EVALUATION OF POTENTIAL OF FORWARD OSMOSIS
PROCESSES FOR WASTEWATER REUSE PURPOSES
De la Torre, T., Arnaldos, M., Corzo, B...
Index
1.FO opportunities and challenges
2.Long-term experimentation
 FO-MBR pilot plant
 FO-NF demonstration plant
3.Cos...
Index
1.FO opportunities and challenges
2.Long-term experimentation
 FO-MBR pilot plant
 FO-NF demonstration plant
3.Cos...
FO opportunities and challenges
Why?
 Low and reversible fouling
 Less pretreatment
 Less chemical cleaning
 Product w...
Market niches in wastewater reclamation
Industrial wastewater
• Requiring high quality and complex treatment
• With foulin...
FO Challenges
 Low flux (ICP & ECP)
 DS recovery is energy intensive
 DS costs (Js and incomplete DS recovery)
 Permea...
Index
1.FO opportunities and challenges
2.Long-term experimentation
 FO-MBR pilot plant
 FO-NF demonstration plant
3.Cos...
FO-MBR
Pilot scale FO-MBR plant
• Feed: 4L/min, 1 bar
• DS: 1L/min, 0.5 bar
• DS concentration: 1.5 M
• Activated sludge (...
FO-MBR: Results
• 2 DS selected after modelling: K4P2O7 and HCOOK
• Sustained long-term operation with minimal fouling and...
Index
1.FO opportunities and challenges
2.Long-term experimentation
 FO-MBR pilot plant
 FO-NF demonstration plant
3.Cos...
FO-NF plant
LIFE-OFREA FO-NF demonstration plant
• Region of Murcia: 98% of wastewater is reused, mostly in
agriculture. T...
 Simulation between modules in series using Matlab
 Experimentation with commercial elements in batch
Feed water
FO-NF p...
FO-NF plant
LIFE-OFREA FO-NF demonstration plant
• Commisioning December 2014
• 3 m3/h effluent from WWTP of San Pedro del...
FO-NF plant: permeability evolution
• Stable operation of the FO
• NF permeability decreased due to fouling but then stabi...
FO-NF plant: permeate quality
• Stable permeate quality
• Low conductivity
• B < 0.4 mg/L (>70% removal)
• High quality fo...
Index
1.FO opportunities and challenges
2.Long-term experimentation
 FO-MBR pilot plant
 FO-NF demonstration plant
3.Cos...
UF+RO vs. FO+RO:
CAPEX:
 Membrane prices for FO should go down in the future years
OPEX:
 Energy consumption is higher f...
Index
1.FO opportunities and challenges
2.Long-term experimentation
 FO-MBR pilot plant
 FO-NF demonstration plant
3.Cos...
Conclusions
• Niches of FO in wastewater reclamation:
• Potable reuse
• Agricultural reuse: specially if 2-RO passes are n...
Acknowledgements
We would like to thank the collaboration of Aguas y Servicios de la Costa Tropical
and HTI for the membr...
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Ponencia de Teresa de la Torre, ACCIONA Agua en Euromed

“La evaluación de los procesos de forward osmosis en los procesos de depuración y reutilización de agua “, esta a ponencia será impartida por Teresa de la Torre. Más información sobre la participación de ACCIONA en Euromed: http://acciona.sa/MTo0W
Published on: Mar 4, 2016
Published in: Business      
Source: www.slideshare.net


