UV water treatment Articles

  • Influence of coagulant/lime dosing sequence on treatment of soft humic waters

    The influence of dosing sequence of lime and alum as a coagulant in the treatment of soft humic waters (requiring pre-alkalinisation of raw water) was studied. The experiments show that the traditional dosing order, i.e. pre-alkalinisation first and coagulant second, might give worse results in comparison with the reversed order, i.e. coagulant dosing followed by pre-alkalinisation. The ...


    By IWA Publishing

  • Self-Cleaning Filters for Pretreatment of Membrane and UV Water Treatment Systems

    The removal of suspended solids is necessary to protect membrane systems and prevent the “shadow effect” in ultraviolet (UV) treatment systems. Recent field data has shown the effectiveness of automatic self-cleaning filters in removing suspended solids down to less than 3 microns in size without flocculants, pre-coats or granulated media. Tests have demonstrated the complete removal of particles ...

  • Evaluation of model parameters for simulating TiO2 coated UV reactors

    A CFD-based model for simulating TiO2 coated photocatalytic reactors used in drinking water treatment applications was preliminarily evaluated. The model includes aspects of hydrodynamics, mass transfer, UV-radiation field, and surface chemical reactions. Appropriate models for each of the associated physicochemical phenomena were experimentally or analytically examined. Once defined and ...


    By IWA Publishing

  • The influence of reaction conditions in the oxidation of organic compounds of nuclear laundry water by ozone

    This paper presents a summary of degrading organic compounds of nuclear laundry water by ozonation in different conditions of pH, hydrogen peroxide and ultraviolet radiation. The degradation of organic compounds was analysed by chemical oxygen demand (COD), total organic carbon (TOC) and biochemical oxygen demand (BOD). The optimal degradation conditions were at pH 7 with ozone, UV radiation and ...


    By IWA Publishing

  • Sutton and East Surrey Water - Drinking Water UV Treatment - 5000m3/hr - Case Study

    atg UV Technology supplied Sutton & East Surrey Water with a US EPA UVDGM Validated solution using 3 x SX-1873-30 UV Systems. The Duty / Assist / Standby plant treats over 5,000 m3/hr of drinking water for a population of over 650,000 people, and has a redundancy of 10,000 m3/hr for future population ...


    By atg UV Technology

  • A Practical Solution for Real Time Organic Monitoring

    Monitoring organics continuously provides instantaneous water quality data that is vital for several of the most common water and wastewater treatment applications. Online organic water quality testing ensures that immediate action can be taken to establish proper treatment. real-time organic monitoring is invaluable  for optimizing and controlling coagulant dosing; monitoring ...


    By Real Tech Inc.

  • Quantification of polymer concentration in water using UV-Vis spectroscopy

    The goal of this study was to develop a method that uses UV-Vis spectroscopy for the determination of residual polymer concentration water and environmental samples. UV-Vis absorbance measurements are quick and simple and can be usefully applied in research and practice. Five different polymers exhibiting a wide range of polymer characteristics were tested in the UV range of 200–300 nm. ...


    By IWA Publishing

  • Quick laboratory analysis of gas condensate in produced water

    Abstract Often there is a need for quick field measurement of gas condensate concentration in produced water, such as when performing process optimization, water treatment verification and routine process monitoring. Rigorous laboratory analysis methods such as gravimetric oil and grease measurements or gas chromatographic methods are not sufficiently sensitive to process changes ...

  • Development of recreational water spray ground design regulations in New York State, an engineering approach

    The New York State Department of Health developed regulations for the design and operation of spray grounds to address the potential for recreational water illnesses associated with this type of venue. The water treatment component of the new regulation was based on a first-principles approach to address the unique challenges of spray grounds. The regulation departs from traditional ...


    By IWA Publishing

  • 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

  • FF System - Compact WWTP

    Our “FF System” is the perfect solution created by our engineers to guarantee a flexible and long lasting treatment unit which is ready use due to the fact that it is completely pre-assembled. This compact system includes all the required unit operations such as screening, dissolved air flotation, biological oxidation, sedimentation and UV disinfection. This is the best available ...


