Innovative system for Haemodialysis Equipment Disinfection OZONE-SAFE Innovative system for Haemodialysis Equipment Disinfection 29/09/2004 Steinbeis Transfercentre Biomedical Engineering

Steinbeis Transfercentre Biomedical Engineering OZONE-SAFE Innovative system for haemodialysis equipment disinfection: Compact, integrated, totally pre-assembled instrument Easy to be integrated in haemodialysis equipment Quick installation in little space Compact container, mounted on table, wall or ground Electrical / mechanical section easily accessible 29/09/2004 Steinbeis Transfercentre Biomedical Engineering

OZONE-SAFE operational requirements 6 Fresenius haemodialysis machines 2 distribution ringpipes: RO water / ozonated water Ozonated water circulating Consumption of ozonated water: 6 x 0.6 L/min = 0.216 m3/h Dose: 3 mg/L ozone in water Ozone production: 0.65 g/h => 2 g/h designed 29/09/2004 Steinbeis Transfercentre Biomedical Engineering

OZONE-SAFE System Concept 29/09/2004 Steinbeis Transfercentre Biomedical Engineering

OZONE-SAFE components Dry air Waste water Heat Water + ozone Feed gas RO water Ozone generator Contact system destruct. Haemodialysis equipment Off-gas Electric power Measurement& Control unit Prototype 29/09/2004 Steinbeis Transfercentre Biomedical Engineering

Dielectric barrier discharge High Voltage Electrode Discharge Gap Dielectric Barrier Ground Electrode High Voltage AC Generator ~ Micro discharges: Duration 10 ns, Diameter 100 mm 29/09/2004 Steinbeis Transfercentre Biomedical Engineering

OZONE-SAFE ozone generator High- voltage transformer Electric power Feed gas + ozone Dry air / oxygen Discharge cell Cooling system Frequency converter 29/09/2004 Steinbeis Transfercentre Biomedical Engineering

OZONE-SAFE Prototype Flow diagram diaphragm pump air dryer air gas flow meter filter 0.3m, 5m discharge tubes (ozone) ozone conc. meter air + ozone ozone destruction backpressure valve membrane contact system pressure sensor inlet valve gear pump water flow ring feed ring reflux RO water 29/09/2004 Steinbeis Transfercentre Biomedical Engineering

Steinbeis Transfercentre Biomedical Engineering OZONE-SAFE prototype 29/09/2004 Steinbeis Transfercentre Biomedical Engineering

OZONE-SAFE tests: ozone production 29/09/2004 Steinbeis Transfercentre Biomedical Engineering

OZONE-SAFE tests: test setup RO water inlet (6 bar gauge) OZONE SAFE prototype V3 V1 V2 Ring pipe Stub 1 Stub 2 RO water 0.5 – 1.5 bar g 29/09/2004 Steinbeis Transfercentre Biomedical Engineering

OZONE-SAFE tests: ozone concentration in water, stubs closed 29/09/2004 Steinbeis Transfercentre Biomedical Engineering

OZONE-SAFE tests: typical photometer readout 29/09/2004 Steinbeis Transfercentre Biomedical Engineering

OZONE-SAFE tests: draining via stubs 29/09/2004 Steinbeis Transfercentre Biomedical Engineering

OZONE-SAFE tests: ozone conc. in water, step response 29/09/2004 Steinbeis Transfercentre Biomedical Engineering

OZONE-SAFE advantages Complete electric and hydraulic system contained in small cabinet Gas cylinders for feed gas not required Cooling water for ozone generator not required Lightweight membrane contactor produces bubblefree ozonated water Supply of up to 6 haemodialysis machines with Cliquid > 3 mg/L 29/09/2004 Steinbeis Transfercentre Biomedical Engineering