Ultraviolet Water Purification & Disinfection

UV disinfection systems are an effective and economical means of water purification and water disinfection, by eliminating harmful bacteria and other microbes from drinking water supplies, regardless of source. UV light  is suitable for water supplied from rain tanks, springs, bores and surface sources such as lakes and streams. UV is commonly used for water disinfection, uv sterilisation and water treatment on a wide range of water sources by many local municipal governments, councils, food, dair, aquaculture, pharmaceutical, wine and brewing industries and by thousands of domestic  and industrial consumers to ensure their water is safe to drink. 

Infralight Technology will design and supply a system that is suitable for your budget and requirements. 

Standard & Custom Solutions 

Infralight supplies a wide range of uv  disinfection and uv water treatment systems, both standard and custom designs available. This means any flow requirement can be met. The design of the Infralight UV series is intended to provide many years of reliable operation at an economical price. The treatment chambers are usually 304 stainless steel (316 is available) with the option of plastic (369/900/1000 models only) for seawater applications. A range of options is available to customise the system but the basic specificationis suitable for domestic, farm and light commercial use.

The SF Series UV water disinfection systems are designed for continuous operation treating cold water at any flow from 0/min up to the specified design rate. The SF series use standard low pressure UV lamps with single ended connections for ease of lamp change.  The SF range is suitable for potable water , food and beverage use. Product is UL certified.

Sizing of the UV System

Microorganisms must be exposed to the UV light for a certain amount of time. This is called the dose or more correctly fluency, measured as joules/m2: Ws/m2. The amount of UV light required is dependednt on the type of organism, but most systems are based on flows to eliminate E.Choli. The pathogen must be exposed for a period of time by the correct amount of light at the right wavelength of 254nm.The relationship between light volume and time is critical for effective reduction. The dose of uv light required to effectively achieve a % reduction  is a logarithmic relationship. 

The dose of uv required to achieve 90% reduction is calleda  Log1 reduction. Doubling the amount of uv, Log2, will achieve a 99% reduction. Log3: 99.9, Log4: 99.99, log5:99.999. Most systems are designed to achieve a log4 reduction of 99.99%. E.Choli requires approximately 6mWs/cm2. To achieve a 99.99% reduction, multiply this value by 4 which is 24mWs/cm2. Most ultraviolet disinfection systems are designed  for a minimum 30mWs/cm2 dosage. 

Microorganism Inactivation Chart  

Pre-Filtering

Pre-filtration is usually required to ensure that particulate matter does not shield micro-organisms from the UV light. 20 micron cartridge filtration is the usual minimum. In cases with fine turbidity in the water, or if cysts like Giardia or Cryptosporidium may be present finer filtration may be necessary. In this case one micron filtration is required, usually but not necessarily for the whole supply, filtration for the drinking tap only may be practical. In drinking water treatment in particular the dual barrier approach to disinfection of using one micron filtration and UV is strongly recommended for the security this provides the user. For water containing high levels of sediment or iron, pretreatment with a backwashing filtration system is likely to be cost effective.

UV Disinfection Units for Domestic, Light Industrial and Farm Applications-Datasheets

Ultraviolet & Infrared Products- Leaders in UV  IR Technology