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UV & Ozone Technologies

Milk & Dairy

 UV Disinfection of Dairy Process Water

 Contamination of  dairy process water  can result in loss of product (not only resulting in production losses, but also higher waste effluent surcharge costs), product recalls, and lost consumer confidence. UV water disinfection using offers a viable alternative to conventional disinfection techniques for ensuring safe, microbe-free water and processing fluids in the dairy industry. Water containing high starch concentrations, transport water containing processing residues and process fluids can all be successfully treated using UV water disinfection.

NEW! UVEO Energy efficient systems.

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Advantages of UV Disinfection of Dairy Process Water

UV disinfection is the most cost effective method of water disinfection, it is superior to alternatives, it is safe and has no detrimental effects.

Most Efficient Water Disinfection

  • No micro-organisms survive UV water disinfection
  • The water disinfection is effectively monitored
  • Hanovia UV systems provide permanent, accurate , water treatment records, so all batches can be traced. Ideal for ISO9000 etc
  • UV disinfection is the most cost effective method of water disinfection.

Water Disinfection Superior to Alternatives

  • Chlorine is often unacceptable because of the flavour effects
  • Sterile filtration does not remove all the spores from water
  • Pasteurisation is expensive in capital equipment and running costs
  • UV water disinfection is the most environmentally friendly way to reduce the number of viable organisms, without causing further pollution

No detrimental effects

  • Water disinfected by UV has no effect on pH, colour, flavour and aroma
  • Water disinfected by UV has no detrimental effect on product stability
  • UV water disinfection leaves no residue
  • With UV disinfection of water overdosing is not possible

Safety of UV Water Disinfection

  • No hazardous chemicals are required in UV water disinfection
  • UV disinfection produces no toxic by-products.

Watch the Video About Hanovia Performance Qualified UV Systems (see below)


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Enquire Now

PureLine UV System

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Designed specifically for the stringent disinfection needs of food & beverage processors.

Hanovia PureLine UV System

The PureLine range of water UV systems has been designed specifically to meet the water treatment needs of food and beverage processors and manufacturers. Eight decades of continuous development, and working with the biggest names in the food and beverage industries has given Hanovia invaluable insights into the industry's process water treatment and water disinfection needs. The result is the newly released range of PureLine UV systems for the pure, simple and non-chemical disinfection of water.

The PureLine UV disinfection system range includes models to suit every water disinfection requirement:

  • NEW! Pureline UVEO- Unparalleled energy efficient water treatment
  • PureLine PQ-  For high purity food and beverage applications requiring 3rd party validation of disinfection.
  • PureLine D- General water disinfection when validation is not required
  • PureLine DC- For process water requiring dechlorination

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Watch the video for more information about the new energy efficient Pureline UVEO.

NEW! Features Exclusive to the Pureline UVEO (Energy efficient system)

  • 60% less power usage
  • Redesigned chamber to drive efficient and optimum water treatment
  • Redesigned lamp and ballast combination delivers unrivalled power saving flexibility and control
  • Redesigned controls allow for more efficient operating systems which extend the lamp life and provide energy savings.
  • Optimised design treats high flows with only one Hanovia Medium Pressure Lamp for savings in system size and lifecycle costs
  • Easy maintenance and operation
  • Can be retrofitted into existing pipework
  • Check the UV duty sensor without interrupting the treatment process. 
  • Available with an automatic cleaning system to maintain output efficiency and reduce maintenance requirements.


Features of the Pureline UV Disinfection System Range

  • Chamber seals designed to withstand food and beverage CIP procedures 
  • Available with validation independently tested and validated to the exacting 2006 USEPA protocol following the UV Disinfection Guidance Manual (UVDGM) guidelines. 
  • Patented UV light protection shutter allows removal of the dry UV sensor without system shutdown. 
  • Accurate UV dose delivery without an external UV transmittance input.
  • Simple replacement of UV lamps without draining the chamber.
  • Chamber materials Certified by WQA to NSF/ ANSF61 for potable water. 
  • Real time data display with event logging, continuous UV monitoring, dose optimisation, continuous display of validated UV dose
  • Modbus and hardwired interface to SCADA systems.
  • Optional dose control is also available on some models.
  • The latest UV lamp technology including the latest electronic ballast for extended lamp life; high efficiency long life amalgam lamp technology; MP lamps. *available on selected models
  • Peace of mind with optional 5 year manufacturers warranty on the UV system*

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 *conditions apply

UV Water Treatment Validation

PureLine PQ- For Validated & Performance Qualified Water UV Treatment. The Hanovia PureLine PQ is ideal for the UV disinfection of food and beverage process water. With 3rd party validation you're guaranteed disinfection performance for every food and beverage process water application.

