Mitsubishi STERAPORE 5700 Series User manual

1st Edition, September 2015 1/58
STERAPORE 5700 Series (FF)
Instruction Manual

STERAPORE 5700 Series (FF) Instruction Manual 2/58
Introduction
This instruction manual describes the outlines, designs, installation, operation,
and maintenance of the STERAPORE 5700 Series (FF).
Please read this manual completely before using this product,
and use the product safely and appropriately.
Keep this manual in a safe place after reading it.
Please confirm the specifications of the products covered by this instruction manual in
[Chapter 10 Specifications].

Table of Contents
STERAPORE 5700 Series (FF) Instruction Manual 3/58
T
Ta ab bl le e o of f C Co on nt te en nt ts s
CHAPTER 1 MBR COMPOSITION AND PLACEMENT...........................................................6
1-1 OVERVIEW OF MBR.............................................................................................................................. 6
1-2 COMPOSITION OF MBR EQUIPMENT ...................................................................................................... 8
1-3 MBR PLACEMENT............................................................................................................................... 10
CHAPTER 2 FILTRATION AND MEMBRANE SCOUR AERATION.......................................12
2-1 FILTRATION......................................................................................................................................... 12
2-2 MEMBRANE SCOUR AERATION DEVICES............................................................................................... 14
2-3 CLEANING THE DIFFUSER.................................................................................................................... 15
CHAPTER 3 CHEMICAL CLEANING.....................................................................................17
3-1 CHEMICAL CLEANING .......................................................................................................................... 17
3-2 CLEANING EQUIPMENT........................................................................................................................ 25
CHAPTER 4 PRETREATMENT..............................................................................................28
4-1 PRETREATMENT.................................................................................................................................. 28
4-2 ACTIVATED SLUDGE............................................................................................................................. 30
4-3 SUPPLEMENTS.................................................................................................................................... 30
CHAPTER 5 TRANSPORT AND INSTALLATION..................................................................31
5-1 TRANSPORT AND INSTALLATION............................................................................................................ 31
5-2 PROCEDURES FOR LIFTING UP MODULES............................................................................................. 37
CHAPTER 6 OPERATION......................................................................................................39
6-1 COMMISSIONING................................................................................................................................. 39
6-2 OPERATION MANAGEMENT .................................................................................................................. 40
6-3 MBR SYSTEM OPERATION .................................................................................................................. 46
CHAPTER 7 TROUBLESHOOTING.......................................................................................48
7-1 TROUBLESHOOTING:EXAMPLES .......................................................................................................... 48
CHAPTER 8 MAINTENANCE ................................................................................................50
8-1 MEMBRANE REPAIR............................................................................................................................. 50
8-2 DIFFUSER CLEANING........................................................................................................................... 51
8-3 PROCEDURE FOR LONG-TERM STORAGE OF USED MODULES................................................................ 52
CHAPTER 9 REFERENCE MATERIALS ...............................................................................53
9-1 GLOSSARY ......................................................................................................................................... 53
9-2 LIST OF CONSUMABLES....................................................................................................................... 55
9-3 CHEMICAL RESISTANCE OF THE PRODUCT............................................................................................ 55
CHAPTER 10 SPECIFICATIONS.............................................................................................56
10-1 ELEMENT SPECIFICATIONS .................................................................................................................. 56
10-2 MODULE SPECIFICATIONS.................................................................................................................... 57

For Safe Use
STERAPORE 5700 Series (FF) Instruction Manual 4/58
F
Fo or r S Sa af fe e U Us se e
This Instruction Manual indicates precautions that must be followed to prevent injury to the user or other
persons, to prevent property damage, and to use the product safely.
These indications and symbols are defined as written below. If you lose or damage this manual, contact the
Membrane Department of the Membrane Division at MITSUBISHI RAYON AQUA SOLUTIONS CO., LTD.
(p.58). You can find contact details on the last page of this manual.
The extent of injuries and damage that will occur if the precautions are ignored and the product is used
incorrectly are indicated as follows.
WARNING
Not following precautions marked with WARNING could lead to death or serious
injury
＊
1.
CAUTION
Not following precautions marked with CAUTION could lead to injury
＊
2or property
damage
＊
3.
＊1Serious injury refers to such things as loss of eyesight, injury, high and low temperature burns (burns that occur
when the skin is exposed to a heating element that is hotter than body temperature for a long period of time,
causing symptoms such as red spots (erythema) and blisters), electric shock, fractures, and/or poisoning,
which leave after effects, or require hospitalization or long term treatment at a hospital as an outpatient.
＊2Injury refers to injuries, burns, electric shocks and so on that do not require hospitalization or long term
treatment at a hospital as an outpatient.
＊3Property damage refers to widespread damage to buildings, household belongings, livestock and/or pets.
Prohibited actions and actions which must be performed are indicated by the following symbols.
These symbols indicate actions that are prohibited.
This symbol indicates actions that must be performed.
Mitsubishi Rayon shall not bear any responsibility for any damage to human lives, property and the like
caused by any systems in which this product is included due to improper use that does not follow this
instruction manual.
This product requires due care and attention when being installed and used. This instruction manual does not
necessarily cover all precautions that need to be followed when installing or using this product.
WARNING
This instruction manual contains descriptions regarding MBR (membrane bioreactor)
treatment of domestic and industrial wastewater, and instructions on using devices. Do not
use it for any other purposes.
Do not drink, or take baths or showers using water directly after it has been treated by this
product.
When handling elements or modules, wear protective clothing and follow construction
company safety standards to prevent industrial accidents.
Be sure to wear protective clothing such as goggles and rubber gloves when handling
chemicals such as sodium hypochlorite (NaClO - used for membrane cleaning) or acid.
If any of these chemicals come into contact with your hands, eyes, or other body parts it may
cause loss of eyesight or chemical burns. In this case, thoroughly rinse the affected part and
consult a doctor.

