JPH04330923A - Method for cleaning porous flat membrane for filtering heated soy sauce - Google Patents
Method for cleaning porous flat membrane for filtering heated soy sauceInfo
- Publication number
- JPH04330923A JPH04330923A JP3005121A JP512191A JPH04330923A JP H04330923 A JPH04330923 A JP H04330923A JP 3005121 A JP3005121 A JP 3005121A JP 512191 A JP512191 A JP 512191A JP H04330923 A JPH04330923 A JP H04330923A
- Authority
- JP
- Japan
- Prior art keywords
- membrane
- soy sauce
- cleaning
- flat membrane
- porous flat
- 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.)
- Granted
Links
- 239000012528 membrane Substances 0.000 title claims abstract description 42
- 238000004140 cleaning Methods 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 title claims description 22
- 238000001914 filtration Methods 0.000 title claims description 17
- 235000013555 soy sauce Nutrition 0.000 title claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 34
- 230000004907 flux Effects 0.000 claims abstract description 21
- 238000009295 crossflow filtration Methods 0.000 claims abstract description 9
- 230000003247 decreasing effect Effects 0.000 claims abstract description 6
- 239000000126 substance Substances 0.000 claims description 11
- 239000007864 aqueous solution Substances 0.000 claims description 9
- 238000009825 accumulation Methods 0.000 claims description 2
- 239000003513 alkali Substances 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 3
- 230000008021 deposition Effects 0.000 abstract description 2
- 238000000926 separation method Methods 0.000 description 9
- 102000004169 proteins and genes Human genes 0.000 description 3
- 108090000623 proteins and genes Proteins 0.000 description 3
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 238000009928 pasteurization Methods 0.000 description 2
- -1 polytetrafluoroethylene Polymers 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 239000005909 Kieselgur Substances 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 235000021317 phosphate Nutrition 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 229920002492 poly(sulfone) Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 239000011550 stock solution Substances 0.000 description 1
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
- Soy Sauces And Products Related Thereto (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、火入れ醤油の濾過時、
フアウリング物質が膜表面に堆積して、水透過流束の低
下した多孔質平板状膜を洗浄して、水透過流束を回復さ
せる洗浄方法に関する。[Industrial Application Field] The present invention is applicable to the filtration of pasteurized soy sauce.
The present invention relates to a cleaning method for cleaning a porous flat membrane whose water permeation flux has decreased due to deposition of fouling substances on the membrane surface to restore the water permeation flux.
【０００２】0002
【従来の技術】多孔質膜を分離手段として備えた膜分離
装置は、熱エネルギーを必要とせず、且つ、連続的に分
離操作を行なうことができるので、醸造ほか、種々の産
業分野で、液体分離のために広く実用化されている。し
かし、このような膜分離処理においては、処理を長期間
にわたつて行なつた場合や、処理原液の液質が低劣なと
きは、原液供給側の膜面にタンパク質、リン酸塩類、更
には微生物等の所謂フアウリング物質が沈着堆積し、膜
分離装置の水透過流束と分離効率の低下を招くのみなら
ず、膜分離装置を損傷させることもある。[Prior Art] Membrane separation devices equipped with porous membranes as separation means do not require thermal energy and can perform continuous separation operations, so they are used in various industrial fields such as brewing. Widely used for separation. However, in such membrane separation processing, when the treatment is carried out for a long period of time or when the quality of the processing stock solution is poor, proteins, phosphates, and even So-called fouling substances such as microorganisms are deposited and accumulated, which not only causes a decrease in the water permeation flux and separation efficiency of the membrane separation device, but also may damage the membrane separation device.
【０００３】一般に醤油の製造においては、生揚醤油を
殺菌、品質向上、沈澱物除去等の目的のために、従来、
８０〜８５℃の温度に加熱する火入れが行なわれる。こ
のように処理された醤油は火入れ醤油と呼ばれており、
この火入れ後、濾過して製品醤油として出荷される。従
来、この火入れの後の濾過にはケイソウ土が濾材として
用いられているが、近年、多孔質膜で濾過する膜処理法
も採用されている。Generally, in the production of soy sauce, freshly fried soy sauce is conventionally processed for purposes such as sterilization, quality improvement, and removal of sediment.
Pasteurization is carried out by heating to a temperature of 80-85°C. Soy sauce processed in this way is called pasteurized soy sauce.
After this pasteurization, the soy sauce is filtered and shipped as finished soy sauce. Conventionally, diatomaceous earth has been used as a filter medium for filtration after burning, but in recent years, a membrane treatment method in which filtration is performed using a porous membrane has also been adopted.
