JPH0472569B2 - - Google Patents
Info
- Publication number
- JPH0472569B2 JPH0472569B2 JP60092104A JP9210485A JPH0472569B2 JP H0472569 B2 JPH0472569 B2 JP H0472569B2 JP 60092104 A JP60092104 A JP 60092104A JP 9210485 A JP9210485 A JP 9210485A JP H0472569 B2 JPH0472569 B2 JP H0472569B2
- Authority
- JP
- Japan
- Prior art keywords
- separation device
- fluid separation
- sodium bisulfite
- membrane
- cellulose ester
- 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 - Lifetime
Links
- 239000012528 membrane Substances 0.000 claims description 45
- 238000000926 separation method Methods 0.000 claims description 38
- 239000012530 fluid Substances 0.000 claims description 36
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 claims description 27
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 claims description 27
- 239000000243 solution Substances 0.000 claims description 22
- 229920002678 cellulose Polymers 0.000 claims description 21
- 238000011049 filling Methods 0.000 claims description 11
- 239000007864 aqueous solution Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 8
- 150000005846 sugar alcohols Polymers 0.000 claims description 8
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims description 3
- -1 alkaline earth metal salt Chemical class 0.000 claims description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 22
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 20
- 230000014759 maintenance of location Effects 0.000 description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- 235000011187 glycerol Nutrition 0.000 description 11
- 239000003755 preservative agent Substances 0.000 description 10
- 230000002335 preservative effect Effects 0.000 description 10
- 241000894006 Bacteria Species 0.000 description 8
- 230000001954 sterilising effect Effects 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 6
- 238000001223 reverse osmosis Methods 0.000 description 6
- 230000000844 anti-bacterial effect Effects 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 238000005406 washing Methods 0.000 description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 4
- 239000003761 preservation solution Substances 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- 238000004659 sterilization and disinfection Methods 0.000 description 4
- 229920002284 Cellulose triacetate Polymers 0.000 description 3
- NNLVGZFZQQXQNW-ADJNRHBOSA-N [(2r,3r,4s,5r,6s)-4,5-diacetyloxy-3-[(2s,3r,4s,5r,6r)-3,4,5-triacetyloxy-6-(acetyloxymethyl)oxan-2-yl]oxy-6-[(2r,3r,4s,5r,6s)-4,5,6-triacetyloxy-2-(acetyloxymethyl)oxan-3-yl]oxyoxan-2-yl]methyl acetate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](OC(C)=O)[C@H]1OC(C)=O)O[C@H]1[C@@H]([C@@H](OC(C)=O)[C@H](OC(C)=O)[C@@H](COC(C)=O)O1)OC(C)=O)COC(=O)C)[C@@H]1[C@@H](COC(C)=O)O[C@@H](OC(C)=O)[C@H](OC(C)=O)[C@H]1OC(C)=O NNLVGZFZQQXQNW-ADJNRHBOSA-N 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 238000007654 immersion Methods 0.000 description 3
