Asahi KASEI MICROZA UNA Series User manual

Water Treatment Membrane Module
MICROZATM UNA Series
OPERATING INSTRUCTIONS
Caution
To ensure safe and proper use of the module, carefully read these Operating Instructions and
adhere to all of the safety instructions herein.
Keep the Operating Instructions in a convenient location for consultation.
Asahi Kasei agrees not to assert its own right under its patented invention about method for
use of the membrane module(s) against the end-user of membrane module(s) manufactured by
Asahi Kasei only to the extent necessary to use such module(s).
18Z03K

1
PREFACE
Allow us to begin by expressing our appreciation for your adoption of our MicrozaTM UNA series
module. These Operating Instructions explain the installation of the module and discuss the treatment
and operation precautions to be observed.
To ensure safe and proper use of the module, carefully read and adhere to all of the safety
instructions therein. If you have any questions, please consult Asahi Kasei Corporation ("Asahi
Kasei").
Maintain these operating instructions in a convenient location for consultation.
The UNA series modules are filled with calcium chloride solution. If these preservative solutions are
subject to regulations on chemical substances in your country, please take appropriate procedures on
your own initiative.
Asahi Kasei inspects every Microza module on its own standard and specification, and delivers only
the modules that passed the inspection. However, even though adhering to operating parameters as
outlined in this manual, there remains possibility for housing damage or membrane failure resulting in
a breach, or leakage, between the feed and permeate sides of the membrane. It is therefore strongly
recommended that the user of the module provide adequate detection equipment as described in this
manual and embody quality control protocols and procedures to avoid damage caused by a
membrane failure.
Please ensure that appropriate procedures are enacted to avoid contact with chemicals and leaking
fluids resulting from module housing failure. Asahi Kasei shall not be held liable for consequential
damages or losses caused by such noted membrane failure or by non-adherence of the above noted
recommendations.
UNA SERIES APPLICATIONS
UNA series applications are:
Water purification process
Treatment of boiler condensate water
Tertiary treatment of sewage and wastewater
RO desalination pre-treatment
Iron and manganese removal
* In combination with pre-oxidation by oxidant, such as sodium hypochlorite
Water clarification as an alternative to "sand filtration", "coagulation sedimentation" and/or
"coagulation filtration"
Consult Asahi Kasei:
- If an application is not specifically noted in these Instructions.
- If there is a change in the application or in the system operation after the modules (or system) are
deployed.
Asahi Kasei shall not be held liable for consequential damages or losses caused by such noted
membrane failure or by non-adherence of the above noted recommendations.
UNA SERIES APPLICABILITY
These instructions include some typical applications and operating parameters. Should the application
differ due to variant feeds and/or operating parameters, please first ensure the suitability of the module
prior to use.

