Prestigious American School Chooses UV To Treat Its Pool Water

Since a Hanovia UV system was installed to treat pool water at the prestigious Germantown Academy in Pennsylvania, USA, athletes who normally used inhalers because of chlorine by-products no longer need them.

Germantown Academy pool

According to the swimming coach Richard Shoulberg, trainer of over 15 Olympic swimmers, “Many of our athletes were having respiratory problems due to the heavily chlorinated water and I felt I had to do something. I secretly had the Hanovia UV system installed without telling the athletes and the results have been amazing. The athletes stopped needing inhalers as the atmosphere around the pool was suddenly much better, with none of the throat and eye irritations or unpleasant smells commonly associated with indoor chlorinated pools.”

UV works by destroying chloramines (also known as combined chlorines), which are a by-product of chlorination and are responsible for these unwanted side-effects. Chloramines are also corrosive and can damage the infrastructure of indoor pools. An additional benefit of UV is that it is highly effective at destroying microorganisms such as bacteria and viruses present in pool water.

“In Pennsylvania we still have to use chlorine, even with UV, but this can now be kept to the lowest possible level,” continued Shoulberg. “On a normal day our six lane, 25 metre pool has a bather load of 360 people, but for eight weeks in the summer this rises to over 750 a day. The Hanovia system has no problem dealing with these loads. It is also virtually maintenance free – we have only had to change the UV lamp once since it was installed three years ago.”

“I would be happy to recommend UV to anyone. It helps the environment by reducing our reliance on chemicals and also preserves the fabric of the building. I am so impressed with the Hanovia system that I’ve recommended to our pool contractors that they include UV in any proposals for new pools.”

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Somali Bottling Plant Chooses UV Disinfection

To disinfect product water before the addition of syrups and flavouring, Hanovia has supplied a UV disinfection system to the United Bottling Company’s new plant in Mogadishu, Somalia. The low pressure UV system treats a flow of 17m3/hour of reverse osmosis permeate.

United Bottling Plant, Somalia

“The robustness and reliability of the Hanovia equipment was an important factor in our choice of UV system,” said Mr Abdirisak Isse, founder and partner of the Company.

The plant bottles Coca Cola, Fanta and Sprite under licence for distribution to the Somali market. A 100% Somali-owned operation, it was built against difficult odds in the strife-torn city which has no police and no insurance – only gun law. The original factory was destroyed in the war that took place in the 1990s.

“We employ over 150 people at the factory, with another 70 finding jobs as distributors,” added Mr Isse. “We currently produce 36, 000 bottles of soft drinks per hour, with the Hanovia UV system playing a vital role in ensuring hygiene and quality standards remain high.” He went on to explain that the Company relies on the self-interest of local Somalis to protect the plant by drawing in partners from as wide a range of communities as possible.

By permanently killing bacteria, viruses and moulds, UV ensures process water is free from spoilage or potentially pathogenic microorganisms. It is a completely clean technology which leaves no taint and has no effect on the taste, colour or odour of the product. It can be used as the main disinfection system, as a back-up to alternative methods, or in specific clean-room environments where high standards of sterility must be maintained.

Hanovia has over 80 years’ experience in the manufacture, application and development of UV technology for non-chemical disinfection and microbiological control. For more information please visit the company’s website at

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Silver Spring Stays Pure With UV Disinfection

Hanovia ultraviolet (UV) water disinfection systems are helping the Silver Spring Mineral Water Company in Folkestone ensure its products are free from microbial contamination.

Silver Spring

“We have a very pure source of spring water,” said Steve Clegg of the engineering team, “but we feel a ‘take no chances’ approach to water purity is best, and UV provides us with that extra reassurance,”. This was reiterated by quality assurance manager Sue Hickling, who said, “UV gives us a high level of confidence to ensure consumer protection and satisfaction.”

