Micro organisms and pathogenic organisms can be destroyed by exposing them to energy in the form of ultra violet light. Continuous cycling prevents them from regenerating. The DNA bonds are broken and so they are unable to reproduce. Ultra violet light inactivates viruses, mould spores, bacteria (including Legionella and E.coli) and yeasts.

It is an environmentally friendly way to kill these organisms as no chemicals are added to the water. It breaks down bacterial components leaving the water chemistry unchanged so there are no potentially dangerous chemicals in the water.

Uses: Cooling water, drinking water, (hotels & domestic). Industrial water, (Food processing), swimming pool water and wastewater can all be treated with U.V.

Fresh and re-used waters can be treated, as there are no chemical taints or colourations.

Dosage is expressed in milijoules/cm². dose = Intensity x Time. Doses are to suit application.

Clarity governs how much and what distance U.V. travels through the water. Cleanliness determines flow rates but anything from 1m³/hr to 200m³/hr can be catered for.

Units can be mounted in normal pipe-work systems. They can be of single or multilamp designs depending on flow rates to ensure adequate exposure to U.V. Production process water can be treated when and where required. The U.V. bulbs can be cleaned by either chemical or wiper method.

Continuous monitoring is available to give accurate and reliable indication of water quality. Thus an accurate and continuous water supply is ensured with flavour preservations and low running costs.

Benefits:

• High and consistent levels of treatment and quality
• Simple and cost effective operation
• Water conservation
• Improve and maintain water quality
• Fresh or reuse allows greater water conservation
• With minimized waste and disposal cost, operating costs are reduced in both the short and long term.

Simple installation and operation:

• Can usually be installed without major modifications
• Once installed, maintenance is minimal and can be carried out by onsite staff, (bulb changing)

Variables:

• Liquid flow rate (l/sec, m3/hr), affects exposure time
• Transmission level of water-how effectively U.V. can pass through
• Micro organisms present-what needs to be treated
• Temperatures up to 60C can treat warm liquids
• Flow consistency-periodic or continual
• Flow type-laminar or turbulent flow