【０００４】しかし、この火入れ醤油の濾過に際しては
、凝固したタンパク質が膜面に沈着堆積して、経時的に
膜分離装置の水透過流束と分離効率を著しく低下させる
。従来、このように、フアウリング物質による汚染によ
つて水透過流束の低下した多孔質膜を洗浄し、水透過流
束を回復させる方法として、過酸化水素や塩素のような
酸化剤、アルカリ水溶液等を用いて洗浄する方法が提案
されている。しかし、かかる方法を火入れ醤油の濾過時
、フアウリング物質が膜表面に堆積して、水透過流束の
低下した多孔質平板状膜に適用しても、その水透過流束
は有効に回復されず、かくして、かかる火入れ醤油の濾
過に用いる膜分離装置の性能を簡単な方法にて速やかに
回復させる有効な方法が要望されている。[0004] However, during the filtration of pasteurized soy sauce, coagulated proteins accumulate on the membrane surface, significantly reducing the water permeation flux and separation efficiency of the membrane separator over time. Conventionally, as a method for cleaning porous membranes whose water permeation flux has decreased due to contamination with fouling substances and restoring the water permeation flux, oxidizing agents such as hydrogen peroxide and chlorine, and alkaline aqueous solutions have been used. A cleaning method using, for example, has been proposed. However, even if such a method is applied to a porous flat membrane whose water permeation flux has decreased due to the accumulation of fouling substances on the membrane surface during filtration of pasteurized soy sauce, the water permeation flux cannot be effectively restored. Therefore, there is a need for an effective method for quickly restoring the performance of the membrane separator used for filtering pasteurized soy sauce in a simple manner.
【０００５】[0005]
【発明が解決しようとする課題】本発明は、上記した要
望に応えるためになされたものであつて、火入れ醤油の
濾過時、多孔質平板状膜の性能を簡単な方法にて速やか
に回復させる洗浄方法を提供することを目的とする。[Problems to be Solved by the Invention] The present invention has been made in response to the above-mentioned needs, and is intended to quickly restore the performance of a porous flat membrane in a simple manner when filtering pasteurized soy sauce. The purpose is to provide a cleaning method.
【０００６】[0006]
【課題を解決するための手段】本発明によれば、火入れ
醤油の濾過時、フアウリング物質が膜表面に沈着堆積し
て、水透過流束の低下した多孔質平板状膜を洗浄して、
水透過流束を回復させる方法において、多孔質平板状膜
を６０℃以上の熱水にてクロスフロー濾過方式にて洗浄
し、次いで、アルカリ水溶液で洗浄することを特徴とす
る。[Means for Solving the Problems] According to the present invention, when filtering pasteurized soy sauce, fouling substances are deposited and accumulated on the membrane surface, and the porous plate-like membrane in which the water permeation flux is reduced is cleaned.
The method for restoring the water permeation flux is characterized in that the porous flat membrane is washed with hot water of 60° C. or higher using a cross-flow filtration method, and then washed with an alkaline aqueous solution.
【０００７】本発明の方法によれば、凝固したタンパク
質等のフアウリング物質が膜表面に沈着堆積して、水透
過流束の低下した多孔質平板状膜は、先ず、温度６０℃
以上、好ましくは７０℃以上の熱水にてクロスフロー濾
過方式にて処理して、上記フアウリング物質を分解凝集
させ、次いで、熱水にアルカリを加えて、同様にクロス
フロー濾過方式にて処理する。この後、必要に応じて、
装置にアルカリ水溶液を充填したまま、放置し、その後
、多量の水で膜面を洗浄し、膜表面からフアウリング物
質を除去する。According to the method of the present invention, a porous flat membrane in which fouling substances such as coagulated proteins are deposited on the membrane surface and the water permeation flux is reduced is first heated to a temperature of 60°C.
The above is preferably treated with hot water of 70° C. or higher using a cross-flow filtration method to decompose and agglomerate the above-mentioned fouling substances, and then an alkali is added to the hot water and similarly treated using a cross-flow filtration method. . After this, if necessary,
The device is left filled with the alkaline aqueous solution, and then the membrane surface is washed with a large amount of water to remove fouling substances from the membrane surface.
【０００８】ここに、クロスフロー濾過方式とは、熱水
を膜面に沿つて流れるように供給し、一部を膜透過液と
して取出しながら循環させる濾過方式をいう。上記の方
法において、アルカリ水溶液は、最初に多孔質膜の熱水
処理に用いた熱水にアルカリを加えて調製するのが実用
上有利である。アルカリ水溶液の濃度は特に高濃度とす
る必要はなく、通常、０．１重量％以上の濃度であれば
十分である。[0008] Here, the cross-flow filtration system refers to a filtration system in which hot water is supplied so as to flow along the membrane surface, and a portion thereof is taken out as a membrane permeate and circulated. In the above method, it is practically advantageous to prepare the alkaline aqueous solution by first adding an alkali to the hot water used for the hot water treatment of the porous membrane. The concentration of the alkaline aqueous solution does not need to be particularly high; a concentration of 0.1% by weight or more is usually sufficient.
