Zenon Membrane Applications for Wastewater Re-use in the ...sawea.org/pdf/EnviroArabia2007/Zenon...

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Membrane Applications for Wastewater Re- i th Middl E t use in the Middle East Enviro Arabia 2007 Ch i J ff Chris Jeffery

Transcript of Zenon Membrane Applications for Wastewater Re-use in the ...sawea.org/pdf/EnviroArabia2007/Zenon...

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Membrane Applications for Wastewater Re-i th Middl E tuse in the Middle East

Enviro Arabia 2007Ch i J ffChris Jeffery

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Presentation Outline

®• ZeeWeed® UF Technology & Products• ZENON MBRZENON MBR• Regional MBR Drivers• Overview of MBR Developments• Regional Case StudiesRegional Case Studies

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UF TechnologyUF TechnologyUF TechnologyUF Technology

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How Membranes WorkHow Membranes Work

• Membrane fibers have billions of microscopic

th fpores on the surface• The pores form a

b i t i itibarrier to impurities, while allowing pure water molecules towater molecules to pass

• Water is drawn through

Electron microscope view of membrane

surface• Water is drawn through the pores using a gentle suction ZeeWeed® Membrane Fibers

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suction

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Membranes for Water Treatment

Conventional Pretreatment0.04 μm

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ZeeWeed® Products

ZeeWeed® 1000Membrane Filter Media™

ZeeWeed® 500dReinforced Membranes™

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Membrane Filter MediaReinforced Membranes

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ZeeWeed® Hollow Fibre MembranesZeeWeed Hollow Fibre MembranesZeeWeed®® 500

Diameter (1.9/0.8 mm), ZeeWeed®® 1000

Diameter (0.8/0.47 mm), Extremely solids tolerant High packing density

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ZeeWeed® 500d Module

Fibers Potting Header

Modules are composed of thousands of membrane fib

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fibers

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ZW 500 Membrane System

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ZW 1000 Membrane System

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Principles of ZeeWeedPrinciples of ZeeWeed®®

I d M bI d M bImmersed MembranesImmersed Membranes

ZeeWeedZeeWeed®® 500 500 Flow DiagramFlow Diagram

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Wastewater Treatment

For Water Reuse

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MBR or TertiaryMBR or TertiaryMBR or TertiaryMBR or Tertiary

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Tertiary Filtration vs. MBRTertiary Filtration vs. MBRal

nven

tiona

Aeration Secondary Sand filter

InfluentEffluentto discharge

Co basin

yclarifier

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Tertiary Filtration vs. MBRTertiary Filtration vs. MBRal

nven

tiona

Aeration Secondary Sand filter

InfluentEffluentto discharge

Co basin

yclarifier

n High quality

Terti

ary

Filtr

atio

n

Aeration basin

Secondaryclarifier

Membranefiltration

InfluentHigh qualityeffluent toreuse or RO feed

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Tertiary Filtration vs. MBRTertiary Filtration vs. MBRal

nven

tiona

Aeration Secondary Sand filter

InfluentEffluentto discharge

Co basin

yclarifier

n High quality

Terti

ary

Filtr

atio

n

Aeration basin

Secondaryclarifier

Membranefiltration

InfluentHigh qualityeffluent toreuse orRO feed

rane

ac

tor

InfluentHigh qualityeffluent to

Mem

bB

iore

a

Aeration basin

Membranefiltration

effluent toreuse orRO feed

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Membrane Bioreactor (MBR)

For Water Reuse

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Membrane Bioreactor (MBR)

ActivatedSludge MembraneMBRSludgeProcess Filtration

MBR

Stable Biological Absolute SolidsS ti

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Treatment Process Separation

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A Basic MBR Production Train

1.Biological reactor1.Biological reactor

2.Membranes

3.Permeate pump &5 3.Permeate pump &

air blower

4. Control panel

15

4. Control panel

5. Permeate & air

pipingpiping2

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Overall ZeeWeed® MBR Design

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Regional MBR DriversRegional MBR Drivers

• Effluent Quality• Effluent Quality• Reduced Plant Footprint & Lower

Civil CostsCivil Costs• High Cost of Alternative Water

SSources• Process Advantages:g

– complete control of sludge age– does not depend on sludgedoes not depend on sludge

settling characteristics

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Advantages of UF membranesHi h lit ffl tHigh-quality effluent

Effluent Parameters Typical Values Achievable Levels

BODBOD5 < 2 mg/L Typically n.d.

