手段 ６〜８ 電動弁 ９ コンプレッサ １０ 除菌フィルタ １１ 圧力計（圧力計測手段） １２ ろ過水送水配管 １３，１５ 配管 １４ 圧力調節弁 DESCRIPTION OF SYMBOLS 1 Circulation tank 2 Circulation pump 3 Filtration membrane module 4 Continuous turbidity meter (turbidity detecting means) 5 Control means 6-8 Motorized valve 9 Compressor 10 Bactericidal filter 11 Pressure gauge (Pressure measuring means) 12 Filtration water supply pipe 13 , 15 Piping 14 Pressure control valve
フロントページの続き Ｆターム(参考） 4D006 GA06 GA07 HA19 JA51A JA52A JA63A JA65A KA12 KA63 KA81 KE06Q KE08Q KE13Q KE22Q KE23Q KE24Q KE28Q LA03 MA33 MC39X PA01 PB04 PB05 PB08 Continued on the front page F term (reference) 4D006 GA06 GA07 HA19 JA51A JA52A JA63A JA65A KA12 KA63 KA81 KE06Q KE08Q KE13Q KE22Q KE23Q KE24Q KE28Q LA03 MA33 MC39X PA01 PB04 PB05 PB08
Claims (6)
らなるろ過膜を有する膜ろ過装置に設けられた膜損傷検
知装置において、 前記膜ろ過装置の膜ろ過水の流出側に、該膜ろ過水中の
微粒子または濁度を測定する濁度検出手段を備え、該濁
度検出手段が所定値以上の値を所定時間以上計測した場
合、前記膜ろ過装置のろ過膜の損傷もしくは破断の可能
性があるものと判定して、加圧手段によって浄化もしく
は除菌化した加圧空気を前記ろ過装置の膜ろ過水の流出
側に供給して保持状態とし、前記加圧空気の圧力保持率
によって、前記膜ろ過装置のろ過膜の損傷もしくは破断
の有無を判定する制御手段を備えることを特徴とする膜
損傷検知装置。1. A membrane damage detection device provided in a membrane filtration device having a UF membrane or a MF membrane formed by a hollow fiber membrane, wherein the membrane filtration water is provided on the outflow side of the membrane filtration water of the membrane filtration device. Turbidity detecting means for measuring the fine particles or turbidity of the filter, when the turbidity detecting means measures a value equal to or more than a predetermined value for a predetermined time or more, there is a possibility that the filtration membrane of the membrane filtration device is damaged or broken. The pressurized air purified or sterilized by the pressurizing means is supplied to the outflow side of the membrane filtration water of the filtration device to be kept in a holding state. A membrane damage detection device comprising a control unit for determining whether or not a filtration membrane of a filtration device is damaged or broken.
らなるろ過膜を有する膜ろ過装置に設けられた膜損傷検
知装置において、 前記膜ろ過装置の膜ろ過水の流出側に設けられ、該膜ろ
過水中の微粒子または濁度を測定する濁度検出手段と、 前記膜ろ過装置の膜ろ過水の流出側に除菌フィルタを通
過した加圧空気を供給する加圧手段と、 前記膜ろ過装置の膜ろ過水の流出側に加えられた前記加
圧空気を保持状態とするための遮断手段と、 前記遮断手段によって、前記流出側に加えられた加圧空
気を保持して、前記膜ろ過装置の膜ろ過水側の圧力を測
定する圧力計測手段と、 前記循環ポンプの駆動制御と、前記遮断手段の開閉制御
とを行うとともに、前記濁度検出手段の計測値を処理し
て、所定値以上の値が所定時間以上であるか否かを判定
し、前記膜ろ過装置のろ過膜の損傷もしくは破断の可能
性を判定し、前記膜ろ過装置の損傷もしくは破断の可能
性が有ると判定された場合、前記加圧手段を作動させた
後、前記遮断手段を作動させて加圧空気を保持状態と
し、その加圧空気の測定値から圧力保持率を算出し、そ
の値が所定値以上であるか否かを判定して、前記膜ろ過
装置のろ過膜の損傷もしくは破断の有無を判定する制御
手段と、 を備えることを特徴とする膜損傷検知装置。2. A membrane damage detection device provided in a membrane filtration device having a UF membrane or a MF membrane formed of a hollow fiber membrane, wherein the membrane damage detection device is provided on an outflow side of membrane filtration water of the membrane filtration device. Turbidity detecting means for measuring fine particles or turbidity in the filtered water; pressurizing means for supplying pressurized air that has passed through a sterilization filter to the outflow side of the membrane filtered water of the membrane filtration device; A shutoff means for holding the pressurized air added to the outflow side of the membrane filtration water, and a pressurized air added to the outflow side by the shutoff means, Pressure measurement means for measuring the pressure on the membrane filtration water side, drive control of the circulating pump, while performing the opening and closing control of the blocking means, processing the measured value of the turbidity detecting means, a predetermined value or more Determines whether the value is longer than a specified time Determining the possibility of damage or breakage of the filtration membrane of the membrane filtration device, if it is determined that there is a possibility of damage or breakage of the membrane filtration device, after the actuation of the pressurizing means, the cutoff Activating the means to keep the pressurized air in a holding state, calculating the pressure holding ratio from the measured value of the pressurized air, determining whether the value is equal to or more than a predetermined value, and filtering the membrane filtration device. Control means for determining the presence or absence of damage or breakage of the film.