- 238000000354 decomposition reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- HRZFUMHJMZEROT-UHFFFAOYSA-L sodium disulfite Chemical compound [Na+].[Na+].[O-]S(=O)S([O-])(=O)=O HRZFUMHJMZEROT-UHFFFAOYSA-L 0.000 description 2
- 229940079827 sodium hydrogen sulfite Drugs 0.000 description 2
- 235000010262 sodium metabisulphite Nutrition 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229920001747 Cellulose diacetate Polymers 0.000 description 1
- 241000588724 Escherichia coli Species 0.000 description 1
- 239000000020 Nitrocellulose Substances 0.000 description 1
- 206010057249 Phagocytosis Diseases 0.000 description 1
- FJWGYAHXMCUOOM-QHOUIDNNSA-N [(2s,3r,4s,5r,6r)-2-[(2r,3r,4s,5r,6s)-4,5-dinitrooxy-2-(nitrooxymethyl)-6-[(2r,3r,4s,5r,6s)-4,5,6-trinitrooxy-2-(nitrooxymethyl)oxan-3-yl]oxyoxan-3-yl]oxy-3,5-dinitrooxy-6-(nitrooxymethyl)oxan-4-yl] nitrate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](O[N+]([O-])=O)[C@H]1O[N+]([O-])=O)O[C@H]1[C@@H]([C@@H](O[N+]([O-])=O)[C@H](O[N+]([O-])=O)[C@@H](CO[N+]([O-])=O)O1)O[N+]([O-])=O)CO[N+](=O)[O-])[C@@H]1[C@@H](CO[N+]([O-])=O)O[C@@H](O[N+]([O-])=O)[C@H](O[N+]([O-])=O)[C@H]1O[N+]([O-])=O FJWGYAHXMCUOOM-QHOUIDNNSA-N 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000012510 hollow fiber Substances 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 230000036512 infertility Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- XONPDZSGENTBNJ-UHFFFAOYSA-N molecular hydrogen;sodium Chemical compound [Na].[H][H] XONPDZSGENTBNJ-UHFFFAOYSA-N 0.000 description 1
- 229920001220 nitrocellulos Polymers 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000008782 phagocytosis Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000000108 ultra-filtration Methods 0.000 description 1
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Description
（産業上の利用分野）
本発明は、セルローズエステルからなる選択透
過性の中空糸膜、スパイラル型膜、チユーブラー
型膜等から構成される流体分離装置の性能を保持
した状態で保存するための保存方法に関するもの
である。
（従来の技術）
従来のセルローズエステルからなる選択性透過
膜で構成された流体分離装置を保存する方法とし
て一般に0.1％以上かつ５％以下の濃度のホルマ
リンを含む水溶液を流体分離装置に充填する方法
がとられている。0.1％以上かつ３％以下のホル
マリンを使つたセルローズエステルからなる選択
性透過膜で構成される流体分離装置の保存方法は
流体分離装置の性能保持という面では非常に良い
方法である。また、ホルマリンによる流体分離装
置内の無菌性の保持という面でも、ホルマリンに
よる殺菌能力が十分に強力であるということから
非常に優れた流体分離装置の保存剤である。しか
しながら、同時に、流体分離装置内に充填されて
いるホルマリンを水洗操作することにより、流体
分離装置内から排除するには、ホルマリン濃度が
低濃度になるまで洗浄しなければならないので、
数時間乃至24時間という長い洗浄時間を必要とす
るという欠点を合わせ持つていた。
（発明が解決しようとする問題点）
本発明者らは、セルローズエステルからなる選
択性透過膜の性能保持性が良く、かつ殺菌性を持
つた保存液で、流体分離装置を水洗により洗浄す
る時に排除効率性が良い流体分離装置の保存液に
ついて鋭意研究した結果、本発明に至つた。
（問題を解決するための手段）
即ち、本発明は、セルローズエステルからなる
選択性透過膜で構成される流体分離装置を保存す
るに際し、流体分離装置内に10mg／以上かつ
14000mg／以下の亜硫酸水素ナトリウムおよび
0.5％以上かつ25％以下の多価アルコール水溶液
を流体分離装置の保存剤として流体分離装置内に
充填する流体分離装置の保存方法である。
また、本発明の好適態様としてアルカリ土類金
属塩を前記の亜硫酸水素ナトリウムおよび多価ア
ルコールを含む保存液に更に添加することによ
り、選択性透過膜の膜性能の保持性を更に高める
ことができる。
セルローズエステルからなる選択性透過膜で構
成される流体分離装置の保存液として、亜硫酸水
素ナトリウムを多価アルコールと混合せず、亜硫
酸水素ナトリウム単独の水溶液を流体分離装置に
充填する場合には、亜硫酸水素ナトリウムが分解
することにより充填した水溶液のPHが低下し、セ
ルローズエステルが加水分解されることにより選
択性透過膜の膜性能が低下する結果になつてしま
う。また、セルローズエステルからなる選択性透
過膜で構成された流体分離装置の保存液として多
価アルコールを亜硫酸水素ナトリウムと混合せ
ず、多価アルコール単独の水溶液を流体分離装置
に充填する場合には多価アルコールによる殺菌効
