JP2663141B2 - Detergent for ion exchange membrane - Google Patents
Detergent for ion exchange membraneInfo
- Publication number
- JP2663141B2 JP2663141B2 JP63133821A JP13382188A JP2663141B2 JP 2663141 B2 JP2663141 B2 JP 2663141B2 JP 63133821 A JP63133821 A JP 63133821A JP 13382188 A JP13382188 A JP 13382188A JP 2663141 B2 JP2663141 B2 JP 2663141B2
- Authority
- JP
- Japan
- Prior art keywords
- exchange membrane
- ion exchange
- membrane
- cleaning
- detergent
- 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
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
- Detergent Compositions (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明はイオン交換膜用洗浄剤に関し、更に詳しくは
汚染されたイオン交換膜を、該膜を劣化することなく洗
浄できる洗浄剤に関する。Description: TECHNICAL FIELD The present invention relates to a cleaning agent for an ion exchange membrane, and more particularly to a cleaning agent capable of cleaning a contaminated ion exchange membrane without deteriorating the membrane.
イオン交換膜を使用する電気透析装置を用いて、例え
ば海水の脱塩若しくは濃縮を長期間行うと、海水中の溶
解物質、浮遊懸濁物質、微生物等が膜表面あるいは膜表
層部に付着する。そのために膜が目詰まりしたり、電気
抵抗が著しく上昇して、透析性能が低下する。そこで、
イオン交換膜は定期的に洗浄し膜への付着物を除去しな
ければならない。その洗浄方法としては、物理的洗浄方
法と化学的洗浄方法とが知られている。When, for example, desalination or concentration of seawater is performed for a long period of time using an electrodialysis device using an ion exchange membrane, dissolved substances, suspended suspended substances, microorganisms, and the like in the seawater adhere to the membrane surface or the membrane surface layer. As a result, the membrane is clogged, the electric resistance is significantly increased, and the dialysis performance is reduced. Therefore,
Ion exchange membranes must be periodically cleaned to remove deposits on the membrane. As the cleaning method, a physical cleaning method and a chemical cleaning method are known.
物理的洗浄方法としては、電気透析装置を分解してイ
オン交換膜を取り出し、１枚づつスポンジ等でこすり膜
面の付着物を洗浄する方法である。この方法は装置の分
解、洗浄、組み立てに時間を要し擦り方が悪いとイオン
交換膜の損傷を生じ、洗浄効果も十分でない。The physical cleaning method is a method in which the electrodialysis device is disassembled, the ion exchange membrane is taken out, and one by one is rubbed with a sponge or the like, and the adhered substance on the membrane surface is washed. This method requires time for disassembling, cleaning and assembling the apparatus. If the method is poorly rubbed, the ion exchange membrane is damaged, and the cleaning effect is not sufficient.
化学的洗浄方法は適当な洗浄液中に膜を浸漬するか、
あるいは装置内に洗浄液を循環させることにより膜の洗
浄を簡便に行える利点がある。例えば、酸、アルカリ、
含ハロゲン酸化物、過酸化水素の洗浄液を使用する場合
があるが、長期間使用中に膜を構成する高分子物質の劣
化を生じ易い欠点がある。また、イオン性を持った界面
活性剤例えば、陽イオン界面活性剤、陰イオン界面活性
剤、両性界面活性剤は、水中で解離してそれぞれイオン
性を持ち、膜に吸着して電気抵抗を上昇させるので使用
できない〔特開昭56−118702号、同56−118703号〕。Chemical cleaning methods include immersing the membrane in an appropriate cleaning solution,
Alternatively, there is an advantage that the membrane can be easily washed by circulating the washing liquid in the apparatus. For example, acids, alkalis,
Although a cleaning solution containing halogen-containing oxides and hydrogen peroxide may be used, there is a disadvantage that the polymer constituting the film is liable to be deteriorated during long-term use. In addition, ionic surfactants such as cationic surfactants, anionic surfactants, and amphoteric surfactants dissociate in water and become ionic, respectively, and adsorb to the membrane to increase electrical resistance. And cannot be used (JP-A-56-118702 and JP-A-56-118703).
〔発明が解決しようとする課題） そこで、本発明の目的は、イオン交換膜を劣化させる
ことなく洗浄できる洗浄剤を提供することにある。[Problems to be Solved by the Invention] Accordingly, an object of the present invention is to provide a cleaning agent that can be cleaned without deteriorating an ion exchange membrane.
