NEOSEPTA Ion exchange membrane
EDCORE Tubular membrane electrode apparatus

ASTOM Corporation

ACILYZER ED Electrodialyzer
ACILYZER EDR Electrodialysis reversal
ACILYZER DD Diffusion dialyzer
ACILYZER BPED Bipolar membrane electrodialyzer

PRODUCTS CATALOGUEION EXCHANGE MEMBRANES / Electrodialyzers, Diffusion Dialyzers

www.astom-corp.jp

ASTOM Corporation

World-class Ion Exchange Technology
ASTOM provides top quality products and services with its world-class hydrocarbon-based ion exchange
membranes and electrodialysis technology validated by more than fifty years of accumulation inindustries.
ASTOM s ion exchange membrane NEOSEPTA and its dialyzer, ACILYZER, onto which NEOSEPTA ismounted, offer excellent ionic separation technology.
Electrodialyzer

Ion exchange membrane

NEOSEPTA

P.3

Ion exchange membranes aremembranes that are selectively
permeable to ions with features suchas low electric resistance and highchemical stability.

ACILYZER ED P.5

Our electrodialyzers can desalt,
concentrate, refine and recover ionicsubstances in aqueous solution with
ion exchange membranes and thepower of electricity.

Electrodialysis reversal

ACILYZER EDR

P.7

The EDR is a kind of ED system
which is operated by periodicallychanging its polarit y to provide
better performance from acost- ef fec tive and maintenancestandpoint as compared to those of
conventional ED.

Ion Exchange Membranes
Tubular membraneelectrode apparatus

EDCORE P.11

The tubular membraneelec trode apparatus isdifferent from an ordinary
sheet type ion exchange
membrane and of fers
various other usefulcharacteristics.

Electrodialyzers, Diffusion Dialyzers

Bipolar membrane electrodialyzer

ACILYZER BPED P.9

The device integrates bipolar membranes tosplit water into proton and hydroxyl ion, results
in producing an acid and a base from acorresponding salt such as an inorganic salt
and an organic salt.

Diffusion dialyzer

ACILYZER DD P.8

The device recovers free acid from waste acidusing concentration difference as a driving
force for acid transfer across the membrane.
This system achieves low operating costbecause of its limited use of electricity.

Important Notice to Purchaser
You must evaluate and determine whether product is suitable for your intended application. Since conditions of product use areoutside of our control and vary widely, the following is made in lieu of all express or implied warranties (including the warranties ofmerchantability or fitness for particular purpose) : ASTOM's only obligation and your only remedy is replacement of product that isshown to be defective when you receive it. In no case will ASTOM be liable for any special, incidental damages based on breach of
warranty or contact, negligence, strict tort, or any other theory.
1Applications

Applied technology
・Application

Salt Production

Electrodialysis ACILYZER ED

・Salt production from seawater［Detail in P.13］

Foods/Pharmaceuticals

Electrodialysis ACILYZER ED

・Desalination of soy sauce［Detail in P.13］
・Desalination of amino acids
・Desalination of plum seasoning liquid and

Bipolar membrane electrodialysis ACILYZER BPED
・Production of organic acid from organic acid salt
(production of gluconic acid)［Detail in P.13］
・Production of amino acid from amino acid salt

plum vinegar

・Desalination of organic acids
・Desalination of carbohydrate solution(desalination of oligo saccharide)［Detail in P.13］
・Desalination of cheese whey
・Stabilization of wine・Desalination of intermediate for medicines

Drinking Water Production

Electrodialysis reversal ACILYZER EDR・Desalination and removal of hardness from underground water［Detail in P.14］
・Removal of nitrate nitrogen from underground water［Detail in P.14］

Waste Solution Treatment

Electrodialysis ACILYZER ED

・Desalination/concentration of leachatefrom landfill［Detail in P.14］
・Desalination/concentration of waste solution

Bipolar membrane electrodialysis ACILYZER BPED
・Production of acid and alkali from waste solution
with salt［Detail in P.15］(from the manufacturing process ofsemiconductors/metals)［Detail in P.15］

Acid / Alkali Recovery

Diffusion dilalysis ACILYZER DD

Bipolar membrane electrodialysis ACILYZER BPED

Electrodialysis / ACILYZER ED /Diffusion dilalysis ACILYZER DD

Electrodialysis ACILYZER ED

Ion exchange membranes NEOSEPTA

Tubular membrane electrode apparatus EDCORE

・Acid recovery of stainless pickling process［Detail in P.16］

Other fields

・Production of acid and alkali from inorganic salt

・Recovery of alkali waste solution［Detail in P.17］

・Acid recovery of aluminum plate
pickling process［Detail in P.16］
・Acid recovery of aluminum foil
pickling process［Detail in P.17］
・Acid recovery of metal pickling process