果が小さいために長期間保存すると流体分離装置
内に細菌が繁殖する結果になる。セルローズエス
テルは特定の細菌の栄養源にもなりうることか
ら、選択性透過膜が特定の細菌に蚕食され、選択
性透過膜の膜性能が低下することもある。
本発明では亜硫酸水素ナトリウムと多価アルコ
ールを混合した水溶液を使用することが必須であ
る。
本発明で用いる亜硫酸水素ナトリウムは重亜硫
酸ナトリウムとも言われる。また、市販の亜硫酸
水素ナトリウムには、一般にピロ亜硫酸ナトリウ
ムが多く含まれており、ピロ亜硫酸ナトリウムも
亜硫酸水素ナトリウムと同じ物質と本発明では考
える。
また、多価アルコールとは、同一分子内に水酸
基を２個以上もつアルコールをいう。二価アルコ
ール、三価アルコール、グリセリン等が挙げられ
る。
また、本発明で言う流体分離装置とは、選択性
透過膜（逆浸透膜、限外濾過膜、精密濾過膜等を
含む）を主構成要素とする一般的に言うエレメン
トを意味すると同時に、エレメントおよび外筒等
を構成要素とする一般に言うモジユールをも意味
する。本発明で言う充填という語句は、浸漬と読
み替えることができる。また流体分離装置内に保
存剤を充填するということは、流体分離装置内の
空間部に１％乃至100％の割合で充填することを
意味する。モジユールを保存する方法として、水
を選択性分離膜により精製する装置等を停台する
場合には、モジユールを装置に取付けた状態のま
ま保存することもある。この場合には、モジユー
ルを含めた装置全体に本発明の保存液を充填させ
る。流体分離装置の性能保持という面では逆浸透
膜の場合に高い塩除去率が要求されるので、本発
明は逆浸透膜の保存に対し特に有効なものであ
る。尚、本発明に係るセルローズエステルとはセ
ルロースジアセテート、セルローストリアセテー
ト、硝酸セルロース等が挙げられる。
（発明の効果）
セルローズエステルからなる選択性透過膜で構
成される流体分離装置の保存液としては、選択性
透過膜の膜性能の保持、殺菌性および保存剤の洗
浄除去性が良いものが望まれる。本発明は前記の
３つの特性を十分に満足したセルローズエステル
からなる選択性透過膜の保存液であり、セルロー
ズエステルからなる選択性透過膜で構成されるエ
レメントおよびモジユール等の流体分離装置の保
管、運搬等の時に利用することができる。また、
セルローズエステルからなる前記のモジユールを
組み込んだ水の精製装置、および海水またはカン
水から飲料水または純水を製造するための装置を
停台するときおよび装置を建設または改造してか
ら運転するまでの間の選択性透過膜の効果的保存
液として有効に使用することができる。
（実施例）
以下本発明の実施例を記載するが、本発明はこ
れら実施例に限定されるものではない。
実施例１及び実施例２
実施例および比較例として、セルローズトリア
セテートからなる選択性透過膜により逆浸透膜を
作製し、以下に記載する成分を含み水溶液を保存
液として使用した場合の膜性能保持率、殺菌能力
を第１表に示す。
膜性能保持率としては逆浸透膜を1500ppm濃
度、25℃、30Kg／cm2Ｇで運転した時の塩除去率
〔％〕および水透過性能〔m3／Hr〕を測定し、評
価開始時の値と保存液に１ケ月間浸漬した後、同
様に測定した値の比率を示す。
Rj保持率＝１ケ月保存液に浸漬後の塩除去率〔％〕／
評価開始時の塩除去率〔％〕×100
FR保持率＝１ケ月保存液に浸漬後の水透過水量〔m2／
Hr〕／評価開始時の水透過水量〔m2／Hr〕×100
殺菌能力は、大腸菌を指標菌として使用し評価
開始時に流体分離装置内に約103個／mlの菌濃度
になる様に充填液中に添加し、更に保存剤を添加
してから24時間後の充填液中の菌濃度を初期の値
との比率で示す。
殺菌能力＝（１−24時間経過後の充填液中の菌濃度／
評価開始時の充填液中の菌濃度）×100
(Industrial Application Field) The present invention is a method for preserving a fluid separation device composed of a permselective hollow fiber membrane, a spiral type membrane, a tubular type membrane, etc. made of cellulose ester while maintaining its performance. It is about the method. (Prior art) A method for preserving a fluid separation device configured with a conventional selectively permeable membrane made of cellulose ester is generally to fill the fluid separation device with an aqueous solution containing formalin at a concentration of 0.1% or more and 5% or less. is taken. The preservation method of a fluid separation device composed of a selectively permeable membrane made of cellulose ester using formalin of 0.1% or more and 3% or less is a very good method in terms of maintaining the performance of the fluid separation device. Furthermore, in terms of maintaining sterility within the fluid separation device using formalin, formalin is an extremely excellent preservative for fluid separation devices because its sterilizing ability is sufficiently strong. However, at the same time, in order to remove the formalin filled in the fluid separation device from the fluid separation device by washing with water, it is necessary to wash the formalin until the concentration of formalin becomes low.
