JPH01104310A - Membrane separation - Google Patents
Membrane separationInfo
- Publication number
- JPH01104310A JPH01104310A JP25939487A JP25939487A JPH01104310A JP H01104310 A JPH01104310 A JP H01104310A JP 25939487 A JP25939487 A JP 25939487A JP 25939487 A JP25939487 A JP 25939487A JP H01104310 A JPH01104310 A JP H01104310A
- Authority
- JP
- Japan
- Prior art keywords
- membrane
- liquid
- treated
- membrane separation
- chloramine
- 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 97
- 238000000926 separation method Methods 0.000 title claims abstract description 36
- 239000007788 liquid Substances 0.000 claims abstract description 33
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000000460 chlorine Substances 0.000 claims abstract description 25
- 229910052801 chlorine Inorganic materials 0.000 claims abstract description 25
- QDHHCQZDFGDHMP-UHFFFAOYSA-N Chloramine Chemical compound ClN QDHHCQZDFGDHMP-UHFFFAOYSA-N 0.000 claims abstract description 16
- -1 ammonium ions Chemical class 0.000 claims description 7
- 229920005597 polymer membrane Polymers 0.000 claims description 6
- 239000002131 composite material Substances 0.000 claims description 5
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims description 4
- 244000005700 microbiome Species 0.000 abstract description 10
- 238000011109 contamination Methods 0.000 abstract description 8
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 abstract description 6
- 239000003795 chemical substances by application Substances 0.000 abstract description 5
- 230000001954 sterilising effect Effects 0.000 abstract description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 abstract description 3
- 239000005708 Sodium hypochlorite Substances 0.000 abstract description 3
- 235000019270 ammonium chloride Nutrition 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 abstract description 3
- 238000004659 sterilization and disinfection Methods 0.000 abstract description 3
- 238000000108 ultra-filtration Methods 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 230000003204 osmotic effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 7
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000001223 reverse osmosis Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 239000004952 Polyamide Substances 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 2
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 2
- 235000011130 ammonium sulphate Nutrition 0.000 description 2
- 239000004760 aramid Substances 0.000 description 2
- 229920003235 aromatic polyamide Polymers 0.000 description 2
- JSYGRUBHOCKMGQ-UHFFFAOYSA-N dichloramine Chemical compound ClNCl JSYGRUBHOCKMGQ-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 1
- 229920002396 Polyurea Polymers 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000000382 dechlorinating effect Effects 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 238000011033 desalting Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000009422 growth inhibiting effect Effects 0.000 description 1
- 239000012510 hollow fiber Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229920002492 poly(sulfone) Polymers 0.000 description 1
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 238000009287 sand filtration Methods 0.000 description 1
- 235000002639 sodium chloride Nutrition 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は透過膜による膜分離方法、特に透過膜を損傷
することなく、微生物による透過膜の汚染を防止するこ
とが可能な膜分離方法に関するものである。[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a membrane separation method using a permeable membrane, and particularly to a membrane separation method that can prevent contamination of the permeable membrane by microorganisms without damaging the permeable membrane. It is something.