TSS < 2 mg/L Typically n.d.

NH4 - N < 1 mg/L < 0.5 mg/L

TN < 10 mg/L < 3 mg/L

TP < 0.3 mg/L < 0.1 mg/L

Turbidity < 0.3 NTU < 0.1 NTU

… and physically disinfected!

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Advantages of UF membranesCompliance with global standardsUF t i li ithUF permeate in compliance with:

WHO standards for unlimited irrigationirrigation

International Maritime Organization bacteriological limits

EU bathing Water Directive

California Title 22 Code of RegulationsRegulations

UF: the best approach to meet the tightest effluent quality requirementsg q y q

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California Title 22, Chapter 4 Compliance with global standards

The most stringent standards for wastewater reuse across the U.S. (and possibly the world)Regulations adopted in 1978 by CDHS (California Department of Health Services)• Recycled water quality standards

Reliability & redundancy of recycled water treatment plants• Reliability & redundancy of recycled water treatment plants• Tertiary treatment + disinfection Standards• Strategy favoring the beneficial reuse of water to the maximum extent practicalgy g p• Bacteriological standards based on the expected degree of public contact with recycled water

Average Maximum Tolerance

T bidit (NTU) < 2 < 10 < 5 (5% f ti i 24 h i d)Turbidity (NTU) < 2 < 10 < 5 (5% of time in any 24 hr period)

Total coliforms (ufc/100 mL) < 2.2 < 240 < 23 in any 30 day periodFecal coliforms (ufc/100 mL) 0 0 0

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Key MBR Driver - ReducedKey MBR Driver Reduced Footprint

TRAIN “A” TRAIN “C”

TRAIN “B”

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Costs of Producing Water from SecondaryCosts of Producing Water from Secondary

Component Units A: from B: from Ratio

Effluent and from SeawaterEffluent and from SeawaterComponent Units A: from

CAS effluent

B: from seawater

Ratio (B/A)

Capital costsInfrastructure & pretreatment

$/m3/d 161 320 1.99& pretreatmentRO $/m3/d 321 624 1.94Total $/m3/d 482 944 1.96Total $ 482 944 1.96Total Life cycle costsCapital $/m3 0.07 0.24 3.43pO&M $/m3 0.21 0.38 1.81

Total $/m3 0.28 0.62 2.2126 /

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Total 0.28 0.62 2.21

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Developments In MBRDevelopments In MBRDevelopments In MBRDevelopments In MBR

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Total Capital CostsTotal Capital CostsTotal Capital CostsTotal Capital Costs2,500

2,000

m3 /d

)

1,500

al c

osts

($/m

1,000

Tot

al c

apita

CAS500

CASMBRCAS-TF

00 10,000 20,000 30,000 40,000 50,000 60,000 70,000 80,000

Flow rate, m3/d

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Total O&M CostsTotal O&M Costs0.30

0.25

m3 )

0.15

0.20

M c

osts

($/m

0.10

0.15

otal

O&

M

0.05

To

CASMBRCAS-TF

0.000 10,000 20,000 30,000 40,000 50,000 60,000 70,000 80,000

3

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Flow rate, m3/d

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Total LifeTotal Life--Cycle CostsCycle Costs0.50

0 35

0.40

0.45

/m3 )

0.25

0.30

0.35

cle

cost

s ($

0.15

0.20

0.25

tal l

ife c

yc

CAS

0.05

0.10To CASMBRCAS-TF

0.000 10,000 20,000 30,000 40,000 50,000 60,000 70,000 80,000

Flow rate m3/d30 /

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Flow rate, m /d

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Capital CostCapital CostCapital Cost Capital Cost DevelopmentsDevelopmentspp