For Safe Use
STERAPORE 5700 Series (FF) Instruction Manual 5/58
Do not mix sodium hypochlorite (NaClO) and acid under any circumstances. Doing so
releases chlorine gas, which is very dangerous. Be sure to take this into account when
designing the system.
As the modules are very heavy, when using forklifts and cranes make sure that all
apparatus is inspected and certified, and all operators are certified.
CAUTION
Conduct regular inspections and maintenance of the products.
Move modules with care to prevent them from bumping into pipes or other equipment.
When attaching lifting chains or wire ropes to modules, ensure that they are kept taut so
they do not touch the modules.
If the chain or rope touches the upper part of modules, elements will become worn or damaged
due to oscillation caused by aeration.
Use elements with due care to prevent tools, pipes, or other machines from touching the
membrane.
Do not perform construction work that may damage modules, especially membranes, near
the products. Exposure to fire is strictly prohibited.
Sparks from welding or sanding will damage membranes.
Store and transport elements and modules within a temperature range of 5 to 40°C, avoid
direct sunlight, and store them in a dry location.
If elements or modules freeze while they are wet the membrane will be damaged.
Do not treat wastewater which contains organic solvents and/or chemicals that can swell,
damage, or degrade the products.
It causes deformation, damage and malfunction.
Dispose of elements and modules as industrial waste in accordance with laws and local
ordinances.
If there is a danger of chemical leaks that may damage nearby equipment and cause
environmental pollution, be sure to take all necessary measures to prevent chemicals from
splashing or spilling.

Chapter 1 MBR Composition and Placement
STERAPORE 5700 Series (FF) Instruction Manual 6/58
C
Ch ha ap pt te er r 1 1 M MB BR R C Co om mp po os si it ti io on n a an nd d P Pl la ac ce em me en nt t
STERAPORE 5700 Series (FF) hollow fiber membrane modules are submerged membrane modules used for
MBR (membrane bioreactor) wastewater treatment. Install the products in a membrane tank and use them for
solid-liquid separation.
1-1 Overview of MBR
In conventional activated sludge processing, solid-liquid separation is performed in a settling tank. However,
in the MBR system it is performed in a membrane module. Consequently, a settling tank for sludge settling is
not required in MBR systems, a high MLSS (mixed liquor suspended solids) concentration can be maintained,
and 100% separation of SS (suspended solids) larger than the membrane pore diameter is possible.
Figure 1-1 shows a schematic diagram of conventional activated sludge processing and MBR.
Figure 1-1 Schematic Diagram of Conventional Activated Sludge Processing and MBR
The differences between the MBR process and the conventional activated sludge process, and the
advantages of MBR are as follows.
As the membrane pore diameter is smaller than bacteria (e.g. colon bacillus), clear, safe treated water can
be obtained. Treated water can be re-used as greywater, or used as raw water for RO (reverse osmosis)
membrane system treatment.
MBR systems are simple and compact, as a final sedimentation tank is not required.
As there is no need to allow sludge to settle, the MLSS concentration level in the aeration tank stays high,
ranging from around 5,000 to 15,000 mg/L. Consequently, the aeration tank is compact.
When inorganic coagulant addition is used for dephosphorization, the phosphate elimination rate can be
significantly improved.