くは連続型微粒子検出器であって、前記制御手段が、前
記濁度検出手段の計測値を処理して、所定値以上の値を
所定時間以上を計測した場合、前記膜ろ過装置のろ過膜
に損傷もしくは破断の可能性があるものと判定して、警
告するために制御信号Ａを出力し、該制御信号Ａに基づ
いて、前記加圧手段を作動させて、前記加圧空気を保持
状態とし、その圧力値から圧力保持率を算出して、その
値が所定値以上であるか否かを判定して、所定値未満で
ある場合、前記膜ろ過装置のろ過膜の損傷もしくは破断
を有するものとして制御信号Ｂを出力して、その値が所
定値以上である場合、前記膜ろ過装置のろ過膜の損傷も
しくは破断を有しないものとして制御信号Ｃを出力する
シーケンス制御によることを特徴とする請求項１または
２に記載の膜損傷検知装置。3. The turbidity detecting means is a continuous turbidity meter or a continuous fine particle detector, and the control means processes a measured value of the turbidity detecting means to obtain a value equal to or more than a predetermined value. When measuring a predetermined time or more, it is determined that there is a possibility of damage or breakage of the filtration membrane of the membrane filtration device, and outputs a control signal A to warn, based on the control signal A, Activate the pressurizing means, hold the pressurized air in a holding state, calculate a pressure holding ratio from the pressure value, determine whether the value is equal to or greater than a predetermined value, and determine whether the value is less than a predetermined value. In some cases, the control signal B is output as having the damage or breakage of the filtration membrane of the membrane filtration device, and when the value is equal to or more than a predetermined value, the filtration membrane of the membrane filtration device has no damage or breakage. Sequence control that outputs the control signal C The film damage detecting device according to claim 1, wherein
らなるろ過膜を有する膜ろ過装置の膜損傷検知方法にお
いて、 前記膜ろ過装置の膜ろ過水の流出側に備えられた濁度検
出手段によって、該膜ろ過水中の微粒子または濁度を測
定し、その計測値が所定値以上であって、その値を所定
時間以上計測した場合、前記膜ろ過装置のろ過膜の損傷
もしくは破断の可能性があるものと判定し、加圧手段に
よって浄化もしくは除菌化した加圧空気を前記ろ過装置
の膜ろ過水の流出側に供給して保持し、その加圧空気の
圧力保持率によって、前記膜ろ過装置のろ過膜の損傷も
しくは破断の有無を判定することを特徴とする膜損傷検
知方法。4. A method for detecting a membrane damage of a membrane filtration device having a filtration membrane comprising a UF membrane or an MF membrane by a hollow fiber membrane, wherein the turbidity detection means provided on the outflow side of the membrane filtration water of the membrane filtration device. Measuring the fine particles or turbidity in the membrane filtration water, the measured value is a predetermined value or more, if the value is measured for a predetermined time or more, there is a possibility of damage or breakage of the filtration membrane of the membrane filtration device. The pressurized air purified or sterilized by the pressurizing means is supplied to and held on the outflow side of the membrane filtration water of the filtration device, and the membrane filtration is performed according to the pressure retention rate of the pressurized air. A method for detecting damage to a membrane, comprising determining whether a filtration membrane of the apparatus is damaged or broken.