逆浸透膜（ＲＯ）、限外濾過膜（ｔＪＦ）、ミリポアフ
ィルタ（ＭＦ）等の透過膜に加圧下に被処理液を供給し
て膜分離を行う方法では、被処理液中に含まれる微生物
が増殖してスライムを形成し、これが透過膜を汚染して
透過液量を低下させる。このような微生物による透過膜
の汚染を防止するため、被処理液に次亜塩素酸ナトリウ
ムなどの遊離塩素剤を添加し、遊離塩素により殺菌する
方法が行われている。また遊離塩素が存在する被処理液
に還元剤を添加して脱塩素したのち膜分離する方法が提
案されている（特開昭５９−２１３４９５号）６〔発明
が解決しようとする問題点〕
しかしながら、被処理液に遊離塩素を存在させて膜分離
を行う方法では、透過膜特にポリアミド、アラミド系等
の窒素含有基を有する高分子膜からなる透過膜は遊離塩
素に侵され、脱塩率、除去率等の膜分離能が悪化すると
いう問題点があった。In the method of membrane separation by supplying the liquid to be treated under pressure to a permeable membrane such as a reverse osmosis membrane (RO), ultrafiltration membrane (tJF), or Millipore filter (MF), microorganisms contained in the liquid to be treated are proliferates and forms slime, which contaminates the permeable membrane and reduces the amount of permeate. In order to prevent such contamination of the permeable membrane by microorganisms, a method is used in which a free chlorine agent such as sodium hypochlorite is added to the liquid to be treated, and the liquid is sterilized by the free chlorine. In addition, a method has been proposed in which a reducing agent is added to a liquid to be treated containing free chlorine to dechlorinate it and then perform membrane separation (Japanese Patent Laid-Open No. 59-213495).6 [Problems to be Solved by the Invention] However, In the method of performing membrane separation in the presence of free chlorine in the liquid to be treated, the permeable membrane, especially the permeable membrane made of a polymer membrane having a nitrogen-containing group such as polyamide or aramid, is attacked by free chlorine, resulting in a decrease in salt removal rate, There was a problem that membrane separation performance such as removal rate deteriorated.
特にポリスルホン等の支持膜の表面に超薄膜を形成した
複合膜が、低圧で高除去率を得ることができるものとし
て脚光をあびているが、上記超薄膜がポリアミド、ポリ
ベンズイミダゾール等の窒素含有基を有する高分子膜か
らなる場合、耐塩素性が悪く、膜分離能が低下しやすい
。In particular, composite membranes in which an ultra-thin film is formed on the surface of a support membrane such as polysulfone have been attracting attention as being able to obtain high removal rates at low pressure. When the membrane is made of a polymer membrane having the following properties, chlorine resistance is poor and the membrane separation ability tends to decrease.
また遊離塩素を含む被処理液を脱塩素後、膜分離する方
法では、透過膜、被処理液および透過液における微生物
の増殖を抑制することができず、スライム発生により透
過膜が汚染され、透過液量が低下するという問題点があ
った。In addition, in the method of membrane separation after dechlorinating the treated liquid containing free chlorine, it is not possible to suppress the growth of microorganisms in the permeable membrane, the treated liquid and the permeated liquid, and the permeable membrane is contaminated by slime generation. There was a problem that the liquid volume decreased.
この発明の目的は上記問題点を解決するため、透過膜を
損傷することなく、微生物による透過膜の汚染を防止し
、効率よく膜分離を行うことが可能な膜分離方法を提案
することである。The purpose of this invention is to propose a membrane separation method capable of efficiently performing membrane separation by preventing contamination of a permeable membrane by microorganisms without damaging the permeable membrane, in order to solve the above-mentioned problems. .
この発明は、被処理液を透過膜に供給して膜分離を行う
方法において、被処理液にクロラミンを存在させること
を特徴とする膜分離方法である。The present invention is a membrane separation method in which a liquid to be treated is supplied to a permeable membrane for membrane separation, and the method is characterized in that chloramine is present in the liquid to be treated.
本発明において使用する透過膜としては、逆浸透膜、限
外濾過膜、ミリポアフィルタなど、加圧下に被処理液を
供給して膜分離を行うすべての透過膜が含まれ、エレメ
ントの構造はスパイラル型、中空糸型、管型、平膜型な
ど任意の構造のものが使用できる。The permeable membranes used in the present invention include all permeable membranes that perform membrane separation by supplying the liquid to be treated under pressure, such as reverse osmosis membranes, ultrafiltration membranes, and Millipore filters, and the element structure is spiral. Any structure such as mold, hollow fiber type, tube type, or flat membrane type can be used.
本発明では、透過膜の材質として任意のものが使用でき
るが、耐塩素性のｔＪｓさい芳香族ポリアミド、ポリ尿
素、ポリピペラジンアミドなどの窒素含有基を有する高
分子膜に対して特に有効である。In the present invention, any material can be used for the permeable membrane, but it is particularly effective for chlorine-resistant tJs polymer membranes having nitrogen-containing groups such as aromatic polyamide, polyurea, and polypiperazine amide. .