UV is highly effective at destroying all water-borne microorganisms, including bacteria, yeasts, moulds and their spores. It does not affect the pH or chemical composition of the product, ensuring the flavour is not affected. Each UV system consists of a stainless steel treatment chamber containing one or more UV-emitting tubes. Water passes through the chamber and the UV kills any microorganisms present by destroying their DNA.

Seven Hanovia UV units are now installed at Silver Spring, the oldest of which has been in use for over ten years. “We use UV on all our bottling lines and also for our mains water supply,” said company trainer Jason Crockford.

Spring water in the Folkestone area is very hard and can cause a build-up of lime deposits on the UV tubes. “Because of this we installed Hanovia manual arc tube wipers and since then the problem has virtually disappeared,”  added Jason.

Silver Spring supplies spring water and own-brand soft drinks to the major British supermarkets. “We have to ensure our product is of the highest standard; Hanovia UV disinfection certainly plays an important part in this,” said Steve.

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Exclusive Italian Golf Club And Spa Chooses UV For Pool Water Disinfection

To achieve optimum water disinfection without the unpleasant smells and eye irritations associated with chlorination, the exclusive Riviera Golf Club in Italy has installed a Hanovia UV disinfection system to treat its 80m3 indoor swimming pool and adjoining spa.

Riviera Golf Club, Italy

The UV system treats 30m3 water/hour, continuously running, with the subsequent injection of 50mg/l of liquid active oxygen. The rules regarding water treatment at private resorts in Italy are different to those for public pools, which still require a small amount of residual chlorination after UV treatment.

The entire treatment system was installed and commissioned by Hanovia’s Italian distributor, Acquatecnica S.r.l.

“Since installation the UV system has been working exactly as predicted and the client is very satisfied with the results,” commented Sergio Morelli of Acquatecnica. “The is no odour and the water is very clear,” he added.

Hanovia UV disinfection systems are compact and can usually be installed within existing pipework. An automatic wiper keeps the sleeves housing the UV lamps clean, so the only regular maintenance required is changing the UV lamps every six to nine months – a simple operation that can easily be carried out by on-site staff.

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The Benefits Of UV Disinfection In The Meat And Poultry Industries

Control of microbial contamination is always a high priority in the meat and poultry industries. Driven by ever higher quality standards, many operators now use ultraviolet (UV) disinfection technology to help them meet these standards. UV is highly effective against virtually all microorganisms, including bacteria, yeasts, moulds and viruses. It is simple to operate and completely non-intrusive, using no chemicals of any sort and having no effect on the texture, taste or odour of the material being treated.

UV for meat & poultry industries

There are many requirements for Hanovia UV systems in the meat and poultry industries. One of the most important is the inactivation of Cryptosporidium and other harmful bacteria in mains water used for product make-up, rinse and chill. Cryptosporidium is resistant to chlorine disinfection, but recent independent tests have shown UV to be very efficient at destroying it (1). UV systems are also effective at disinfecting meat marinades and brines, potential breeding grounds for bacteria and moulds due to their high nutrient content.

Another UV requirement is the disinfection of water used for feed make-up in poultry houses and other livestock feeding areas. Contamination of the water can adversely affect growers’ feed conversion ratios, but installing a small UV unit is a simple and effective way of ensuring the water is pathogen-free.

Surface disinfection is another area where UV comes into its own. Simple UV tunnels can be installed on existing process lines to disinfect meat, poultry or eggs prior to packaging, or before they are transferred to High Care areas. Surface disinfection systems are also ideal for sterilising food handling utensils, conveyor belts and packaging materials.

UV is also extremely effective at removing airborne spoilage organisms and pathogens carried by air conditioning and ventilation systems. Compact and easy to install within existing ductwork, Hanovia air treatment systems are silent in operation and can treat up to 4m3/second of air per lamp. They are virtually maintenance-free, the only regular requirement being the replacement of the UV lamp twice a year, a simple operation that can be carried out by general maintenance staff.

