JP3265817B2 - How to operate the filtration module - Google Patents
How to operate the filtration moduleInfo
- Publication number
- JP3265817B2 JP3265817B2 JP07584494A JP7584494A JP3265817B2 JP 3265817 B2 JP3265817 B2 JP 3265817B2 JP 07584494 A JP07584494 A JP 07584494A JP 7584494 A JP7584494 A JP 7584494A JP 3265817 B2 JP3265817 B2 JP 3265817B2
- Authority
- JP
- Japan
- Prior art keywords
- filtration
- membrane
- module
- filtration module
- filtrate
- 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.)
- Expired - Fee Related
Links
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は濾過モジュールの運転方
法とそれに適した濾過モジュールに関するもので、さら
に詳しく言えば、濾過モジュールのランニングコストを
低下させ、濾過容量を増大させることができる濾過モジ
ュールの運転方法とそれに適した濾過モジュールに関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for operating a filtration module and a filtration module suitable for the method. More specifically, the present invention relates to a filtration module capable of reducing the running cost of a filtration module and increasing the filtration capacity. The present invention relates to an operation method and a filtration module suitable for the operation method.
【０００２】[0002]
【従来の技術】濾過モジュールの濾過容量の増大を図る
方法としては、大型のスパイラル式濾過モジュールのよ
うな大容量濾過に適した濾過モジュールを用いる方法が
知られている。2. Description of the Related Art As a method for increasing the filtration capacity of a filtration module, a method using a filtration module suitable for large-capacity filtration such as a large spiral filtration module is known.
【０００３】このようなスパイラル式濾過モジュール
は、貫通穴を設けた集水管に袋状にした濾過膜を巻き付
けて円柱形にして円筒形の容器に収納し、前記集水管の
外側から濾過膜に原液を供給し、濾過膜の内側すなわち
集水管から濾液を得るようにしたもので、その濾過容量
を増大させる場合、袋状にした濾過膜を長くして原液が
通過する濾過膜の面積を増大させている。[0003] In such a spiral filtration module, a bag-shaped filtration membrane is wound around a water collection pipe provided with a through-hole, is formed into a cylindrical shape, and is housed in a cylindrical container. The undiluted solution is supplied and the filtrate is obtained from the inside of the filtration membrane, that is, from the collecting pipe. When the filtration capacity is increased, the bag-shaped filtration membrane is lengthened to increase the area of the filtration membrane through which the undiluted solution passes. Let me.
【０００４】また、一般の濾過モジュールの濾過容量の
増大を図る方法としては、単位時間当りの濾液の線速を
大きくしたり、濾過差圧を大きくする方法がある。Further, as a method for increasing the filtration capacity of a general filtration module, there are methods of increasing the linear velocity of the filtrate per unit time or increasing the filtration pressure difference.
【０００５】[0005]
【発明が解決しようとする課題】上記した従来の濾過モ
ジュールのうち、スパイラル式濾過モジュールは、濾過
容量を増加させるために円柱形にした濾過モジュールの
外径を大きくしても、外周付近では濾液の流路が長くな
って濾過抵抗が大きくなるため、外周付近での濾過はほ
とんど行われず、あまり濾過容量を増加させることがで
きないという問題があった。Among the above-mentioned conventional filtration modules, the spiral filtration module has a structure in which the filtrate is formed near the outer periphery even if the outer diameter of the cylindrical filtration module is increased in order to increase the filtration capacity. Therefore, there is a problem that filtration is hardly performed in the vicinity of the outer periphery and the filtration capacity cannot be increased so much.
【０００６】また、一般の濾過モジュールでは、濾液の
線速を大きくしたり、濾過差圧を大きくすることによっ
て濾過膜が早期に目詰まりを起こし、単位時間当りの濾
過量が小さくなって早期に寿命に達し、濾過モジュール
のランニングコストが高くなるという問題があった。Further, in a general filtration module, the filtration membrane is clogged at an early stage by increasing the linear velocity of the filtrate or increasing the filtration differential pressure, and the filtration amount per unit time is reduced, so that the filtration speed is reduced. There is a problem that the service life is reached and the running cost of the filtration module increases.