PureLine PQ gives you environmentally friendly, complete disinfection of process water without compromise!

Watch the Video About Hanovia Performance Qualified UV Systems (see below)


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 About Hanovia UV Systems

  • Hanovia UV systems conveniently fit into existing pipework in most process areas
  • Minimum site preparation
  • Pre-assembled units available pre-wired and skid mounted, requiring only connection to electrical supply
  • Silent operation
  • Can interface with most computer controlled continuous and batch processes
  • Inexpensive and Simple to Maintain
  • Simple and safe operation easily understood by operators
  • Designed for remote operation
  • Replacement of Arc Tubes is quick and simple

Rigorous Quality Control ISO 9001

  • All Hanovia stainless steel chambers and Arc Tubes built to the highest possible standards
  • Every Arc Tube is individually checked and each completed system tested and run before despatch.
  • Test certificates always supplied

All Hanovia UV Disinfection Systems include:

  • Disinfection chamber
  • Arc tube
  • Control/ power supply cabinet
  • UV monitor (optional)
  • Automatic cleaning mechanism (optional)

Why Is Hanovia the Leading UV Supplier?

  • Hanovia has pioneered the use of UV in various applications for over 75 years
  • Hanovia manufactures its own stainless steel cambers, quartz sleeves and arc tubes to the highest possible standards
  • Hanovia is the only system manufacturer which also makes Arc Tubes



Visit the Hanovia website: www.hanovia.com


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Brewery pure final waterEnvironmentally Friendly Pure Final Product Water thanks to Hanovia UV Water Disinfection

Korea's Hite Brewery Company  has installed UV water disinfection systems to help keep the water used in its production processes free from microbial contamination. As part of its environmentally conscious approach to brewing, they have recently installed 25 Hanovia UV water disinfection systems at its Massan and Gangwan plants. The UV systems ensure water used in the production processes remains free from microbial contamination, ensuring a high quality, pure final product.  Read More about using UV Disinfection in Brewing ....

Innovative, 4th Generation Family Winemakers, Brown Brothers use Hanovia UV Disinfection for sterile water.

“Our Hanovia UV system has worked perfectly since we installed it in 2009. We routinely get a zero (bacterial) count after the UV (treatment)". Brown Brothers is one of Australia’s leading family-owned wine companies, with the Brown family making wine in Victoria for over 120 years. Over this time Brown Brothers has established a reputation as one of Australia’s most innovative wine producers. Read more about UV disinfection for sterile water in winemaking..

UV Treatment of Water in the Food and Beverage Industries

In an increasingly regulated and safety-conscious market, the food and beverage industries have to meet ever more stringent standards of quality. Microbial growth due to contaminated water or ingredients can cause discolouration, off flavours and shortened shelf-life. The threat of contamination is further increased as manufacturers respond to demands for less chemical additives and preservatives. Effective microbial disinfection of the whole process is therefore essential. UV treatment of water is ideal for the food & beverage industries. Read more about UV Treatment of water in Brewing...


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Applications of UV Disinfection in Dairy Production: 

  • Pre-Treatment Disinfection
  • Cooling Media ( Chillers, etc.)
  • Direct Contact Fluids and Ingredients
  • CIP, Bottle Rinse or Wash Waters
  • Tank Headspace

The Role of UV Treatment for Water

Outbreaks of water-borne pathogens place producers at high risk of costly and damaging recalls and product liability. In addition, UV treatment for water and the disinfection of product and package surfaces effectively extends shelf life, providing huge cost savings for our customers. Hanovia has led the way in pre-treatment  and UV treatment for water disinfection and treating direct contact fluids and ingredients, CIP and bottle rinse, tank headspace etc.

Pre-treatment using UV Treatment for Water 

  • Placement of the UV treatment for water system ahead of the carbon filters for dechloramination provides higher carbon filter efficiency resulting in longer carbon runs, thus decreasing your operating costs. In addition to extending the life of carbon beds, dechlorinating process water will remove the off flavours associated with chlorine disinfection. The flavour of the final product will remain unadulterated and free from undesirable flavours and odours.

Post Carbon

  • The carbon filter forms an ideal environment for micro organisms to grow rapidly, thus producing biological contamination. UV treatment for water of carbon filtered water has been an accepted application for many years. Ozone has the same detrimental effects on beverage flavours as chlorine compounds, thus ozone must be removed from product waters. UV treatment for water systems also provide a safe, simple means of deozonation.

