JP2543892B2 - Hollow fiber membrane filter backwash water treatment method - Google Patents
Hollow fiber membrane filter backwash water treatment methodInfo
- Publication number
- JP2543892B2 JP2543892B2 JP62149091A JP14909187A JP2543892B2 JP 2543892 B2 JP2543892 B2 JP 2543892B2 JP 62149091 A JP62149091 A JP 62149091A JP 14909187 A JP14909187 A JP 14909187A JP 2543892 B2 JP2543892 B2 JP 2543892B2
- Authority
- JP
- Japan
- Prior art keywords
- fiber membrane
- hollow fiber
- membrane filter
- backwash water
- water
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 44
- 239000012528 membrane Substances 0.000 title claims description 30
- 239000012510 hollow fiber Substances 0.000 title claims description 29
- 238000000034 method Methods 0.000 title claims description 19
- 238000004062 sedimentation Methods 0.000 claims description 23
- 238000000926 separation method Methods 0.000 claims description 15
- 239000000654 additive Substances 0.000 claims description 13
- 230000000996 additive effect Effects 0.000 claims description 13
- 239000007787 solid Substances 0.000 claims description 13
- 238000011001 backwashing Methods 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 6
- 230000001172 regenerating effect Effects 0.000 claims description 2
- 239000010802 sludge Substances 0.000 claims description 2
- 239000002699 waste material Substances 0.000 description 18
- 239000007788 liquid Substances 0.000 description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000001914 filtration Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 5
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 5
- 239000003456 ion exchange resin Substances 0.000 description 5
- 229920003303 ion-exchange polymer Polymers 0.000 description 5
- 239000002244 precipitate Substances 0.000 description 5
- 239000006228 supernatant Substances 0.000 description 5
- 239000000498 cooling water Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 230000008929 regeneration Effects 0.000 description 4
- 238000011069 regeneration method Methods 0.000 description 4
- 229910052938 sodium sulfate Inorganic materials 0.000 description 4
- 235000011152 sodium sulphate Nutrition 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 239000011734 sodium Substances 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- -1 NaNO 3 Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000004931 aggregating effect Effects 0.000 description 1
- 238000001479 atomic absorption spectroscopy Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/04—Backflushing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/16—Use of chemical agents
- B01D2321/168—Use of other chemical agents
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Physical Water Treatments (AREA)
Description
【発明の詳細な説明】 ［発明の目的］ （産業上の利用分野） 本発明は、逆洗再生式の中空糸膜フィルタから発生す
る逆洗水中の懸濁固形分を迅速に沈降分離する中空糸膜
フィルタ逆洗水の処理方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is a hollow for rapidly sedimenting and separating suspended solids in backwash water generated from a backwash regenerative hollow fiber membrane filter. The present invention relates to a method for treating backwash water of a fiber membrane filter.
（従来の技術） 近年、BWRプラントにおいて冷却水中に発生するクラ
ッド（鉄酸化物が主成分の不溶解性固形物）を除去する
ために濾過装置として中空糸膜フィルタが導入されてい
る。(Prior Art) In recent years, in a BWR plant, a hollow fiber membrane filter has been introduced as a filtering device in order to remove a clad (insoluble solid matter containing iron oxide as a main component) generated in cooling water.
濾過装置として使用されてきた従来の粉末イオン交換
樹脂プリコート型フィルタでは、フィルタの濾過差圧が
上昇すると、濾過機能を回復させるために逆洗していた
が、その際生じた粉末樹脂と高濃度クラッドを含む廃水
を沈降分離槽へ導き、上澄み液と沈澱物に分けて処理さ
れていた。そして、ここで発生する二次廃棄物は主に乾
燥固化処理されていたが、粉末樹脂が使い捨てとなるた
め廃棄物量・コストの面でさらに改良が望まれていた。In the conventional powder ion exchange resin pre-coat type filter that has been used as a filtration device, when the filtration pressure difference of the filter rises, it was backwashed to recover the filtration function. The wastewater containing the clad was led to a sedimentation separation tank and separated into a supernatant and a precipitate for treatment. The secondary waste generated here is mainly dried and solidified, but since the powdered resin is disposable, further improvement is desired in terms of the amount and cost of the waste.