・Production of ultra pure water・Membrane for batteries

・Electric deposition coating

Electrodialysis ACILYZER ED
・Desalination of deep sea water・Recovery of plating solution
・Recovery of Amine
2

Ion exchange membrane

NEOSEPTA

About ion exchange membranes

Ion exchange membranes are selectively permeable to ions and are
divided into cation exchange membranes and anion exchange
membranes.
Since negative - charged groups are fixed to cation exchange
membrane, anions are rejected by the negative charge and cannot
permeate through the cation exchange membrane (Figure 1-1). This isbecause cation exchange membranes are only permeable by cations.
The anion exchange membranes per form the opposite way comparedto cation E xchange membranes (Figure 1-2). These selec tive
permeations are carried out by DC current at an electorodialyzer.
+

Na

−

−

−

Na+

Na+
−
−
−

−

Na+

Na+

−
−

−

−
−

−

−
−

＋

ClAnode

−

+

＋

＋
＋

Na+

Cl-

＋

Cl-

Cl-

+

＋

＋

＋

＋

＋

Cl-

Cl-

＋
＋

-

＋

＋

＋

＋

＋

Cathode

−

-

−

−

−

Cathode

Anode
+

+

−

＋
＋

Cation exchange membrane

Anion exchange membrane

Figure 1-1: Selective permeability of cation exchange membrane

Figure 1-2: Selective permeability of anion exchange membrane

Differences between ion exchange membranes and ion exchange resins
Similar behavior happens in ion exchange resin. The ion exchange resin is in the granular form and performs as adsorptive exchange ofions (Figure 2). But it requires regeneration when adsorptive capacity is consumed. On the contrary, as the ion exchange membraneallow ions to permeate by DC electric current, no regeneration is required and allows for continuous use for an extended period of time.

Na+

Emission H+

H

H

Na+

Cationexchange
resin

H
H

H

H

H
H

Adsorptive
exchange

Na
Cationexchange
resin

H
H

H

Na

Figure 2: Ion exchange resins

H

Emission

H+

H
H

Characteristics of ion exchange membrane NEOSEPTA
1 High ionic selectivity

NEOSEPTA has excellent ionic selectivity which enables an efficient operation of electrodialysis.

2 Low electric resistance

Although NEOSEPTA is provided with backing material for reinforcement, the electric resistance is low which is very importantfor plant operation costs.

3 High mechanical strengthWith backing material for reinforcement, NEOSEPTA demonstrates physical strength and ease of handling.

4 High chemical stability

NEOSEPTA is stable against various kind of chemicals.

5 High dimensional stability

Since NEOSEPTA has a chemically stable structure, it demonstrates high dimensional stability in a practical use by limiting swellingand shrinking resulting from change of temperature, composition, concentration, etc.

6 Low diffusion of solute and solvent

Since NEOSEPTA has a low diffusion coefficient of solute or solvent, undesired back diffusion or transfer can be minimized.

7 Ability to separate monovalent ions and multivalent ions

Specific membranes enable separation of monovalent and multivalent ions in the solution.
3

Application range of Electrodialysis
1mm
100μm

Razor blade
Mist

Hair

10μm

PollenMF

Red blood cells

1μm

Yeast fungi

Microfiltration
membrane

Bacteria

Colon bacilli

Emulsion

100nm
10nm Prion
1nm

Inorganic colloid

Virus

Globulin
Hemoglobin
AlbuminInsulinProteinUF

Ultrafiltration
membraneEndotoxin

NF

Nano-filtration
Sucrosemembrane
Na+
ED
RO
Electrio- Reverse osmosis
H 2O
dialysismembraneHydrogen atom
Electrodialysis (Ion exchange membrane)

Inorganic ions

〔

0.1nm

〕

Grades and properties ーStandard-grade membranes and special-grade membranes of NEOSEPTA
Standard-grade membranes: Used for general concentration and desalination.
Special-grade membranes: We have various membranes with specific characteristics such as selective
permeability for monovalent ions, chemical stability, etc.

Handling precaution for NEOSEPTA membranes
To maximize the performance of NEOSEPTA, please read the following instructions.
1 Keep the NEOSEPTA wet and never let it become dry.

2 To prevent damage and deterioration of the membrane, avoid folding or contact with foreign substances.
3 When storing, be sure to keep the NEOSEPTA in a dark and cool place to avoid drying.
4 Prevent the membrane from contacting solutions containing oil, oxidizing agents,
and/or polymer electrolyte (surfactant, etc.).