【０００７】[0007]
【課題を解決するための手段】上記課題を解決するた
め、請求項１記載の発明は、板状の支持部材に貫通穴を
設け、この貫通穴に平膜またはエンボス加工膜からなる
濾過膜を袋状にしてその開口部が取り付けられてなり、
前記支持部材によって袋状にした濾過膜の内側と外側と
が分離された濾過モジュールを、濾液の線速を１日当た
り０．０７〜１．００ｍとし、濾過差圧を０．００１〜
１．０ｋｇ／ｃｍ2 で運転することを特徴とし、請求項
２記載の発明は、請求項１記載の濾過モジュールに、濾
過膜の目詰まり時に濾過膜の外側に加圧気体送入手段に
よって気泡を当てるようにした目詰まり防止手段を設
け、これを、濾液の線速を１日当たり０．０７〜１．０
０ｍとし、濾過差圧を０．００１〜１．０ｋｇ／ｃｍ2
で運転することを特徴とし、請求項３〜５記載の発明
は、各々プリーツ形濾過モジュール、中空糸膜モジュー
ルおよびスパイラル式濾過モジュールを、濾液の線速を
１日当たり０．０７〜１．００ｍとし、濾過差圧を０．
００１〜１．０ｋｇ／ｃｍ2 で運転することを特徴とす
るものである。According to a first aspect of the present invention, a plate-like support member is provided with a through-hole, and a filtration membrane made of a flat membrane or an embossed membrane is provided in the through-hole. The opening is attached in a bag shape,
The filtration module in which the inside and outside of the filtration membrane formed into a bag by the support member are separated, the linear velocity of the filtrate is set to 0.07 to 1.00 m per day, and the filtration differential pressure is set to 0.001 to 0.001.
According to a second aspect of the present invention, when the filter module is operated at 1.0 kg / cm 2 , air bubbles are supplied to the outside of the filtration membrane by a pressurized gas supply means when the filtration membrane is clogged. Is provided, and the linear velocity of the filtrate is adjusted to 0.07 to 1.0 per day.
0 m, and the filtration pressure difference is 0.001 to 1.0 kg / cm 2
The invention according to claims 3 to 5 is characterized in that the pleated filtration module, the hollow fiber membrane module and the spiral filtration module each have a linear velocity of the filtrate of 0.07 to 1.00 m per day. , The filtration pressure difference is 0.
It is characterized by operating at 001 to 1.0 kg / cm 2 .
【０００８】[0008]
【０００９】[0009]
【００１０】[0010]
【作用】従って、本発明の濾過モジュールの運転方法に
よれば、目詰まり物質が濾過膜に強固にしかも密に付着
するという問題を解消することができる。Therefore, according to the operation method of the filtration module of the present invention, it is possible to solve the problem that the clogging substance firmly and tightly adheres to the filtration membrane.
【００１１】[0011]
【００１２】[0012]
【実施例】以下、実施例により説明する。Embodiments will be described below with reference to embodiments.
【００１３】図１および図２は、本発明の運転方法に適
した濾過モジュールの断面図である。FIGS. 1 and 2 are cross-sectional views of a filtration module suitable for the operation method of the present invention.
【００１４】図１において、１は袋状にした平均孔径が
０．４μｍの精密濾過膜で、その開口部は第１の支持部
材２−１の貫通穴２Ａに接着されて吊り下げられるとと
もに、前記支持部材２−１は第２の支持部材２−２に接
合され、各支持部材２−１，２−２によって濾過膜１の
内側と外側とが分離されてなる。そして、前記濾過膜１
の外側は原液供給口６を有する角形のハウジング３−１
で包囲されてなり、内側は濾液排出口７を有する角形の
ハウジング３−２で包囲されてなる。なお、精密濾過膜
は直径が０．０１〜１０μｍの粒子が濾過できる程度の
孔径を有するものである。In FIG. 1, reference numeral 1 denotes a bag-shaped microfiltration membrane having an average pore diameter of 0.4 μm, the opening of which is adhered to and suspended from a through hole 2A of a first support member 2-1. The support member 2-1 is joined to the second support member 2-2, and the inside and outside of the filtration membrane 1 are separated by the support members 2-1 and 2-2. And the filtration membrane 1
Is a rectangular housing 3-1 having a stock solution supply port 6.
