Ozone Generator and UV System for Drinking Water Treatment

For drinking water treatment, ozone is applied at a dose of 0.2–0.4 mg/L with a contact time of 5–10 minutes, achieving sufficient CT value for 4-log coliform inactivation while leaving a residual of 0.05–0.1 mg/L ozone that dissipates before consumption. The small ozone generator (OZ India 2g/hr or 5g/hr) generates ozone from ambient air, which is injected through a Venturi injector into the water line. PVDF non-return valves prevent water backflow into the ozone generator, and the simple system requires minimal maintenance.

UV disinfection works by exposing water to UV-C radiation (254 nm) from mercury vapour lamps within a quartz sleeve, allowing UV to penetrate the water while keeping the lamp dry. The water flows around the lamp in turbulent conditions (Reynolds number >2000) to ensure every water molecule receives the target UV dose. OZ India UV systems use low-pressure lamps (monochromatic 254 nm, 35–40% UV efficiency) for flows up to 10,000 LPH and medium-pressure lamps (polychromatic 200–320 nm, higher fluence rate) for larger flows. All lamps are PHILIPS or OSRAM sourced — ensuring consistent UV output over the 8,000-hour rated lamp life.

For bottled water plants, ozone treatment follows the standard FSSAI IS:14543 protocol: ozonated water (0.4 mg/L residual) contacts all surfaces of the filling line and bottle caps before filling, providing surface sterilisation of the packaging contact surfaces simultaneously with water disinfection. OZ India ozone generators for bottled water are designed for the cyclic duty required in filling operations — automatically adjusting output between high-demand filling cycles and low-demand CIP intervals.

RO plant post-treatment is a critical application for ozone and UV. RO permeate water, while low in dissolved solids, is not biologically sterile — bacteria can pass through damaged RO membranes and grow in permeate storage tanks. OZ India recommends UV post-treatment at 40 mJ/cm² after every RO system, sized for the RO permeate flow rate. For systems where ozone is also used (bottled water, pharmaceutical water), ozone provides both disinfection and biofouling prevention in distribution piping.

Smart dosing control ensures safe, compliant drinking water without over-dosing. OZ India UV systems include automatic UV intensity monitoring — a UV sensor measures the actual UV irradiance in real-time, calculating the achieved UV dose based on flow rate. When the UV lamp ages and intensity drops below 70% of initial value, an alarm triggers lamp replacement before the dose drops below the validated 40 mJ/cm² requirement. For ozone systems, the dissolved ozone monitor maintains the target residual automatically, protecting against taste-odour events from over-dosing.

OZ India Technology UV systems for drinking water are available in five standard configurations: 100–500 LPH (household/small office), 1,000–5,000 LPH (apartment pump room), 10,000–50,000 LPH (hotel/hospital/institution), 1,00,000 LPH (large campus/township), and 2,00,000 LPH (municipal intake). All configurations use 316L stainless steel chambers, quartz sleeves, and food-grade wetted materials — meeting NSF/ANSI 61 requirements for drinking water contact. CE certification covers both the UV chamber and control panel.

For bottled water plants, OZ India supplies compact 2g/hr and 5g/hr ozone generators with built-in air preparation (dryer + compressor), Venturi injector, and stainless steel contact coil. The system operates in batch mode — ozonating each batch of water in the storage tank before filling. Dissolved ozone monitor ensures the 0.4 mg/L FSSAI-required residual is achieved before filling commences, with automatic hold if residual is below set point. This eliminates the risk of non-compliant product reaching consumers.

OZ India also provides complete RO + UV + ozone water treatment systems for packaged drinking water units, hospitals, pharmaceutical plants, and industrial campuses. The integrated system includes: sand filter + activated carbon filter + RO + UV + ozone, all mounted on a single stainless steel skid with a common control panel. This plug-and-play approach reduces installation time to 1–2 days and provides a single-vendor responsibility for the complete water treatment train.

All OZ India drinking water UV and ozone systems include factory testing at full flow before dispatch, UV validation documentation (lamp datasheet, irradiance calculation), installation and commissioning service, and 1-year warranty. Replacement UV lamps (8,000-hour rated life — approximately 1 year of continuous operation) are stocked ex-Greater Noida. Annual service contracts include lamp replacement, quartz sleeve cleaning, and UV sensor calibration — maintaining system performance and regulatory compliance year-round.

UV system sizing for drinking water requires: design flow (LPH or m³/hr) and UV transmittance (UVT%) of the inlet water at 254 nm. UVT is measured with a spectrophotometer — most filtered or RO water has UVT 85–99%. A lower UVT (due to colour or dissolved organics) requires higher lamp power to deliver 40 mJ/cm². OZ India sizes UV systems to deliver 40 mJ/cm² at minimum UVT (worst case) and maximum design flow. Contact us with your flow rate and a water analysis report for a free sizing calculation.

Ozone sizing for drinking water treatment: at 0.3 mg/L ozone dose, the required ozone generator capacity = Flow (LPH) × 0.3 mg/L ÷ 1,000,000 × 1,000 g/kg × 1.3 safety factor. For a 10,000 LPH bottled water plant: 10 m³/hr × 0.3 g/m³ × 1.3 = 3.9 g/hr → OZ India 5g/hr generator is the appropriate selection. For drinking water, the 2g/hr generator covers flows up to 6,000 LPH; 5g/hr covers up to 15,000 LPH; 10g/hr covers up to 30,000 LPH at standard drinking water ozone doses.

For RO plant post-treatment, the UV system is always sized to the RO permeate flow rate — not the feed flow. RO recovery rates of 70–80% mean a 10,000 LPH feed produces only 7,000–8,000 LPH permeate. This is the flow the UV system must treat. OZ India provides a complete system layout drawing showing the recommended placement of UV after the RO permeate tank and before the product water tank or filling line — ensuring no possibility of re-contamination between treatment and use.