OZONE DRINKING WATER SYSTEM

CONTENTS Properties of Ozone Production of Ozone Water Treatment Plant – 25 m 3 /hr Ozone Generation System

OZONEOXYGENCHLORINE O 3 O 2 CI 2 UNSTABLE STABLE STABLE PROPERTIES OF OZONE Heavier than the air. Irritating pale blue gas. Very reactive and unstable. Explosive and toxic, even at low concentrations. 14 times more soluble than oxygen.

PRODUCTION OF OZONE Electrolytic and chemical reactions. Exposing oxygen molecules to UV radiation at 185 nm wavelength. Corona discharge. Cold plasma method, pure oxygen gas is exposed to plasma created by dielectric barrier discharge.

+ +e-e- OZONE PRODUCED BY CORONA DISCHARGE

PLANT SETUP - 25 M 3 /HR

COMPRESSOR Function: Supplies minimum pressure required for ozone system Kg/cm 2 Capacity: 410 LPM Max Pressure: 18 Kg/cm 2 Air Compression: 6 (starts) – 9 (stops) Kg/cm 2 Safety Valve: 10 Kg/cm 2 Removal of water (moisture content). Check safety valve pressure adjustment.

FILTERS (Air Filter and Oil Filter) Function: Protects the ozone system from dust, moisture and oil due to high voltage. Max Pressure: 11 Kg/cm 2 Working Pressure: 6 – 9 Kg/cm 2 Cleaning and removal of moisture content, dust particles everyday from the filters. Checking of filter efficiency.

OXYGEN GENERATOR Function: Removal of moisture and nitrogen. Max Pressure: 11 Kg/cm 2 Working Pressure: 5 Kg/cm 2 Media in each : Silica Gel – Absorbs Moisture & Molecular Sieves – Absorbs Nitrogen Each cycle time: One column working, another in regeneration at intervals 3 – 4 mins Solenoid Valve: Pressure detection for regeneration and draining point for nitrogen. Installing the generator in the correct direction of flow. If Media in the indicator filter turns to white then the media in generator columns needs to be replaced.

SURGE TANK Function: Builds and maintains uniform pressure of oxygen for ozone generation. Max Pressure: 10.5 Kg/cm 2 Safety Valve: 10 Kg/cm 2 Outlet Pressure: 3.5 Kg/cm 2 Installing the tank in the correct direction of flow.

OZONE CONTROL PANEL Function: Controls the flow, pressure of oxygen and current to the ozone system. Pressure Regulator: Maintains constant pressure at 3.5 Kg/cm 2. Flow Regulator: Maximum flow 150 LPM Power Control: Maximum current 5 A. Timer: Set to 15 mins for flushing the cells at the start of the system. Oxygen Flow Switch: Connected to power supply to switch of the system when the flow is less. Flushing Oil Coolant for transformer.

OZONE GENERATOR Function: Production of Ozone. No. of Dielectric cells: 7 Nos. (6 circular and 1 in center) Voltage : V Maximum Capacity: 100 gm/hr. Check the water recirculation system every time.

FILTER FEED PUMPS No. of Pumps: 1 W + 1 S Type of Pumps: Mono blocks Capacity: 35 m 3 25 m Head After installation of pumps, direction of rotation of motor should be in accordance to flow.

FILTERS (PSF & ACF) Dimensions: 2.0 m H x 1.20 m Dia Test Pressure: 11 Kg/cm 2 Multiport Valves: Filtration, Backwash, Rinse, Recirculation, Waste, Closed & Pressure gauge Backwash is necessary when the pressure gauge reading increases by approx 2 Kg/cm 2. When operating multiport valves, pumps need to be switched off.

BOOSTER PUMP No. of Pumps: 1 W Type of Pump: Mono block, SS Capacity: 25 m 3 10 m Head Recirculation : 5 m 3 /hr After installation of pump, direction of rotation of motor needs to be checked. Ensure that recirculation of water to the ozone system.

CONTACT SYSTEM Venturi: 2 Nos. Capacity: 15 m 3 /hr Sequence: Convergent, Throat and Divergent Mixing Tank : SS, 330 mm H x 300 mm Dia (20 L) Venturi to be installed in the correct direction as per the flow to create negative pressure.

CONTACT CHAMBER Dimensions: 1.75 m H x 0.95 m Dia Volume: 1250 L Detention time: 3 mins Diffusers are installed at the bottom of the inlet pipe to have a better mixing. The Oxidation reduction potential is measured and displayed on the ORP panel.

Reactions take place several thousand times faster than those of chlorine and eliminates: Inorganic (iron, manganese, hydrogen sulphide, bromide) Organic (bacteria, viruses, protozoan’s ) According to the U.S. Council Of Environmental Quality: “Cancer risk among people drinking chlorinated water is 93% higher than among those whose water does not contain chlorine.”

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