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CONTENTS
1. SAFETY INSTRUCTIONS ..................................................................................................................... 4
2. Spec ....................................................................................................................................................... 7
2.1 Module Standard Specification..................................................................................................... 7
2.2 Module and Parts Shipped as Standard ...................................................................................... 8
2.3 Module Connection....................................................................................................................... 9
2.4 Rack Specifications .................................................................................................................... 15
3.MODULE PRECAUTIONS.................................................................................................................... 16
3.1 Notes on Solvents and Chemical Agents................................................................................... 16
3.2 Notes on Feed Water to the Module .......................................................................................... 18
4.MODULE PRECAUTIONS.................................................................................................................... 19
4.1 Module Use Sequence ............................................................................................................... 19
4.2 General ....................................................................................................................................... 19
4.3 Storage & Transportation ........................................................................................................... 25
4.4 Module Disposal ......................................................................................................................... 30
5.MODULE INSTALLATION .................................................................................................................... 31
5.1 Installing Module Parts ............................................................................................................... 31
5.2 Connecting Modules Online ....................................................................................................... 36
6.MODULE REMOVAL ............................................................................................................................ 43
7.STANDARD OPERATING PARAMETERS FOR THE UNA SERIES.................................................. 44
7.1 Standard Operating Parameters ................................................................................................ 46
7.2 Operation Processes .................................................................................................................. 47
2.3.1 List of Module Connection Parts ....................................................................................... 9
2.3.2 Module Connection Types and Required Parts .............................................................. 10
2.3.3 Connection of Module Upper Part ................................................................................... 11
2.3.4 Connection of Module Lower Part, Using Cap A............................................................. 12
2.3.5 Connection of Module Lower Part, Using Cap B............................................................. 13
2.3.6 Connection of Module Side Nozzles ............................................................................... 14
3.2.1 Raw Water to the Module ................................................................................................ 18
3.2.2 Hazardous Materials........................................................................................................ 18
System Cleaning before Test Operation .................................................................................. 19
Locating the System ................................................................................................................. 19
Preservative Solution................................................................................................................ 20
Preservative Solution Flushing Method.................................................................................... 20
Protect from Freezing ............................................................................................................... 26
Avoid UV Light and High Temperature Exposure .................................................................... 26
Avoid Mechanical Impact.......................................................................................................... 26
Avoid Transporting the System with Modules Installed............................................................ 26
System Cleaning before Test Operation .................................................................................. 26
Locating the System ................................................................................................................. 26
Storing the Module and Restarting Operation.......................................................................... 26
5.1.1 End Cap B Attachment .................................................................................................... 32
5.1.2 End Cap A Attachment .................................................................................................... 34
5.2.1 Use of End Cap A for the Feed Water Inlet..................................................................... 38
5.2.2 Use of End cap B at Both Ends....................................................................................... 40

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8. MEMBRANE INTEGRITY TEST AND REPAIR................................................................................... 54
8.1 Pressure Hold Test (PDT) .......................................................................................................... 55
8.2 Air Leak Test............................................................................................................................... 60
8.3 Membrane Leak Repair Method for the UNA Series ................................................................. 64
9.CHEMICAL CLEANING AND STERILIZATION OF UNA SERIES ...................................................... 67
9.1 Chemical Selection..................................................................................................................... 67
9.2 Types of Chemical Cleaning (EFM, CEB, and CIP)................................................................... 69
9.3 Chemical Cleaning Sequences of EFM, CEB, and CIP............................................................. 71
7.2.1 Pretreatment .................................................................................................................... 47
7.2.2 Filtration Process............................................................................................................. 47
7.2.3 Pressure on the Permeate (Treated Water) Side............................................................ 49
7.2.4 Simultaneous Air Scrubbing/Reverse Filtration (AS/BW) ............................................... 50
9.1.1 Contaminants and Applicable Cleaning and/or Disinfecting Agents............................... 67
9.1.2 Acid Selection .................................................................................................................. 68
Cleaning Protocol ..................................................................................................................... 77
Assessing Post Cleaning Permeate Flux Recovery................................................................. 80

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1. SAFETY INSTRUCTIONS
Adhere to the Notes in these Operating Instructions when using the module to ensure correct and
safe operation.
Asahi Kasei shall not be held liable for injuries, losses, or consequential damages caused by
non-adherence to these Operating Instructions.
The Safety Notes and warning labels in these instructions are classified as follows. The meanings
of the Safety Symbols used in these Instructions are also explained.
Warning
Incorrect handling or operation of the module by not adhering to the 'warning' may cause
serious, and possibly, fatal injury and/or damage the module.
Caution
Incorrect handling or operation of the system by not adhering to the 'caution' may cause injury to
personnel and/or damage and loss of equipment.

5
Safety Symbol Legend
There are three types of signals in these Operating Instructions.
WARNING or CAUTION.
NO or DO NOT.
MUST DO.