透過膜の構造も任意のものが使用でき、均一な高分子膜
からなる透過膜でもよいが、支持膜上に超薄膜を形成し
た複合膜に対して効果的であり、特に超薄膜として窒素
含有基を有する高分子膜を形成した複合膜に対して有効
である。Any structure can be used for the permeable membrane, and a permeable membrane made of a uniform polymer membrane may be used, but it is effective for composite membranes in which an ultra-thin film is formed on a support membrane. It is effective for composite membranes formed of polymer membranes having groups.
本発明ではこのような透過膜により膜分離を行う際、被
処理液にクロラミンを存在させて膜分離を行う。クロラ
ミンは遊離塩素とアンモニウムイオンの反応物であって
、ｐＨによりモノクロラミン（ＮＨ２（４）およびジク
ロラミン（ＮＨＣｆｌ、 ）が生成する。In the present invention, when performing membrane separation using such a permeable membrane, membrane separation is performed in the presence of chloramine in the liquid to be treated. Chloramine is a reaction product of free chlorine and ammonium ion, and monochloramine (NH2(4)) and dichloramine (NHCfl) are produced depending on the pH.
これらのクロラミンの殺菌力は小さく、遊離塩素に比べ
て１１５０〜１／２００程度の殺菌力しかないが、増殖
抑制効果は十分あり、酸化力が小さいため、耐塩素性の
小さい窒素含有基を有する透過膜に対しても、膜透過率
等の膜状態を低下させることなく、スライム発生を防止
することができる。The bactericidal power of these chloramines is low, and is only about 1150 to 1/200 of that of free chlorine, but they have sufficient growth-inhibiting effects and have low oxidizing power, so they have nitrogen-containing groups with low chlorine resistance. For permeable membranes as well, generation of slime can be prevented without reducing membrane conditions such as membrane transmittance.
クロラミンは予め遊離塩素とアンモニウムイオンを反応
させて生成させ、これを被処理液に添加してもよいが、
被処理液に遊離塩素剤を添加して、遊離塩素により殺菌
を行った後、アンモニウムイオンを添加してクロラミン
を生成させ、これを透過膜に供給して膜分離を行うと、
被処理液の殺菌と膜分離時に増殖抑制が行えるため好ま
しい。この場合間欠的に、例えば１日に１〜２時間アン
モニウムイオンの添加を停止して遊離塩素を残留させる
と、透過膜を含む膜分離装置の殺菌が行えるので好まし
い。この場合でも透過膜が遊離塩素と接触する時間は短
いので、透過膜の損傷は小さい。Chloramine may be generated in advance by reacting free chlorine and ammonium ions, and this may be added to the liquid to be treated.
After adding a free chlorine agent to the liquid to be treated and sterilizing it with free chlorine, ammonium ions are added to generate chloramine, which is then supplied to a permeable membrane for membrane separation.
This is preferable because growth can be inhibited during sterilization of the liquid to be treated and membrane separation. In this case, it is preferable to stop the addition of ammonium ions intermittently, for example, for 1 to 2 hours a day, to allow free chlorine to remain, since the membrane separation device including the permeable membrane can be sterilized. Even in this case, the time that the permeable membrane is in contact with free chlorine is short, so damage to the permeable membrane is small.
上記方法において使用可能な遊離塩素剤としては、塩素
ガス、次亜塩素酸ナトリウムなど、従来より殺菌のため
用゛いられていたものが使用できる。As free chlorine agents that can be used in the above method, those conventionally used for sterilization, such as chlorine gas and sodium hypochlorite, can be used.
またアンモニウムイオンとしては硫酸アンモニウム、塩
化アンモニウム、アンモニア水などのアンモニウム塩ま
たは塩基を添加することにより生成可能であり、特に硫
酸アンモニム、塩化アンモニウム等の塩が好ましい。第
四アンモニウム塩は透過膜に悪影響を与える場合がある
ので好ましくなし兎。Further, ammonium ions can be generated by adding ammonium salts or bases such as ammonium sulfate, ammonium chloride, aqueous ammonia, and salts such as ammonium sulfate and ammonium chloride are particularly preferred. Quaternary ammonium salts are not preferred as they may have an adverse effect on the permeable membrane.
