water disinfection Articles

  • Sequential chlorination for reclaimed water disinfection

    ABSTRACT The Sanitation Districts of Los Angeles County (Districts) operate seven tertiary water reclamation plants (WRPs) with a combined treatment capacity of approximately 200 million gallons per day (MGD). Chloramination is used at these WRPs for effluent disinfection. It was recently discovered that chloramination results in formation of N-nitrosodimethylamine (NDMA), a compound with ...

  • UV technology - unique in water disinfection

    Due to its undisputable Success &  Efficiency in destroying Cryptosporidium and Combined Chlorine, The Centers for Disease Control and Prevention Recommend installing UV Systems It has taken many years of testing to convince the pool market that the most reliable and best available option for treating and disinfecting water is through using Ultraviolet (UV) technology. UV systems ...


    By ESCO International (EI)

  • A comparison of disinfection performance and cost for various process combinations to disinfect reclaimed water

    For reclaimed water disinfection, pathogen reduction to acceptable public health risk levels is the primary objective. A second emerging objective is the ability to destroy trace pollutants (endocrine disrupters (EDCs), pharmaceutically active compounds (PhACs)) at a reasonably low cost. The WateReuse Foundation’s Innovative Reclaimed Water Treatment Project (WRF 02-009) is searching for ...

  • J555 gasless disinfection

    Detailed design, works manufacture and site installation of Sodium Hypochlorite dosing systems for conversion of 6 sites from Chlorine gas to liquid Sodium Hypochlorite Client: MWH Area: Hertfordshire WES Ltd were involved from early on in the project design stage in developing new Sodium Hypochlorite and Sodium Bisulphite dosing systems for Three Valleys ...


    By WES Ltd / Weschem Ltd

  • Selling UV disinfection systems

    A potential customer has inquired about employing your services to install a UV disinfection system. You set up an appointment for an estimate and to determine what will be involved for the installation. As the customer looks on, you turn on the Real UVT meter and proceed to test a sample of their water. Within a couple of minutes your Real UVT meter has provided you with the UV percent ...


    By Real Tech Inc.

  • Solar disinfection of natural waters with modified solar concentrators

    Solar water disinfection is a proven method for household purification of drinking water. Compound parabolic collectors (CPCs) have been used to enhance the inactivation rate of microorganisms. In the present study, a modified CPC with a higher concentration ratio of 1.1 was employed to further speed up the process. A large number of tests were conducted with water samples collected from ...


    By IWA Publishing

  • Feasibility assessment of surface water disinfection by ultrafiltration

    Ultrafiltration (UF) has been presented as an alternative to chemical disinfection to obtain safe drinking water, for its ability to remove microbiological contamination. Hollow-fiber UF membranes are designed as an effective barrier to microorganisms, for their high manufacturing integrity and for the ‘potting’ method adopted to seal fibers to the feeding/extraction manifold. ...


    By IWA Publishing

  • Disinfection by-product occurrence in selected European waters

    In this paper we report the findings of a European survey of regulated and emerging disinfection by-products (DBPs) in drinking waters in selected regions that were part of epidemiology studies. The levels of DBPs found reflected the diverse regions from which the samples were collected, the different treatment/disinfection processes and the different source waters. In addition to a wide range ...


    By IWA Publishing

  • Health effects of disinfection by-products in Australian drinking waters

    The disinfection of drinking water has greatly diminished the occurrence of diseases known to be caused by water-borne pathogens, but technological advances subsequent to the initial discovery of chloroform in 1974 have enabled the identification of a plethora of Disinfection By-Products (DBPs), particularly trihalomethanes (THMs), that may have injurious health effects on humans. DBPs are widely ...


    By Inderscience Publishers

  • Genotoxicity and effects of nanosilver contamination in drinking water disinfection

    This study was conducted to examine the genotoxicity and the influence of silver nanoparticles (AgNPs) contamination when drinking water is exposed to five different disinfection treatments: chlorine, chlorine dioxide, ozone, ozone/chlorine and ozone/chlorine dioxide. Experiments were conducted with water samples of different chemical composition, from three water supply systems in Croatia. ...