Comparison table for detailed specification of
Cation/Anion Exchange Membrane
Cation Exchange MembraneStandard grade

Title

CSE
Type

Characteristics

Characteristics

Electric resistance(Ω・cm2)
Burst strength(MPa)
Thickness(mm)Application

Recommended
field ofapplication

CMB

Anion Exchange MembraneStandard grade

CXP-S

ASE

Strong Acid (Na type)Special grade

AHA

AXP-D

Strong Base (CI type)

AID
Weak Base(CI type)HighmechanicalstrengthHigh mechanicalstrength / Alkali
resistanceMonovalentcationpermselectivityHighmechanicalstrengthHigh mechanicalstrength / Alkali
resistanceMonovalent
anion
permselectivity

Protonblocking

1.8

4.5

2.0

2.6

4.1

2.5

4.3

≧0.35

≧0.40

≧0.20
0.30

≧0.35

≧0.90

≧0.20
0.30

≧0.70
0.15

0.16

・Desalination offoods
・Desalination /and
concentration of
inorganic salt・Removal of
hardness andnitrogen fromundergroundwater
Temperature(℃)
≦40
60

pH

Special grade

0-14

0.21

0.10

・Alkali recovery

・Acid recovery

・Acid and alkali
production(BPED)

・Separation of
metals

0.15

・Desalination offoods

・Salt production

・Desalination/
concentration of
inorganic salt

≦60

≦40

・Removal of
hardness andfromundergroundnitrogenfromwater
underground
water
≦40
60

0-14

0-10

・Diaphragm

0-14

0.22

・Alkali recovery
・Diaphragm

0.13
0.10

0.16

・Desalination offoods

・Acid recovery(DD)・Salt production

・Production ofacids and alkalis(BPED)

・Nitrogenremoval fromunderground
water

≦60

≦40

≦40

0-14

0-8

0-2
0-8

Electric resistance : Measured on alternative current after equilibration with a 0.5N-NaCl solution at 25℃ (0.5N-HCl solution as for AID membrane)
Burst Strength : Mullen Bursting strength
Thickness : Wet membrane
CXP-S, AXP-D and AID membranes are new products, so the above specifications are subject to change without any notice for product improvement
Please contact us about the product not on the list and used for other applications

Astom s ion exchange membrane NEOSEPTA and our high performance dialyzer, ACILYZER,
which integrates NEOSEPTA, offer efficient separation technology on the ionic substance level.
4Electrodialyzer

ACILYZER ED
About Electrodialysis

The electrodialyzer uses permselective ion exchange membranes
and electrical energy to separate ionic substances in aqueous
solution, enabling efficient desalination, concentration, refining andrecovery.
Electrodialysis is a separation technology utilizing electrophoresisof ionic substances in solutions and the selective permeability ofion exchange membranes. There are two types of ion exchange
membranes. Cation exchange membrane selectively allows cation
permeation and anion exchange membrane selectively allows
anion permeation. In an electrodialyzer, a large number of thesemembranes are arranged alternately between two electrodes anddirect current is applied to separate ions in solution (Figure 3).

C outlet

C

A

+

A

Na+

+

Cl-

A

Na +

Na+

Cl-

Na+

Cl-

Na+

CC

−

Na+

ClDC

-

Cl-

Na+
Cl-

D outlet

Na+

Na+

Cl-

Na+
Cl-

C

Cathode

Anode

Cl-

C

Cl-

DC

CC

DC

Feed solution

A: Anion exchange membrane
C: Cation exchange membrane
CC: Concentration compartments
DC: Desalination compartments

Concentrated solution
Figure 3: Principle chart

Desalinated solution

Concentrated solution
+

C

A

C

Electrodialyzer
stack

-

Cathode

Anode

+

A

−

Feed solution

Electrode solution tankFeed solution tankConcentrated solution tank
Figure 4: Electrodialyzer flow chart

5

A: Anion exchange membrane
C: Cation exchange membraneCharacteristics of Electrodialyzer ACILYZER ED
1 Desalinates, concentrates, refines and recovers ionic substances.
2 Selectively separates ionic substances.

3 Removes ionic substances from non-ionic valuables.

4 Requires no heating or pressurization which keeps components consistent.
5 The rates of desalination and concentration can be controlled.

6 No regeneration required and continuous operation for an extended period of time is possible.
7 Electrodialyzer produces a low noise and low vibration compared with RO
and also features ease of handling.

Application examples of Electrodialyzer ACILYZER ED●

Salt production from seawater●

Desalination of soy sauce●

Desalination of oligosaccharide●

Desalination/concentration of leachate from a landfill●

Desalination/concentration of processing waste solution●

Acid recovery of aluminum plate pickling process●

Recovery of alkali waste solution

Line up of ACILYZER ED

Ako Plant. Nihonkaisui Co.,Ltd.