Outside the processing and packaging environment, UV is now also finding increasing acceptance as an effective and economic way of disinfecting effluent and wastewater prior to discharge. It even allows wastewater to be recycled and re-used as process water, with obvious cost savings for operators.

1. Clancy et al, 2000. ‘Using UV to inactivate Cryptosporidium’. Journal AWWA, 92(9), 97-104.

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UV Treated Water Keeps Swimmers Happy At Cotgrave Leisure Centre

Since opening in 1998, the Cotgrave Leisure Centre near Nottingham has used UV to treat the water in its indoor pool. The technology has been so successful that the centre’s assistant operations manager contacted Hanovia to tell the company how pleased he was.

Hanovia UV system at Cotgrave Leisure Centre

“I’m really happy the centre decided to install UV right from the start,” said Neil Gallagher. “We use it for primary disinfection, with 1ppm chlorine added for residual disinfection. We could probably go lower than this, but we prefer to keep it at 1ppm, especially at busy times, as part of our ‘belt and braces’ approach to hygiene.”

Continuing, Neil said, “With UV, the pool water is much clearer than if we were using chlorine on its own. Also, because UV destroys any chloramines (combined chlorines) produced by the residual chlorination, the atmosphere around the pool is better, with none of the unwelcome smells or eye irritations normally associated with indoor pools. People often comment on it, and it has even become a bit of a selling point for the pool. I definitely think UV is the way forward.”

Further evidence of the advantages of UV is provided by a recent study in Belgium linking chloramines in indoor swimming pools with childhood asthma (1). The problem is potentially so serious that the researchers said pool operators should seriously consider reducing the amount of chlorine they use. While further research is needed, those operators with any doubts about the long-term health effects of chloramines may wish to consider UV as a viable, cost effective solution.

The unit installed at Cotgrave is a Hanovia medium pressure PSP UV system, which can treat up to 288 m3/hour, based on a UV dose of 60 mJ/cm2. An automatic wiper keeps the sleeve housing the UV lamp clean, so the only regular maintenance required is changing the lamp every six to nine months – a simple operation that is carried out by on-site staff. All Hanovia UV disinfection systems are compact and can usually be installed within existing pipework with minimal disruption.

Cotgrave’s main pool is 25 by eight meters, with a sizeable shallow side pool and beach area for children and families. There is also a 35m flume ride, which twists its way down to an aqua catch. The centre offers a mix of everything from casual public swimming to life saving and sub-aqua classes.

1. Bernard, A., Carbonnelle, S., Michel, O., Higuet, S., de Burbure, C., Buchet, J-P., Hermans, C., Dumont, X., and Doyle, I. (2003). Lung hyperpermeability and asthma prevalence in schoolchildren: unexpected associations with the attendance at indoor chlorinated swimming pools. Occupational & Environmental Medicine, 60, 385-394.

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The Benefits Of UV Disinfection In The Beverage Industry

Microbial growth in beverages due to contaminated water supplies or sugar syrups can cause discolouration, off flavours and shortened shelf-life. The threat of contamination is further increased as manufacturers respond to consumer demands for less chemical additives and preservatives. Effective microbial disinfection of the whole manufacturing process is therefore essential.

UV disinfection system for the beverage industry

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

UV disinfection has many advantages over alternative methods. Unlike chemical treatment, UV 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. This feature is especially important in the beverage industry where the chemical dosing of incoming process water can cause off-flavours and alter the chemical properties of the product.

Hanovia UV systems can be used for primary water or sugar syrup disinfection or as a back-up for other purification methods such as carbon filtration, reverse osmosis or pasteurisation. As UV 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.

All Hanovia UV disinfection systems are easy to install, with minimum disruption to the plant. They need very little maintenance, the only requirement being replacement of the UV lamps every 12 months, depending on use. This is a simple operation that takes only a few minutes and can be carried out by general maintenance staff.