アンモニウムイオンの添加量は、残留する遊離塩素に対
して、重量比として２〜４倍アンモニウム添加がよく、
反応時間は２０秒以上がよい。アンモニウムイオンを添
加した被処理液のｐＨは４〜９、好ましくはＰ１１６〜
７が適当である。被処理液のＰＨにより次式によりモノ
またはジクロラミンが生成する。The amount of ammonium ion added is preferably 2 to 4 times the weight ratio of the remaining free chlorine.
The reaction time is preferably 20 seconds or more. The pH of the liquid to be treated to which ammonium ions have been added is 4 to 9, preferably P116 to
7 is appropriate. Depending on the pH of the liquid to be treated, mono- or dichloramine is produced according to the following formula.
ＮＨ３＋ＨＯＣＲ−）ＮＨ，Ｃｆｉ＋）１２０
（ｐＨ７以上）ＮＨ２Ｃｆｌ＋ＨＯＣΩ→ＮＨ（４２＋
８２０ （ｐＨ４〜７）クロラミンの生成により、
被処理液およびこれと接触する透過膜その他の膜分離装
置器壁における微生物の増殖は抑制され、これによりス
ライムの生成による透過膜の汚染は防止される。逆浸透
膜の場合、過剰添加のアンモニウムイオンは９０％以上
除去されるが、クロラミンは３０％程度しか除去されな
いで透過水側に移行するため、透過水および脱塩水槽に
おける微生物の増殖を抑制できる。NH3+HOCR-)NH,Cfi+)120
(pH 7 or higher) NH2Cfl+HOCΩ→NH(42+
820 (pH 4-7) Due to the production of chloramines,
The growth of microorganisms on the liquid to be treated and on the walls of the permeable membrane and other membrane separation devices that come into contact with the liquid is suppressed, thereby preventing the contamination of the permeable membrane due to the production of slime. In the case of reverse osmosis membranes, more than 90% of ammonium ions added in excess are removed, but only about 30% of chloramines are removed and transferred to the permeated water side, so it is possible to suppress the growth of microorganisms in the permeated water and desalinated water tank. .
こうして透過膜の汚染は防止され、透過液量の低下は防
止され。また遊離塩素による透過膜の損傷はなく、膜分
離率の低下はないから、効率よく膜分離を行うことがで
きる。In this way, contamination of the permeable membrane is prevented and a decrease in the amount of permeated liquid is prevented. Furthermore, since the permeable membrane is not damaged by free chlorine and the membrane separation rate is not reduced, membrane separation can be carried out efficiently.
以上の通り、本発明によれば、被処理液にクロラミンを
存在させて膜分離を行うようにしたので。As described above, according to the present invention, chloramine is present in the liquid to be treated to perform membrane separation.
遊離塩素による透過膜の損傷を防止しながら、微生物の
増殖を抑制して、スライムによる透過膜の汚染を防止す
ることができ、これにより膜分離能および透過液量の低
下を防止して効率よく膜分離を行うことができる。While preventing damage to the permeable membrane due to free chlorine, it can suppress the growth of microorganisms and prevent contamination of the permeable membrane with slime. This prevents a decrease in membrane separation capacity and permeate volume, making it efficient. Membrane separation can be performed.