一方、中空糸膜フィルタは処理水質が非常によく、逆
洗により再生できるためクラッド以外の二次廃棄物量が
格段に低く抑えられ、さらに装置単位体積あたりの流量
が大きく、プリコート型フィルタに比べ装置スペースを
縮小できるという利点がある。しかし、中空糸膜フィル
タを逆洗再生する際に発生する逆洗水中の固形物は、粒
径が非常に小さく水中での密度も小さいために沈降性・
濾過性が悪く、この処理方法として決定的なものは存在
しなかった。On the other hand, the hollow fiber membrane filter has a very good treated water quality and can be regenerated by backwashing, so the amount of secondary waste other than the clad is remarkably low, and the flow rate per unit volume of the device is large. There is an advantage that the space can be reduced. However, the solid matter in the backwash water generated when the hollow fiber membrane filter is backwashed and regenerated has a settling property due to its very small particle size and low density in water.
Filterability was poor, and there was no definitive method for this treatment.
（発明が解決しようとする問題点） 本発明は上記事情に鑑みてなされたもので、その目的
は、逆洗再生式の中空糸膜フィルタから発生する逆洗水
中のクラッドの沈降性を向上させ、迅速に沈降分離する
ことができるような中空糸膜フィルタ逆洗水の処理方法
を提供することにある。(Problems to be Solved by the Invention) The present invention has been made in view of the above circumstances, and an object thereof is to improve the sedimentation property of the clad in the backwash water generated from the backwash regeneration hollow fiber membrane filter. Another object of the present invention is to provide a method for treating backwash water of a hollow fiber membrane filter that enables rapid sedimentation and separation.
［発明の構成］ （問題点を解決するための手段および作用） 上記目的を達成するために、本発明は逆洗再生式の中
空糸膜フィルタから発生する逆洗水に含まれる懸濁固形
分を沈降分離する中空糸膜フィルタ逆洗水の処理方法に
おいて、pH変化を伴わず導電率だけを増加させるような
添加剤を前記逆洗水に加えて懸濁固形分を迅速に沈降分
離するようにしたことを特徴とするものである。[Structure of the Invention] (Means and Actions for Solving Problems) In order to achieve the above object, the present invention provides a suspension solid content contained in backwash water generated from a backwash regeneration hollow fiber membrane filter. In the method for treating backwash water with a hollow fiber membrane filter for sedimentation, the additive that increases only the conductivity without pH change is added to the backwash water so that suspended solids can be rapidly sedimented and separated. It is characterized by having done.
（実施例） 以下、本発明の実施例を説明する。(Example) Hereinafter, the Example of this invention is described.
逆洗水への添加剤としては、水に可溶な中性塩である
こと及び沈澱処理後の上澄み処理に悪影響を及ぼさない
ものであることが条件である。ここではイオン交換樹脂
の再生廃液の主成分である硫酸ナトリウム（Na2SO4）を
選定した。The additive to the backwash water must be a water-soluble neutral salt and one that does not adversely affect the supernatant treatment after the precipitation treatment. Here, we selected sodium sulfate (Na 2 SO 4 ) which is the main component of the recycling waste liquid of the ion exchange resin.
（１）沈降性試験 まず、中空糸膜フィルタにより濾過・逆洗されて得ら
れる高濃度クラッド水の模擬として非晶鉄（無定形含水
Feクラッド）80％，α−Fe2O320％の組成の模擬クラッ
ドを純水で希釈しFeで1000ppmの模擬廃液（pH5.8,導電
率17.8μs/cm）を調製した。(1) Sedimentation test First, as a simulation of high-concentration clad water obtained by filtering and backwashing with a hollow fiber membrane filter, amorphous iron (amorphous hydrous
A simulated clad having a composition of 80% of Fe clad) and 20% of α-Fe 2 O 3 was diluted with pure water to prepare a simulated waste solution (pH 5.8, conductivity 17.8 μs / cm) of 1000 ppm with Fe.
次に、添加剤として特級試薬の無水硫酸ナトリウム10
0ppm水溶液を調製し、この導電率は167μs/cmであっ
た。そして、この試験では導電率設定のため5000ppmの
濃い水溶液を模擬廃液300mlに0.5〜2ml程度添加する方
法をとった。Next, anhydrous sodium sulfate 10
A 0 ppm aqueous solution was prepared and its conductivity was 167 μs / cm. Then, in this test, a method of adding about 0.5 to 2 ml of a concentrated aqueous solution of 5000 ppm to 300 ml of the simulated waste liquid was used to set the conductivity.
沈降性試験は、硫酸ナトリウムの添加で導電率を20,5
0,150,500,1000μs/cmに設定した模擬廃液を各300mlず
つ500mlのメスシリンダー５本に入れ、超音波をかけて
撹拌した後静置して一定時間毎に上澄み水をサンプリン
グし、原子吸光分析で測定されたFe濃度の変化から沈降
性を評価した。The sedimentation test was conducted with the addition of sodium sulfate to increase the conductivity to 20,5.
The simulated waste liquid set to 0,150,500,1000 μs / cm was put into five 500 ml graduated cylinders, each with 300 ml, stirred with ultrasonic waves, and allowed to stand, and the supernatant water was sampled at regular intervals and measured by atomic absorption spectrometry. The sedimentation property was evaluated from the change in the Fe concentration.
試験の結果、静置後の経過時間と設定導電率の関係は
第１表と第２図に示した通りで硫酸ナトリウム無添加の
No.1に比べ、約25ppm程度添加したNo.2の模擬廃液でも
静置後30分で初期濃度の1/20、６時間で1/100にまでFe
濃度が減少し、十分なクラッド沈降性改良効果が得られ
ることが分った。As a result of the test, the relationship between the elapsed time after standing and the set conductivity is as shown in Table 1 and FIG.
Compared to No. 1, even with the No. 2 simulated waste liquid added by about 25 ppm, it was 1/20 of the initial concentration in 30 minutes after standing and 1/100 in 6 hours.
It was found that the concentration decreased and a sufficient effect of improving the clad sedimentation property was obtained.
添加剤である硫酸ナトリウムは、クラッド粒子に対し
凝集効果があると考えられ撹拌して静置直後から、添加
量が多いものほど大きな径のフロックを形成して沈澱し
ていく過程が肉眼で観察できる。また、24時間以上経過
した試験後のシリンダを手で左右に揺らした程度では、
添加剤を加えたNo.2〜５の沈澱は殆ど拡散せず沈澱物の
安定性も確認された。It is considered that the additive sodium sulfate has an aggregating effect on the clad particles, and immediately after stirring and standing, the process of forming flocs with larger diameters and precipitating with larger addition amount is observed with the naked eye. it can. Also, after shaking the cylinder after testing for 24 hours or more,
The precipitates of Nos. 2 to 5 to which the additive was added hardly diffused, and the stability of the precipitate was also confirmed.
（２）中空糸膜フィルタ逆洗水の処理方式 第１図は、上記の沈降性試験の結果をもとに、中空糸
膜フィルタを濾過装置としたときの逆洗水処理方法に沈
降分離方式を採用した系統図である。 (2) Treatment method of backwash water for hollow fiber membrane filter Fig. 1 shows the method for treating backwash water when the hollow fiber membrane filter is used as a filtering device based on the results of the above sedimentation test. It is a system diagram which adopted.
同図において、プラントの冷却水系からの冷却水は中
空糸膜フィルタ１によって不純物を除去されたろ液はプ
ラントの冷却水系に戻される。一方、中空糸膜フィルタ
１によって捕捉されたクラッドはこのフィルタ１を逆洗
することにより濃縮されたクラッド逆洗水はバルブ８を
開放すると、沈降分離層２に溜められる。In the figure, the cooling water from the cooling water system of the plant has impurities removed by the hollow fiber membrane filter 1, and the filtrate is returned to the cooling water system of the plant. On the other hand, the clad captured by the hollow fiber membrane filter 1 is backwashed by the filter 1, and the concentrated clad backwash water is stored in the sedimentation separation layer 2 when the valve 8 is opened.
次に、この沈降分離層２に添加剤槽３から添加剤水溶
液またはイオン交換樹脂再生廃液を加えると、クラッド
粒子表面にイオンが付着し、このイオンによりさらに大
きな粒子に生成するので、クラッドは容易に沈澱するこ
とになる。このようにしてクラッド逆洗水は沈澱部分と
上澄み水とに分離するので、沈澱物はバルブ９より取出
して乾燥固化系に導く。なお、逆洗水の懸濁固形分の沈
降に遠心力を用いると、さらにその沈降速度を速めるこ
とができる。Next, when an additive aqueous solution or an ion-exchange resin regeneration waste liquid is added to the sedimentation separation layer 2 from the additive tank 3, ions adhere to the surfaces of the clad particles, and the ions are generated into larger particles. Will settle in. In this way, the clad backwash water is separated into the precipitate portion and the supernatant water, so that the precipitate is taken out from the valve 9 and led to the dry solidification system. If centrifugal force is used to settle the suspended solids of the backwash water, the settling speed can be further increased.
一方、上澄み水は定期的にオーバーフローバルブ10を
開放することにより廃液収集槽４に集められる。ここ
で、他の廃液処理系からの廃液を混入した後、バルブ11
を開放してこの廃液をポンプ12で中空糸膜フィルタ６に
送り再度濾過する。この逆洗水はバルブ13を開放して逆
洗水受けタンク７に溜め、ポンプ14により沈降分離槽２
に戻す。On the other hand, the supernatant water is collected in the waste liquid collection tank 4 by periodically opening the overflow valve 10. Here, after mixing waste liquid from another waste liquid treatment system, the valve 11
And the waste liquid is sent to the hollow fiber membrane filter 6 by the pump 12 and filtered again. This backwash water is stored in the backwash water receiving tank 7 by opening the valve 13, and the settling separation tank 2 is pumped by the pump 14.
Return to.
以上の沈降分離方式を採用するにあたっては、沈降分
離槽２内に添加する凝集剤が次の条件を満たすものでな
くてはならない。すなわち、 添加量が少量であること。（後段中空糸膜フィルタ
での処理負荷面から） 有効濃度範囲が広いこと。（処理系の操作面から） 沈降分離槽以降の機器への影響が少ないこと。（配
管の腐蝕等から） これらの条件に対し、硫酸ナトリウムはその凝集効果
が25〜1000ppmと広い濃度範囲で認められ、また中性塩
であるためクラッド廃液のpH変化を与えることもない。In adopting the above sedimentation separation method, the coagulant added to the sedimentation separation tank 2 must satisfy the following conditions. That is, the amount added should be small. (From the viewpoint of processing load in the second-stage hollow fiber membrane filter) Wide effective concentration range. (From the operation side of the processing system) Little influence on the equipment after the sedimentation separation tank. (From the corrosion of piping) Sodium sulfate has a cohesive effect in a wide concentration range of 25 to 1000 ppm under these conditions, and since it is a neutral salt, it does not change the pH of the clad waste liquid.
なお、添加剤としては上記Na2SO4の外に中性塩である
NaCl,NaNO3,Na3PO4,K2SO4,Kcl,K3PO4も同様の効果を奏
する。In addition to the above Na 2 SO 4 , an additive is a neutral salt.
NaCl, NaNO 3 , Na 3 PO 4 , K 2 SO 4 , Kcl, and K 3 PO 4 also have similar effects.
（３）沈澱したクラッドの処理方法 沈降分離槽２底部に沈澱した高濃度のクラッドは、バ
ルブ９を開放して沈降分離系統より分離し、セラミック
フィルタ等の高濃度装置にてさらに脱水濃縮し専用容器
内に保管する。(3) Method of treating precipitated clad The high-concentration clad precipitated at the bottom of the sedimentation tank 2 is separated from the sedimentation system by opening the valve 9 and dehydrated and concentrated by a high-concentration device such as a ceramic filter. Store in a container.
上記したような中空糸膜フィルタ逆洗水の処理方法の
他に、中空糸膜フィルタの逆洗時に中空糸膜フィルタ収
納容器にpH変化を伴わず導電率だけ増加させる添加剤を
予め注入しておいてから逆洗し、その逆洗水に含まれる
懸濁固形分を沈降分離するようにしてもよいし、また、
逆洗水を沈降分離槽に受入れ、逆洗水中の懸濁固形分を
添加剤を加えることにより濃縮分離した後、スラッジの
みを別の濃縮分離槽に入れ、これを更に濃縮分離するよ
うにしても上記実施例と同様の効果を奏する。In addition to the method for treating the backwash water of the hollow fiber membrane filter as described above, when backwashing the hollow fiber membrane filter, the hollow fiber membrane filter container is pre-injected with an additive that increases only the conductivity without pH change. It may be backwashed after that, and the suspended solids contained in the backwashed water may be separated by sedimentation.
The backwash water is received in the sedimentation separation tank, and the suspended solids in the backwash water are concentrated and separated by adding an additive, and then only the sludge is put into another concentration separation tank so that it is further concentrated and separated. Also has the same effect as the above embodiment.
［発明の効果］ 以上説明したように、本発明によれば、沈降性に欠け
るとされていた中空糸膜フィルタによるクラッド逆洗水
を迅速かつ簡便に沈降分離処理することが可能になり、
しかも、イオン交換樹脂の再生廃液等、他の処理系統か
ら発生する物質を有効利用する処理ができることにな
る、というすぐれた効果を奏する。[Effects of the Invention] As described above, according to the present invention, it becomes possible to rapidly and simply perform sedimentation separation treatment of clad backwash water by a hollow fiber membrane filter that is said to lack in sedimentation,
Moreover, there is an excellent effect that it is possible to perform a process for effectively utilizing a substance generated from another processing system such as an ion exchange resin recycling waste liquid.
第１図は本発明に係る逆洗水の沈降分離処理方式の系統
図、第２図は本発明に係る添加剤のクラッド水に対する
Fe濃度を示した図である。 1,6……中空糸膜フィルタ ２……沈降分離槽 ３……添加剤槽またはイオン交換樹脂再生廃液槽 ４……廃液収集槽 ５……廃液溜 ７……逆洗水受けタンク 8,9,11……バルブ 10……オーバーフローバルブ 12,14……ポンプFIG. 1 is a system diagram of a settling separation treatment method of backwash water according to the present invention, and FIG.
It is the figure which showed Fe concentration. 1,6 ...... Hollow fiber membrane filter 2 ...... Sedimentation separation tank 3 …… Additive tank or ion exchange resin regeneration waste liquid tank 4 …… Waste liquid collection tank 5 …… Waste liquid reservoir 7 …… Backwash water receiving tank 8, 9 , 11 …… Valve 10 …… Overflow valve 12,14 …… Pump
Claims (4)
る逆洗水に含まれる懸濁固形分を沈降分離する中空糸膜
フィルタ逆洗水の処理方法において、pH変化を伴わず導
電率だけを増加させる添加剤を前記逆洗水に加えて懸濁
固形分を迅速に沈降分離するようにしたことを特徴とす
る中空糸膜フィルタ逆洗水の処理方法。1. A method for treating backwash water of a hollow fiber membrane filter, in which suspended solids contained in backwash water generated from a backwash regenerative hollow fiber membrane filter are settled and separated, and the conductivity is maintained without pH change. A method for treating backwash water of a hollow fiber membrane filter, characterized in that an additive for increasing the amount of water is added to the backwash water so that suspended solids are rapidly sedimented and separated.
ることを特徴とする特許請求の範囲第１項記載の中空糸
膜フィルタ逆洗水の処理方法。2. The method for treating backwash water of a hollow fiber membrane filter according to claim 1, wherein centrifugal force is used to settle suspended solids of the backwash water.
ルタ収納容器にpH変化を伴わず導電率だけ増加させる添
加剤を予め注入しておいてから逆洗し、その逆洗水に含
まれる懸濁固形分を沈降分離することを特徴とする特許
請求の範囲第１項記載の中空糸膜フィルタ逆洗水の処理
方法。3. When the hollow fiber membrane filter is backwashed, the hollow fiber membrane filter container is preliminarily injected with an additive that increases the conductivity without pH change, and then the backwashing water is included in the backwashing water. The method for treating backwash water of a hollow fiber membrane filter according to claim 1, characterized in that the suspended solid content is separated by sedimentation.
懸濁固形分を添加剤を加えることにより濃縮分離した
後、スラッジのみを別の濃縮分離槽に入れて、これを更
に濃縮分離するようにしたことを特徴とする特許請求の
範囲第１項記載の中空糸膜フィルタ逆洗水の処理方法。4. The backwash water is received in a sedimentation separation tank, the suspended solids in the backwash water are concentrated and separated by adding an additive, and then only the sludge is put into another concentration separation tank, which is further separated. The hollow fiber membrane filter backwashing water treatment method according to claim 1, wherein the method is performed by concentrating and separating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62149091A JP2543892B2 (en) | 1987-06-17 | 1987-06-17 | Hollow fiber membrane filter backwash water treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62149091A JP2543892B2 (en) | 1987-06-17 | 1987-06-17 | Hollow fiber membrane filter backwash water treatment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63315191A JPS63315191A (en) | 1988-12-22 |
| JP2543892B2 true JP2543892B2 (en) | 1996-10-16 |
Family
ID=15467501
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62149091A Expired - Lifetime JP2543892B2 (en) | 1987-06-17 | 1987-06-17 | Hollow fiber membrane filter backwash water treatment method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2543892B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2697446B1 (en) * | 1992-11-03 | 1994-12-02 | Aquasource | Process for the treatment of a fluid containing suspended and dissolved materials, using separation membranes. |
| JP2001324593A (en) * | 2000-05-18 | 2001-11-22 | Japan Organo Co Ltd | Radioactive waste treatment system for boiling water type nuclear power plant |
-
1987
- 1987-06-17 JP JP62149091A patent/JP2543892B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63315191A (en) | 1988-12-22 |
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