It also has the disadvantage of requiring a long cleaning time of several hours to 24 hours. (Problems to be Solved by the Invention) The present inventors have discovered that a selective permeable membrane made of cellulose ester has good performance retention properties and a storage solution that has bactericidal properties when cleaning a fluid separation device with water. As a result of intensive research into a storage solution for a fluid separation device that has good removal efficiency, the present invention was achieved. (Means for Solving the Problem) That is, the present invention provides that when storing a fluid separation device composed of a selectively permeable membrane made of cellulose ester, 10mg/or more of
14000mg/or less of sodium bisulfite and
This is a method for preserving a fluid separation device in which a polyhydric alcohol aqueous solution of 0.5% or more and 25% or less is filled into the fluid separation device as a preservative for the fluid separation device. In addition, as a preferred embodiment of the present invention, by further adding an alkaline earth metal salt to the storage solution containing sodium bisulfite and polyhydric alcohol, the retention of membrane performance of the selectively permeable membrane can be further enhanced. . When filling the fluid separation device with an aqueous solution of sodium bisulfite alone, without mixing sodium bisulfite with polyhydric alcohol, as a storage solution for a fluid separation device composed of a selectively permeable membrane made of cellulose ester, sulfur dioxide As sodium hydrogen decomposes, the pH of the filled aqueous solution decreases, and cellulose ester is hydrolyzed, resulting in a decrease in membrane performance of the selectively permeable membrane. In addition, when filling an aqueous solution of polyhydric alcohol alone as a storage solution in a fluid separation device configured with a selectively permeable membrane made of cellulose ester without mixing polyhydric alcohol with sodium bisulfite, Since the sterilizing effect of alcohol is low, long-term storage will result in bacterial growth within the fluid separation device. Since cellulose ester can also serve as a nutrient source for certain bacteria, the selectively permeable membrane may be eaten by certain bacteria, resulting in a decrease in the membrane performance of the selectively permeable membrane. In the present invention, it is essential to use an aqueous solution containing a mixture of sodium bisulfite and polyhydric alcohol. Sodium bisulfite used in the present invention is also referred to as sodium bisulfite. Furthermore, commercially available sodium bisulfite generally contains a large amount of sodium pyrosulfite, and the present invention considers that sodium pyrosulfite is the same substance as sodium bisulfite. Moreover, polyhydric alcohol refers to an alcohol having two or more hydroxyl groups in the same molecule. Examples include dihydric alcohol, trihydric alcohol, glycerin, and the like. In addition, the fluid separation device referred to in the present invention refers to an element generally having a selective permeation membrane (including reverse osmosis membrane, ultrafiltration membrane, precision filtration membrane, etc.) as a main component, and an element It also means a generally-called module whose components include an outer cylinder and the like. In the present invention, the term "filling" can be read as "immersion." Furthermore, filling the fluid separation device with a preservative means filling the space within the fluid separation device at a rate of 1% to 100%. When a device for purifying water using a selective separation membrane or the like is stopped, the module may be stored with the module still attached to the device. In this case, the entire device including the module is filled with the preservation solution of the present invention. In order to maintain the performance of a fluid separation device, reverse osmosis membranes require a high salt removal rate, so the present invention is particularly effective for preserving reverse osmosis membranes. Note