イオン交換膜を交互に多数組み込んだ電気透析槽（海
水の脱塩若しくは濃縮用）を長期に渡り運転すると、イ
オン交換膜の希釈室側及び濃縮室側に海水中の微生物が
発生・付着し、海水の流量の低下を生じ入口圧が増大し
て透析性能が低下する。イオン交換膜に付着物したこれ
らの微生物は、好気性の細菌集団（Zooglea）や糸状菌
が主である。菌体の構造により海水中のSiO2、Fe2O3、C
a、Mg、Fe（OH）３などの汚れが付着し細菌集団（Zoogl
ea）や糸状菌がこれを取り込んで成長し大きな汚れの固
まりとなりイオン交換膜上に形成していき入口圧の上
昇、電気抵抗値の上昇などを起こす。本発明者は鋭意研
究の結果、この際菌集団（Zooglea）や糸状菌を分解す
ることにより他の汚れも容易に除去できることを見い出
して発明を完成した。If an electrodialysis tank (for desalination or concentration of seawater) incorporating a large number of ion-exchange membranes is operated for a long time, microorganisms in seawater will be generated and adhere to the dilution chamber and the concentration chamber of the ion-exchange membrane. The flow rate of seawater decreases, the inlet pressure increases, and the dialysis performance decreases. These microorganisms attached to the ion exchange membrane are mainly aerobic bacterial communities (Zooglea) and filamentous fungi. SiO 2 , Fe 2 O 3 , C
a, Mg, Fe (OH) 3 and other stains adhere to the bacterial population (Zoogl
ea) and filamentous fungi take this in and grow to form large clumps of dirt and form on the ion exchange membrane, causing an increase in inlet pressure, an increase in electric resistance, and the like. As a result of intensive studies, the inventor of the present invention has found that other stains can be easily removed by decomposing the fungal population (Zooglea) and the filamentous fungi, and completed the invention.
本発明は、キチナーゼを含有するイオン交換膜用洗浄
剤に関する。The present invention relates to a detergent for ion exchange membranes containing chitinase.
以下本発明について説明する。 Hereinafter, the present invention will be described.
本発明に用いるキチナーゼは微生物の細胞膜のキチン
に作用してこれらを加水分解し、かつ、細胞自体も分解
する酵素である。The chitinase used in the present invention is an enzyme that acts on chitin on the cell membrane of a microorganism to hydrolyze them and also decompose the cells themselves.
本発明の洗浄剤は、上記多糖類分解酵素に加えてpH緩
衝剤としてクエン酸、グルコン酸、リンゴ酸、酢酸、酒
石酸、シュウ酸、リン酸、乳酸、コハク酸、フマル酸、
マロン酸、グルタル酸、マレイン酸、シトラコン酸など
のソーダ、アンモニウム、カリウム、アミン塩を含有す
ることができる。The cleaning agent of the present invention, in addition to the polysaccharide-degrading enzyme, as a pH buffer, citric acid, gluconic acid, malic acid, acetic acid, tartaric acid, oxalic acid, phosphoric acid, lactic acid, succinic acid, fumaric acid
It may contain sodas such as malonic acid, glutaric acid, maleic acid, citraconic acid, ammonium, potassium and amine salts.
本発明の洗浄剤は、更に、必要により洗浄力を増強す
るために非イオン界面活性剤、分散剤、キレート剤、ビ
ルダー等を含有することができる。The detergent of the present invention may further contain a nonionic surfactant, a dispersant, a chelating agent, a builder, and the like, if necessary, to enhance the detergency.
本発明の洗浄剤は、粉末状であっても、水あるいはそ
の他の溶剤（例えばメタノール、エタノール、プロパノ
ール、ブタノール等の低級アルコール類、エチレングリ
コール、プロピレングリコール等のグリコール類、アセ
トン、メチルエチルケトン等の低級ケトン等）に溶解又
は分散した液状であってもよい。The cleaning agent of the present invention may be in the form of powder or water or another solvent (for example, lower alcohols such as methanol, ethanol, propanol and butanol, glycols such as ethylene glycol and propylene glycol, and lower solvents such as acetone and methyl ethyl ketone). (Ketone, etc.).