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ZeeWeedZeeWeed®® 500 500 Cassette EvolutionCassette Evolution

ZW-145 ZW-500aZW-150 ZW-500c ZW-500dZW-145 ZW-500a

1993 2003

ZW-150 ZW-500c ZW-500d

1993 2003

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Operational CostOperational CostOperational Cost Operational Cost DevelopmentsDevelopmentspp

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MBR Energy Usersgy

Anoxic RAS Flow Permeate Mixers Flow

Biological Process Aeration

Membrane Aeration

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Aeration Aeration

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MBR Energy UsersgyMisc1%

RAS P i

Permeate Pumping4%

1%Anoxic Mixing

9%

RAS Pumping10%

Bio Process Aeration42%

Membrane Aeration34%

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Reduction of Aeration EnergyReduction of Aeration Energy

• Effect of MLSS - Optimize Footprint & EnergyFootprint & Energy

• Reduction of Membrane Air Scour Power Cyclic AerationPower – Cyclic Aeration

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Effect of MLSS on Alpha Factor

1

0.7

0.8

0.9

0.5

0.6

0.7

Alph

a

0.2

0.3

0.4

0

0.1

0 5 10 15 20 25 30 35 40 45 50 55

MLSS, g/L

Fine Pore Coarse Bubble (Derived) Mechanical (Rotors)

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Reference: Bratby, John R. et al, Bratby, John R. et al, Merits of Alternative MBR Systems,Merits of Alternative MBR Systems, WEFTEC WEFTEC 20022002..

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Optimizing Energy EfficiencyBiological process aeration

Select MLSS to optimize OTE• Select MLSS to optimize OTE– Alpha factor decreases at higher MLSS– Limitation on OUR at higher MLSS

• Fine bubble aeration in bioreactorFine bubble aeration in bioreactor

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Bio-Process NPV vs. MLSS Concentration

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Bio-Process NPV vs. MLSS Concentration

Design

TRAIN “A” TRAIN “C”

TRAIN “B”

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Membrane Aeration

• Optimize membrane submergence toOptimize membrane submergence to reduce blower discharge pressure

• Effective scouring with course bubbleEffective scouring with course bubble aeration

• Optimized cyclic aeration based on flowOptimized cyclic aeration based on flow

Membrane unit #1Blower

Membrane unit #2Membrane unit #2

Blower running continuously Fast action

butterfly valves

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y

US Patent 6,245,239

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10/30 Aeration at ADF10/30 Aeration at ADF

• Optimized cyclic aeration based on flowp y

• Maintain 10/10 Aeration at or above ADF

• Run at 10/30 Aeration below ADF

50% S i d 10/10 7 10%• 50% Savings compared to 10/10 = 7-10% LCC

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10/10 Sequential Aeration

• 4 blowers on

• each blower sized to aerate ½ of one train

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Note – Airflow is blue

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10/30 Sequential Aeration

• 2 blowers on

• each blower sized to aerate ½ of one train

• same instantaneous air• same instantaneous air flow rate as 10/10 BUT ½ the average

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Note – Airflow is blue

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Main Reference Plants in theMain Reference Plants in the Middle East

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List of Main Plants

• Buraida Upgrade KSA (Fe/Mn Filtration)• Buraida Upgrade, KSA (Fe/Mn Filtration)

• Jeddah Industrial City, KSA (Tertiary y, ( yTreatment)

D h W t Q t (T ti T t t)• Doha West, Qatar (Tertiary Treatment)

• Lusail Qatar (MBR)Lusail, Qatar (MBR)

• Dubai Sports City, UAE (MBR)

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Buraida Upgrading Qassim KSABuraida Upgrading, Qassim, KSAWater Treatment Plant• Capacity

