Water Disinfection Articles

  • The elimination of fecal coliforms and e. coli in lagoons

    Many horse racetracks throughout the world are designed to drain water from the track into a lagoon that is located in the infield of the track. Due to the track being predominantly used for horse racing, there is a high amount of fecal coliform, especially of the Escherichia coli species, bacteria in the water that drains from the track. During the racing season, fecal coliform and E. coli ...


    By Reliant Water Technologies

  • Case study - Lafourche Parish Louisiana Sheriff’s department work release program

    A number of years ago the Lafourche Parish Sheriff’s Department, State of Louisiana, instituted a new program to assist prisoners nearing release to transition back into society. This vehicle requires that inmates pay for their room and board while they learn work skills in industries, such as, shipbuilding, oil field services, food preparation, kitchen management and municipal ...


    By Reliant Water Technologies

  • Municipal Wastewater

    Municipal wastewater namely sewage is generated by residential, institutional, commercial and industrial establishments. It includes household waste liquid from toilets,baths,showers,kitchens, and sinks drained into sewers. In many areas, sewage also includes liquid waste from industry and commerce. The separation and draining of household waste into greywater and blackwater is becoming more ...


    By Horizon Water Co., Ltd.

  • Impact of surface maintenance on BioSand filter performance and flow

    The BioSand filter (BSF) is a household scaled, intermittently operated, slow sand filter. The BSF requires maintenance to remove trapped sediments. This study evaluated the effects of maintenance on the filter's flow rate and performance. Four concrete BSFs received three styles of maintenance: surface agitation (SA), stirring method (SM), and sand removal (SR). Effluent water was collected ...


    By IWA Publishing

  • Ferrrate(VI) and freeze-thaw treatment for oxidation of hormones and inactivation of fecal coliforms in sludge

    This study examined the individual and combined effects of potassium ferrate(VI) additions and freeze-thaw conditioning for the treatment and dewatering of wastewater sludge in cold climates, with particular focus on the inactivation of fecal coliforms and oxidation of estrogens, androgens, and progestogens. The first phase of the study evaluated the effects of potassium ferrate(VI) ...


    By IWA Publishing

  • Healthy Habits - Improving Wellbeing on a Work Schedule

    As we firmly embrace 2017 crashing into these strange new numbers head on, many of us will be facing the harsh reality of our New Year resolutions; perhaps – just perhaps – in many cases feeling like we’ve promised just a little more than we can deliver. Taking an educated guess, it’s safe to assume many people’s plans will consist of some effort to get back into ...


    By SHEilds Ltd

  • Build up a database to determine the management of drinking water in the Province of Cartago, Costa Rica

    In Costa Rica, the majority of people have drinking water in their homes, but because of climate change along with the increase of population and non-existent planning programs, the distribution of this resource could be affected. To ensure sustainability of drinking water, information on demand and supply is required. Unfortunately, the information is outdated and there is no single unified ...


    By IWA Publishing

  • Occurrence of heavy metals and contaminants on the surface of adjacent rivers

    Water is fundamental to the survival of living beings. It registers every impact and can function as an indicator of environmental stressors. Our objective in the current study was to assess the sanitary conditions of the waters in the Açude, Maria Lucinda and Santa Rosa streams. This was done by checking pH, running quantitative analyses of heavy metals and testing for total coliforms. The ...


    By IWA Publishing

  • Evaluation of DBPs formation from SMPs exposed to chlorine, chloramine and ozone

    Soluble microbial products (SMPs) are an important group of components in wastewater effluents. In this study, the formation of disinfection by-products (DBPs), including trihalomethanes (THMs), haloacetic acids (HAAs), chlorinated solvents (CSs), haloketones (HKs), haloacetonitriles (HANs) and trichloronitromethane (TCNM) (chloropicrin), from SMPs during chlorination, chloramination and ...


    By IWA Publishing

  • Ceramic pot filters lifetime study in coastal Guatemala

    Ceramic pot filters (CPFs) are an effective means of household water treatment, but the characterization of CPF lifetimes is ongoing. This paper describes a lifetime field study in Guatemala which was made possible by a collaboration between researchers, CPF-using households, and local non-governmental organizations (NGOs). Disinfection data were collected periodically for two years using ...


