High-concentration ozone generator OZW MAX

dryindustrialfor water treatment

Product overview
OZW MAX is Salher's industrial ozonation system engineered for high flow rates and continuous 24/7 operation. The skid integrates all modules required to generate ozone from ambient air: compressor, buffer tanks, two-stage drying, PSA oxygen concentrator, ozone generator and water-cooled chiller, providing high-concentration ozone ready for injection into water. The unit is intended for pretreatment, targeted oxidation, odour and colour removal, and reduction of specific substances; it is not intended for final disinfection.

Technical Specifications

• Ozone output: approximately 500 g/h up to ≥ 1,500 g/h (project-dependent).
• Oxygen source: PSA oxygen concentrator, 90–95% purity.
• Generation method: corona discharge on dielectric with water cooling (chiller).
• Drying: two-stage drying to prevent nitric acid formation and generator corrosion.
• Injection: Venturi preferred; mass transfer efficiency up to 98%.
• Control & monitoring: PLC touchscreen, dissolved ozone and gas level monitoring.
• Protections: automatic shutdown for water backflow, cooling system failure, incorrect temperature/humidity or inlet pressure; alarms on faults.
• Residual gas treatment: outlet gas scavenger for residual ozone.

Applications

• Tertiary and advanced treatment of effluents at wastewater treatment plants (WWTPs) and small-scale WWTPs prior to discharge or reuse.
• Reduction of COD, BOD and colour in industrial effluents (textile, chemical, food industries).
• Oxidation of micropollutants and recalcitrant compounds to improve biodegradability.
• High-capacity drinking water treatment and industrial process water treatment.
• High-volume special applications such as ballast water treatment.

Notes

• Preliminary laboratory jar tests or pilot trials are performed to determine the optimal ozone dose before full-scale implementation.

Benefits

• Designed for continuous, stable 24/7 operation and handling large volumes.
• Reduces COD, BOD, colour, odour and turbidity; precipitates metals and certain toxic elements while generating less chemical sludge than conventional coagulation.
• On-site ozone generation avoids storage and transport of hazardous chemicals; ozone decomposes to oxygen and leaves no persistent by-products (half-life in water ~20 minutes).
• Improves biodegradability for downstream biological stages, aiding regulatory compliance and potentially reducing long-term chemical operating costs.
• Low-maintenance design with long-lasting consumables.

Technical specifications

• Ozone output: approx. 500 g/h to ≥ 1,500 g/h (project-dependent).
• Oxygen: PSA concentrator (90–95% purity).
• Ozone generation: corona discharge on dielectric with water cooling (chiller).
• Drying: two-stage drying to avoid nitric acid formation and generator corrosion.
• Injection method: Venturi preferred; mass transfer efficiency up to 98%.
• Control: PLC touchscreen; dissolved ozone and gas monitoring; automatic protective shutdown on faults.
• Residual ozone treatment: outlet gas scavenger.
• System components included: compressor, buffer tanks, drying unit, PSA oxygen concentrator, ozone generator and cooling unit (chiller).