水道水を砂濾過により前処理した後、硫酸を添加してｐ
Ｈ６〜６．５に調整して被処理液（導電率１８０〜２０
０μＳ／ｃｍ、 Ｎｕ、＜０．１ｍｇ＃！、ＦＩ ３．
５〜４．５．遊離塩素０．３〜０．７ｍｇ／β）とした
。この被処理液にＮＨ，ＣΩをＮＨ３として１ 、２ｍ
ｇＩＱ添加し、ポリアミド系複合膜からなる逆浸透膜を
透過膜とするモジュールＳｔｌ ７１０（東しく株）製
）を２本シリーズに配列した膜分離装置に１０”１３ｋ
ｇｆ／ａｍ”の運転圧力で供給して１回収率５０％で膜
分離を行った。比較例１としてＮ）１． Ｃρ無添加の
場合、比較例２としてＮａＨ’ＳＯ，添加により残留塩
素をＯｍｇ／（ｌとして同条件で膜分離を行った。After pre-treating tap water by sand filtration, sulfuric acid is added to
The liquid to be treated (conductivity: 180-20
0μS/cm, Nu, <0.1mg#! , FI 3.
5-4.5. Free chlorine was 0.3 to 0.7 mg/β). NH, CΩ is added to this liquid to be treated as NH3, and 1,2 m
A 10" 13K membrane separator is equipped with two module Stl 710 (manufactured by Toshiku Co., Ltd.) arranged in a series with gIQ added and a reverse osmosis membrane made of a polyamide composite membrane as the permeation membrane.
Membrane separation was carried out at a 1 recovery rate of 50% by supplying at an operating pressure of "gf/am".Comparative Example 1 was when N)1. Membrane separation was performed under the same conditions with Omg/(l).
これらの結果を表１に示す。These results are shown in Table 1.
以上の結果より、実施例の場合、脱塩能を維持しつつ、
スライムによる透過水量の低下を防止できるのに対し、
比較例１では脱塩率が低下し、比較例２では透過水量が
低下しているのがわかる。From the above results, in the case of the example, while maintaining desalting ability,
While it is possible to prevent a decrease in the amount of permeated water due to slime,
It can be seen that in Comparative Example 1, the desalination rate decreased, and in Comparative Example 2, the amount of permeated water decreased.
代理人 弁理士 柳 原 成Agent: Patent attorney Sei Yanagi Hara
Claims (4)
おいて、被処理液にクロラミンを存在させることを特徴
とする膜分離方法。(1) A membrane separation method in which a liquid to be treated is supplied to a permeable membrane to perform membrane separation, which is characterized in that chloramine is present in the liquid to be treated.
請求の範囲第１項記載の膜分離方法。(2) The membrane separation method according to claim 1, wherein the permeable membrane is a polymer membrane having a nitrogen-containing group.
は第２項記載の膜分離方法。(3) The membrane separation method according to claim 1 or 2, wherein the permeable membrane is a composite membrane.
ウムイオンを添加して生成したものである特許請求の範
囲１項ないし第３項のいずれかに記載の膜分離方法。(4) The membrane separation method according to any one of claims 1 to 3, wherein the chloramine is produced by adding ammonium ions to a liquid to be treated containing free chlorine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62259394A JPH0698277B2 (en) | 1987-10-14 | 1987-10-14 | Membrane separation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62259394A JPH0698277B2 (en) | 1987-10-14 | 1987-10-14 | Membrane separation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01104310A true JPH01104310A (en) | 1989-04-21 |
| JPH0698277B2 JPH0698277B2 (en) | 1994-12-07 |
Family
ID=17333524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62259394A Expired - Lifetime JPH0698277B2 (en) | 1987-10-14 | 1987-10-14 | Membrane separation method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0698277B2 (en) |
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01135506A (en) * | 1987-11-20 | 1989-05-29 | Toray Ind Inc | Method for producing purified water |
| JPH0252087A (en) * | 1988-08-12 | 1990-02-21 | Toray Ind Inc | Method for making pure water |
| JP2002320968A (en) * | 2001-04-27 | 2002-11-05 | Japan Organo Co Ltd | Membrane separation method |