【０００９】本発明の方法において用いる多孔質膜は、
熱水及びアルカリ水溶液によつて膜性能や材質が劣化し
ないものであればよく、通常、ポリテトラフルオロエチ
レンやポリスルホンからなる多孔質膜が好適である。The porous membrane used in the method of the present invention is
Any material may be used as long as its membrane performance and material are not deteriorated by hot water and aqueous alkaline solutions, and porous membranes made of polytetrafluoroethylene or polysulfone are usually suitable.
【００１０】0010
【発明の効果】以上のように、本発明の方法によれば、
火入れ醤油の濾過時、フアウリング物質が膜表面に堆積
して、水透過流束の低下した多孔質平板状膜を、先ず、
６０℃以上の熱水にてクロスフロー濾過方式にて洗浄し
、次いで、アルカリ水溶液で洗浄することによつて、水
透過流束を容易に回復させることができる。[Effects of the Invention] As described above, according to the method of the present invention,
When filtering pasteurized soy sauce, fouling substances accumulate on the membrane surface and the water permeation flux is reduced.
The water permeation flux can be easily restored by washing with hot water of 60° C. or higher using a cross-flow filtration method, and then washing with an alkaline aqueous solution.
【００１１】[0011]
【実施例】以下に実施例を挙げて本発明を説明するが、
本発明はこれら実施例により何ら限定されるものではな
い。膜孔径０．２μｍのポリテトラフルオロエチレンか
らなる多孔質平板状膜を装着したプレート・アンド・フ
レーム型濾過装置を用いて、火入れ醤油を濾過したとこ
ろ、濾過開始前には２３８リツトル／平方メートル・時
であつた水透過流束がフアウリング物質による膜汚染に
よつて、７０リツトル／平方メートル・時まで低下した
。[Examples] The present invention will be explained below with reference to Examples.
The present invention is not limited in any way by these Examples. When pasteurized soy sauce was filtered using a plate-and-frame type filtration device equipped with a porous flat membrane made of polytetrafluoroethylene with a membrane pore diameter of 0.2 μm, the filtration rate was 238 liters per square meter per hour before filtration began. The water permeation flux was reduced to 70 liters per square meter hour due to membrane contamination by fouling substances.
【００１２】そこで、上記濾過装置に７５℃以上の熱水
を１５分間クロスフロー濾過方式にて循環させた結果、
水透過流束は１２０リツトル／平方メートル・時まで回
復した。次いで、上記熱水にアルカリを加えて、０．１
重量％濃度水溶液とし、これを１５分間、同様にクロス
フロー濾過方式にて循環させた後、４５分間放置して、
多孔質膜をアルカリ水溶液中に浸漬したところ、水透過
流束は２２０リツトル／平方メートル・時まで回復した
。[0012] Therefore, as a result of circulating hot water of 75°C or higher through the above filtration device for 15 minutes using a cross-flow filtration method,
The water permeation flux was restored to 120 liters/m2.hr. Next, add an alkali to the above hot water and add 0.1
After making an aqueous solution with a concentration of % by weight and circulating it for 15 minutes using the cross-flow filtration method, it was left to stand for 45 minutes.
When the porous membrane was immersed in an alkaline aqueous solution, the water permeation flux was restored to 220 liters/m2.hr.
Claims (1)
膜表面に堆積して、水透過流束の低下した多孔質平板状
膜を洗浄して、水透過流束を回復させる洗浄方法におい
て、多孔質平板状膜を６０℃以上の熱水にてクロスフロ
ー濾過方式にて洗浄し、次いで、アルカリ水溶液で洗浄
することを特徴とする火入れ醤油の濾過用多孔質平板状
膜の洗浄方法。Claim 1: A cleaning method for recovering water permeation flux by cleaning a porous flat membrane whose water permeation flux has decreased due to the accumulation of fouling substances on the membrane surface during filtration of pasteurized soy sauce. 1. A method for cleaning a porous flat membrane for filtration of pasteurized soy sauce, which comprises cleaning the porous flat membrane with hot water of 60° C. or higher using a cross-flow filtration method, and then cleaning with an alkaline aqueous solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3005121A JP3030469B2 (en) | 1991-01-21 | 1991-01-21 | Method for cleaning porous flat membrane for filtration of hot soy sauce |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3005121A JP3030469B2 (en) | 1991-01-21 | 1991-01-21 | Method for cleaning porous flat membrane for filtration of hot soy sauce |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04330923A true JPH04330923A (en) | 1992-11-18 |
| JP3030469B2 JP3030469B2 (en) | 2000-04-10 |
Family
ID=11602487
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3005121A Expired - Fee Related JP3030469B2 (en) | 1991-01-21 | 1991-01-21 | Method for cleaning porous flat membrane for filtration of hot soy sauce |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3030469B2 (en) |
-
1991
- 1991-01-21 JP JP3005121A patent/JP3030469B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP3030469B2 (en) | 2000-04-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |