By using of real laundry waste water as feed product the efficiency of DTE high performance membrane technology (HPMT) with and without impulse mode was compared at a system pressure of 0.15 MPa. The engaged ceramic membrane has a membrane area of 0.1 m2 and 1 kD molecular weight cut-off.
Whereas for example under conventional conditions the transmembrane flux decreases as expected (see first diagram right), the trans-membrane flux was constant practically at impulse mode with one active and one passive DTE flow initiator. Within a period of 6 hours the laundry waste water could be concentrated by factor 15. According to the last graphic right below the filtrate respectively permeate was obtained as a clear aqueous solution.
Advantages of HPM- Systems for conditioning of laundry waste water:
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Saving cost for electrical energy. That is because a high performance membrane system could operate with the same plant equipment and dimension at a feed flow of 150 l/h compared to conventional cross-flow conditions where a volume flow of 2,000 l/h is required to adjust an over flow velocity of 3 m/s.
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Acceleration, mixture respectively turbulence of the process medium is performed locally only where it is necessary for a membrane separation or membrane assisted reaction.
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Increase of membrane life time by suitable triggering of DTE flow initiators in combination with DTE RIP-modules.
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