AC02

Model
Small scale
Medium scale

Large scale

AC25

AC50

AC140

standard processing capacity Scale of standard equipment

AC02

10L/Hr80(W)×64(D)×142(H)cm

AC10

100L/Hr

200(w)×130(D)×180(H)cm

AC25

1,000L/Hr

350(w)×140(D)×210(H)cm

AC50

1,000L/Hr or more

AC140

10,000L/Hr or more

Please contact us directly
for information.

Standard processing capacity indicates 95% desalination ,i.e., 6% (1N) salt water can be desalinated down to 0.3% (0.05N).

6

Electrodialysis Reversal

ACILYZER EDR
About Electrodialysis Reversal

The EDR is a kind of ED system, which is operated by periodicallychanging its polarity to provide better, more cost-effective performanceand maintenance work compared to those of conventional ED (Figure 5).

Desalinated water Concentrated water Desalinated water

A

C

-

C

S

−

Cl

S

Cl-

S

Na+

Na+
Desalinationcompartment

S

C

Na+

Concentrationcompartment

A

Desalinationcompartment

+

Cl-

Na

Na+

S

S
+

Concentrationcompartment

Na+
Desalinationcompartment

A: Anion exchange membrane
C: Cation exchange membrane
S: Scale

Cl

-

-

ClS

Na

+

Concentrated
water

Polarity
conversion

A

C

EDR stack − Desalination Concentration +

Raw
water

S

Cathode

Anode

Cl

-

Normaloperation+

Concentrated water Desalinated water Concentrated water+

Desalinated
water

+

Anode

Cathode

Cl-

A

−

−

Desalinatedwater

Reverseoperation

EDR stack + Concentration Desalination −Concentrated
water

Raw
water
Concentrationcompartment
Figure 5: Principles of Electrodialysis Reversal

Characteristics of electrodialysis reversal ACILYZER EDR

1 High water recovery
2 Scale deposit can be prevented
3 Improves the durability of membranes.
4 Saves power consumption.
5 Desalination ratio of raw water can be easily controlled.
6 Water with a high level of SiO2 can be treated without forming precipitation on ion exchange membrane.

Application examples of electrodialysis reversal ACILYZER EDR●●

The desalination and removal of hardness component from underground water
Removal of nitrate nitrogen from underground waterLine up of ACILYZER EDR
Medium scale
Large scale
7

Model
AC17R
AC70R

Standard processing capacity Scale of standard equipment
2,000L/Hr
Please contact us directly
for information.
2,000L/Hr or more

Diffusion Dialyzer

ACILYZER DD
About Diffusion Dialyzer

Dif fusion dialysis recovers acid using a concentration dif ference ofsolution on both sides of the ion exchange membrane.
In one example of dif fusion dialysis for recovering acid, only anion
exchange membrane is put between waste acid compartment and acidrecovery compartment. With supplying waste acid containing metal ion
through the bottom of waste acid compartment and water through the topof acid recovery compartment, free acid from the waste acid permeates
through the anion exchange membrane into the water side by diffusion, driven by the concentration difference between each solution
while metal ion does not permeate due to the rejection from the anion exchange membrane (Figure 6).
Water (H2O)

Deacidified solution
Acid

Acid

Metal
salt

Acid

Acid

Metal
salt
Acid

Acid

Acid
Metal
salt

Acid

Acid

Acid
Recovered acid solution

Waste acid(from pickling process)

A: Anion exchange membrane

Figure 6: Principles of diffusion dialysis

Diffusion dialysis stack

Water
Steam

To pickling process
From pickling process

Deacidified
solution treatment

FilterWaste acid tank

Recovered acid tank

Water tank

Deacidified solution tank

Figure 11: Diffusion dialyzer flow chart

Characteristics of diffusion dialyzer ACILYZER DD

1 Efficiently recovers free acid from waste acid discharged from the pickling process.
2 Provides low operation cost since diffusion transfer is driven by a concentration difference.
3 Recovers and recycles free acid, which reduces neutralization cost for waste acid.
4 Removes metals continuously from the pickling processing tank which allows easy control ofconcentration in recovered acid tank.

5 A simple structure makes equipment maintenance easy.

Application examples of diffusion dialyzer ACILYZER DD●●

Acid treatment
Acid recovery of aluminum plate pickling process●●

Acid recovery of aluminum foil pickling process
Acid recovery of the metal pickling processLine up of ACILYZER DD
Small scale
Medium scale
Large scale

Model
AC02D
AC10D
AC25D
AC50D

Standard processing capacity Scale of standard equipment
0.4L/Hr80(w)×64(D)×142(H)cm
20L/Hr200(w)×130(D)×180(H)cm
250L/Hr
350(w)×140(D)×210(H)cm
Please contact us directly
250L/Hr or more
for information.
8

Bipolar Membrane Electrodialyzer

ACILYZER BPED
About Bipolar Membranes

A bipolar membrane is an ion exchange membrane composed of ananion exchange layer and a cation exchange layer (Figure 10).
Applying bipolar membrane with DC current, water is split inside themembrane and then proton (H＋) and hydroxyl ion (OH−) are generated.
This unique function of water splitting is utilized for production of anacid and a base from a corresponding salt in combination withconventional monopolar ion exchange membrane.

About Bipolar Membrane Electrodialysis
By supplying inorganic salt (e.g., Na 2 SO 4) to the 3 compartment process bipolar membraneelectrodialysis stack (Figure 8), which combines anion, cation and bipolar membranes, the anion(SO 4２−) will permeate through the anion exchange membrane and combine with the H+ ion whichis split at the bipolar membrane to produce acid (H 2SO４). On the other hand, the cation (Na＋) will
permeate through the cation exchange membrane and combine with the OH− ion which is split at
the bipolar membrane to produce alkali (NaOH) (the opposite reaction of neutralization will occur).
Organic acid and alkali are produced by supplying organic acid salt (weak acid salt) into the 2compartment bipolar electrodialyzer stack (Figure 9) that is made of bipolar membranes and cationexchange membranes combined together.

Bipolar Membrane

Desalination
NaOH

C
Na+

Anode

BP

SO42-

+

A

LA LC

Na+

Na+
BP

SO42-

H2SO4

C

SO42-

H+

OH -

H 2O

H22O

H 2O

H 2O

Na+

Desalinationcompartment

Na+
Alkalinecompartment

BP

SO42-

OH -

Acid
compartment

-

Na+

H+

Na+

LA LC

Cathode

+

A

LA LC

Acid
compartment−

Na+

Desalinationcompartment

Alkalinecompartment

Na2SO4
H2O
Figure 8: Na 2SO 2 based 3 compartment process of bipolar membrane electrodialysis

BP: Bipolar Membrane
LA: Anion Exchange layer
LC: Cation Exchange layer
A: Anion exchange membrane
C: Cation exchange membrane
NaOH+

RCOONa
H2O

BP

RCOO-

Na+

Na+

BP

RCOOH

C

LA LC

LA LC

RCOO- Na+

Na+

H+

OH -

H H+

OH -

H 2O

H 2O

H 2O

H 2O

Acid
compartment

Alkalinecompartment

Acidcompartment

BP−

Alkalinecompartment

BP: Bipolar Membrane
LA: Anion Exchange layer
LC: Cation Exchange layer
C: Cation exchange membrane
Figure 9: Organic acid salt-based 2 compartment process bipolar membrane electrodialysis

9

Cathode

Anode
+

C

LALC

Principles of Bipolar Membrane
-

+

-

H 2O

H 2O

Anion exchange layer

Water splitting voltage*1 ………… 1.0V*2

Cathode

Anode
+

OH

H+

Water splitting efficiency*1 ……… ≧0.98
Burst strength ……………………… ≧0.7MPa−

Thickness …………………………… 0.28mm

Cation exchange layer*1 1N NaOH・1N HCl 10A/dm2 30°
C*2 Potential difference measured between silver-silver chloride electrodes

Bipolar membrane
H2O→H +OH+

Specifications of Bipolar Membrane-

Figure 10: Principles of Bipolar Membrane

Example of production with Bipolar Membrane Electrodialyzers
Organic acid salt
Inorganic salt

Organic Lactic acid, Citric acid, Tartaric acid, Gluconic acid,acid Ascorbic acid, Methanesulfonic acid, Salicylic acid

Bipolar membraneelectrodialysis

Alkali

Sodium hydroxide, Potassium hydroxide,
Ammonium hydroxide

Acid

Nitric acid, Sulfuric acid, Hydrochloric acid,
Hydrofluoric acid, Phosphoric acidCharacteristics of Bipolar Membrane Electrodialyzer ACILYZER BPED
1 Splits water into acid (H+) and alkali (OH-) with relatively low voltage.
2 Due to the absence of electrode reaction, no oxidation-reduction reaction takes place.
Therefore, there will be no byproduct.

3 Produces acid and alkali from inorganic salt or organic acid salt in a single process.
4 Controls the concentration rate of acid and alkali.
5 Different from electrolytic processing, no electrodes are required for through every single cell and,
therefore, fewer fumes generated.

6 Produces less waste solution.
7 Withstands continuous operations for an extended time since no regeneration process,like ion exchange resin process, is required.

Application examples of Bipolar Membrane Electrodialyzers
Production of organic acid from organic acid salt
Production of amino acid from amino acid salt
● Production of acid and alkali from waste solution with salt
● Production of acid and alkali from inorganic salt●●

Line up of ACILYZER BPED
Model

Standard processing
Scale of standard equipment
capacity

AC3B-02 / AC2B-02

15L/Hr140(W)×70(D)×150(H)cm

Medium scale AC3B-10 / AC2B-10

200L/Hr

220(W)×180(D)×170(H)cm

200L/Hr or more

Please contact us directly
for information.