that the cellulose ester according to the present invention includes cellulose diacetate, cellulose triacetate, cellulose nitrate, and the like. (Effect of the invention) As a storage solution for a fluid separation device composed of a selectively permeable membrane made of cellulose ester, it is desirable to have a solution that maintains the membrane performance of the selectively permeable membrane, has good sterilization properties, and has good washing and removal properties of the preservative. It will be done. The present invention is a storage solution for selectively permeable membranes made of cellulose ester that fully satisfies the above three characteristics, and is a storage solution for fluid separation devices such as elements and modules made of selectively permeable membranes made of cellulose ester. It can be used for transportation, etc. Also,
Water purification equipment incorporating the above-mentioned module made of cellulose ester, and equipment for producing drinking water or pure water from seawater or can water, when shutting down and after construction or modification of the equipment until operation. It can be effectively used as an effective preservation solution for the selectively permeable membrane between the membranes. (Examples) Examples of the present invention will be described below, but the present invention is not limited to these Examples. Example 1 and Example 2 As an example and a comparative example, a reverse osmosis membrane was prepared using a selective permeation membrane made of cellulose triacetate, and the membrane performance retention rate was obtained when an aqueous solution containing the components listed below was used as a storage solution. Table 1 shows the bactericidal ability. The membrane performance retention rate was determined by measuring the salt removal rate [%] and water permeability [m 3 /Hr] when the reverse osmosis membrane was operated at a concentration of 1500 ppm, 25°C, and 30 Kg/cm 2 G. The ratio between the value and the value measured in the same manner after being immersed in the storage solution for one month is shown. Rj retention rate = Salt removal rate after immersion in storage solution for 1 month [%] /
Salt removal rate at the start of evaluation [%] x 100 FR retention rate = Water permeation rate after immersion in preservation solution for 1 month [m 2 /
Hr]/Amount of water permeated at the start of evaluation [ m2 /Hr] x 100 The sterilizing ability is determined by using Escherichia coli as an indicator bacteria, and adjusting the bacteria concentration in the fluid separation device to approximately 103 cells/ml at the start of evaluation. The concentration of bacteria in the filling liquid 24 hours after adding the preservative to the filling liquid is shown as a ratio to the initial value. Sterilization ability = (bacteria concentration in the filling liquid after 1-24 hours /
Bacteria concentration in the filling liquid at the start of evaluation) x 100
【表】
第１表の結果から実施例（No.１）は膜性能の保
持率が良く、殺菌能力も高いことを示している
が、No.１の比較例に示したように亜硫酸水素ナト
リウム単独の場合には、十分な殺菌能力が得られ
ず膜性能の保持率も低下している。
No.２の比較例の場合には、グリセリンのみでは
殺菌能力が全く無いばかりか、細菌によるセルロ
ーズエステル膜の蚕食が原因でFR保持率が100％
以上になつてしまつた。この現像は、大巾なRj
保持率の低下を伴なうので膜性能は悪くなつてし
まう。
実施例のNo.２で示すようにアルカリ土類金属塩
であるMgCl2を、実施例のNo.１の液に添加すると
膜性能の保持率が実施例のNo.１の場合よりも更に
良くなることがわかる。
実施例 ３
保存剤としてのグリセリンの添加は、セルロー
ズエステルの選択透過性膜に対して使用される場
合には、グリセリン自身の影響による膜性能の保
持と亜硫酸水素ナトリウムが分解するのを防ぐこ
とにより亜硫酸水素ナトリウムの分解により保存
剤のPHが下がり、これが原因でセルローズエステ
ルが分解するという反応を防ぐという効果も合わ
せ持つている。そこで、第２表にセルローズエス
テルに対するグリセリン濃度と亜硫酸水素ナトリ
ウム濃度の保持率との関係を示す。
（亜硫酸水素ナトリウム濃度の保持率）＝（１ケ月
保存後の亜硫酸水素ナトリウム濃度）／（初期の亜硫酸
水素ナトリウム濃度）×100[Table] The results in Table 1 show that Example (No. 1) has a good membrane performance retention rate and high sterilization ability, but as shown in the comparative example of No. 1, sodium hydrogen sulfite When used alone, sufficient sterilization ability is not obtained and the retention rate of membrane performance is also reduced. In the case of Comparative Example No. 2, not only did glycerin alone have no bactericidal ability, but the FR retention rate was 100% due to the phagocytosis of the cellulose ester film by bacteria.