6
Safety Guidelines
Warning
When handling hazardous chemicals, always wear protectors such as safety goggles
and rubber gloves. The chemicals include, but are not limited to, sodium hypochlorite
and sodium hydroxide. If the solution comes in contact with eyes or skin, immediately
rinse thoroughly with water. Then seek professional medical attention as soon as
possible as there may be serious injury to eyes and skin.
Do not mix sodium hypochlorite and acids when both are used in a cleaning protocol.
Mixing of these chemicals may generate lethal chlorine gas.
Do not use the module for liquids containing an organic solvent as it may cause
cracks in the module housing. Hot water may blast out from such cracks during
operation.
Caution
The membrane is wetted with a 30% calcium chloride solution. Always wear
protectors, such as safety goggles and rubber gloves, to prevent skin contact and eye
contact.
Ensure adequate measures are in place to avoid damage to peripheral units and/or
environmental contamination from exposure to leaking or splashing liquid.
Do not allow the module to come in contact with organic solvents, or solvent vapors,
including cleaning agents which contain organic solvents, or with paints, labels or
tapes with adhesive backings. Failure to observe these precautions could cause
housing cracks.
When installing modules, put a chain round each of them for falling prevention as a
falling module may cause injury or damage to the module. Do not fasten the chains
too tightly as such action may cause module damage. Keep the chains slack as
shown in the following photo. Keep a distance of 5 to 10mm between the module and
the angle bar on which a chain is fixed.

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2. Spec
2.1 Module Standard Specification
Item
UNA-600A
UNA-660A
UNA-620A
Membrane Material
High-bonding network structured polyvinylidene fluoride
Effective membrane area
(outer surface (m2))
23
40
50
Performance
Nominal pore size (micro meter)
0.1
0.1
0.1
Use Conditions
Max. feed pressure (kPa)
300 *1
300 *1
300 *1
Max. TMP (kPa)
300
300
300
Max. Temperature (°C)
40
40
40
pH Range
1 - 10*2
1 - 10 *2
1 - 10 *2
Parts Material
Housing
ABS resin
ABS resin
ABS resin
Potting resin
Polyurethane
Polyurethane
Polyurethane
Gasket, O-ring
EPDM
EPDM
EPDM
Dimensions (mm)
Use of End cap B at both ends
1.314L × φ165
2,018L × φ165
2,418L × φ165
Use of End caps B and A at
upper and lower ends
respectively
1,234L × φ165
1,938L × φ165
2,338L × φ165
Weight (kg)
Filled with water
30
50
60
Without water
15
25
30
*1 Consult Asahi Kasei for system operation under a pressure of up to 400kPa.
*2 See Section 9.1.1 "Contaminants and Applicable Cleaning and/or Disinfecting Agents" for
chemical cleaning.
See Section 7. "STANDARD OPERATING PARAMETERS FOR THE UNA SERIES" for the
details of operating parameters.

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2.2 Module and Parts Shipped as Standard
No.
Description
Qty.
(1)
Blind cap
1
(2)
Gasket
1
(3)
End cap
2
(4)
Protection cap
1
Permeate Outlet
Discharge Outlet
(1) (2)
(3)
Feed Water Inlet
Label
Module Housing
Label indicating retentate outlet
Label indicating feed water inlet
(4)
Alarming Label
(Japanese)
(English)

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2.3 Module Connection
The UNA series modules are connected online at three sections: 1) permeate outlet on top of the
module, 2) feed inlet at the bottom of the module, and 3) discharge outlet side nozzle.
The permeate outlet on top of the module is connected through of a combination of End cap B and an
expansion joint.
The feed inlet at the bottom of the module is connected through of a combination of End cap B and an
expansion joint or a combination of End cap A, a ferrule, and a clamp.
The discharge nozzle on the side of the module is connected through a combination of a union socket
and sold separately a cap nut come with the module.
2.3.1 List of Module Connection Parts
Module Section
Parts to Which to
Connect
Parts through
Which to Connect
Connection Pipe
Diameter
Top of Module
Permeate outlet
End cap B
Expansion joint
50A
Bottom of Module
Feed water inlet
End cap B
Expansion joint
50A
End cap A
Ferrule
2.5S
Module Side
Discharge outlet
Union socket
Cap nut
40A
End cap B
End cap A