Transcripts - Ponencia de Teresa de la Torre, ACCIONA Agua en Euromed

  • 1. EVALUATION OF POTENTIAL OF FORWARD OSMOSIS PROCESSES FOR WASTEWATER REUSE PURPOSES De la Torre, T., Arnaldos, M., Corzo, B., Ferrero, E., Navea, S., Simón, P., Rodríguez, C., Malfeito, J.J. ACCIONA Agua and ESAMUR
  • 2. Index 1.FO opportunities and challenges 2.Long-term experimentation  FO-MBR pilot plant  FO-NF demonstration plant 3.Costs: first impressions 4.Conclusions
  • 3. Index 1.FO opportunities and challenges 2.Long-term experimentation  FO-MBR pilot plant  FO-NF demonstration plant 3.Costs: first impressions 4.Conclusions
  • 4. FO opportunities and challenges Why?  Low and reversible fouling  Less pretreatment  Less chemical cleaning  Product water customization (e.g. boron removal, fertigation)  Improvements in FO membranes:  Thinner membranes with less tortuosity (S parameter)  less ICP and higher flux  More providers  lower prices (Mi and Elimelech, 2009) (Achilli et al., 2010)
  • 5. Market niches in wastewater reclamation Industrial wastewater • Requiring high quality and complex treatment • With fouling problems (requiring extensive pretreatment) • Applications with no DS separation • Residual heat • Case-specific Municipal wastewater Potable reuse •Indirect or direct (Singapur/Namibia…) •Multibarrier concept is state of the art Industrial •Cooling towers Agriculture •Boron •Micropollutants •Salinity •Heavy metals Source: AQUAREC, 2006 FO opportunities and challenges
  • 6. FO Challenges  Low flux (ICP & ECP)  DS recovery is energy intensive  DS costs (Js and incomplete DS recovery)  Permeate quality  No data: main studies are lab-scale, synthetic feed, short term and batch Realistic studies are still needed This study: 2 FO-pilot plants operating with real feed, continous, long-term (months):  FO-NF  FO-MBR FO opportunities and challenges
  • 7. Index 1.FO opportunities and challenges 2.Long-term experimentation  FO-MBR pilot plant  FO-NF demonstration plant 3.Costs: first impressions 4.Conclusions
  • 8. FO-MBR Pilot scale FO-MBR plant • Feed: 4L/min, 1 bar • DS: 1L/min, 0.5 bar • DS concentration: 1.5 M • Activated sludge (AS) conductivity: 1000 S/cm • Continuous operation during one month per selected DS using real activated sludge Membrane test cell (CTA, HTI)
  • 9. FO-MBR: Results • 2 DS selected after modelling: K4P2O7 and HCOOK • Sustained long-term operation with minimal fouling and consistent water fluxes for K4P2O7 and HCOOK • No chemical cleaning • Similar Js and Jw for both DS K4P2O7 HCOOK
  • 10. Index 1.FO opportunities and challenges 2.Long-term experimentation  FO-MBR pilot plant  FO-NF demonstration plant 3.Costs: first impressions 4.Conclusions
  • 11. FO-NF plant LIFE-OFREA FO-NF demonstration plant • Region of Murcia: 98% of wastewater is reused, mostly in agriculture. The rest present high salinity • San Pedro del Pinatar WWTP effluent: • Conductivity: 4-6 mS/cm • Boron: 1.5 ppm • www.life-ofrea.com
  • 12.  Simulation between modules in series using Matlab  Experimentation with commercial elements in batch Feed water FO-NF plant: design
  • 13. FO-NF plant LIFE-OFREA FO-NF demonstration plant • Commisioning December 2014 • 3 m3/h effluent from WWTP of San Pedro del Pinatar (Murcia, Spain)
  • 14. FO-NF plant: permeability evolution • Stable operation of the FO • NF permeability decreased due to fouling but then stabilized • Permeability FO=Flux/( DS feed T corrected • Permeability NF=Flux/NDP (T corrected)
  • 15. FO-NF plant: permeate quality • Stable permeate quality • Low conductivity • B < 0.4 mg/L (>70% removal) • High quality for agricultural reuse except for SAR > 100 mequ/L
  • 16. Index 1.FO opportunities and challenges 2.Long-term experimentation  FO-MBR pilot plant  FO-NF demonstration plant 3.Costs: first impressions 4.Conclusions
  • 17. UF+RO vs. FO+RO: CAPEX:  Membrane prices for FO should go down in the future years OPEX:  Energy consumption is higher for the FO+RO (this study; McGovern and Lienhard, 2014,..)  Chemicals • Low fouling: • Membrane replacement and chemicals for cleaning and shutdowns will be lower for the FO option. • Low or zero pretreatment: no antiscalant, pH adjustment, FeCl3,… • Draw solution costs due to Js and incomplete recovery  economical DS must be found Cost comparison
  • 18. Index 1.FO opportunities and challenges 2.Long-term experimentation  FO-MBR pilot plant  FO-NF demonstration plant 3.Costs: first impressions 4.Conclusions
  • 19. Conclusions • Niches of FO in wastewater reclamation: • Potable reuse • Agricultural reuse: specially if 2-RO passes are needed • Industrial uses • FO-NF & FO-MBR operated in the long term with real feed: • Stable operation • High permeate quality (conductivity and boron) • SAR must be adjusted • No fouling in the long-term • Costs • Relevant cost due to DS losses and DS reconcentration energy • Balance between cost of DS, membranes and energy needed FO application is still challenging…but is becoming a reality!
  • 20. Acknowledgements We would like to thank the collaboration of Aguas y Servicios de la Costa Tropical and HTI for the membrane coupons. The research leading to these results has received funding from: • LIFE+ Programme of the European Commision (LIFE12/ENV/ES/000632 LIFE OFREA) www.life-ofrea.com • People Programme (Marie Curie Actions) of the European Union’s Seventh Framework Programme FP7/2007-2013 under REA agreement 289193 (SANITAS Project). www.sanitas-itn.eu teresa.torre.garcia@acciona.com This presentation reflects only the author's views and the European Union is not liable for any use that may be made of the information contained therein.

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