Product category:
Potable water, test and treatment
News Release from: Aquionics Inc | Subject: Poughkeepsie UV
Edited by the Processingtalk Editorial
Team on 18 January 2008
Three years of successful UV
disinfection in NY
It is now nearly three years since the Poughkeepsie Water Treatment Facility in New York state installed six Aquionics UV disinfection systems for drinking water treatment
In that time the closed chamber, medium pressure systems have been performing beyond expectations "We get approximately 5,000 hours of lamp life per UV system, but a few lamps have run for as long as 11,000 hours, which is excellent" commented Paul Lill, the facility plant manager: "This means we only have to change the lamps about once a year, reducing our running costs - always an important consideration"
This article was originally published on Processingtalk on 15 Sep 2006 at 8.00am (UK)
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Historic drinking water plant gets UV upgrade
The City of Poughkeepsie, New York, has installed an Aquionics medium pressure Photon UV disinfection system to treat the city's drinking water, reducing the disinfection by-products by 15-20%
UV disinfection for brewing and beverages
Microbial growth in beverages and beer products due to contaminated water supplies or sugar syrups can cause discolouration, off flavours and shortened shelf-life
Micro-organisms killed by medium UV stay dead
It is well known that bacteria and other micro-organisms contain enzymes that can repair UV-damaged DNA, a process known as 'reactivation'.
The Poughkeepsie Water Treatment Facility serves a community of nearly 80,000, drawing water from the Hudson River to meet an average daily demand of 10.5MGD.
Prior to installing the Aquionics equipment in March of 2005, chlorination was used in open settling basins, followed by filtration.
This process required substantial chemical usage and produced significant disinfection by-products.
With the addition of the Aquionics UV treatment equipment the amount of chlorine required for primary disinfection was significantly reduced, with a corresponding lowering of disinfection by-products by up to 20%.
Secondary, residual disinfection is provided by chloramines.
The resulting disinfection levels complied with the new guidelines of the Surface Water Treatment Rule issued by the EPA.
The six Aquionics UV systems are situated downstream of the filters and operate in parallel.
The medium pressure, closed channel design disinfects with far fewer lamps and with a much smaller footprint than comparable low pressure systems.
Each chamber is fitted with UV monitors to measure actual UV fluence and dose for record keeping.
With the addition of an optional on-line transmittance monitor, real time transmittance values are used to automatically adjust the dose pacing of the UV system.
"We originally considered alternative disinfection technologies to meet our goals," explained Lill.
"The units had a lower relative cost, a compact size which fits into our existing facility and their technical merit were all deciding factors in choosing Aquionics equipment".
To keep maintenance low, the systems are equipped with automatic cleaning mechanisms which keep the UV lamp sleeves free of organic deposits.
When the lamps need replacing, it is a simple operation that is carried out by on-site staff.
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