Small scale

Large scale

AC3B-50 / AC2B-50

AC3B-02 / AC2B-02

AC3B-50 / AC2B-50

3B in the model number refers to the 3 compartment process and 2B refers to 2 compartment process.
Standard processing capacity indicates that 7% (1N) sodium sulfate solution can be processed down to 3.5 % (0.5N) through the 3 compartment process.
10

Tubular membrane electrode apparatus

EDCORE
About EDCOREEDCORE is a tubular membrane electrode apparatus utilizing of
seamless tubular ion exchange membranes. It is used to recover
free anion occurring during the electro deposition coating process
and other processes. Dif ferent from products of ordinary ion
exchange membrane sheet, it offers various unique features.

Characteristics of tubular membrane electrode apparatus EDCORE

1 High physical strength

EDCORE is a simply structured electrode apparatus that requires no supporting device because the membrane maintains excellent
physical strength. Since there is no supporting device, it maximizes the membrane area (conductive area) and anolyte circulation rate
which contributes to a lower outbreak of foreign substances such as bacteria.

2 Reduction of deposits

The membranes are smooth surface and easy to cope with dimensional changes so that no wrinkles occur. Its wrinklelessconstruction prevents substances from depositing and minimizes the risk of coating failures due to the deposits.

3 Low permeability of non-ionic substances

Since there is no permeability for non-ionic substances and the EDCORE s permeability is zero for water of 0.8MPa or less, it can
prevent contamination of the electrode solution.

4 Easy handling

The EDCORE is light weight and sturdy, and able to be handled in a dry condition.
Its compact size makes flexible installations and easy maintenance is possible.

Detailed specifications of EDCORE
Product
Membrane type
Shape
Material
External dimension
Transport number
Material
External dimension

MembraneElectrode
Potting material

LengthWeightLine up
Circulation amount of anolyte
Applicable temperature range
Water permeability

Line up

OthersAnion exchange type membrane electrode apparatus
Strong basic tubular anion exchange membrane
Tubular and seamless (constant thickness)
Polyolefin-based + styrene/divinylbenzene-based material
Φ63mm
≒98%
SUS316
Φ48.6mm
Rigid PVC
Less than 4,000mm (negotiable)
Approximately 15kg each in case of open vertical model with effective membrane length 2,100mm
Open vertical model / Closed vertical model / Closed horizontal model≧3L/minutes (per each)
0-40℃
0 (up to 0.8MPa)

Structure of EDCORE

Anolyte inlet

Principles of electro deposition coating
Anolyte inlet

Anolyte hose
Insulation cap

+

Anode

+

Cathode−outletTubular ion
exchange membrane

WET
DRY

Anolyte overflow

Electrode cable

Anode

Electrode
Anolyte circulating route
Flow of neutralizing agent（CH3COO-）

Figure 11: Structure of EDCORE

Coated object
Free anion (Neutralizing agent)

Coating

Components of paints

Figure 12: Principles of electro deposition coating

Application examples of tubular membrane electrode apparatus EDCORE●

11

Electro deposition coating for automobiles, building materials, consumer electronics, etc.

Desktop Electrodialyzer

You can check the availability of your requested electrodialysis through tests utilizing the desktop electrodialyzer.

Electrodialyzers MICRO ACILYZER S3

Electrodialysis test is available.
Suitable membrane combination can beselected by changing type of cartridge.
● Conductivity, current, time and voltage areindicated.
●●

MICRO ACILYZER S3S3 cartridge

Bipolar Membrane Electrodialyzer ACILYZER EX3B

Electrodialysis test with bipolar membrane is available.
Normal electrodialysis test is also available.
● Suitable membrane combination can be selected by changing type of cartridge.
● Conductivity, current, time and voltage are indicated.
●●

ACILYZER EX3B

Comparison table for detailed specifications
Model
FunctionsIndicators
Effective
membrane area
Electric
conductivearea
Operatingmode
Terminating
mode
Terminating
conditionLine capacity
Standard
processing
capacity
Size
WeightPower
Power
consumption
Uppertemperature
limit

MICRO ACILYZER S3
Desalination, concentration
Current, voltage, desalinated and concentrated solution
conductivity, time, current integration

ACILYZER EX3B
Bipolar membrane electrodialysis
Current, voltage, conductivity in saline solution/acidic
solution/alkaline solution, time, current integration

550cm2550cm255cm2/cell

55cm2/cell

Constant voltage (4 patterns) /constant current

Constant voltage (4 patterns) /constant current

Current, conductivity, time
Current:
Conductivity
・desalinated solution:・concentrated solution:Time：

