Ozone (O3) is a strong oxidizer used for drinking water, wastewater and industrial disinfection. Istanbul ISKI Ikitelli and Ankara ASKI Tatlar plants run ozonation units. O3 is toxic (0.1 ppm TLV); corona discharge uses high-voltage + PSA oxygen. NFPA 91 requires exhaust capacity and NFPA 70 Class I Div 2 wiring for the generator room.
Ozone Properties
- Formula: O3, 48 g/mol
- TLV-TWA: 0.1 ppm
- IDLH: 5 ppm
- Odor threshold: 0.01 ppm
- Half life: 20 min in air
Generator Technology
- Corona discharge: 8-20 kV AC
- PSA O2: 90 percent purity
- Cooling water: 20-25 C
- Output: 10-100 kg O3/h large plant
- Energy: 8-15 kWh/kg O3
NFPA 91 Ventilation
- Generator room: 30 ACH min
- Emergency: 100 ACH leak
- Duct material: PVC, PVDF, 316 SS
- Ozone destruct: Catalytic or thermal
- Monitor: 0.1 ppm alarm
Electrical Classification
- Ozone room: Oxidizing environment
- Hydrogen risk: PSA electrolysis
- Class I Div 2: PSA O2 leak
- Grounding: HV RF
- Interlock: Exhaust fail -> stop
Turkey Uses
- ISKI Ikitelli: 420,000 m3/day ozonation
- ASKI Tatlar: 400,000 m3/day
- IZSU Cigli: Izmir wastewater
- Textile: Reactive dye decolor
- Food: Vegetable CIP disinfection
Ozone with MEP Calc
MEP Calc sizes ozone rooms 30 ACH, emergency 100 ACH, PSA oxygen 90 percent, corona 20 kV and NFPA 91 destruct unit.
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Download SprinkCalc on the App StoreNFPA 91, NFPA 70, OSHA 1910.1000, USEPA ozone, ASTM D5111. NFPA 91 Exhaust Systems.