And the inside is surrounded by a rectangular housing 3-2 having a filtrate discharge port 7. The microfiltration membrane has a pore size such that particles having a diameter of 0.01 to 10 μm can be filtered.
【００１５】前記ハウジング３−１，３−２の開口端部
にはフランジ３−１Ａ，３−２Ａが形成され、各フラン
ジ３−１Ａ，３−２Ａ間に前記第２の支持部材２−２と
パッキング５とを介在させてボルト４−１とナット４−
２とによって、各ハウジング３−１，３−２が一体化さ
れてなる。なお、８は濾過膜１の内側に配されたポリプ
ロピレン製の網や合成繊維の不繊布からなるスペーサ
で、濾過膜１内を流れる濾液の流路を確保して濾過抵抗
の増大を抑制するものである。Flanges 3-1A and 3-2A are formed at the open ends of the housings 3-1 and 3-2, and the second support member 2-2 is provided between the flanges 3-1A and 3-2A. 4-1 and nut 4-
2, the housings 3-1 and 3-2 are integrated. Reference numeral 8 denotes a spacer made of a polypropylene mesh or synthetic fiber non-woven fabric disposed inside the filtration membrane 1, which secures a flow path of a filtrate flowing in the filtration membrane 1 and suppresses an increase in filtration resistance. It is.
【００１６】そして、前記濾過膜１の目詰まりを防止す
る目詰まり防止手段として、濾過膜１の外側に気泡９を
当てて目詰まり物質を除去するための加圧気体送入手段
１０を設けたものである。As a means for preventing clogging of the filtration membrane 1, a pressurized gas feeding means 10 for applying bubbles 9 to the outside of the filtration membrane 1 to remove clogging substances is provided. Things.
【００１７】上記した濾過モジュールの運転方法は、濾
過モジュールの原液供給口６から原液を供給し、濾液排
出口７からの濾液の線速が１日当たり０．０７〜１．０
０ｍ、濾過膜１の内外の濾過差圧が０．００１〜１．０
ｋｇ／ｃｍ2 になるように運転するもので、このような
運転方法によれば、原液中の目詰まり物質が濾過膜１に
強固に付着し難く、より好ましくは、前記濾液の線速を
１日当たり０．５ｍ以下にすると、目詰まり物質が濾過
膜１に密に付着し難く、付着しても前記加圧気体送入手
段１０によって容易に除去することができ、そのランニ
ングコストの低下に寄与することができる。In the operation method of the filtration module described above, the undiluted solution is supplied from the undiluted solution supply port 6 of the filtration module, and the linear velocity of the filtrate from the filtrate discharge port 7 is 0.07 to 1.0 per day.
0 m, the filtration pressure difference between the inside and outside of the filtration membrane 1 is 0.001 to 1.0
kg / cm 2 , and according to such an operation method, it is difficult for the clogging substance in the undiluted solution to firmly adhere to the filtration membrane 1, and more preferably, the linear velocity of the filtrate is set to 1 When the thickness is 0.5 m or less per day, the clogging substance is difficult to adhere to the filtration membrane 1 densely, and even if it adheres, the clogging substance can be easily removed by the pressurized gas feeding means 10 and contributes to a reduction in running cost. can do.