Chapter 1 MBR Composition and Placement
STERAPORE 5700 Series (FF) Instruction Manual 7/58
There are two types of MBR system.
Integrated MBR systems which place membrane modules in aeration tanks.
Separate MBR systems which place membrane modules in separate membrane tanks.
Figure 1-2 shows schematic diagrams for both.
Figure 1-2 Schematic Diagrams of the Integrated MBR System and Separate MBR System

Chapter 1 MBR Composition and Placement
STERAPORE 5700 Series (FF) Instruction Manual 8/58
1-2 Composition of MBR Equipment
The MBR system is composed of various components, including membrane modules, chemical cleaning
equipment, permeate pumps, blowers, etc.
Figure 1-3 shows an example schematic diagram of an MBR system.
Figure 1-3 Schematic Diagram of an MBR System (Example)
1-2-1 Roles of Main Components
and Tanks in the MBR System
①Flow equalization tank
As the MBR system is fundamentally operated at a constant flux, a flow equalization tank is installed to
mitigate fluctuations in the flow rate. The size of the flow equalization tank differs according to the raw
water flow rate and flow rate fluctuations, the treatment capacity of the membrane separation device,
etc.
②Aeration tank
There are two types of MBR system: integrated MBR systems and separate MBR systems. (See: p.6
“1-1 Overview of MBR”). Additional aeration tanks are required if the biological processing is not
completed in the membrane tank. Circulation pumps are then required to control sludge concentration
in the reactor and membrane tanks. If a process such as recycled nitrification is used, multiple aeration
tanks are required.
③Membrane tank
The tank in which modules are submerged is called a membrane tank.
In integrated MBR systems, the membrane tank also serves as an aeration tank.
As the membrane tank has the highest sludge concentration of all the tanks, it is effective to extract

Chapter 1 MBR Composition and Placement
STERAPORE 5700 Series (FF) Instruction Manual 9/58
excess sludge from this tank.
④Treated water tank
This is a tank used to store treated water. It sometimes serves as a dilution water tank. When
necessary, sodium hypochlorite is added to the water in this tank to disinfect it before it is discharged.
⑤Chemical tank
This is a tank used to store undiluted NaClO used to clean modules. As high temperatures accelerate
the decomposition of NaClO, which produces chlorine, install the tank in a well-ventilated location that
is not exposed to direct sunlight.
⑥Dilution water tank
This is a tank used to store water for diluting undiluted NaClO. Water that can be stored in this tank
includes public water such as city water, or treated water.
⑦Permeate pump
This is a pump used to draw treated water out of the membrane module. A self-suction pump is
normally used for this purpose. It is possible to use an ejector, vacuum pump or other equipment that
removes air from pipes instead of a self-suction pump. Permeate pumps are operated at a constant
flow by installing a constant flow valve on the discharge side or controlling it using an inverter.
⑧Return activated sludge pump (RAS pump)
The RAS pump is required to adjust the sludge concentration of the reactor and membrane tanks.
When using recycled nitrification, the pump also circulates nitrified water. The circulation volume is
determined primarily by the balance between the sludge concentrations in the reactor and membrane
tanks and the target nitrogen removal rate. It is generally about 1 to 3 times the volume of raw water.
⑨Chemical pump
This is a pump used to deliver a constant flow of NaClO from the chemical tank.
⑩Dilution water pump
This is a pump used to send water used to dilute NaClO from the dilution water tank. A metering pump
or constant flow valve is used to send a constant flow of dilution water.
⑪Aeration tank blower
This is a blower used to supply air for biological processing to the aeration tank. Select a blower model
based on the volume of oxygen required for biological processing, water depth, pipe diffuser properties
and so on.
⑫Membrane scour blower
This is a blower used to supply air used to clean modules. The blower model should be chosen
according to water depth, the air volume required for cleaning a modules (See p.エラー! ブックマーク
が定義されていません。 “エラー! 参照元が見つかりません。 エラー! 参照元が見つかりません。”),
etc. If the same blower is used for both biological processing and membrane scour aeration, control the
volume of membrane scouring air so it remains constant at the designated value.

Chapter 1 MBR Composition and Placement
STERAPORE 5700 Series (FF) Instruction Manual 10/58
1-3 MBR Placement
This section describes module layout in the membrane tank and required water depth.
CAUTION
When using this product, ensure that all of the installation requirements below are met. If these
requirements are not met, the product will not function as indicated in the specifications, and/or may
deteriorate or become damaged.
Integrated MBR systems require membrane tanks with a capacity that ensures the HRT (hydraulic
retention time) required for biological processing.
The diffusers are used for biological processing, membrane scouring and in-tank mixing. Make sure
that the diffuser equipment (blower, pipe diffuser, etc.) is suitable for all of these uses.
Place the inlet for raw water as far as possible from modules to prevent undecomposed raw water from
coming into direct contact with modules. Otherwise the undecomposed parts of raw water can cause
coating and fouling of the membrane which increase the rate of clogging, resulting in unstable
operation.
1-3-1Module Layout
When placing modules in a membrane tank, it is necessary to maintain enough space for sludge moved
upward through the modules by aeration to move downward.
Maintain the following depthwise center-to-center clearance. (See Figure 1-4)
For modules using 57E0005SM elements: 1.0 m or greater (distance to the wall: 0.5 m or greater)
Maintain enough widthwise clearance for pipe placement etc.
CAUTION
A lack of sufficient clearance will prevent stable operation.
Figure 1-4 Module Layout
Widthwise
Depthwise