100 000 3/d (26 4 MGD) Ulti t- 100,000 m3/day (26.4 MGD) Ultimate Capacity

- 85,000 m3/day (22.5 MGD) Initial Capacity

Plant is designed for Iron/Manganese & RadiumPlant is designed for Iron/Manganese & Radium Removal for RO Pre-treatment

• Effluent Quality:• Effluent Quality:• Turbidity < 0.1- 0.3 NTU -SDI < 2-3

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Buraida Upgrading-Cont’dBuraida Upgrading-Cont d

S t C fi tiSystem Configuration:• Seven trains each with seven ZW 1000 V3

Cassettes• Total number of elements Initial: 2,142;

Ultimate 2,499• End User: Qassim Water Authority y• Expected Commissioning Date: June 2007

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Jeddah Industrial City KSA -Jeddah Industrial City, KSA -Tertiary Treatment• Capacity

14 640 3/d (3 86 MGD)- 14,640 m3/day (3.86 MGD)

• Feed Water Quality:y

- BOD/TSS 10/10 mg/l Turbidity 2-3 NTUEffl t Q lit• Effluent Quality:- Turbidity < 0.2 – 0.5 NTU -SDI < 3.0y

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J dd h I d t i l Cit C t’dJeddah Industrial City, Cont’d..

• System Configuration:• Three (3) Membrane Trains Two (2)• Three (3) Membrane Trains, Two (2)

Cassettes in Each Train E h C tt h 51 Z W d 1000 V3• Each Cassette has 51 Zee Weed 1000 V3 ElementsI ti i J 2006• In operation since January 2006

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DOHA WEST-Doha, QatarTertiary Treatment

CapacityCapacity - 135,000 m3/day (35.7 MGD)

Feed Water Quality :- TSS 5-10 mg/l (Weekly Max)TSS 5 10 mg/l (Weekly Max)

Effluent Quality:• Turbidity < 0 1 0 5 NTU• Turbidity < 0.1 – 0.5 NTU• Nematode Eggs >4 Log Removal

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DOHA WEST Cont’dDOHA WEST, Cont d…

• System Configuration:• System Configuration:

- Seven (7) Membrane Trains, Six (6) Cassettes per Train

- Total number of Membranes is 3,528

- Inst. Design Flux: 45 lmh (N Mode), 53.6 lmh (N-1 Mode)

• UF Effluent is used for Irrigation

• End User: PWA-Drainage DptEnd User: PWA Drainage Dpt.

• Expected Commissioning Date: December 2007

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LUSAIL MBR System Doha, Qatar

(Ultimate) Design Flow• (Ultimate) Design Flow• 61,300 m³/d wastewater flow

• Feed Water Quality:

Sanitary Waste- Sanitary Waste • Effluent Quality:

• Irrigation Water Quality

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Lusail MBR System, Cont‘d...

Bioreactor• 4 (four) bioreactors @ 3250 m³ each (for final

stage)Membrane Tanks

• Staged expansion of plant with 3/4/7/8Staged expansion of plant with 3/4/7/8 membrane trains

• Each train equipped with 5 (five) ZeeWeed q pp ( )500d trains, using 64 Element Cassettes

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LUSAIL Cont’dLUSAIL, Cont d…

System Configuration (Phase 4)• System Configuration (Phase 4)- Eight (8) Membrane Trains, Five (5) Cassettes per Train

T t l b f M b i 2 456- Total number of Membranes is 2,456- Net design flux: 32.9 lmh (N Mode), 37.6 lmh(N-1 Mode)UF Effl t i d f I i ti• UF Effluent is used for Irrigation

• End User: Qatari Diyar Real StateE d C i i i D D b 200 (Ph• Expected Commissioning Date: December 2007 (Phase 1)

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Dubai Sports City STPp yADF: 25,000 m3/d Commission Date: Expected Jan 2008

Partnership with local contractorMDF is 30,000 m3/dPhased approach with 2/3 it i t ll d2/3 capacity installed6 trains at buildoutEffluent used as TSE for irrigationEvaluated Bid

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Thank You!............. Questions?

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