    By IWA Publishing

  • Healthy soil is essential to a circular economy

    To achieve the Dutch government's objective of realising a circular economy in the Netherlands, it is essential to maintain the productivity of the country's farmland. Healthy soil produces renewable raw materials for biobased products. However, declining carbon levels in arable Dutch soil is inhibiting our ability to meet this objective, and continued global warming is standing in the way of a ...

  • A comprehensive approach for diagnosing opportunities for improving the performance of a WWTP

    High quality services of wastewater treatment require a continuous assessment and improvement of the technical, environmental and economic performance. This paper demonstrates a comprehensive approach for benchmarking wastewater treatment plants (WWTPs), using performance indicators (PIs) and indices (PXs), in a ‘plan-do-check-act’ cycle routine driven by objectives. The performance objectives ...


    By IWA Publishing

  • Perfectly clean water without the use of chemicals - Waste Water - Case Study

    Wastewater treatment plant successfully cut down costs and environmental impact Thanks to the disinfectant system from Danish Clean Water, the Danish wastewater treatment plant Fredericia Spildevand is now saving yearly 75.000 € and reusing 70,000 m3 wastewater for cleaning – saving both money and drinking water. The employees at Fredericia Spildevand were quite ...

  • Perfectly clean water without the use of chemicals - Case Study

    Showers in indoor swimming pool was legionella-free without dangerous chemicals In the spring of 2012 dangerous legionella bacteria outbreak was found in the shower installation in Osby swimming hall in Sweden. Now the shower installation is completely legionella free, and secure the visitors against future outbreaks, by using a harmless and biodegradable liquid NEUTHOX. Each ...

  • Bacteria-free water - without the use of toxic chemicals - Case Study

    Aarhus University Hospital fought against Legionella bacteria – and won Legionella bacteria thrives in all hot-water supplies and Aarhus University Hospital, Risskov felt the problem firsthand. With the ECA generator from Danish Clean Water A/S they managed to significantly reduce the bacteria and thereby minimizing risks concerning Legionella. Virtually all hospitals, ...

  • Pilot-scale electrochemical disinfection of surface water: assessing disinfection by-product and free chlorine formation

    Electrochemical disinfection of surface water using mixed metal oxide anodes was evaluated in a pilot-scale demonstration. Disinfection rates, chlorine generation, energy demand, and generation of disinfection by-products were monitored over the 190-day study. Particular attention was given to the generation of trihalomethanes (THMs) and haloacetic acids (HAAs) during the electrochemical ...


    By IWA Publishing

  • Results of EPA OIG’s Review of EPA’s Antimicrobial Testing Program

    On September 19, 2016, the U.S. Environmental Protection Agency’s (EPA) Office of Inspector General (OIG) issued a report, EPA Needs a Risk-Based Strategy to Assure Continued Effectiveness of Hospital-Level Disinfectants, the result of OIG’s review of ...


    By Bergeson & Campbell, P.C.

  • Effect of feed type and other factors on soluble microbial product production and its disinfection byproduct formation during biological treatment of wastewater organics

    Soluble microbial products (SMPs) can act as a disinfection byproduct (DBP) precursor besides natural organic matter (NOM) when source water is polluted by biologically treated wastewater effluent that has SMPs as its main component. Influential factors of SMPs as a DBP precursor were investigated in this study. Model feed substrates were biologically incubated to simulate the biological ...


    By IWA Publishing

  • Importance of measuring UV transmittance (UVT) for UV disinfection

    UV disinfection systems disinfect water using UV light at the 254 nm wavelength. UV light at this wavelength actually destroys the DNA of microbiological material in the water which prevents dangerous viruses such as cryptosporidium and e-coli from reproducing and causing harm. UV Disinfection Dose and UV Transmittance (UVT) The effectiveness of a UV disinfection system is ...


    By Real Tech Inc.

  • Disinfection By-Products (DBP) Precursor Monitoring

    Chlorine has long been used as a primary disinfection method for many water and wastewater treatment applications. However, there is growing concern about the harmful DBP’s produced by the use of chlorine. DBP’s, such as triahalomethanes (THMs), can occur when the natural organic matter (NOM) that is present in the water is combined with chlorine. More specifically, the portion of ...


    By Real Tech Inc.

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