0.00-3.00Amp
0.0-200mS/cm
0.0-500mS/cm
0-999minutes

150ml

Current, conductivity, time
Current:
Conductivity
・desalinated solution:・acidic solution/
alkaline solution:
Time:
150ml

0.00-6.00Amp
0.0-200mS/cm
0.0-500mS/cm
0-999minutes

500ml/Hr(when usingAC-220-550)(*1)

2,000ml/Hr(*2)

Width: 400mm, Height: 610mm, Depth: 420mm
34kg
AC 100V,single phase 50/60Hz

Width: 400mm, Height: 610mm, Depth: 420mm
35kg
AC 100V,single phase 50/60Hz

Approx. 500W

Approx. 550W

40℃

40℃

(*1) Standard processing capacity indicates 95% desalination that 6% (1N) salt water can be desalinated down to 0.3% (0.05N).
(*2) Standard processing capacity indicates that 7% (1N) sodium sulfate solution can be processed down to 3.5 % (0.5N) through the 3 compartment process.
12Application Examples
Salt production from seawater
Sea
water

Filtration

Electrodialysis

Concentration

Seawater
10.7
0.4
0.4
1.3
19.4
2.6

Concentration
82.0
4.0
0.6
1.4
135.0
0.5

Electrodialysis
Composition (unit)
Na (g/L)
K (g/L)Ca (g/L)
Mg (g/L)Cl (g/L)
SO4 (g/L)

Evaporation

POINT!

・It is possible to make the NaCl concentration 200g/L and more.

Desalination of soy sauce
Electrodialysis
Item (unit)
Desalination rate (%)
Operation time (hour)
NaCl (g/L)
Solution amount (liter)
Nitrogen concentration (g/L)

Feed solution
0
168
100
15.3

32.1
4
124
92
16.1

Desalinated solution
57.1
7
89
81
17.2

75.1
9
59
71
18.0

POINT!

・It desalinates soy sauce without any loss of umami (flavour).
・Salt concentration is adjustable freely.

Desalination of oligosaccharide
Electrodialysis
Item (unit)
Desalination rate (%)
NaCl (g/L)
Lactose (g/L)
Glucose (g/L)

Feed solution
58.50
1.00
1.00

90
5.85
1.00
0.96

Desalinated solution
95
2.92
1.00
0.94

99
0.58
1.00
0.93

POINT!

・It desalinates without losing much saccharide.

Production of gluconic acid
Bipolar Membrane Electrodialysis
Composition (unit)
Sodium gluconate (g/L)
Gluconic acid (g/L)
NaOH (g/L)
Flow rate (L/Hr)
Gluconic acid conversion rate (%)

POINT!

Feed solution
201
0
100

Desalinated solution
13
184
92
94.0

Alkaline solution
100
34
-

・Enable to produce gluconic acid from sodium gluconate at a high conversion rate.
・Enable to produce sodium hydroxide (NaOH) as a byproduct.

13

Centrifugal
separation

SaltDesalination and removal of hardness from underground water
Undergroundwater

Filtration

Electrodialysis reversal
Composition (unit)
Sodium ion (mg/L)
Chloride ion (mg/L)
Total hardness (mg/L)
TDS (mg/L)
SiO2 (mg/L)
Conductivity (μS/cm)
Recovery rate (%)
Desalination rate (%)
Power consumption (KWH/m3)

Electrodialysis

Sterilization

Raw water
236
587
567
1,500
55
2,340

Produced water
42
40
60
180
53
307

Water
distribution

85
88
0.47

POINT!
・Enable to produce drinking water by removing hardness component and salt with low power consumption.
・Enable to treat raw water with high SiO2 concentration and achieve a high recovery rate.

Removal of nitrate nitrogen from underground waterElectrodialysis reversal
Composition (unit)
Nitrate nitrogen (mg/L)
Total hardness (mg/L)
TDS (mg/L)
Conductivity (μS/cm)
Recovery rate (%)
Desalination rate (%)
Nitrate nitrogen removal rate (%)
Power consumption (KWH/m3)

Raw water
45
314
555
770

Produced water
3
70
168
240
80-85
70
93
0.4

POINT!
・Nitrate nitrogen is removed efficiently.

Desalination/concentration of leachate from a landfill
Leachate

Preceding process
Physiochemical treatment,
Biological treatment

Electrodialysis

Concentration

Electrodialysis
Composition (unit)
TDS (mg/L)
Cl (mg/L)
Ca (mg/L)

Feed water
17,0009,300
50Desalination

Evaporation

Salt

Desalinated solution Concentrated solution
350
165,000
200
91,0005450POINT!
・Enable to achieve high level of desalination and high concentration.