    By IWA Publishing

  • Effects of tap water processing on the concentration of disinfection by-products

    Aim: This study examined the effects on disinfection by-product (DBP) concentrations of common household methods for processing drinking water.Methods: We investigated the effects of refrigerator storage, jug filtering, boiling in an electric kettle, and supply from an instant boiling water unit, with or without filtering, on four species of trihalomethanes (THMs) and nine species of haloacetic ...


    By IWA Publishing

  • Effectiveness and Kinetics of Ferrate as a Disinfectant for Ballast Water

    The objective of the study was to determine whether ferrate could meet the international standards for successful ballast water treatment, including final concentrations of less than 1 CFU/ml of Enterococci, less than 2.5 CFUs/ml of Escherichia coli, and less than 1 CFU/100 mls of Vibrio cholerae. Pure cultures of Escherichia coli, Klebsiella pneumoniae, and V. cholerae, and a mixed culture of ...

  • New DWI guidelines for UV drinking water disinfection

    atg UV, has seen increasing interest in the application of UV systems for the treatment of drinking water applications since the UK Drinking Water Inspectorate (DWI) released their ‘Guidance on the use of Ultraviolet (UV) Irradiation for the Disinfection of Public Water Supplies' February 2010. With systems treating in excess of 2000 m3/hr daily, Ultraviolet disinfection is no longer an ...


    By atg UV Technology

  • Emerging Trends In UV Disinfection For Water Treatment

    Introduction The UV disinfection industry has experienced tremendous growth over the last 20 years.  The development of new UV technologies over this period has been a perfect example of an industry investing to meet market demand – in this case demand for an effective, low cost, and environmentally friendly disinfection technology.  The acceptance of UV disinfection at water plants ...

  • Computational modeling of ultraviolet disinfection

    The efficient design of ultraviolet light (UV) systems for water and wastewater treatment requires detailed knowledge of the patterns of fluid motion that occur in the disinfection channel. This knowledge is increasingly being obtained using Computational Fluid Dynamics (CFD) software packages that solve the equations governing turbulent fluid-flow motion. In this work, we present predictions of ...


    By IWA Publishing

  • Development and evaluation of a small scale water disinfection system

    Provision of microbiologically safe drinking water for people living in the rural areas of developing countries remains a major challenge to date. A simple gravity-driven membrane point of use system was developed based on woven fabric microfiltration (WFMF) membranes. The WFMF is a loose type of membrane (0.45 μm). However, complete disinfection is not achieved with the WFMF, hence it was ...


    By IWA Publishing

  • Chemistry of Chlorine Application and Production for the Disinfection of Water and Wastewater

     ABSTRACT A thorough understanding of chlorine and sodium hypochlorite chemistry is essential in optimizing their usage in disinfection of water and wastewater. High price of both chemicals and hazards involved in their transportation to plant sites have prompted many utilities to consider generation of these chemical on-site. A detailed discussion of the critical engineering concepts ...

  • Supreme hotel relies on supreme water disinfection by Grundfos

    Kempinski Hotel Zografski is a 5-star hotel located in Lozenets, near downtown Sofia, Bulgaria. It is one of the most luxurious hotels in the capital of Bulgaria. It has 442 guest rooms, 10 conference rooms, 5 restaurants, 3 bars and the only Japanese garden in the Balkans. The hotel was built between 1974 and 1979 to the design of leading Japanese architect Kisho Kurokawa (1934 - 2007) in the ...


  • Electrochemically activated water as an alternative to chlorine for decentralized disinfection

    Electrochemically activated (ECA) water is being extensively studied and considered as an alternative to chlorine for disinfection. Some researchers claim that ECA is by and large a chlorine solution, while others claim the presence of reactive oxygen species such as ozone and hydroxyl radicals in addition to chlorine. This study compares sodium hypochlorite (NaOCl) and ECA in terms of ...


    By IWA Publishing

  • Treating Taste & Odor and Disinfecting Drinking Water with UV

    Cornwall is a city of nearly 60,000 people in Ontario, Canada. It is located on the St. Lawrence River, approximately 1,700 km from the Atlantic Ocean and 2,000 km from Lake Ontario. The city draws its drinking water from the St. Lawrence, a reliable and generally good-quality source. However, in the late summer and early fall, dying algae from algae blooms during the warmest months often ...

Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you