【００１８】[0018]
【００１９】[0019]
【００２０】なお、前記濾過膜内外の濾過差圧と１日当
りの濾液の線速との関係は、種々の工業用水を濾過した
結果、濾液排出口７からの濾液の線速が１日当り０．３
ｍ〜０．５ｍになるように運転すると、濾過膜１の内外
の濾過差圧が０．４ｋｇ／ｃｍ2 になるまでの濾過量は
７０ｍ3 以上になり、前記濾液の線速が１日当り０．０
７ｍ〜０．３ｍになるように運転すると、濾過膜１の内
外の濾過差圧が０．４ｋｇ／ｃｍ2 になるまでの濾過量
は１００ｍ3 以上になり、前記濾液の線速が１日当り
０．５ｍ〜１．００ｍになるように運転すると、濾過膜
１の内外の濾過差圧が０．４ｋｇ／ｃｍ2 になるまでの
濾過量は５０ｍ3 〜７０ｍ3 になり、前記濾液の線速が
１日当り１．００ｍ〜１．５０ｍになるように運転する
と、濾過膜１の内外の濾過差圧が０．４ｋｇ／ｃｍ2 に
なるまでの濾過量は２０〜５０ｍ3になり、前記濾液の
線速が１日当り１．５０ｍ以上になるように運転する
と、濾過膜１の内外の濾過差圧が０．４ｋｇ／ｃｍ2 に
なるまでの濾過量は２０ｍ3 以下になることがわかっ
た。The relationship between the filtration pressure difference between the inside and outside of the filtration membrane and the linear velocity of the filtrate per day is as follows. As a result of filtration of various types of industrial water, the linear velocity of the filtrate from the filtrate outlet 7 is reduced to 0. 3
When the operation is performed so that the filtration differential pressure between the inside and outside of the filtration membrane 1 becomes 0.4 kg / cm 2 , the filtration amount becomes 70 m 3 or more, and the linear velocity of the filtrate becomes 0 per day. .0
When the operation is performed so as to be 7 m to 0.3 m, the filtration amount until the filtration pressure difference between the inside and outside of the filtration membrane 1 becomes 0.4 kg / cm 2 becomes 100 m 3 or more, and the linear velocity of the filtrate becomes 0 per day. When the operation is performed so as to be 0.5 m to 1.00 m, the filtration amount until the filtration pressure difference between the inside and outside of the filtration membrane 1 becomes 0.4 kg / cm 2 becomes 50 m 3 to 70 m 3 , and the linear velocity of the filtrate becomes When the operation is performed so as to be 1.00 m to 1.50 m per day, the filtration amount until the filtration pressure difference between the inside and outside of the filtration membrane 1 becomes 0.4 kg / cm 2 becomes 20 to 50 m 3 , When the operation was performed so that the speed became 1.50 m or more per day, it was found that the filtration amount until the filtration pressure difference between the inside and outside of the filtration membrane 1 became 0.4 kg / cm 2 became 20 m 3 or less.
【００２１】上記した濾過モジュールの運転方法に用い
た濾過モジュールの精密濾過膜は平膜であるが、図２の
ように、エンボス加工した精密濾過膜を用いた濾過モジ
ュールに適用することもできる。この場合は、エンボス
加工によって形成された凹凸部によって目詰まり物質が
一様に付着しにくくなり、長期間の使用によって目詰ま
り物質が付着しても、加圧気体送入手段１０からの気泡
９によって目詰まり物質を容易に除去することができ、
濾液の線速を１日当り０．５ｍ以下にすると、加圧気体
送入手段１０を設けていない濾過モジュールの運転方法
に適用しても、濾過モジュールの寿命を長くすることが
できる。The microfiltration membrane of the filtration module used in the above-described operation method of the filtration module is a flat membrane, but can be applied to a filtration module using an embossed microfiltration membrane as shown in FIG. In this case, the clogging substance hardly adheres uniformly due to the uneven portion formed by the embossing process. Even if the clogging substance adheres due to long-term use, the air bubbles 9 from the pressurized gas supply means 10 are removed. Can easily remove the clogging material,
When the linear velocity of the filtrate is 0.5 m or less per day, the life of the filtration module can be prolonged even when applied to the operation method of the filtration module without the pressurized gas supply means 10.
【００２２】そして、上記した加圧気体送入手段１０に
送入する加圧気体としては空気が一般的であるが、酸素
やオゾンを用いることもできる。Air is generally used as the pressurized gas to be sent to the above-mentioned pressurized gas sending means 10, but oxygen or ozone can also be used.
【００２３】上記した濾過モジュールの運転方法は、精
密濾過膜を用いた濾過モジュール以外にも適用すること
ができる。たとえば、中空糸の外部と中空部とが分離さ
れた中空糸膜モジュールに適用すると、逆洗によって目
詰まり物質を容易に除去することができ、それによって
濾過モジュールのランニングコストを低下させることが
できる。The operation method of the filtration module described above can be applied to a filtration module other than a filtration module using a microfiltration membrane. For example, when the present invention is applied to a hollow fiber membrane module in which the outside of the hollow fiber and the hollow part are separated, the clogging substance can be easily removed by backwashing, thereby reducing the running cost of the filtration module. .