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2.3.2 Module Connection Types and Required Parts
The following are the parts to connect the module. The estimated replacement period is based on
operation with a 30-minute filtration cycle. This estimated period depends on the use condition, so
that the period is not guaranteed.
Cap B connection
Parts
O-ring
End cap B
Nut
Expansion Joint
Estimated
replace-
ment
period *3
Consumable
items
Replaced when
its cap is
loosened
5 - 10 years*4
5 - 10 years*4
5 years
Cap A connection
Parts
O-ring
End cap A
Nut
2.5S Sanitary
Gasket
2.5S Clamp
Estimated
replace-
ment
period *3
Consumable
items
Replaced when
its cap is
loosened
5 - 10 years*4
5 - 10 years*4
Consumable
items
Replaced when
its cap is
loosened
5 - 10 years*4
Union socket connection
Parts
Cap nut
Gasket
Union socket
Expansion Joint
Estimated
replace-
ment
period *3
5 - 10 years*4
Consumable
items
Replaced when
its nut is loosened
5 - 10 years*4
5 years
*3 For operation with a 30-minute filtration/backwash cycle
*4 Dependent on the use condition

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2.3.3 Connection of Module Upper Part
The permeate outlet on top of the module is connected to a rack permeate pipe through a
combination of End cap B and an expansion joint.
No.
Parts
Qty.
Remark
(1)
O-ring
1
Sold separately
(2)
End cap B
1
Sold separately
(3)
Nut
1
Sold separately
(4)
Expansion joint
1
Sold separately
(4)
(3)
(2)
(1)

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2.3.4 Connection of Module Lower Part, Using Cap A
The feed water inlet at the bottom of the module is connected to a rack feed pipe through a
combination of End cap A, a ferrule, and a clamp.
No.
Parts
Qty.
Remark
(1)
O-ring
1
Sold separately
(2)
End cap A
1
Sold separately
(3)
Nut
1
Sold separately
(4)
Sanitary gasket
1
Sold separately
(5)
Clamp
1
Sold separately
(2.5S ferrule: Connected to a rack feed pipe)
(1)
(2)
(3)
(4)
(5)

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2.3.5 Connection of Module Lower Part, Using Cap B
The feed water inlet at the bottom of the module is connected to a rack feed pipe through a
combination of End cap B and an expansion joint.
No.
Parts
Qty.
Remark
(1)
O-ring
1
Sold separately
(2)
End cap B
1
Sold separately
(3)
Nut
1
Sold separately
(4)
Expansion joint
1
Sold separately
(3)
(1)
(2)
(4)

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2.3.6 Connection of Module Side Nozzles
The discharge nozzle on the side of the module is connected to a rack discharge pipe through a
union socket.
No.
Parts
Qty.
Remark
(1)
Cap nut
1
Sold separately
(2)
Gasket
1
Standard attachment
(3)
Union socket
1
Sold separately
(1) (3) (2)

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2.4 Rack Specifications
The following figure illustrates a type of rack for which the feed inlet at the bottom of the module is
connected to a rack feed pipe through an expansion joint:
Caution
When installing modules, put a chain round each of them for falling prevention as
a falling module may cause injury or damage to the module. Do not fasten the
chains too tightly as such action may cause module damage. Keep the chains
slack as illustrated in the above figure. Keep a distance of 5 to 10mm between the
module and the angle bar on which a chain is fixed.
Effluent Collection
Header Pipe
Permeate Collection
Header Pipe
Toppling
Prevention
Chain
Air Supply
Pipe
Rack Frame
Feed Water Pipe
Air Supply
Tube

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3.MODULE PRECAUTIONS
3.1 Notes on Solvents and Chemical Agents
As notice on solvents, Asahi Kasei affixes the following warning label to resin module housings:
Chemical resistance characteristics of the ABS housing are as follows:
Precautions
Do not come to contact with the following solvents and/or chemicals or vapors of them to
prevent stress cracking of module housing:
Classification
Typical Examples
Fatty series halogen carbon
hydride
Methylene chloride, Trichloroethylene, Tetrachloroethylene,
Chloroform, etc.
Aromatic series halogen
carbon hydride
Chlorobenzene, etc.
Fatty series amine, Amides
Dimethylformamide (DMF), Dimethylacetamide (DMAC), etc
Cyclic amine, Aromatic
series amine
Pyridine, etc.
Nitriles
Acetonitrile, N-methyl-2-pyrrolidone (NMP), etc
Cyclic ketone
Cyclohexanone
Thinners
Thinners
Esters
Ethyl acetate, Butyl acetate, Diethyl phthalate, etc.
Ethers
Isopropyl Ether, Ethyl ether, etc.
Ketones
Acetone, Methyl ethyl ketone (MEK), etc.
Aromatic series carbon
hydride
Benzol, Toluene, Xylene, etc.
Alcohols
Methanol, Ethanol (high concentration) *5
Fatty series carbon hydride
Hexane, Heptane, Kerosene, Gasoline, etc.
Strong acids, Strong bases
Concentrated nitric acid, Concentrated sulfuric acid, Chromic acid,
Concentrated ammonia, Ethyl amine, etc.
*5 Please consult Asahi Kasei for using a liquid containing ethanol.