14

Application Examples

Desalination/concentration of waste solution
from the manufacturing process of semiconductors

Waste
solution

Electrodialysis

Concentration

Electrodialysis
Item (unit)(NH4)2SO4 (g/L)
Flow rate (m3/day)Feed solution
30.0
1.10

Desalinated solution Concentrated solution
7.6
100.0
0.84
0.26

POINT!
・Enable to reduce waste solution.

Waste solution from pickling process
Waste
solution

R O

ROConcentration

Concentration

Electrodialysis

Electrodialysis
Item (unit)
Na2SO4 (g/L)
NaNO3 (g/L)
Flow rate (m3/day)Feed solution
10.1
4.4
32.0

Desalinated solution Concentrated solution
2.0
141.0
1.9
44.1
30.1
1.9

POINT!
・Enable to reduce waste solution.
・Enable to further concentrate RO (Reverse Osmosis) concentrated solution.

Production of acid and alkali from waste solution with salt
Waste
solutioncontaining
salt

Filtration

Removing
the metallic
hardness

Electrodialysis

AlkaliAcid

Bipolar Membrane Electrodialysis
Item (unit)
Waste solution
150
Na2SO4 (g/L)
H2SO4 (g/L)
NaOH (g/L)
100
Solution amount (m3)
Recovery rate (%)

POINT!

Acid solution
98
99

Alkaline solution
80
99
95

・Enable to produce acid and alkali from waste solution containing salt at a high recovery rate.
・Enable to reduce the amount of waste solution.

15

Desalinated waste solution
10
67

Acid recovery of stainless pickling process
Waste
acid

Filtration

Diffusion
dialysis

Recoveredacid

Pickling
process

Diffusion dialysis
Item (unit)

Waste acid

Recovered acid solution

Deacidified solution

HNO3 (g/L)

150.0

131.0

15.0

HF (g/L)

24.0

14.0

9.9

Fe (g/L)

20.0

1.6

19.0

HNO3 recovery rate (%)

90

HF recovery rate (%)

60

Fe leakage rate (%)

8

POINT!

・Enable to achieve high acid recovery rate.

Acid recovery of aluminum plate pickling process
Waste
acid

Filtration

Electrodialysis

Recoveredacid

Pickling
process

Electrodialysis
Item (unit)

Waste acid

Recovered acid solution

Deacidified solution

H2SO4 (g/L)

175

176

20

Al (g/L)

17.0

1.5

20.2

Acidrecovery rate (%)

91

Al leakage rate (%)

8

POINT!

・Enable to achieve high acid recovery rate.
・Enable to recover acid keeping concentration.

16

Application Examples
Acid recovery of aluminum foil pickling process
Diffusion
dialysis

Waste
acid

Electrodialysis

Deacidified

Recoveredacid

Diffusion dialysis
Item (unit)

Waste acid

Recovered acid solution

Deacidified solution

H2SO4 (g/L)

350

278

70

HCl (g/L)

30

27

3

10

0.3

9

50

48

52

Al (g/L)
3

Solution amount (m )Al leakage rate (%)

Electrodialysis

3

Item (unit)

Deacidfied solution bydiffusion dialysis

Recovered acid solution

Ultimate Deacidified
solution

H2SO4 (g/L)

70

147

7

HCl (g/L)

3

2

1

9

0.6

9

52

23

46

Al (g/L)
3

Solution amount (m )Al leakage rate (%)

3

POINT!

・Enable to achieve high acid recovery rate.

Recovery of alkali waste solution
Electrodialysis
Item (unit)

Alkali waste solution

Recovered alkaline
solution

Dealkalized solution

NaOH (g/L)

40

146

4

Solution amount (L)

1,000

250

880

Alkali recovery rate (%)

POINT!

・A high alkali recovery rate can be accomplished.
・Concentrated alkali recovery can be accomplished.

17

91

Pickling
process

●The contents of this catalogue are effective as of April, 2022.
●Refer the operating manual of each product to use.
●Specifications in this catalogue are subject to change without any notice, and the information in this catalogue is based on test that we believe reliable,

but not guaranteed values.

● Customers are requested to consult with ASTOM prior to any applications different from those described above or diversion of use from original one.

18

ASTOM Corporation
Tokyo Head Office
2-6-2 Nishi-shinbashi, Minato-ku, Tokyo, 105-0003, Japan
Tel: +81-3-3597-5019 Fax: +81-3-3597-5024
Shunan Works
1-1 Mikage-cho, Shunan-shi, Yamaguchi, 745-8648, Japan
Tel: +81-834-34-2333 Fax: +81-834-33-3679
Astom Corporation was established by consolidating the hydrocarbon-based
ion exchange membranes and electrodialysis equipment divisions of two
chemical manufacturing companies, Tokuyama Corporation and Asahi Kasei
Corporation.

2022.10.000