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

2. 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

3. 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 = 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

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

5. 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

6. 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

7. 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

8. 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

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

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

11. 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

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

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

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

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

16. 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