mbr presentation
TRANSCRIPT
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What is MBR ?Combined Technology of Activated Sludge Process and Membrane Separation Process
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MBR Enables High Quality Treated Water, Smaller Footprint & Simple system
<MBR System>
Excess SludgeDeni Nitri
Recycle
Influent ScreenGC
Effluent
Influent
Excess Sludge
<Conventional System>
Sedimentation
Nitri
RAS
Recycle
SF UVDeniScreenGC
Primary Clarifier
Effluent
FineScreen
Comparison with Conventional System
What is MBR?What is MBR?
MLSS: 10000-15000ppm
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Schematic Diagram of MBRCoarse Screen
Balancing Tank
Denitrification Tank
Nitrification Tank
Sludge Storage Tank
Membrane Unit
Fine Screen
Disinfection Tank
Feed Pump
Grit Chamber
Blower
What is MBR?What is MBR?
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Attractive for limited land projects:•Retrofits (increased capacity and/or stricter consent) •Decentralised or Industrial
Comparison of FootprintWhat is MBR?What is MBR?
MBR Conventional
5,600 m3/d, 0.7 ha 6,000 m3/d, 4.5 ha
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Membrane Cartridge
Chlorinated polyethylene
Micro FiltrationPore size : 0.4μm0.5m×1.0m0.8m2/Cartridge
Nozzle
Membrane PanelSpacer
Membrane Sheet
Micro scope
Introduction of typical SMUIntroduction of typical SMU
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Manifold
Membrane case
Tube
Membrane cartridge
Diffuser case
Diffuser
Structure of typical SMUIntroduction of typical SMUIntroduction of typical SMU
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Features of Typical MBR
① Simple system – Less equipment② Energy saving③ Easy operation④ Long Lifetime⑤ World’s market leader
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Membrane Unit
BlowerPermeate tank
M
No backwash pump
No permeate pump
No chemical cleaning tank
Simple piping design
Membrane tank
Sodium HypochloriteDosing Tank
Simple System – Less Equipment -Features of typical MBRFeatures of typical MBR
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Filtration at low pressure is possible.(Typical pressure: 5 – 10 kPa)
Small water head is applicable to collect permeate.
Suction pump is not required. Typical gravity
filtration
Water Head
Simple System – Gravity Filtration -Features of typical MBRFeatures of typical MBR
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■ Cleaning Timing
・ Periodically ( 3 ~ 6 month ) ・ Increase of Trans-membrane Pressure (TMP)
■ Chemical
・ Sodium hypochlorite ( 0.5% ) for organic fouling ・ Oxalic acid ( 1.0% ) for inorganic fouling
■ Chemical Volume : 3L/cartridge ■ Cleaning Duration
Pouring 5min. + cleaning 60 ~120min.
Clean membranes in aeration tanks !
MBR Tank PermeateTank
ChemicalDosing Tank
M
Simple System – In Situ Cleaning -Features of typical MBRFeatures of typical MBR
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Aeration plays two roles forenergy conservation !
1. Membrane Scouring Coarse bubble aeration under
the membrane enables the
membrane surface clean
2. Oxygen supply for biomass This air is also used to transfer
the oxygen into the biomass
Upward airflow among membranes
Energy Saving – Membrane Aeration -Features of typical MBRFeatures of typical MBR
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4% failure in 10 years!% of Membranes Replaced
Age Year
# of PanelUsed inStudy
FailuresExcludingRepairs
Annual %ExcludingRepairs
Cumulative %
ExcludingRepairs
Annual %IncludingRepairs
Cumulative %
IncludingRepairs
1 175796 0 0 0.00 0.00 0.00
2 152696 394 0.26 0.26 0.27 0.27
3 112221 530 0.47 0.73 0.58 0.85
4 79386 669 0.84 1.57 0.91 1.76
5 64486 1388 2.15 3.73 2.34 4.10
6 35636 33 0.09 3.82 0.32 4.42
7 15386 55 0.36 4.18 0.36 4.78
8 4286 20 0.47 4.64 0.47 5.25
9 686 0 0 4.64 0.00 5.25
10 386 0 0 4.64 0.00 5.25
Long LifetimeFeatures of typical MBRFeatures of typical MBR
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Influent Effluent
BOD 312 < 10
SS 228 < 10
NH4-N 35 < 1
NO3-N - < 8
T-N 50 < 10
F.colifoms
- < 2.2 c/100mL
Turbidity - < 2NTU
Peak 78,000m3/d :Flux=0.80m3/m2/d
Ave. 55,000m3/d :Flux=0.56m3/m2/d<Design water quality>
<Design flow rate>
Design Parameters ofReference PlantsReference Plants
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PumpStation
Equalization Tank(4.6hrs)
Fine Screen(1mm bar)
AnoxicTank(3.0hrs)
AerobicTank(3.0hrs)
Coagulant BlowerSodiumHypochlorite
Permeate
RAS(2Q)
ExcessSludge
MembraneUnit
Reuse
System Flow of STPReference PlantsReference Plants
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