It has become more than that. This development is a wide Rj
Since this is accompanied by a decrease in retention rate, the membrane performance deteriorates. As shown in Example No. 2, when MgCl 2 , which is an alkaline earth metal salt, was added to the solution in Example No. 1, the membrane performance retention rate was even better than in Example No. 1. I know what will happen. Example 3 Addition of glycerin as a preservative, when used for a cellulose ester permselective membrane, maintains membrane performance due to the influence of glycerin itself and prevents sodium bisulfite from decomposing. The decomposition of sodium bisulfite lowers the pH of the preservative, which also has the effect of preventing the cellulose ester from decomposing. Therefore, Table 2 shows the relationship between the retention rate of glycerin concentration and sodium bisulfite concentration for cellulose ester. (Retention rate of sodium bisulfite concentration) = (Sodium bisulfite concentration after 1 month storage) / (Initial sodium bisulfite concentration) x 100
【表】
第２表からわかるように亜硫酸水素ナトリウム
とグリセリンとの混合液等では、グリセリン濃度
が0.5％未満では亜硫酸水素ナトリウムの保持率
が悪く、またこの時のPHが３以下になるのでセル
ローズエステルからなる選択性分離膜の保存剤と
しては適さない。また、グリセリンの濃度が25％
を越えるとグリセリンの保存剤中での分散が悪い
ので適さない。
実施例 ４
第３表にセルローズエステルに対する亜硫酸水
素ナトリウム濃度と殺菌能力との関係を示す。第
３表の比較テストでは保存液中に10％のグリセリ
ンを添加した状態で行なつた。ここで言う殺菌能
力の意味およびテスト法は第１表の場合と同じで
ある。[Table] As can be seen from Table 2, in a mixture of sodium bisulfite and glycerin, the retention rate of sodium bisulfite is poor when the glycerin concentration is less than 0.5%, and the pH at this time is 3 or less, so cellulose It is not suitable as a preservative for selective separation membranes made of esters. In addition, the concentration of glycerin is 25%
Exceeding this is not suitable because the glycerin will not disperse well in the preservative. Example 4 Table 3 shows the relationship between sodium bisulfite concentration and bactericidal ability for cellulose ester. The comparative tests shown in Table 3 were carried out with 10% glycerin added to the storage solution. The meaning and test method of sterilizing ability here are the same as in Table 1.
【表】
第３表の結果から、保存液中の亜硫酸水素ナト
リウム濃度が５mg／以下の場合には保存液によ
る殺菌能力が著しく低下することがわかる。ま
た、保存液中の亜硫酸水素ナトリウム濃度が
14000mg／を越えると亜硫酸水素ナトリウムが
分解して発生する亜硫酸ガスの臭いが強くなり取
り扱いが難しくなる。
実施例 ５
第４表に本発明による保存液の水洗による洗浄
除去性を１％ホルマリンを使用した場合と比較し
て示す。
この洗浄テストは、セルローズトリアセテート
からなる選択性透過膜により逆浸透膜を作成し、
流体分離装置に組み込み、この流体分離装置に保
存液を前もつて充填した後、流体分離装置を水洗
洗浄した時に流体分離装置の排出口から出てくる
液をサンプリングして、亜硫酸水素ナトリウムの
濃度またはホルマリンの濃度を測定した。そして
各々の濃度が一定値以下になるまでの所要時間を
測定した。[Table] From the results in Table 3, it can be seen that when the concentration of sodium bisulfite in the storage solution is 5 mg/or less, the bactericidal ability of the storage solution is significantly reduced. In addition, the concentration of sodium bisulfite in the storage solution
If the amount exceeds 14,000 mg, the odor of sulfur dioxide gas generated by decomposition of sodium bisulfite becomes strong and difficult to handle. Example 5 Table 4 shows the washing removability of the preservation solution according to the present invention by washing with water in comparison with that when 1% formalin was used. In this cleaning test, a reverse osmosis membrane was created using a selective permeation membrane made of cellulose triacetate.