CIP, Bottle Rinse or Wash Water

  • Even water used to clean surfaces or used in CIP operations can be a source of contamination. UV treatment for water is an approved method of reducing bacteria without the use of chemicals.

Waste Water

  • Process plant effluents can be treated without the use of environmentally hazardous chemicals using UV treatment for water.

Cooling Media and Chiller Disinfection

  • Many foods are subject to contamination after heat treatment. UV  treatment for water provides an excellent way to protect foods from contact cooling fluid contamination.

Direct Contact Water or Ingredient

  • Water as an ingredient in a food or coming in direct contact with food can be a source of contamination. UV treatment for water can disinfect this water without chemicals or pasteurization.

Re-use & Irrigation

  • UV treatment for water provides tremendous benefits in water re-use and irringation.  Dump tanks, Re-use and Irrigation, and Wash waters can all be protected from contamination with UV disinfection.

Tank Headspace

Material storage tanks require direct headspace protection as well as eliminating intrusion during drain and fill operations.

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How Does Ultraviolet Disinfection Work?

Ultraviolet energy causes permanent inactivation of micro-organisms by disrupting its DNA so that they are no longer able to maintain metabolism or reproduce. All bacteria, spores, viruses and protozoa (including Cryptosporidium and Giardia oocysts are permanently inactivated by UV). The maximum effectiveness occurs at between 240nm and 280nm. The Hanovia UV systems produce these wavelengths in abundance.

The Mechanism of Ultraviolet Disinfection

Strong sunlight disinfects water by permanently de-activating bacteria, spores, moulds and viruses. Over a century ago, scientists identified the part of the electromagnetic spectrum responsible for this well-known effect; wavelengths between 200nm and 300nm, often called UV-C. The most effective single wavelength is typically UV at 265nm, however recent research in the USA has shown that 271nm light and 263nm light are the most effective UV wavelengths for the deactivation of particular target organisms. 

The mechanism of kill is well documented and unlike chemical disinfectants the organism is unable to develop any immune mechanisms. The mechanism of kill involves the absorption of photons of UV energy by the DNA, which fuses the DNA and prevents replication. DNA (Deoxyribonucleic acid) consists of a linear chain of nitrogen bases known as purines (adenine and guanine) and pyrimidines (thymine and cytosine). These compounds are linked along the chain by sugar-phosphate components. The DNA of most forms of life is double stranded and complimentary; the adenine in one strand is always opposite thymine in the other, and linked by a hydrogen bond, and guanine is always paired with cytosine by a hydrogen bond. The purine and pyrimidine combinations are called base pairs. When ultraviolet light of a germicidal wavelength is absorbed by the pyrimidine bases (usually thymine) the hydrogen bond is ruptured. The dimer that is formed links the two bases together, and this disruption in the DNA chain means that when the cell undergoes mitosis (cell division) the DNA is not able to replicate. The most effective wavelengths to achieve this effect are found between 263nm to 275nm, and the peak wavelength distribution is dependent on the target organism.

The optimal operating temperature is 15oC, and the lamp output will fall off rapidly as the lamp temperature migrates from this condition. These lamps should not be used if the water is hot or cold, or if the water flow is intermittent as the temperature build up will cause the lamp output to decrease. Frequent switching of these lamps will have a detrimental effect on lamp life, and the most probable failure mode will be failure of the filaments, which become brittle. The article "The dying of the light" describes the variable output of these mass produced lamps and offers some suggestions as to how the performance might be optimised. Typically these lamps have an efficiency of 25-30%, which is temperature dependent. The lamp life is typically 8000 hours, and the lamps have the advantage of being mass produced and easily second sourced.

Amalgam lamps have been developed recently to overcome the problems associated with traditional low-pressure technology. This type of lamp contains a mercury amalgam, and typically up to 120mg of mercury is contained in each lamp. The Amalgam lamp is typically very long, and not unusually can be more than 1.5 m (5 feet) in length. Once switched on, the Amalgam lamp output is not effected by water temperature fluctuations, however the large size of the lamp does mean that they can take up to 800 seconds to get to full power, and the warm up time is temperature dependant, as the successive strikes below illustrate.

Ultraviolet  Applications

Research is now being undertaken to verify the effect that shorter wavelength ultraviolet  light has on the other cell membrane of the organism. This shorter wavelength is more energetic and is absorbed by the organisms outer membrane. A lethal insult is effected, which means that the cell is unable to effectively regulate osmotic pressure. This effect coupled with the fusing of the DNA means that UV is a simple, elegant disinfectant and one that will increasingly replace the more traditional chemical techniques.