らなるろ過膜を有する膜ろ過装置の膜損傷検知方法にお
いて、 前記膜ろ過水の流出側に備えられた濁度検出手段によっ
て、該膜ろ過水中の微粒子または濁度を測定し、その値
が所定値以上であって、所定時間以上計測した場合、前
記膜ろ過装置のろ過膜の損傷もしくは破断の可能性があ
るものと判定する第１の工程と、 前記第１の工程の後、前記膜ろ過装置のろ過膜の外側に
被処理水を保持した状態で、加圧手段によって、該ろ過
膜の内側に除菌フィルタを通して、該ろ過膜のバブリン
グポイント未満の圧力まで昇圧した空気を供給して、そ
の加圧状態を保持し、圧力計測手段によって該ろ過膜の
内側の圧力を１分間以上計測し、その計測値から圧力保
持率を算出して、該圧力保持率が所定値以上であるか否
かによって、前記ろ過膜の損傷および破断の有無を判断
する第２の工程とを有することを特徴とする膜損傷検知
方法。5. A method for detecting a membrane damage of a membrane filtration device having a filtration membrane comprising a UF membrane or an MF membrane by a hollow fiber membrane, wherein the membrane filtration is performed by a turbidity detection means provided on an outflow side of the membrane filtration water. First, it is determined that there is a possibility of damage or breakage of the filtration membrane of the membrane filtration device when the particle or turbidity in water is measured and the value is equal to or more than a predetermined value and measured for a predetermined time or more. And after the first step, in a state where the water to be treated is held outside the filtration membrane of the membrane filtration device, by a pressurizing means, a sterilization filter is passed through the inside of the filtration membrane to form the filtration membrane. Supply the air pressurized to a pressure lower than the bubbling point, maintain the pressurized state, measure the pressure inside the filtration membrane for 1 minute or more by the pressure measuring means, and calculate the pressure retention rate from the measured value. And the pressure holding ratio is Depending whether or not value or more, membrane damage detection method characterized by a second step of determining the presence or absence of damage and breakage of the filtration membrane.
らなるろ過膜を有する膜ろ過装置の運転方法において、 前記膜ろ過装置の通常運転時、膜ろ過水の流出側に備え
られた濁度検出手段によって、該膜ろ過水中の微粒子ま
たは濁度を測定し、その値が所定値以上であって、所定
時間以上計測した場合、前記膜ろ過装置のろ過膜の損傷
もしくは破断の可能性があると判定する工程と、 前記工程の後、前記膜ろ過装置のろ過膜の損傷もしくは
破断の可能性がない場合は通常運転を継続し、前記膜ろ
過装置のろ過膜の損傷もしくは破断の可能性があると判
断された場合は、前記膜ろ過装置のろ過膜の外側に被処
理水を保持した状態で、該ろ過膜の内側に除菌フィルタ
を通して、該ろ過膜のバブリングポイント未満の圧力ま
で昇圧した空気を供給して前記加圧状態を保持し、圧力
計測手段によって該ろ過膜の内側の圧力を１分間以上計
測し、その計測値から圧力保持率を算出して、該圧力保
持率が所定値以上であるか否かを判定して、前記ろ過膜
の損傷および破断が発生していないと判断された場合は
通常運転とし、有りと判断された場合は、前記膜ろ過水
への通水を停止する膜ろ過装置の運転方法。6. An operation method of a membrane filtration device having a filtration membrane composed of a UF membrane or an MF membrane using a hollow fiber membrane, wherein during normal operation of the membrane filtration device, turbidity detection provided on an outflow side of the membrane filtration water is performed. By means, the fine particles or turbidity in the membrane filtration water is measured, and the value is equal to or more than a predetermined value, and when measured for a predetermined time or more, there is a possibility that the filtration membrane of the membrane filtration device may be damaged or broken. After the step of determining, after the step, if there is no possibility of damage or breakage of the filtration membrane of the membrane filtration device, continue normal operation, there is a possibility of damage or breakage of the filtration membrane of the membrane filtration device When it is determined that the water to be treated is held outside the filtration membrane of the membrane filtration device, the air is pressurized to a pressure lower than the bubbling point of the filtration membrane through a sterilization filter inside the filtration membrane. Supply Holding the pressurized state, measuring the pressure inside the filtration membrane for 1 minute or more by a pressure measuring means, calculating a pressure holding ratio from the measured value, and determining whether the pressure holding ratio is a predetermined value or