It is installed in a fluid separation device, and after pre-filling the fluid separation device with a storage solution, when the fluid separation device is washed with water, the liquid coming out from the outlet of the fluid separation device is sampled and the concentration of sodium hydrogen sulfite is determined. Or the concentration of formalin was measured. Then, the time required for each concentration to fall below a certain value was measured.
【表】
実施例５は亜硫酸水素ナトリウムを2000mg／
およびグリセリンを20％含む水溶液を保存液とし
て使用した。
また、比較例３は１mg／のホルマリン水溶液
を保存液として使用した。
第４表から、実施例５の方が比較例３よりも水
洗洗浄による保存剤の排除性がはるかに優れてい
ることがわかる。[Table] In Example 5, sodium bisulfite was added at 2000 mg/
and an aqueous solution containing 20% glycerin was used as a storage solution. Furthermore, in Comparative Example 3, a 1 mg/aqueous formalin solution was used as the storage solution. From Table 4, it can be seen that Example 5 is far superior to Comparative Example 3 in removing the preservative by washing with water.
Claims (1)
構成される流体分離装置を保存するに際し、流体
分離装置内に10mg／以上かつ14000mg／以下
の亜硫酸水素ナトリウムおよび0.5％以上かつ25
％以下の多価アルコールを含む水溶液を流体分離
装置の保存液として充填することを特徴とする流
体分離装置の保存方法。 ２ アルカリ土類金属塩を更に添加した水溶液を
用いる特許請求の範囲第１項記載の流体分離装置
の保存方法。[Claims] 1. When storing a fluid separation device composed of a selectively permeable membrane made of cellulose ester, the fluid separation device contains at least 10 mg and 14,000 mg of sodium bisulfite and at least 0.5% and 25% sodium bisulfite.
1. A method for preserving a fluid separation device, comprising filling the fluid separation device with an aqueous solution containing % or less of polyhydric alcohol as a storage solution of the fluid separation device. 2. A method for preserving a fluid separation device according to claim 1, which uses an aqueous solution to which an alkaline earth metal salt is further added.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9210485A JPS61249505A (en) | 1985-04-27 | 1985-04-27 | Method for preserving fluid separator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9210485A JPS61249505A (en) | 1985-04-27 | 1985-04-27 | Method for preserving fluid separator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61249505A JPS61249505A (en) | 1986-11-06 |
| JPH0472569B2 true JPH0472569B2 (en) | 1992-11-18 |
Family
ID=14045131
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9210485A Granted JPS61249505A (en) | 1985-04-27 | 1985-04-27 | Method for preserving fluid separator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61249505A (en) |
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|---|---|---|---|---|
| DE60213184T2 (en) * | 2001-11-16 | 2007-06-28 | U.S. Filter Wastewater Group, Inc. | Method for cleaning membranes |
| JP4611982B2 (en) | 2003-08-29 | 2011-01-12 | シーメンス・ウォーター・テクノロジーズ・コーポレーション | Backwash method |
| JP4961683B2 (en) * | 2004-06-22 | 2012-06-27 | 東洋紡績株式会社 | Fluid separation device and / or membrane element storage solution, fluid separation device and membrane element and storage method thereof |
| WO2006029465A1 (en) | 2004-09-15 | 2006-03-23 | Siemens Water Technologies Corp. | Continuously variable aeration |
| CA2605757A1 (en) | 2005-04-29 | 2006-11-09 | Siemens Water Technologies Corp. | Chemical clean for membrane filter |
