ultraviolet drinking water system Articles

  • Evaluating a composite cartridge for small system drinking water treatment

    A pilot-scale evaluation was conducted at the U.S Environmental Protection Agency (EPA) Test & Evaluation (T&E) Facility in Cincinnati, Ohio, on a multi-layer, cartridge-based system that combines physical filtration with carbon adsorption and ultraviolet (UV) light disinfection to serve as a home-base water treatment security device against accidental or intentional contaminant events. The ...


    By IWA Publishing

  • Is Ultraviolet Ultra Safe?

    With retailers under pressure to meet increasing health and safety standards, it’s no surprise that many of our food & products are coming into contact with Ultraviolet (UV) radiation which is gradually becoming common as a cost effective method of reducing or eliminating pathogens Ultraviolet wavelengths are classified into three general areas: UV-A, UV-B and UV-C. These can be used in ...


    By Alpha-Purify

  • Illuminating Ultraviolet Disinfection for High-Level Reuse in Florida

    Chlorine has been the mainstay of the wastewater disinfection industry for more than 100 years due to its effectiveness, low cost and availability. However, due to various problems associated with chlorine, the Hillsborough County, Florida Water Resource Services Department decided to replace the high-level reuse water chlorine gas disinfection system at the Valrico Advanced Wastewater Treatment ...

  • Types of Water Treatment Systems

    There are different types of water treatment systems, and knowing the difference between them can help you make an informed decision on just what type of treatment you’ll need for your water. There is no best water treatment system that will meet everyone’s needs—each system has its benefits and deficiencies. Here are a few ...

  • Fluorescent-conjugated MS2 as surrogates for viruses during drinking water treatment

    Microfiltration/ultrafiltration (MF/UF) membranes and ultraviolet (UV) light disinfection serve as attractive alternative technologies to aid utilities in complying with both the LT2ESWTR and Stage 2 D/DBP. However, both technologies are limited in their ability to remove viruses and at the same time there is a lack of methods to accurately demonstrate virus removal in full-scale settings. In ...


    By IWA Publishing

  • Supply system factors associated with microbiological drinking water safety in regional New South Wales, Australia, 2001–2007

    Aim: To determine factors associated with microbiological safety of public drinking water systems in regional New South Wales (NSW), Australia. Method: We analysed 107,000 end-user drinking water samples for an association between detection of Escherichia coli and drinking water system features, sample year and season using NSW Health Drinking Water Monitoring Program data, 2001–2007. We used ...


    By IWA Publishing

  • Sensor Setpoint Validation of Reclaimed Water UV Reactors

    ABSTRACTReclaimed water ultraviolet light (UV) disinfection system can be a critical component of a multiple barrier approach for public health protection. Current control methodologies rely upon assumed end of lamp life factors and sleeve fouling factors, which often result in overdosing when the lamps are new and the sleeves are clean and underdosing as the lamps ...

  • Evaluating the efficacy of pre-oxidation for enhancing removal of HAA5 precursors by conventional drinking water treatment

    The formation potentials of five haloacetic acids (HAA5FP) in 13 surface water samples taken from eight cities from northeast to south China were evaluated using the simulated distribution system (SDS) chlorination method. These samples showed a wide range of HAA5FP levels (20 to 443▒μg▒L−1). Four pre-oxidation methods were evaluated for their performance in enhancing HAA5FP removal from six ...


    By IWA Publishing

  • US EPA UVGDM 2006 validated UV systems

    As micro-organisms evolve, so too does their resistance against traditional methods of treatment. atg UV has developed a range of validated systems that fully comply with the requirements of the US EPA 2006 UVDGM (worlds' strictest validation standard).  atg UV Technology has a range of UV systems that have been designed specifically for the drinking water industry, and are fully compliant ...


    By atg UV Technology

  • The Alamitos Barrier Recycled Water Project

    Groundwater pumping in the Los Alamitos, California area over the last century has caused groundwater levels to drop, allowing seawater to intrude into the local groundwater aquifer. To prevent additional infiltration by seawater, a coastline barrier of wells injecting fresh water has been in place since 1965. Until recently, imported potable drinking water was injected into the aquifer. However, ...

