Chapter 1 Mbr Composition And Placement; Overview Of Mbr - Mitsubishi STERAPORE 5600 FF Series Instruction Manual

Chapter 1
STERAPORE 5600 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.
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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 10,000 mg/L. Consequently, the aeration tank is compact.
 When inorganic coagulant addition is used for dephosphorization, the phosphate elimination rate can be
significantly improved.
STERAPORE 5600 Series (FF) Instruction Manual
MBR Composition and Placement

Chapter 1 MBR Composition and Placement

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