| CA2618107A1 (en) | 2005-08-22 | 2007-03-01 | Siemens Water Technologies Corp. | An assembly for water filtration using a tube manifold to minimise backwash |
| JP4863442B2 (en) * | 2005-09-01 | 2012-01-25 | 三菱レイヨン株式会社 | Separation membrane preservation solution, separation membrane module, and separation membrane preservation method |
| US8293098B2 (en) | 2006-10-24 | 2012-10-23 | Siemens Industry, Inc. | Infiltration/inflow control for membrane bioreactor |
| EP2129629A1 (en) | 2007-04-02 | 2009-12-09 | Siemens Water Technologies Corp. | Improved infiltration/inflow control for membrane bioreactor |
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| KR20170092708A (en) | 2007-05-29 | 2017-08-11 | 에보쿠아 워터 테크놀로지스 엘엘씨 | Water treatment system |
| CA2731774A1 (en) | 2008-07-24 | 2010-01-28 | Siemens Water Technologies Corp. | Frame system for membrane filtration modules |
| WO2010142673A1 (en) | 2009-06-11 | 2010-12-16 | Siemens Water Technologies Corp. | Methods for cleaning a porous polymeric membrane and a kit for cleaning a porous polymeric membrane |
| JP2011131173A (en) * | 2009-12-25 | 2011-07-07 | Sepa Sigma Inc | Flat membrane set for filtration separation, module, and method for preserving the same |
| HUE045642T2 (en) | 2010-04-30 | 2020-01-28 | Evoqua Water Tech Llc | Fluid flow distribution device |
| EP2618916A4 (en) | 2010-09-24 | 2016-08-17 | Evoqua Water Technologies Llc | Fluid control manifold for membrane filtration system |
| WO2013049109A1 (en) | 2011-09-30 | 2013-04-04 | Siemens Industry, Inc. | Isolation valve |
| JP2014528352A (en) | 2011-09-30 | 2014-10-27 | エヴォクア ウォーター テクノロジーズ エルエルシーＥｖｏｑｕａ Ｗａｔｅｒ Ｔｅｃｈｎｏｌｏｇｉｅｓｌｌｃ | Improved manifold structure |
| KR102108593B1 (en) | 2012-06-28 | 2020-05-29 | 에보쿠아 워터 테크놀로지스 엘엘씨 | A potting method |
| AU2013231145B2 (en) | 2012-09-26 | 2017-08-17 | Evoqua Water Technologies Llc | Membrane potting methods |
| US9764289B2 (en) | 2012-09-26 | 2017-09-19 | Evoqua Water Technologies Llc | Membrane securement device |
| WO2014052139A1 (en) | 2012-09-27 | 2014-04-03 | Evoqua Water Technologies Llc | Gas scouring apparatus for immersed membranes |
| EP3052221B1 (en) | 2013-10-02 | 2022-12-14 | Rohm & Haas Electronic Materials Singapore Pte. Ltd | Device for repairing a membrane filtration module |
| AU2016294153B2 (en) | 2015-07-14 | 2022-01-20 | Evoqua Water Technologies Llc | Aeration device for filtration system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS497417A (en) * | 1972-05-10 | 1974-01-23 | ||
| JPS5621604A (en) * | 1979-07-27 | 1981-02-28 | Toray Ind Inc | Separation of liquid by semipermeable composite membrane |
| JPS59213495A (en) * | 1983-05-20 | 1984-12-03 | Kurita Water Ind Ltd | Treatment of water |
-
1985
- 1985-04-27 JP JP9210485A patent/JPS61249505A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS497417A (en) * | 1972-05-10 | 1974-01-23 | ||
| JPS5621604A (en) * | 1979-07-27 | 1981-02-28 | Toray Ind Inc | Separation of liquid by semipermeable composite membrane |
| JPS59213495A (en) * | 1983-05-20 | 1984-12-03 | Kurita Water Ind Ltd | Treatment of water |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61249505A (en) | 1986-11-06 |
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