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Ultrafiltration fouling control

Ultrafiltration fouling control. Demineralized water backwashing. Louis Lagardère April-July 2009 . 09-07-2009. 1/14. Content. 1. Introduction (theory) 2. Experiment and Installation of the setup 3. Results 4. Conclusion 5. Recommendation. 09-07-2009. 2/14. 1. Introduction (theory).

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Ultrafiltration fouling control

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  1. Ultrafiltration fouling control Demineralized water backwashing Louis Lagardère April-July 2009

  2. 09-07-2009 1/14 Content • 1. Introduction (theory) • 2. Experiment and Installation of the setup • 3. Results • 4. Conclusion • 5. Recommendation

  3. 09-07-2009 2/14 1. Introduction (theory) • Demi water is better than UF permeate for backwashing (surface water) • Difference demi water/ UF permeate • Impact of sodium :

  4. 09-07-2009 3/14

  5. 09-07-2009 4/14 2. Experiment and installation of the setup Scheme of the setup

  6. 09-07-2009 5/14 Experimental setup Syringe pumps PLC controller Membrane module

  7. 09-07-2009 6/14 Material : - UF membrane : UFC M5 0.8, Norit X-Flow - Pumps : 1 NE1010 pump (backwashing), 1 DUAL-NE1010 (continuous filtration) Filtration protocol : - 1 cycle : 30 s filtration purge (120 or 240 l/(m^2.h)) 15 min filtration (120 or 240 l/(m^2.h)) 1 min backwash purge (2 x filtration flux) 1 min backwash (2 x filtration flux) - 1 experiment : 14 cycles tableau valves Explication cycles

  8. 09-07-2009 7/14 3.Results • Interpretation of the results :

  9. 09-07-2009 8/14 • Feed : Sea water (from den Haag and Zeeland) • Backwash :demi water and UF permeate • Flux : 120 l/(m^2.h)

  10. 09-07-2009 9/14 • Feed : Sea water • Backwash :demi water and UF permeate • Flux : 120 l/(m^2.h) and 240 l/(m^2.h)

  11. 09-07-2009 10/14 • Feed : Sea water • Backwash :demi water and UF permeate • Flux : 240 l/(m^2.h)

  12. 09-07-2009 11/14 • Feed : sea water • Backwash :demi water and UF permeate • Flux :180 l/(m^2.h)

  13. 09-07-2009 12/14 • Feed : 2,5 mg/l Alginic acid + 3 mmol NaCl • Backwash :demi water and UF permeate • Flux :240 l/(m^2.h)

  14. 09-07-2009 13/14 4. Conclusion • For sea water, backwashing with demi water is also more efficient than backwashing with UF permeate • The higher the filtration flux is, the more fouling we can observe

  15. 09-07-2009 14/14 5. Recommendation • More experiments should be conducted for alginic acid solution • Tap water should be tested to check whether it can replace demi water for sea water application (cheaper)

  16. Ultrafiltration fouling control Demineralized water backwashing

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