本発明の洗浄剤は、キチナーゼを0.001〜30％、好ま
しくは0.01〜10％、より好ましくは0.1〜５％を含有す
る液として用いることが適当である。そのため本発明の
洗浄剤は、これらの濃度の液体であっても、希釈により
上記範囲として用いることもでき、特に、洗浄液中のキ
チナーゼの濃度が0.1〜２％であることが望ましい。こ
れ以下の濃度では細胞壁の分解能が劣り反応時間が長期
化する傾向がある。The detergent of the present invention is suitably used as a liquid containing 0.001 to 30%, preferably 0.01 to 10%, more preferably 0.1 to 5% of chitinase. Therefore, the cleaning agent of the present invention can be used in the above-mentioned range by dilution even if it is a liquid having these concentrations, and it is particularly desirable that the concentration of chitinase in the cleaning solution is 0.1 to 2%. At a concentration lower than this, the resolution of the cell wall is poor and the reaction time tends to be prolonged.
本発明の洗浄剤を用いる洗浄の際に、洗浄液のpH及び
温度は、例えば第１表に示すように使用する酵素の到適
pH近傍とすることが好ましい。At the time of washing using the detergent of the present invention, the pH and temperature of the washing solution are determined, for example, as shown in Table 1 by the optimal enzyme used.
It is preferable that the pH be around pH.
洗浄は、酵素等を含有する洗浄液をイオン交換膜を組
んだ状態で装置内に循環してもよく、洗浄液にイオン交
換膜を浸漬してもよい。 In the cleaning, a cleaning solution containing an enzyme or the like may be circulated in the apparatus with the ion exchange membrane assembled, or the ion exchange membrane may be immersed in the cleaning solution.
本発明の洗浄剤が対象とするイオン交換膜には特に限
定はなく、本発明の洗浄剤はあらゆるイオン交換膜に対
して使用できる。The ion exchange membrane targeted by the cleaning agent of the present invention is not particularly limited, and the cleaning agent of the present invention can be used for any ion exchange membrane.
以下本発明によりさらに詳細に説明する。 Hereinafter, the present invention will be described in more detail.
実施例１ 海水の脱塩及び濃縮に使用され付着物が付着したイオ
ン交換膜（約20×10cmの長方形）を用意しこれを第２表
に示す各酵素の水溶液１に35℃において一定時間浸漬
した。その後、イオン交換膜を取り出した。Example 1 An ion-exchange membrane (a rectangle of about 20 × 10 cm) used for desalination and concentration of seawater and having attached substances was prepared, and immersed in an aqueous solution 1 of each enzyme shown in Table 2 at 35 ° C. for a certain time. did. Then, the ion exchange membrane was taken out.
洗浄効果は、 使用前にイオン交換膜の重量、付着物が付着したイオ
ン交換膜の重量、洗浄後のイオン交換膜の重量を測定し
上記の洗浄率（％）の式により算出し、これを用いて表
した。結果は、第２表に示す。The cleaning effect is Before use, the weight of the ion-exchange membrane, the weight of the ion-exchange membrane to which the deposits were adhered, and the weight of the ion-exchange membrane after washing were measured and calculated by the above-described equation of the washing rate (%), and expressed using this. . The results are shown in Table 2.
実施例２ 海水の濃縮を電気透析装置を使い行っていたところ、
入口圧の上昇がみられ透析を中止し、水道水を通水して
透析装置内の海水を洗いpHを中性にしてから、キチナー
ゼ0.3％（W/V）、クエン酸二アンモニウム0.3％（W/V）
（pH5.2）で35℃に加温された酵素溶液500を５時間循
環させた。入口圧は減少した。 Example 2 When seawater was concentrated using an electrodialysis device,
The dialysis was stopped due to an increase in the inlet pressure, the tap water was passed through, the seawater in the dialysis machine was washed to neutralize the pH, and then chitinase 0.3% (W / V) and diammonium citrate 0.3% ( W / V)
The enzyme solution 500 heated to 35 ° C. (pH 5.2) was circulated for 5 hours. Inlet pressure decreased.
そこで、電気透析装置を分解して膜の交流抵抗値を測
定した。結果を第３表、第４表に示す。Then, the electrodialysis device was disassembled and the AC resistance value of the membrane was measured. The results are shown in Tables 3 and 4.
比較例１ 実施例２の洗浄液に代わって、水酸化ナトリウム１％
の水溶液に電気透析装置を分解し抜き出したイオン交換
膜を５時間浸漬した。Comparative Example 1 Instead of the washing solution of Example 2, sodium hydroxide 1%
The electrodialysis apparatus was disassembled in the aqueous solution of the above, and the extracted ion exchange membrane was immersed for 5 hours.
