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Energy as Motor of Seawater Reverse Osmosis Desalination Development
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Energy as Motor of Seawater Reverse Osmosis Desalination Development

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WEX 2012 The Water and Energy Exchange - ...

WEX 2012 The Water and Energy Exchange -
31st January – 2nd February 2012 – Lisbon

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  • 1. WEX 2012 The Water and Energy Exchange 31st January – 2nd February 2012 – Lisbon Energy as Motor of Seawater Reverse Osmosis Desalination DevelopmentMiguel Angel SANZDegrémont 1
  • 2. Reverse Osmosis:Treatments and Energy Recovery Pressure Recovery, Y Brackish water 8 - 35 bar Brackish water 60 - 90 % Seawater 50 - 80 bar Seawater 35 - 55 % Raw Water HP Pump Membranes Permeate Pretreatment M Postreatment Reject Reject Energy RecoveryEnergy Consumption= f(TDS, Y, Tª,Membranes, ρMH) 2
  • 3. Cost of Desalinated Water 2/3 of the Operating Cost Amortization Energy 33 - 43% 37 - 43% Maintenance 3,5 -4,5% Staff RO Cleaning 4 - 11% 0,2 - 0,3% Chemicals Membranes 2 - 6,5% 2 - 5% 3
  • 4. TRENDS & FUTURE Historical Evolution of Energy Consumption in SWRO 10.00 1st RO pass Consumption Total Consumption 9.00 8.00 7.00 6.00 kW.h/m3 5.00 4.00 3.00 2.00 ? 1.00 0.00 Years 1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 2020Year 1972 1983 1987 1992 1997 1999 2002 2003 2006 2009 2012Plant Ouat I. Lanzarote ICosta Teguise- Pajara- Fue. Telde- GC Bahia de Palma Carboneras Fujairah Perth Llobregat MelbourneSite France Canary I.-SP Canary I.-SP Canary I.-SPCanary I-SP Balearic I.-SP Almería-SP EAU W. Australia Barcelona Victoria-AUSProduction (m3/day) 70 400 2000 2500 15000 68000 120000 170500 143700 200000 445000TDS (mg/l) 37500 37500 37500 37500 37500 39500 39500 39000 36500 39500 36500Energy Recovery No ERD. TP Guinard TP Rev.P. TP Pelton TP Pelton TP Pelton TP Pelton TP Pelton ERI ERI ERIRack size (m3/day) 70 400 1000 2500 5000 7500 10000 11500 14500 21000 21500RO Passes 1 1 1 1 1 1 1 2 (85%) 2 (100%) 2 (20%) 2 (100%) 4
  • 5. NEXT FUTURE Still a small reduction in specific energy Historical Evolution of Energy Consumption in SWRO 10.00 1st RO pass Consumption Total Consumption 9.00 8.00 7.00 6.00kW.h/m3 5.00 4.00 3.00 - 20% 2.00 1.75-1.50 1.00 0.00 1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 2020 Years Theoretical Limit for TDS of 36000 a 39500 mg/l (100% efficiency and Osmotic Pressure)Energy Consumption= f(TDS, Y, Tª, Membranes, Pretreat., ρMH,) Miguel Ángel Sanz > DEGREMONT 5 Recuperación de Energía y Cogeneración
  • 6. NEXT FUTURE: FORWARD OSMOSIS BREAKTHROUGH?• In 5 – 10 years could be an breakthrough Innovation• These type of solutions could divide energy consumption by 2 or 3• Solutions like … Forward Osmosis:• FO basis is not new: It was be patented by Sydney Loeb in 1970 (one of the pioneers of first reverse osmosis membranes and applications) 6
  • 7. CONCLUSIONS FOR THE FUTURE LESS ENERGY CONSUMTIONRO and Energy consumption will have a lot of improvements still to implement in the following years:• Improvement of efficiency of pumps, motors and frequency converters. Size increase of equipments and design optimisations.• More Energy Recovery Devices and even more efficiency: There is already a new generation of pressure interchanger systems, slightly improving the characteristics of existing ones… and in a continuous evolution• New developments of RO membranes with a better permeability, less salts pass and a bigger size. There is also nanotechnologies applied into RO membranes. This is the most promising field and with a wide margin to improve.• The Membranes Use (UF, MF) in the Pretreatments; single or w/DAF. Nanotechnologies in UF…In few years probably will be and real Innovation breakthrough: FORWARD OSMOSIS 7
  • 8. ENERGY AS MOTOR OF SWRODESALINATION DEVELOPMENT ¿QUESTIONS? THANKS FOR YOUR ATTENTIONMiguel Angel SANZmiguel.angel.sanz@degremont.com 8
  • 9. 6th World Water Forum 12-17 March 2012. Marseille, France• The Priority for Action « Harmonize Energy and Water » will be structured around 8 targets .• Target 2, lead by IDA, Energy Efficiency in Desalination Plants: “Create an Energy Task Force, and develop a guide allowing to achieve a 20% energy reduction in desalination by 2015”• IDA Session on March 14th from 14:30 to 16:30• Organizers:World Water Council, French Government andCity of Marseille