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Forward osmosis biomimetic membranes in industrial and environmental applications

Forward osmosis biomimetic membranes in industrial and environmental applications. Niada Bajraktari PhD Student M.Sc. in Engineering. Water treatment. Water is found almost everywhere on earth and is essential for our survival. Water resources like rivers and lakes contain a lot of pollution.

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Forward osmosis biomimetic membranes in industrial and environmental applications

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  1. Forward osmosis biomimetic membranes in industrial and environmental applications Niada BajraktariPhD Student M.Sc. in Engineering

  2. Water treatment Water is found almost everywhere on earth and is essential for our survival. Water resources like rivers and lakes contain a lot of pollution. Every day, 2 million tons of sewage and industrial and agricultural waste are discharged into the world’s water (UN, 2003). Waterborne diseases kill people all over the world. 2.5 billion people worldwide live without improved sanitation (WHO 2008).

  3. Freshwater Seawater ∆π:Osmoticpressure difference across the membrane ∆P: Effectivehydraulic pressure Osmotic processes Applied pressure ∆P Retarding force ∆π Equilibrium PRO (∆P<∆π) RO (∆P>∆π) FO (∆P=0)

  4. Aquaporinchannels • Aquaporinwaterchannelsarefound in all livingcells – from plants to man • Aquaporinwaterchannelsonlyallowwater (H2O) to passthrough the channel • Eachaquaporinwaterchannel transports up to one billion watermoleculesper second!

  5. Biomimetic membranes

  6. Membrane fabrication Impermeable. Smooth coating of support membrane. No harsh chemistry or solvents. Co-existence with and anchoring of vesicles. Easy to mass produce in Roll by Roll setup. Highly permeable and selectivevesicles Impermeable skinlayer Hydrophilic support with lowstructure parameter (S)

  7. Thin-film compositemembranes Wesolvedthischallenge by creatingthin-film composite (TFC) membranes with aquaporinvesiclesembedded in a polyamidelayer on top of a microporoussuport. Water transport occurs via the aquaporinsinthe polyamidelayer. The presence of the TFC-aquaporinlayerenhancesthe flux by creatingselective pores with Ångstromdiameters effectivelylettingwatermoleculespasswhilerejectingothersolutes. Zhao et al J.Memb.Sci423-24, 422-428, 2012

  8. Current prototype Solution to be up-concentrated Aquaporin membrane Pump Draw solution is re-circulated Draw solution Module • Sample recovery: >98% • Sample size: 2 mL (variable) • Chemical stability: Common buffers • Working temperature: 4°C – 30°C

  9. Peptide up-concentration Assay 1:Peptide size: 0.692 kDaBuffer solution: TESUp-concentration range: 2-6 x Assay 2:Peptide size: 0.375 kDaBuffer solution: TESUp-concentration range: 3-5 x

  10. Pesticide removal “Pesticide pollution of rivers, lakes and wetlands directly poisons freshwater species, as well as people” Pesticidestested:DEIA: 145.5DaBAM: 190.03 Da Atrazine: 215.69 Da

  11. Concluding remarks The Promise The aquaporin membrane technology promises to reduce the energy consumption in water treatment processes by having high flux and high separation efficiency. The Challenge Need to develop robust, high performance, low cost membranes. The Future Forward osmosis biomimetic membranes is an exciting and innovative technology for the future water treatment and sustainable development.

  12. Acknowledgements • HenrikTækker Madsen • Kent Høier-Nielsen • Peter Lüttge Jensen • Karin Loft Eybye • Erik GydesenSøgaard • Claus Hélix-Nielsen www.ibiss.dk www.aquaporin.dk nba@aquaporin.dk

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