【００２４】また、上記した濾過モジュールの運転方法
を、貫通穴を設けた集水管に平膜またはエンボス加工膜
からなる濾過膜を円柱形に巻き付けて円筒形の容器に収
納したスパイラル式濾過モジュールの運転方法に適用す
ると、濾過膜の外周付近での濾過も行うことができ、濾
過モジュールを有効に活用することができる。The above-mentioned operation method of the filtration module is described in a spiral filtration module in which a filtration membrane made of a flat membrane or an embossed membrane is wound around a water collecting pipe provided with a through-hole into a cylindrical shape and stored in a cylindrical container. When applied to the operation method, filtration near the outer periphery of the filtration membrane can be performed, and the filtration module can be effectively used.
【００２５】また、上記した濾過モジュールの運転方法
を、平膜またはエンボス加工膜からなる濾過膜をプリー
ツして円筒形の容器に収納したプリーツ形濾過モジュー
ルの運転方法に適用すると、プリーツした濾過膜の間隙
に目詰まり物質が蓄積されて濾液の流路が閉塞されるの
を防止することができ、濾過モジュールの寿命を長くす
ることができる。Further, when the above-described operation method of the filtration module is applied to an operation method of a pleated filtration module in which a filtration membrane made of a flat membrane or an embossed membrane is pleated and stored in a cylindrical container, the pleated filtration membrane is obtained. Clogging material can be prevented from accumulating in the gap between the liquid crystal and the flow path of the filtrate, and the life of the filtration module can be prolonged.
【００２６】[0026]
【発明の効果】上記した如く、本発明は、濾過モジュー
ルが早期に寿命に達するのを防止することができるの
で、そのランニングコストを低下させることができ、し
かもその運転方法を図１に示した濾過モジュールなどに
適用することによって濾過容量を増大させることができ
る。As described above, according to the present invention, it is possible to prevent the filter module from reaching the end of its service life early, so that its running cost can be reduced and its operation method is shown in FIG. The filtration capacity can be increased by applying to a filtration module or the like.
【図１】本発明の運転方法に適した濾過モジュールの断
面図である。FIG. 1 is a sectional view of a filtration module suitable for the operation method of the present invention.
【図２】本発明の運転方法に適した濾過モジュールの断
面図である。FIG. 2 is a sectional view of a filtration module suitable for the operation method of the present invention.
１ 濾過膜 ２−１ 第１の支持部材 ２−２ 第２の支持部材 ３ 貫通穴 ３−１ ハウジング ３−２ ハウジング ６ 原液供給口 ７ 濾液排出口 ８ スペーサ ９ 気泡 １０ 加圧気体送入手段 DESCRIPTION OF SYMBOLS 1 Filtration membrane 2-1 1st support member 2-2 2nd support member 3 Through-hole 3-1 Housing 3-2 Housing 6 Raw liquid supply port 7 Filtrate discharge port 8 Spacer 9 Bubbles 10 Pressurized gas sending means
───────────────────────────────────────────────────── フロントページの続き (72)発明者 村田 和雄 大阪府高槻市城西町６番６号 株式会社 ユアサ コーポレーション内 審査官 大黒 浩之 (56)参考文献 特開 平４−63195（ＪＰ，Ａ) 特開 昭54−24280（ＪＰ，Ａ) 特開 昭63−104608（ＪＰ，Ａ) 特開 平５−49876（ＪＰ，Ａ) 特開 昭62−180705（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) B01D 61/22 B01D 61/14 510 B01D 63/08 B01D 65/02 520 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Kazuo Murata 6-6 Josaicho, Takatsuki-shi, Osaka Investigator in Yuasa Corporation Hiroyuki Oguro (56) Reference JP-A-4-63195 (JP, A) JP-A-54-24280 (JP, A) JP-A-63-104608 (JP, A) JP-A-5-49876 (JP, A) JP-A-62-180705 (JP, A) (58) Int.Cl. 7 , DB name) B01D 61/22 B01D 61/14 510 B01D 63/08 B01D 65/02 520
Claims (5)
通穴に平膜またはエンボス加工膜からなる濾過膜を袋状
にしてその開口部が取り付けられてなり、前記支持部材
によって袋状にした濾過膜の内側と外側とが分離された
濾過モジュールを、濾液の線速を１日当たり０．０７〜
１．００ｍとし、濾過差圧を０．００１〜１．０ｋｇ／
ｃｍ 2 で運転することを特徴とする濾過モジュールの運
転方法。A through hole is provided in a plate-shaped support member, and a filter membrane made of a flat membrane or an embossed membrane is formed in a bag shape in the through hole, and an opening thereof is attached to the plate member. The filtration module, in which the inside and outside of the filtration membrane are separated from each other, has a linear velocity of the filtrate of 0.07 to
1.00 m , and the filtration pressure difference is 0.001-1.0 kg /
A method for operating a filtration module, wherein the filtration module is operated at cm 2 .