The Production of Ultraviolet Light

Ultraviolet light is most typically generated from a low pressure or a medium pressure lamp. These lamp types are different in character and performance, and are described below:

Low Pressure ultraviolet lamps are the most common lamp type and are the oldest source of ultraviolet light. The consist of a quartz envelope that separates two tungsten filaments. The lamp is evacuated to <10torr and approximately 60mg of mercury is introduced into the quartz envelope. The spectral output of this lamp type is monochromatic, a single line output at 253.7nm. A fluorescent lamp is a low-pressure lamp that has the inner surface of the lamp coated with phosphors to absorb all of the 253.7nm light, and only emit the longer wave visible light. This lamp type is typically 1 meter (3 feet) in length. This lamp has an output that is temperature dependent and can take up to 400 seconds to get to full output in cool or hot water.

The medium pressure ultraviolet lamp that is built by Hanovia is designed to have a spectral output that is specifically enhanced in the germicidal region. These lamp types are often called polychromatic, as they have a continuous output from 200nm up to the long wave visible light. Medium pressure lamps have a deeper vacuum produced within the quartz envelope (typically 1000 torr) and a 3.5Kw lamp will contain approximately 300mg of mercury. The Hanovia lamps have an efficiency of between 15% to 20%, depending on lamp type, and typically 15 low pressure lamps or 6 amalgam lamps will have a comparable output. The medium pressure lamp is hot running and typically the lamp surface will reach 800oC, however the protective sleeve that separates the lamp from the fluid being treated will not usually rise above 60oC. An over temperature detector will power down the lamp should the water flow stop for an extended period. Medium pressure lamps are typically from 20cm to 1.5M in length and a variety of quartz types are selected depending on the required spectral output; pure fused silica is used for disinfection, dopants are introduced to enhance particular spectral regions, or to inhibit ultraviolet wavelengths which at extremely high ultraviolet doses could have detrimental effects.

The Hanovia ultraviolet lamps are built at the Slough factory in a clean room environment. Every lamp is individually tested before despatch, and each batch is 100% documented to ensure that in the unlikely event of a lamp failure, every lamp made in the suspect batch can be traced. Hanovia manufactures in excess of 12,000 lamps per annum. Each lamp is individually numbered and any lamp failure is investigated and a failure mode analysis report generated.

Ultraviolet Technology in Use

Ultraviolet technology is now applied by a broad range of operators from municipal effluent to ultrapure rinse water, and from viscous high brix sugar syrups to air. The technique has been successfully extended to disinfect packaging materials prior to filling, and new developments have included the use of UV to deodorise nuisance smells from industrial or municipal dischargers. Ultraviolet is also applied to drinking water to assist in the destruction of pesticides or other contaminants that have entered the aquifer, such as NDMA or MTBE. In each case, the ability of a monitoring system to measure the fluence being emitted by the lamp allows the operators to have confidence in the integrity of the system. Hanovia systems are designed to be fail safe and the control protocols that are used will not allow untreated water of effluent to be sent forward. The dedicated ultraviolet monitor measures the output from each lamp. The monitors are sealed and do not allow any operator adjustment. The Hanovia ultraviolet monitor measures intensity in absolute units of mw/cm2. An online transmittance monitor measures the transmittance of the fluid being treated, and not unusually surface water can have a very high fluctuation in transmittance. Use is made of data logging facilities to demonstrate the adequacy of treatment, and to provide a permanent record of disinfection. This transparency is often required by a regulator or by those further up the supply chain to demonstrate that the water used to make product or water used as a part of the manufacturing process in wholesome.

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Hanovia is Helping Al Rawabi Dairy in Dubai Keep its Milk Pure

To ensure the purity of its product, Al Rawabi Dairy in Dubai – the UAE’s largest – is using PureLine UV disinfection technology from Hanovia to disinfect water used in the milk production process. The UV system ensures the process is free from harmful bacteria such as E. Coli and Salmonella.

According to Mr Ashraf, Al Rawabi’s Site Engineer, two of the major benefits of the Hanovia UV system are the low operational and maintenance costs compared to alternative disinfection systems, and the fact that UV disinfection is a completely clean technology which does not produce any disinfection by-products or aftertaste, unlike with chlorine disinfection.