more. When it is determined that no damage and breakage of the filtration membrane has occurred, the normal operation is performed, and when it is determined that the filtration membrane is present, the filtration of the filtration membrane is stopped. Driving method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11087615A JP2000279770A (en) | 1999-03-30 | 1999-03-30 | Membrane failure detector of membrane filter device, method therefor and operating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11087615A JP2000279770A (en) | 1999-03-30 | 1999-03-30 | Membrane failure detector of membrane filter device, method therefor and operating method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000279770A true JP2000279770A (en) | 2000-10-10 |
Family
ID=13919891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11087615A Pending JP2000279770A (en) | 1999-03-30 | 1999-03-30 | Membrane failure detector of membrane filter device, method therefor and operating method |
Country Status (1)
| Country | Link |
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| JP (1) | JP2000279770A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002224544A (en) * | 2001-02-01 | 2002-08-13 | Jms Co Ltd | Leakage test method for hollow yarn membrane module |
| JP2006289309A (en) * | 2005-04-14 | 2006-10-26 | Fuji Electric Systems Co Ltd | Membrane breakage diagnostic method of membrane filter and its apparatus |
| JP2007007567A (en) * | 2005-06-30 | 2007-01-18 | Hitachi Ltd | Membrane filtration apparatus |
| JP2007245069A (en) * | 2006-03-17 | 2007-09-27 | Fuji Electric Systems Co Ltd | Highly reliable method and system for detecting fracture of membrane |
| JP2007245104A (en) * | 2006-03-20 | 2007-09-27 | Hitachi Ltd | Method for detecting membrane damage in membrane filtration process |
| JP2009233650A (en) * | 2008-10-27 | 2009-10-15 | Hitachi Ltd | Operation control method of membrane filtration apparatus |
| KR101045263B1 (en) * | 2009-04-23 | 2011-06-29 | 주식회사 대우엔텍 | Controlling apparatus for improving stability on maintenance for water purification systems by membrane filters and method thereof |
| JP6807480B1 (en) * | 2020-07-07 | 2021-01-06 | 岩井ファルマテック株式会社 | Processing system with membrane monitoring function |
-
1999
- 1999-03-30 JP JP11087615A patent/JP2000279770A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002224544A (en) * | 2001-02-01 | 2002-08-13 | Jms Co Ltd | Leakage test method for hollow yarn membrane module |
| JP2006289309A (en) * | 2005-04-14 | 2006-10-26 | Fuji Electric Systems Co Ltd | Membrane breakage diagnostic method of membrane filter and its apparatus |
| JP4728684B2 (en) * | 2005-04-14 | 2011-07-20 | メタウォーター株式会社 | Membrane filter diagnosis method and apparatus for membrane filtration |
| JP2007007567A (en) * | 2005-06-30 | 2007-01-18 | Hitachi Ltd | Membrane filtration apparatus |
| JP2007245069A (en) * | 2006-03-17 | 2007-09-27 | Fuji Electric Systems Co Ltd | Highly reliable method and system for detecting fracture of membrane |
| JP2007245104A (en) * | 2006-03-20 | 2007-09-27 | Hitachi Ltd | Method for detecting membrane damage in membrane filtration process |
| JP2009233650A (en) * | 2008-10-27 | 2009-10-15 | Hitachi Ltd | Operation control method of membrane filtration apparatus |
| KR101045263B1 (en) * | 2009-04-23 | 2011-06-29 | 주식회사 대우엔텍 | Controlling apparatus for improving stability on maintenance for water purification systems by membrane filters and method thereof |
| JP6807480B1 (en) * | 2020-07-07 | 2021-01-06 | 岩井ファルマテック株式会社 | Processing system with membrane monitoring function |
| JP2022014746A (en) * | 2020-07-07 | 2022-01-20 | 岩井ファルマテック株式会社 | Processing system with membrane monitoring function |
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