    By Panta Rei Srl

  • Enhanced UV Disinfection by Ozone/Peroxide a Study in Tampa, Florida

    The focus of this presentation is the use of oxidant(s) to enhance ultraviolet (UV) disinfection based on an ongoing project at Tampa’s Howard F. Curren Advanced Wastewater Treatment Plant (HFCAWTP). This approach is unique because it would be the first of its kind in Florida. Systemic bench-scale testing and on-site water quality measurements are used to evaluate the oxidant-enhanced UV ...

  • Out In the Ozone the Return of Ozone and the Hydroxyl Radical to Wastewater Disinfection

    The City of Phoenix is investigating the use of various disinfection technologies for its 91st Avenue wastewater treatment facility. Key to this investigation is the implementation of a UV system to meet State of Arizona, Class A+ disinfection requirements. During this evaluation, the range of alternatives was expanded to include ozonation and other advanced oxidation processes (AOP), to examine ...

  • Color removal from industrial wastewater with a novel coagulant flocculant formulation

    Abstract: Chemically enhanced wastewater treatment is attracting substantial interest among the currently employed chemical unit processes in wastewater treatment. Coagulation-flocculation has received considerable attention for yielding high pollutant removal, especially color removal. This investigation presents a novel formulation of coagulation-flocculation for color removal from industrial ...

  • Degradation and toxicity depletion of RB19 anthraquinone dye in water by ozone-based technologies

    This research investigated the discoloration and mineralization of Reactive Blue 19 (RB19) anthraquinone dye by single ozonation, single UV radiation and ozonation jointed with UV radiation (O3/UV). The problem was approached from two points of view: with the objective of color removal or the mineralization of solution. In each case, the optimum operating conditions were different. Ozonation ...


    By IWA Publishing

  • Use of Barley Straw for Algal Reduction in Sewage Lagoons – Operational Considerations

    Pecos began use of barley straw as a clarification aid in June 2005 to determine its effectiveness as part of a phased treatment plant replacement. Phase I includes construction of a new UV system that will disinfect effluent received directly from Lagoon No. 3. However, this phasing would place a heavy TSS loading on the UV system. As barley decomposes, a chemical is emitted that inhibits algal ...

  • Disinfection Along the Muddy MO…What Evil Lurks in these Waters?

    The Missouri Department of Natural Resources (MDNR) recently promulgated fecal coliform effluent limitations requiring disinfection of the effluent discharged to the Missouri River from municipal wastewater treatment plants (WWTPs). Three plants affected by these new regulations are the Birmingham, the Blue River, and the Westside WWTPs owned and operated by the City of Kansas City, Missouri ...

  • Urban wastewater reuse: a pilot plant experience

    The results of a preliminary verification of domestic wastewater reusability in L'Aquila (Italy) are reported. A Tertiary Treatment Pilot Plant (TTPP), rotary filtration and Ultraviolet (UV) Radiation disinfection, was added to an Urban WasteWater Treatment Plant (UWWTP) to test the compliance with water quality indicated for reuse by the enforced Italian regulation. The TTPP was managed varying ...


    By Inderscience Publishers

  • Degradation of propoxycarbazone-sodium with advanced oxidation processes

    The degradation of propoxycarbazone-sodium, an active component of commercial herbicide, in aqueous solution with ozone, UV photolysis and advanced oxidation processes: O3/UV, O3/UV/H2O2, H2O2/UV, and the Fenton process was studied. All these methods of degradation proved feasible. The kinetics of propoxycarbazone-sodium degradation in water followed the pseudo-first order equation for all ...


    By IWA Publishing

  • Pilot scale experiments on surface water treatment sequence including ozonation and adsorption processes

    The paper presents results of the experimental studies on combined ozonation and activated carbon adsorption processes at the Water Treatment Plant (WTP) at Cracow (Poland). The study focused on the selection of an appropriate location of an ozonation process within the treatment scheme and on the choice of activated carbon grade for adsorption. Analysis of process efficiency in the proposed ...


    By IWA Publishing

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