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News Release from: Aquionics Inc | Subject: Poughkeepsie UV plant
Edited by the Processingtalk Editorial
Team on 15 September 2006
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%
The City of Poughkeepsie, New York, has always been on the cutting edge of water treatment technology - its first treatment plant, built in 1872, was the first successful slow sand filtration plant in America Today, the city continues its tradition of technical innovation with the installation of Aquionics UV disinfection equipment to treat the city's drinking water
This article was originally published on Processingtalk on 28 Jun 2006 at 8.00am (UK)
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The closed chamber, medium pressure systems provide high efficiency disinfection with online transmittance monitoring.
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 8MGD.
Prior to installing the Aquionics equipment in March of 2005, chlorination occurred in open settling basins, followed by filtration.
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Water supply by UV treatment with ultra-filtration
Thornton in Colorado has installed Aquionics closed chamber, medium pressure UV water disinfection systems to increase water treatment capacity and meet tightening water quality regulations
This process required relatively substantial chemical usage and produced significant disinfection byproducts.
With the addition of the Aquionics UV treatment equipment, the amount of chemicals consumed has been reduced, lowering disinfection by-products by 15-20%.
The resulting disinfection levels comply with the new guidelines of the Surface Water Treatment Rule issued by the EPA.
Six Aquionics Photon UV systems function in parallel to meet the desired disinfection levels.
The high efficiency, medium pressure closed channel design disinfects with fewer lamps than comparable low pressure, open channel 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.
A full validation of the Poughkeepsie system by HydroQual (of Mahwah, N.J) confirmed the predicted performance of the system.
"We considered alternative technologies to meet our goals," explained City of Poughkeepsie plant manager, Randy J Alstadt: "The relative cost, a compact size which fits into our existing facility, and the technical merit were deciding factors in choosing Aquionics equipment".
To keep maintenance low, the systems are equipped with an automatic cleaning mechanism to keep lamp sleeves free of organic deposits.
The units only require periodic replacement of the UV lamps, a simple operation that can be carried out by on-site staff.
Aquionics, a Halma Group Company, is the market leader in the manufacture, application and development of UV technology for progressive, non-chemical disinfection and microbiological control.
The company's systems are used in a wide variety of applications including wastewater treatment, pharmaceutical manufacture, food and beverage production, microelectronics, pool disinfection, and specialised industrial settings.
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