| JP2006263510A (en) * | 2005-03-22 | 2006-10-05 | Kurita Water Ind Ltd | Slime preventing agent for membrane separation and membrane separation method |
| WO2007069558A1 (en) * | 2005-12-12 | 2007-06-21 | Organo Corporation | Process and apparatus for modifying separation membrane and separation membranes modified by the process |
| WO2011125764A1 (en) * | 2010-03-31 | 2011-10-13 | 栗田工業株式会社 | Treatment method using reverse osmosis membrane |
| WO2011125762A1 (en) | 2010-03-31 | 2011-10-13 | 栗田工業株式会社 | Combined chlorine agent, and manufacturing method and method of use for same |
| WO2013051192A1 (en) * | 2011-10-03 | 2013-04-11 | 川崎重工業株式会社 | Device for treating organic waste water and method for treating same |
| CN103189130A (en) * | 2010-10-29 | 2013-07-03 | 东丽株式会社 | Fresh water generation method and fresh water generation device |
| WO2015174136A1 (en) * | 2014-05-12 | 2015-11-19 | 栗田工業株式会社 | Method for processing free chlorine-containing waste water |
| JP2016028597A (en) * | 2010-03-19 | 2016-03-03 | バックマン・ラボラトリーズ・インターナショナル・インコーポレーテッドＢｕｃｋｍａｎ Ｌａｂｏｒａｔｏｒｉｅｓ Ｉｎｔｅｒｎａｔｉｏｎａｌ Ｉｎｃｏｒｐｏｒａｔｅｄ | Processes using antibiotic alternatives in bioethanol production |
| WO2016136304A1 (en) * | 2015-02-24 | 2016-09-01 | オルガノ株式会社 | Method for modifying reverse osmosis membrane, reverse osmosis membrane, treatment method for boron-containing water, and method for operating separation membrane |
| JP2016155074A (en) * | 2015-02-24 | 2016-09-01 | オルガノ株式会社 | Operational method for separation membrane, modification method for separation membrane, and separation membrane |
| JP6489276B1 (en) * | 2018-08-23 | 2019-03-27 | 栗田工業株式会社 | Slime control method of reverse osmosis membrane device |
| KR20210005853A (en) | 2018-04-26 | 2021-01-15 | 쿠리타 고교 가부시키가이샤 | Reverse osmosis membrane treatment method, method for inhibiting biofouling in water, and apparatus therefor |
| CN112250227A (en) * | 2020-09-11 | 2021-01-22 | 杭州娃哈哈科技有限公司 | Zero-emission alkaline electrolyzed water production device |
| WO2022158253A1 (en) | 2021-01-20 | 2022-07-28 | 栗田工業株式会社 | Membrane separation method |
| KR20230019412A (en) | 2020-05-28 | 2023-02-08 | 쿠리타 고교 가부시키가이샤 | Reverse osmosis membrane treatment method |
| WO2023120351A1 (en) | 2021-12-20 | 2023-06-29 | 栗田工業株式会社 | Method for suppressing microorganism contamination in water system |
| WO2023120350A1 (en) | 2021-12-20 | 2023-06-29 | 栗田工業株式会社 | Microorganism contamination prevention method for water system |
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| JPS52104472A (en) * | 1976-01-27 | 1977-09-01 | Ebara Infilco Co Ltd | Desalting method for seawater and brine |
| JPS63100998A (en) * | 1986-10-17 | 1988-05-06 | Toray Ind Inc | Production of ultrapure water |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52104472A (en) * | 1976-01-27 | 1977-09-01 | Ebara Infilco Co Ltd | Desalting method for seawater and brine |
| JPS63100998A (en) * | 1986-10-17 | 1988-05-06 | Toray Ind Inc | Production of ultrapure water |
Cited By (37)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01135506A (en) * | 1987-11-20 | 1989-05-29 | Toray Ind Inc | Method for producing purified water |
| JPH0811173B2 (en) * | 1987-11-20 | 1996-02-07 | 東レ株式会社 | Purified water manufacturing method |
| JPH0252087A (en) * | 1988-08-12 | 1990-02-21 | Toray Ind Inc | Method for making pure water |
| JP2002320968A (en) * | 2001-04-27 | 2002-11-05 | Japan Organo Co Ltd | Membrane separation method |