  • Scale-up of a Medium Pressure UV System for the Treatment of N-Nitrosodimethylamine (NDMA) and its Advantages Over Low Pressure UV Systems

    Recently there has been considerable concern in California about the detection of N-nitrosodimethylamine (NDMA) in drinking water at levels as high as 900 ppt. NDMA was found to be a carcinogen in animals and assessed as a Class 1 carcinogen. It is currently listed as a priority pollutant on the US EPA National Priorities List. California has set an 'action level' of 20 ppt for NDMA. NDMA is ...

  • Biodosimetry of a full-scale uv disinfection system to achieve regulatory approval for wastewater reuse

    In order to respond to the stringent disinfection requirements for reclaimed wastewater in the United States, Ozonia North America (ONA) undertook a bioassay validation study of a lowpressure nvery high-output (LPVHO) ultraviolet (UV) disinfection system. The disinfection performance of this process technology was verified via biodosimetry in accordance with the Ultraviolet Disinfection ...

  • UV LEDs making waves with clean water

    Oxford Instruments systems now facilitate water purification technology With World Earth Day last week I’ve decided to make this weeks blog about how new technology is being used to enhance people’s lives in a fundamental way. The UN recognises that clean drinking water is a global issue with over ...


    By Oxford Instruments plc

  • Validation & DWI guidelines. your questions answered at IWEX

    With atg UV systems treating in excess of 2000 m3/hr daily, Ultraviolet disinfection is no longer an ‘emerging' technology. atg UV Technology will be attending IWEX 2010, (Stand ENW3) and in addition to exhibiting their wide selection of conventional UV disinfection systems and services, technical experts will be on hand to discuss the developments in both UV technology, the subsequent ...


    By atg UV Technology

  • Effect of water hardness and pipe material on enhanced disinfection with UV light and chlorine

    Limited studies have been conducted to evaluate synergistic benefits between disinfectants, although promise has been shown between ultraviolet (UV) light and chlorine-based disinfectants. This research aimed to determine drinking water quality factors that affect potential for enhanced removal of heterotrophic bacteria due to synergy between UV light and free chlorine. An additional goal was to ...


    By IWA Publishing

  • Water Utilities - Potable Water Treatment - Case Study

    Project Title - Hall Water Treatment Works Client - GTM JV / Anglian Water Project Value - £350K Chemical - Hydrogen Peroxide 50% Duration - 18 months Our Services ...


    By WES Limited

  • Surface Water Monitoring - Case Study

    Safe operation of a Water Treatment Plant (WTP) requires careful monitoring of the water supply influent to the plant, as a guard for any substances entering the treatment works that could negatively impact treated water quality in the distribution system. One aspect of water quality that has recently garnered more attention from authorities and utilities is Natural Organic Matter (NOM), which ...


    By MANTECH Inc.

  • A computational fluid dynamics analysis of placing UV reactors in series

    Ultraviolet (UV) light water treatment reactors are commonly used in both wastewater and drinking water disinfection. UV technology can effectively inactivate a large number of pathogens at low UV doses, however adenovirus requires a substantially higher dose than most pathogens of interest. In order to meet adenovirus inactivation requirements, UV reactors are often placed in series and the ...


    By IWA Publishing

  • Grab the best wastewater treatment service provider

    The hazardous organic wastes are immensely increasing by industries, militaries as well as by the domestic sources. It is an emerging issue in the recent days and needs immediate actions by government or by any private organization. To reduce the effects of the hazardous waste from the environment, the advanced oxidation process is considered as an efficient technique that helps in removing ...

  • Closed-vessel vs.open channel - Case Study

    Ultraviolet disinfection is now a standard feature in most waste water treatment systems. UV has also been adopted by the drinking water community, as a barrier against the chlorine tolerant species such as Cryptosporidium and Giardia. The technology is widely favoured due to its non-chemical nature, the fact that no subsequent de-chlorination process is required, and its ability to be ...


    By atg UV Technology

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