比較例２ 実施例２の洗浄液に代わって、水酸化カリウム１％の
水溶液に電気透析装置を分解し抜き出したイオン交換膜
を５時間浸漬した。Comparative Example 2 Instead of the washing solution of Example 2, the ion exchange membrane extracted and disassembled from the electrodialyzer in an aqueous solution of 1% potassium hydroxide was immersed for 5 hours.
結果を第３表、第４表に示す。 The results are shown in Tables 3 and 4.
〔発明の効果〕 本発明の洗浄剤は、従来の物理的、化学的方法に比較
して極めて容易にかつ完全にイオン交換膜を洗浄するこ
とができ、かつイオン交換膜の劣化も生じることがな
い。 [Effects of the Invention] The cleaning agent of the present invention can extremely easily and completely clean an ion exchange membrane as compared with conventional physical and chemical methods, and can cause deterioration of the ion exchange membrane. Absent.
Claims (1)
剤。1. A cleaning agent for an ion exchange membrane containing chitinase.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63133821A JP2663141B2 (en) | 1988-05-31 | 1988-05-31 | Detergent for ion exchange membrane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63133821A JP2663141B2 (en) | 1988-05-31 | 1988-05-31 | Detergent for ion exchange membrane |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01304007A JPH01304007A (en) | 1989-12-07 |
| JP2663141B2 true JP2663141B2 (en) | 1997-10-15 |
Family
ID=15113827
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63133821A Expired - Lifetime JP2663141B2 (en) | 1988-05-31 | 1988-05-31 | Detergent for ion exchange membrane |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2663141B2 (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2287713A (en) * | 1994-03-19 | 1995-09-27 | Procter & Gamble | Detergent composition containing pectic enzyme |
| DE19503060A1 (en) * | 1995-02-01 | 1996-08-08 | Henkel Ecolab Gmbh & Co Ohg | Cleaning procedure for membrane filters |
| US5629278A (en) * | 1995-09-18 | 1997-05-13 | The Proctor & Gamble Company | Detergent compositions |
| WO1998045029A1 (en) * | 1997-04-08 | 1998-10-15 | Pall Corporation | Method for producing beer |
| US7132119B1 (en) | 1997-04-08 | 2006-11-07 | Pall Corporation | Method for producing beer |
| JP2007160242A (en) * | 2005-12-15 | 2007-06-28 | Japan Organo Co Ltd | Ballast water preparation apparatus, ship equipped with it, and ballast water preparation method |
| JP5245596B2 (en) * | 2008-07-15 | 2013-07-24 | 栗田工業株式会社 | Reverse osmosis membrane performance recovery method and membrane separation treatment method |
| CN103816809A (en) * | 2014-03-13 | 2014-05-28 | 孟州市华兴生物化工有限责任公司 | Cleaning method for semipermeable membrane used for extracting amino acid from fermentation liquor |
| CN106731860B (en) * | 2017-01-09 | 2020-06-05 | 唐山钢铁集团有限责任公司 | Cleaning agent combining reverse osmosis membrane with multi-element organic solvent and biological agent and using method |
| CN109603562A (en) * | 2018-12-20 | 2019-04-12 | 武汉新华扬生物股份有限公司 | A kind of enzyme preparation and its application method for beer filtration Membrane cleaning |
| US10988715B2 (en) * | 2019-03-14 | 2021-04-27 | The Procter & Gamble Company | Method for treating cotton |
| US20200291332A1 (en) * | 2019-03-14 | 2020-09-17 | The Procter & Gamble Company | Cleaning compositions comprising enzymes |
| US11248194B2 (en) * | 2019-03-14 | 2022-02-15 | The Procter & Gamble Company | Cleaning compositions comprising enzymes |
| EP4291324A4 (en) * | 2021-02-10 | 2024-12-18 | BL TECHNOLOGIES, Inc. | Enhanced enzymatic cleaner for membranes and method of cleaning thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51131477A (en) * | 1975-05-12 | 1976-11-15 | Tokuyama Soda Co Ltd | A process of removing contaminations in electro-dialysis cells |
-
1988
- 1988-05-31 JP JP63133821A patent/JP2663141B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01304007A (en) | 1989-12-07 |
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