| JP2006263510A (en) * | 2005-03-22 | 2006-10-05 | Kurita Water Ind Ltd | Slime preventing agent for membrane separation and membrane separation method |
| WO2007069558A1 (en) * | 2005-12-12 | 2007-06-21 | Organo Corporation | Process and apparatus for modifying separation membrane and separation membranes modified by the process |
| JP2016028597A (en) * | 2010-03-19 | 2016-03-03 | バックマン・ラボラトリーズ・インターナショナル・インコーポレーテッドＢｕｃｋｍａｎ Ｌａｂｏｒａｔｏｒｉｅｓ Ｉｎｔｅｒｎａｔｉｏｎａｌ Ｉｎｃｏｒｐｏｒａｔｅｄ | Processes using antibiotic alternatives in bioethanol production |
| WO2011125764A1 (en) * | 2010-03-31 | 2011-10-13 | 栗田工業株式会社 | Treatment method using reverse osmosis membrane |
| WO2011125762A1 (en) | 2010-03-31 | 2011-10-13 | 栗田工業株式会社 | Combined chlorine agent, and manufacturing method and method of use for same |
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| JPWO2011125764A1 (en) * | 2010-03-31 | 2013-07-08 | 栗田工業株式会社 | Reverse osmosis membrane treatment method |
| CN103189130B (en) * | 2010-10-29 | 2016-03-23 | 东丽株式会社 | Method of making water and fresh water generator |
| CN103189130A (en) * | 2010-10-29 | 2013-07-03 | 东丽株式会社 | Fresh water generation method and fresh water generation device |
| US20130220924A1 (en) * | 2010-10-29 | 2013-08-29 | Toray Industries, Inc. | Fresh water generation method and fresh water generation device |
| JPWO2012057188A1 (en) * | 2010-10-29 | 2014-05-12 | 東レ株式会社 | Fresh water generation method and fresh water generation apparatus |
| JP2013078712A (en) * | 2011-10-03 | 2013-05-02 | Kawasaki Heavy Ind Ltd | Device and method for treating organic wastewater |
| CN103827042A (en) * | 2011-10-03 | 2014-05-28 | 川崎重工业株式会社 | Device for treating organic waste water and method for treating same |
| WO2013051192A1 (en) * | 2011-10-03 | 2013-04-11 | 川崎重工業株式会社 | Device for treating organic waste water and method for treating same |
| WO2015174136A1 (en) * | 2014-05-12 | 2015-11-19 | 栗田工業株式会社 | Method for processing free chlorine-containing waste water |
| JP2015213880A (en) * | 2014-05-12 | 2015-12-03 | 栗田工業株式会社 | Method for treating free chlorine-containing waste water |
| TWI702081B (en) * | 2015-02-24 | 2020-08-21 | 日商奧璐佳瑙股份有限公司 | Method of modifying reverse osmosis membrane, reverse osmosis membrane, method of processing boron-containing water, and method of operating separation membrane |
| KR20170102351A (en) * | 2015-02-24 | 2017-09-08 | 오르가노 코포레이션 | A method of reforming a reverse osmosis membrane, a reverse osmosis membrane, a method of treating boron-containing water, and a method of operating a separation membrane |
| WO2016136304A1 (en) * | 2015-02-24 | 2016-09-01 | オルガノ株式会社 | Method for modifying reverse osmosis membrane, reverse osmosis membrane, treatment method for boron-containing water, and method for operating separation membrane |
| JP2016155074A (en) * | 2015-02-24 | 2016-09-01 | オルガノ株式会社 | Operational method for separation membrane, modification method for separation membrane, and separation membrane |
| KR20210005853A (en) | 2018-04-26 | 2021-01-15 | 쿠리타 고교 가부시키가이샤 | Reverse osmosis membrane treatment method, method for inhibiting biofouling in water, and apparatus therefor |
| JP6489276B1 (en) * | 2018-08-23 | 2019-03-27 | 栗田工業株式会社 | Slime control method of reverse osmosis membrane device |
| JP2020028865A (en) * | 2018-08-23 | 2020-02-27 | 栗田工業株式会社 | Slime control method for reverse osmosis membrane device |
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