膜の目詰まり時に濾過膜の外側に加圧気体送入手段によ
って気泡を当てるようにした目詰まり防止手段を設け、
これを、濾液の線速を１日当たり０．０７〜１．００ｍ
とし、濾過差圧を０．００１〜１．０ｋｇ／ｃｍ 2 で運
転することを特徴とする濾過モジュールの運転方法。2. The filter module according to claim 1, further comprising: a clogging prevention means for applying air bubbles to the outside of the filtration membrane by a pressurized gas supply means when the filtration membrane is clogged,
The linear velocity of the filtrate is 0.07 to 1.00 m / day.
And operating at a filtration differential pressure of 0.001 to 1.0 kg / cm 2 .
膜をプリーツして円筒形の容器に収納したプリーツ形濾
過モジュールを、濾液の線速を１日当たり０．０７〜
１．００ｍとし、濾過差圧を０．００１〜１．０ｋｇ／
ｃｍ 2 で運転することを特徴とする濾過モジュールの運
転方法。3. A pleated filtration module, in which a filtration membrane made of a flat membrane or an embossed membrane is pleated and stored in a cylindrical container, has a linear velocity of the filtrate of 0.07 to 10% per day.
1.00 m , and the filtration pressure difference is 0.001-1.0 kg /
A method for operating a filtration module, wherein the filtration module is operated at cm 2 .
空糸膜モジュールを、濾液の線速を１日当たり０．０７
〜１．００ｍとし、濾過差圧を０．００１〜１．０ｋｇ
／ｃｍ 2 で運転することを特徴とする濾過モジュールの
運転方法。4. A hollow fiber membrane module in which the outside and the hollow portion of the hollow fiber are separated is subjected to a linear velocity of the filtrate of 0.07 / day.
~ 1.00m , filtration pressure difference 0.001-1.0kg
A method for operating a filtration module, characterized in that the filtration module is operated at / cm 2 .
ボス加工膜からなる濾過膜を円柱形に巻き付けて円筒形
の容器に収納したスパイラル式濾過モジュールを、濾液
の線速を１日当たり０．０７〜１．００ｍとし、濾過差
圧を０．００１〜１．０ｋｇ／ｃｍ 2 で運転することを
特徴とする濾過モジュールの運転方法。5. A spiral filtration module in which a filtration membrane made of a flat membrane or an embossed membrane is wound in a cylindrical shape around a water collecting pipe provided with a through-hole and accommodated in a cylindrical container, and the linear velocity of the filtrate is set to 0 per day. 0.07 to 1.00 m , filtration difference
A method for operating a filtration module, wherein the operation is performed at a pressure of 0.001 to 1.0 kg / cm 2 .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07584494A JP3265817B2 (en) | 1993-04-15 | 1994-04-14 | How to operate the filtration module |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5-113621 | 1993-04-15 | ||
| JP11362193 | 1993-04-15 | ||
| JP07584494A JP3265817B2 (en) | 1993-04-15 | 1994-04-14 | How to operate the filtration module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06343835A JPH06343835A (en) | 1994-12-20 |
| JP3265817B2 true JP3265817B2 (en) | 2002-03-18 |
Family
ID=26417002
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP07584494A Expired - Fee Related JP3265817B2 (en) | 1993-04-15 | 1994-04-14 | How to operate the filtration module |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3265817B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010029824A (en) * | 2008-07-31 | 2010-02-12 | Daicen Membrane Systems Ltd | Filtering method |
-
1994
- 1994-04-14 JP JP07584494A patent/JP3265817B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06343835A (en) | 1994-12-20 |
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