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‘Vegetable Garden Of Europe’ Irrigated With UV-Treated Effluent

In one of the first schemes of its kind in Europe, Hanovia ultraviolet (UV) technology is being used to treat municipal effluent for irrigating crops in the arid Murcia region of Spain.

UV system for effluent re-use

Murcia has a unique microclimate which allows fruit and vegetables to be grown all year round, giving the area its popular name ‘the vegetable garden of Europe’. Because of its unusual geography, however, the region has very low rainfall, meaning that irrigation water is extremely scarce. For this reason effluent is now being used for watering crops.

“The effluent supply is gravity-fed, so the disinfection system is very susceptible to pressure loss,” explained Hanovia’s Spanish distributor. “Hanovia’s medium pressure UV technology was therefore a deciding factor in the choice of treatment system, as the low number of UV lamps in each chamber offers less resistance to fluid flow, resulting in lower overall head loss. Medium pressure technology also results in energy and component savings for the system operators and is more reliable at permanently destroying microorganisms,” he added.

The installation consists of three Hanovia medium pressure UV treatment chambers installed in series. They treat a combined effluent volume of 500m3/hour and are normally running 16 hours per day, although they can operate 24 hours a day if required.

Commenting on the project, Craig Howarth, Hanovia’s Managing Director, said, “The Murcia project once again demonstrates Hanovia’s ability to provide custom-designed solutions for specific disinfection problems.”

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Slovakian Water Park & Spa Opts For UV Disinfection

Aqua City, a major new water park and spa resort in Slovakia, has chosen Hanovia UV systems to treat the water in its geothermal pools. Hanovia UV also treats the water for a decorative fountain. “We chose UV because research shows it to be the most effective and economical way of ensuring our water is free from harmful pathogens,” said Aqua City’s managing director Jan Telensky, who is the main financier of the resort. “In addition, UV also maintains the natural minerals in the water,” he added.

Hanovia UV system at Aqua City, Slovakia

The geothermal, mineral-rich water is drawn from a vast underground lake 1, 600 metres below the Earth’s surface. Although pure, the water is treated with UV as a precaution to ensure no microorganisms are present. UV destroys 99.99% of all known water-borne microorganisms, including Cryptosporidium and its spores, which are known to be chlorine-resistant.

“We are extremely happy with the way the Hanovia UV systems are working,” added Mr Telensky. “They are easy to operate and maintain and give us peace of mind, knowing that our visitors are enjoying water that is completely pure.”

UV is a harmless, non-toxic, low maintenance technology that is highly effective at treating water for optimum quality. Hanovia UV disinfection systems are compact and can usually be installed within existing pipework with minimal disruption or down-time. Operation and maintenance is simple and can easily be carried out by on-site staff. Because UV reduces the need for chlorination, it also helps to reduce costs.

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Hanovia UV Chloramine Destruction System For Pools Gets French Approval

Hanovia Limited, a world leader in ultraviolet (UV) water treatment technology, has received approval from the French General Health Directorate for its UV dechloramination system for swimming pools. Hanovia is the first non-French company to gain this recognition, and its UV systems are now on the list of approved processes for chloramine destruction.

Hanovia UV system for pool water treatment

Chloramines are formed by the reaction of chlorine in pool water with organic substances – such as sweat and urine – introduced by bathers. They are a major problem in modern high-load indoor recreation pools, most of which are not effectively ventilated. The chloramines linger in the air and cause eye and respiratory irritations.

UV is highly efficient at destroying these unwanted compounds, bringing an immediate improvement to the poolside environment. It is also a powerful disinfectant, destroying any chlorine-resistant microorganisms like bacteria and viruses in the water.

Hanovia has now been installing UV systems in swimming pools across the world for 10 years. To date it has delivered over 800 such systems in countries ranging from France, Spain, Portugal, Norway and Slovakia to the USA, Singapore, Australia and New Zealand.

All Hanovia UV systems are compact and can usually be installed within existing pipework with minimal disruption. Operation and maintenance is simple and can easily be carried out by on-site staff.

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