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SPN FEB 2012 WaterTreatment
www.swimmingpoolnews.co.uk
organics, the main reason of ‘burning in the eyes’ and the characteristic smell noticeable near swimming pools.
ESCO International offers over 30 standard UV systems including In-line MP UV (optionally ozone and AOP system) which have the ability to treat water flow rates of up to 1,400m3/h. The UV systems offer a selection of lamp technologies (medium-pressure, low-pressure Amalgam lamps) suitable for wide range of commercial and domestic pools and spas. The system can be supplied with manual or optional fully automatic cleaning system and, variable UV lamp power settings that can also be controlled by a user friendly control panel.
atg UV systems can certify a 99.9% ‘kill’ rate
chloramines more closely particularly in relation to possibility of the onset of asthma in children, skin sensitivity, and long-term poolside staff exposure. France and Belgium now require chloramines to be carefully controlled to less than 0.5ppm.
Chloramines don’t just give a pool the strong smell that irritates eyes, but are the main cause of human sensitivity to chlorine treated water. At 1.5 or 2.0ppm that many pools use as their target dose of chlorine, it is difficult for the human body to detect it. With many dosing systems not able to provide direct chloramine control, the characteristic smell and its corrosive effects continue.
There are, however alternatives open to pool owners whether for a domestic pool or the larger commercial pool where there is often pressure to find solutions which work within a limited budget.
The issue for commercial or local authority pools is to do with bigger pool loads where concerns about chlorine are at the highest and where there is sympathy and interest in UV systems, non or lower non-chlorine alternatives.
ATG CERTIFY THEIR SYSTEMS WILL HIT 99.9% ‘CRYPTO’ KILL RATES Many leisure operators are now installing UV systems as standard to ensure water does not pose a risk to public health.
Found in water supplies worldwide, cryptosporidium outbreaks are becoming more frequent, causing severe illness that can be fatal to vulnerable groups such as the young and elderly.
The problem is, whilst disinfection with chlorine effectively destroys other pathogens – it takes less than one minute to eradicate E. coli, and approximately 16 minutes to kill the hepatitis – cryptosporidium is virtually immune. Due to a
thick outer membrane, it takes more than 10 days to destroy the bug in a normal pool (25 degrees with free chlorine levels of 1ppm, a pH of 7.5 and no chlorine stabilisers) according to the US Centre of Disease Control.
UV specialists atg UV Technology has become the first manufacturer to have a UV disinfection system which offers independent validation for pools when it comes to testing water treatment. Testing was performed in accordance with the NSF/EPA ETV – Generic Protocol for Development of Test/Quality Assurance Plans for UV disinfection systems.
This allows atg to certify their systems will provide a 99.9% kill or greater of cryptosporidium in a single pass, whilst improving water and air quality to the reduction of problem chloramines. atg UV Technology has more systems validated to the US EPA UVGM standard than any other Medium Pressure UV System manufacturer. This provides atg UV Technology with the ability to offer independently tested UV systems that are future proof against regulations that could demand all systems used on swimming pools are required to be validated.
All atg UV Technology swimming pool systems come with UV intensity monitoring, automatic wipers systems, half to full power stepping, strainer baskets and atg UV’s leading SPECTRA Control panel as standard.
ESCO INTERNATIONAL OFFERS OVER 30 STANDARD UV SYSTEMS
UV systems have breached the market through providing the missing link in the disinfection system puzzle, as the treated water is free from the complete range of germicidal spectrum including cryptosporidium and giardiasis. Some of the chlorine used for disinfection interacts with ammonia and other organic nitrogen based substances to form chloramines and chloro-
Often high volume traffic in commercial pools can overpower the typical disinfection system, leading to higher chlorine dosing of pool water, increasing the risk of chloramines and chloro- organics and, subsequent dangers. ESCO International’s UV systems have been vigorously tested and, show they are reliable in successfully reducing the level of combined chlorine (chloramines) to below 0.2 ppm. The research showed that installing a UV system leads to lower free chlorine levels and the need to hyper- chlorinate the pool is less frequent, making pool operation more cost effective and safer.
TRIDENT MAKES STRIDES IN UV Certikin’s Trident™ ultraviolet has introduced the Series 1 Ultraviolet sanitation system. With features not found in any other commercial UV sanitation system, and convertibility from one lamp to four lamps, and low pressure high output UV technology, 13,000 hour lamp life makes it some of the UV industries easiest to operate, easiest to maintain, and most reliable UV systems. Suitable for indoor and outdoor operation, this small footprint UV system becomes an obvious choice for the user who demands the best.
“... installing a UV
system leads to lower free chlorine levels and the need to
hyper-chlorinate the pool is less frequent, making pool
operation more cost effective and safer”
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