2. Membrane Bioreactor (MBR) application/pdf...Technology evaluation of MBR 2003.11 1st 2nd JS...
Transcript of 2. Membrane Bioreactor (MBR) application/pdf...Technology evaluation of MBR 2003.11 1st 2nd JS...
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2. Membrane Bioreactor (MBR)
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Copyright (c) 2012 Japan Sewage Works Agency All rights reserved.
Membrane Bioreactor (MBR) Bioreactor (MBR)
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A combination of biological WWT (e.g. activatedsludge) and membrane filtration as a measure for solid-liquid separation.
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Copyright (c) 2012 Japan Sewage Works Agency All rights reserved.
Image of Membrane Filtration on MBRFiltration on MBR
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Filtrate
Stream of bubble and activated sludge
MembraneActivatedsludge
Air bubblesFor washing
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Membrane and Removable Materialsand Removable Materials
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Reverse Osmosis (RO)
Nanofirtration (NF)
Ultrafiltration (UF)
Microfiltration (MF)
Sand filtration
Allegra
Virus
Pore size (μm)1 1010-110-210-310-4
Membrane
Removable materialsProtozoa
Organic matters
Odor materials Bacteria
Anion surfactant
Humic acid
Ion
0.1~0.4μmMBR
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Copyright (c) 2012 Japan Sewage Works Agency All rights reserved.
Membrane Type used for MBR
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Flat sheetFlat sheet Hollow FiberHollow Fiber Ceramic
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Advantages of MBR over Conventional Activated Sludge Process
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- Complete rejection of suspended solids.- Higher mixed liquor suspended solids (MLSS) (>8 g/L).- Smaller footprint (< 6hr for biological nutrient removal).- Smaller sludge production.- Simple monitoring parameters (e.g. transmembrane
pressure (TMP) ).
Conventional activated sludge process MBR process
Fine screen Membrane
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Various Evaluation of MBR technology
MBR is a core technology for simultaneous dissolving current issues on sewage works in Japan and other countries due to its excellent characteristics
MBR
Small-scaleplants
Disasterrecovery
Large-scaleplants
Reclamationof effluent
Retrofitting
Advancedtreatment
Overseasdeployment
Riskreduction
•Excellent and stable effluent quality•Bacteria free effluent •Nitrogen and phosphorus removal•Small footprint•Easy operation
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Developments of MBR in Japan Sewage Works Agency
10 11 1398 99 00 01 02 03 04 05 06 07 08 09 14
■ Number of MBR in operation at the end of fiscal year
12 13 14
1st phase 2nd phase 3rd phase
Basicfactors
Reduction of operation costs
Large-scaleapplication
Application to combinedsystem and/or more
energy-saving
4th phase
■ Technology evaluation of MBR★★
2003.111st 2nd
★★■ JS Design guideline of MBR
★2003.4 2005.41st edition Revised edition
■ Pilot-scale studies
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9 10 1115
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Stared operation of the first MBR(Fukuzaki WWTP, 2,100m3/d)
★★2005.3
★★2011.3
Stared operation of the largest MBR(Sanbou WWTP, 60,000m3/d)
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Copyright (c) 2012 Japan Sewage Works Agency All rights reserved.
Example of MBR Facilities in Japan
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Fukuzaki WWTP-Present treatment capacity 4,200m3/d( entire capacity 12,500m3/d)
-The first MBR installation for Japanese sewage plant
Fukuzaki WWTP-Present treatment capacity 4,200m3/d( entire capacity 12,500m3/d)
-The first MBR installation for Japanese sewage plant
Sanbo WWTP-Treatment capacity:60,000m3/d-The largest MBR in Japan-First application to retrofitting of existingfacility and combined sewer system inJapan
Sanbo WWTP-Treatment capacity:60,000m3/d-The largest MBR in Japan-First application to retrofitting of existingfacility and combined sewer system inJapan
Aeration tank
Primary Settling tank
Fine Screen
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Development of large-scale MBR on the 3rd phase pilot-scale studies
A variety of system configuration was developed to fit to restrictions of existing facilities and requirements of upgrade.
A
B
C
D
Membranetype
Hollow fiber
Ceramic
Flat sheet
Flat sheet
SubmergedSeparate
External
SubmergedIntegrated
SubmergedSeparate
Biologicaltreatmentprocess
A2O
A2O
UCT
UCT
MBRsystem Others
Combined with RO for reclamation
Gravity filtrationLarge-size membrane
Gravity filtrationNH4-N controlCombined with RO
A
B
C D
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Process Flow of UCT-MBR Process
M
PI F
P
M
P
Anaerobic tankHRT=1hr
Anoxic tankHRT=2hr
Aerobic tankHRT=3.2hr
FM
P
Excess sludge
Permeate
Chemical
PAnaerobicTank mixer
Anoxic tankmixer
Nitrified liquor Airlift pump
Auxiliary aerationblower
B B
Membrane air scour blower
Chemical dilution tank Chemical tank
Syphonfiltration
Membraneunit
diffuser
Excess sludge pump
Raw water or Primary effluent
Denitrified liquor Airlift pump
①Large-size membrane unit
④Vertical axis mixer ②Syphon filtration system
③MLSS recirculation with airlift pump
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Treatment Efficiency in UCT-MBR Process
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1
2
3
4
5
6
6/1 7/1 8/1 9/1 10/1 11/1 12/1 1/1 2/1 3/3 4/3
T-P
(m
g/L) Influent
Permeate
Design influent 4.25mg/L
Design effluent 0.66mg/L
0255075
100125150175200
6/1 7/1 8/1 9/1 10/1 11/1 12/1 1/1 2/1 3/3 4/3In
fluent
BO
D(m
g/L)
0246810121416
Perm
eate
BO
D(m
g/L)
Influent
permeateDesign influent 120mg/L
Design effluent 3mg/L
influenteffluent
0
10
20
30
40
6/1 7/1 8/1 9/1 10/1 11/1 12/1 1/1 2/1 3/3 4/3
T-N
(m
g/L)
Influent
Permeate
Design influent 31.5mg/L
Design effluent 7mg/L
Biological Oxygen Demand (BOD)
Total Nitrogen (T-N)
Total Phosphorus (T-P)
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Energy Saving Efficiency in UCT-MBR Process
0 0.2 0.4 0.6 0.8 1
電力量試算値(kWh/m3)
省エネMBR
従来MBR
膜洗浄用送風機 補助散気用送風機 膜ろ過ポンプ
循環ポンプ 攪拌機
0.91kWh/m3
0.48kWh/m3
Conven-tional MBR
UCT-MBR
Trial calculation of energy consumption
Permeate pumpTank mixingAuxiliary aerationMembrane cleaning
MLSS recirculation
●large-size membrane unit●siphon filtration●airlift pump●vertical axis mixer
47% reduction