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Other Notices
Do not contact module with rubber sheet that contains ester plasticizer or with soft PVC hose.
Trace plasticizer or solvent may cause crack on module housing
Do not wipe off module with solvent wet cloth, or paste PVC tape or gum tape. Do not mark on
the module housing with a felt pen.
Wash module with water and wipe it with dry cloth to remove dust/stain on the module.
Examples of Past Accidents
Paint stuck to a module and the section with the paint cracked.
An adhesive used to fix a heat insulator to a module caused module cracks.
In a case where hot water is fed to modules, soft PVC sheets used as a cushion when
modules are fixed with U-bolts caused module cracks (migration of plasticizer).
Organic solvents may be used depending on their types and concentrations. Consult Asahi Kasei
about solvents or chemical agents other than, or the details of, the above chemicals.
Warning
Do not allow the module to come in contact with organic solvents or solvent vapors,
including chemicals that contain an organic solvent, or with rubber sheets, soft PVC
hoses, PVC tapes, gum tapes with adhesive backings, or with felt pen ink, paints,
adhesives, or cushioning materials. Otherwise, housing cracks may occur and liquid
may spout from such cracks.

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3.2 Notes on Feed Water to the Module
Note the following precautions on feed water for stable operation:
3.2.1 Raw Water to the Module
Raw water to modules refers to a liquid that is pretreated by sand filtration, coagulating
sedimentation, or with activated carbon as required before being passed through strainers installed
upstream of modules.
3.2.2 Hazardous Materials
Do not feed to the module any raw water containing the substances shown in the following table.
Substance
Effect
Activated carbon particle, Diatomaceous earth,
Pigment, Fluidized carrier, Metal powder, Rust,
etc.
These substances are hard, so that they can
damage the membrane, leading to membrane
rupture.
Fibrous substance, Film-like substance,
String-like substance, Wire, String, Straw,
Resin film, Resin fragment, etc.
These substances entwine the membrane,
which defeats the purpose of air scrubbing
inducing membrane clogging.
Large substances such as metal piece, resin
fragment, wood splinter, tree branch, and nut
(>0.5mm)
These substances get stuck in the membrane
bundle, which can damage the membrane
leading to membrane rupture.
Hair, Fiber, Pulp debris, Elastic particles, etc.
These substances entwine the membrane,
which defeats the purpose of air scrubbing
inducing membrane clogging.
Organic solvents such as aromatic compound,
phenol, and alcohol
Organic solvents can cause cracks in module
components such as housing.
Substances that Require Attention
Metals such as iron and manganese, oils, and an excessive amount of coagulant may clog the
membrane. Consult Asahi Kasei if such a substance is expected to enter feed water to the
membrane.

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4.MODULE PRECAUTIONS
Carefully adhere to the Operating Instructions for proper and safe use of the module.
4.1 Module Use Sequence
Operational steps from system commissioning to module replacement is shown graphically below.
4.2 General
System Cleaning before Test Operation
Thoroughly clean the entire system prior to trial operation. Foreign matter, such as metal shards in the
tank or in pipe lines, may seriously damage the membranes. Residual oils may cause membrane
fouling.
Locating the System
Protect the modules from direct sunlight and ultraviolet light as they may degrade and damage plastic
components such as the housing, module head, skirt, and membrane. Please contact us if outdoor use
is intended.
Warning
Protect the modules from direct sunlight and ultraviolet light as they may degrade plastic
components leading to their cracks, from which liquid may spurt.
System
Cleaning
Module Removal
for Replacement
Chemical
Cleaning
Operation
Water Rinsing
Module Installation