 Founded in 1989 with 500 Holstein and Friesian cattle, Al Rawabi now has 10,000 cows at its state of the art farm in Al Khawaneej. As well as distributing milk to over 9,000 outlets in the UAE, Al Rawabi also exports its products to Oman and Qatar. Animal welfare is a high priority for the dairy and all its animals are housed in special air conditioned units which protect them from the stifling summer heat. 


Thailand Dairy Producer Uses Hanovia UV To Replace Chlorine Water Treatment

UV Disinfection in Dairy ProductionThe Dairy Plus Co. Ltd. in Thailand has recently replaced its chlorine-based disinfection system with five PureLine PQ UV systems. Dairy Plus decided to reduce high levels of chlorine dosage throughout the process because it was proving ineffective at removing all microorganisms, particularly in the rainy season. It was also producing an after-taste in the product.  Find out more about this dairy's use of UV disinfection.


uv sterilisation of brewing process waterUsing UV Disinfection to Ensure Bio-security 

In an increasingly regulated and safety-conscious market producers have to meet ever more stringent standards on water quality and bio-security. UV is ideal for these applications as it is both effective and chemical-free. Bio-security is very important to understand from both the supplier and customer perspective. It is a fine balancing act between providing an appropriately-sized treatment system on the one hand while ensuring viable cost of ownership on the other. Read more about using UV Disinfection for Bio-Security...

UV Treatment of Water in the Food and Beverage Industries

In an increasingly regulated and safety-conscious market, the food and beverage industries have to meet ever more stringent standards of quality. Microbial growth due to contaminated water or ingredients can cause discolouration, off flavours and shortened shelf-life. The threat of contamination is further increased as manufacturers respond to demands for less chemical additives and preservatives. Effective microbial disinfection of the whole process is therefore essential. UV treatment of water is ideal for the food and beverage industries.

A non-chemical disinfection method which is gaining increasing acceptance is UV treatment of water. UV treatment of water kills all known spoilage microorganisms, including bacteria, viruses, yeasts and moulds (and their spores). It is a low maintenance, environmentally friendly technology which eliminates the need for chemical treatment while ensuring high levels of disinfection.

Benefits of UV Treatment of Water

UV treatment of water has many advantages over alternative methods. Unlike chemical treatment, UV treatment of water does not introduce toxins or residues into process water and does not alter the chemical composition, taste, odour or pH of the fluid being disinfected.

UV treatment of water can be used for primary water disinfection or as a back-up for other water purification methods such as carbon filtration, reverse osmosis or pasteurisation. As UV treatment of water has no residual effect, the best position for a treatment system is immediately prior to the point of use. This ensures incoming microbiological contaminants are destroyed and there is a minimal chance of post-treatment contamination.

Direct contact water

Although municipal water supplies are normally free from harmful or pathogenic microorganisms, this should not be assumed. In addition, water from private sources such as natural springs or boreholes could also be contaminated. Any water used as an ingredient in food or beverage products, or coming in direct contact with the product, can therefore be a source of contamination. UV treatment of water disinfects this water without chemicals or pasteurisation. It also allows the re-use of process water, saving money and improving productivity without risking the quality of the product.

CIP (Clean-in-Place) rinse  water

It is essential that the CIP final rinse water used to flush out foreign matter and disinfecting solutions is microbiologically safe. Fully automated UV treatment of water can be integrated with CIP rinse cycles to ensure final rinse water does not reintroduce microbiological contaminants. Because of their mechanical strength, MP lamps are not affected by any sudden changes in the temperature of the CIP water.

Filter disinfection

Stored reverse osmosis (RO) and granular activated carbon (GAC) filtrate is often used to filter process water, but can be a breeding ground for bacteria. UV treatment of water is an effective way of disinfecting both stored RO and GAC filtered water and has been used in the process industries for many years.


GAC filters are also often used to dechlorinate process water, removing the ‘off’ flavours often associated with chlorine disinfection, meaning the flavour of the final product remains untainted and free from unwanted flavours or odours. UV treatment of water ahead of GAC filters used for dechlorination improves the performance of the filters and results in longer carbon runs, so decreasing operating costs.

Sugar syrups

Sugar syrups can be a prime breeding ground for microorganisms. Although syrups with a very high sugar content do not support microbial growth, any dormant spores may become active after the syrup has been diluted. UV treatment of water , both syrup and dilution water prior to use will ensure any dormant microorganisms are deactivated.

UV treatment of wastewater

Effluent from beverage manufacturing facilities can be treated without the use of environmentally hazardous chemicals. This ensures all discharges meet with local environmental regulations. As already mentioned, because process water can be treated and re-used with the UV treatment of water this also leads to a significant reduction in the amount of waste water produced.

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