biological contaminant Articles

  • Effects of UVGI filtration on indoor air contaminants and HVAC systems

    Proprietary High Intensity UVC (Germicidal 254 nm) Mercury Vapor Quartz Lamps designed to prevent and destroy mold and other microbial growth on the A/C coil and eliminate biological contaminants and chemicals in the air. Ultraviolet light destroy biological & chemical contaminants TOMIES proprietary High-Intensity Mercury Vapor Quartz Lamps produce UVC and UVV (both ...

  • Distillation treatment and removal of contaminants from drinking water

    Distillation treatment typically removes most of the dissolved materials. In addition, the boiling process kills biological contaminants. Nevertheless, there are certain volatile and semi-volatile organic compounds that may not be removed by distillation (CDPH 2009). Organic compounds that boil at temperatures greater than the boiling point of water (some pesticides) can be effectively removed ...


    By IWA Publishing

  • Large-scale solar sludge drying in Managua/Nicaragua

    Within the framework of a programme aimed at reducing the biological contamination of Lake Managua, a central wastewater treatment plant for the city of Managua (1.1 million p. e.) was constructed and commissioned at the end of 2009. Annual sludge production amounts to 26,000 m3 and sludge disposal and/or reuse thus present a major challenge. Based on the results of extensive studies, the ...


    By IST-Anlagenbau GmbH

  • Linking field‐based metabolomics and chemical analyses to prioritize contaminants of emerging concern in the Great Lakes basin

    The ability to focus on the most biologically relevant contaminants affecting aquatic ecosystems can be challenging because toxicity assessment programs have not kept pace with the growing number of contaminants requiring testing. Because it has proven effective in assessing biological impacts of potentially toxic contaminants, profiling of endogenous metabolites (metabolomics) may help screen ...


    By John Wiley & Sons, Ltd.

  • Fecal contamination and Microcystis in drinking-water sources of rural Cambodia using PCR and culture-based methods

    Rural communities within low-income countries frequently rely on a range of drinking-water sources, and each water source varies in its potential for biological contamination. The extent and source of biological contamination in primary drinking sources within Kien Svay, Kandal, Cambodia, were determined by fecal indicator bacteria (FIB) measurements, 16S rDNA genetic markers for human and ...


    By IWA Publishing

  • Nanotechnology in water treatment: an emerging trend

    With advances in nanotechnology, different types of nanomaterial are emerging for applications in water purification and water treatment devices owing to their effectiveness against both chemical and biological contaminants. This paper discusses the application of nanoscale materials that are being evaluated or developed as functional materials for water treatment, e.g. nanomembranes ...


    By Inderscience Publishers

  • 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

  • Proficiency test of non-target screening with gas chromatography mass spectrometry to confirm a detected contamination of raw and drinking water

    Much of the water supply industry has implemented online monitoring and warning systems for chemical or biological contaminations. When a contamination is detected, further investigations are necessary to confirm or to cancel the initial alarm. The proficiency of a non-target screening approach with solid phase extraction and GCMS in full-scan mode was examined. A selection of pesticides and ...


    By IWA Publishing

  • Case study - Advanced

    This rainwater system does double duty, providing pressurized irrigation water while simultaneously aiding the efficiency of the building’s rooftop cooling system. Project: AdvancED Location: Alpharetta, GA Application: Landscape Irrigation and Evaporative Cooling System(s): 30,000 Gallon Underground Tank w/ H2 ...

  • Tracking biological pollution sources using PCR-DGGE technology at Ta-An Beach

    The environmental authority of Taiwan has announced that ocean quality standard A, with E. coli less than 1,000 CFU/100 mL is safe for swimming. Ta-An Beach in central Taiwan was found to have exceeded 1,000 CFU/100 mL, which is 51% of the total monitoring records. Sewage, piggery and duck wastewater are discharged directly into this area. The traditional pollution source trace methods did not ...


    By IWA Publishing

  • Process cooling in Singapore case study

    Chemical free Scale and Legionella prevention by Fluid Dynamics Introduction The client, Sunstream International is a company specialising in plastics sheet extrusion. Sunstream were installing a new extrusion line in their existing factory. The line has two chillers and a 50RT cooling tower positioned on the roof space. Space was at a premium and also previous ...

  • The effect of immobilized catalyst structure on the degradation of chemical and biological contaminants in simulated solar photocatalytic water purification

    The performance of different configurations of titanium dioxide-coated foam supports as photocatalysts in an enhanced solar disinfection system for drinking water treatment was evaluated, using the reduction of methylene blue, 1-4-dioxane, and Escherichia coli as performance indicators. Reactors with immobilized catalysts were able to match or surpass the performance of a suspension ...


    By IWA Publishing

  • Ensuring safe drinking water case study

    Challenge: A state environmental agency contracted with Antea Group to assist in the execution of a state-wide clean drinking water program. Program objectives included the development of an efficient and standardized program to monitor for chemical and biological contaminants across more than 6,500 public water systems. ...


    By Antea Group - USA

  • Biological effects of contaminants on marine organisms: the contribution of biotechnology

    One aspect of ecotoxicology concerns the effects of contaminants. Work on this area in the marine field is recent but useful for numerous applications, such as toxicological tests, the evaluation of organism response and the development of networks for the measurement of pollutant effects. In this context, the contribution of biotechnologies and technical advances in modern biology is important. ...


    By Inderscience Publishers

  • Water purification

    Water purification is a process of removing undesirable chemicals, materials, and biological contaminants from raw water. The goal is to produce water fit for a specific purpose. Most water is purified for human consumption (Drinking water) but water purification may also be designed for a variety of other purposes, ...


    By IWA Publishing

  • Removal of trichloroethylene in groundwater with two oxidants: siderite catalyzed hydrogen peroxide and sodium persulfate

    Trichloroethylene (TCE), a widely used solvent, is often determined in groundwater and is one of biologically refractory organic contaminants. The aim of the study is to use a new chemical oxidation method to degrade TCE source pollution in groundwater. Fenton-like reactions (hydrogen peroxide catalyzed by iron minerals generates hydroxyl radicals) and sodium persulfate activation (sodium ...


    By IWA Publishing

  • Biofiltration Treatment of α-Pinene

    This paper provides an overview of air biofiltration with experimental data on the performance of a synthetic media biofilter system. It is shown that use of high surface area per unit volume structured media results in higher contaminant treatment rates per unit biofilter volume. It is shown that use of specially designed synthetic media allows effective control of biomass buildup by continuous ...


    By PRD Tech, Inc.

  • What are the different types of water filtration systems?

    These days’ people are looking for more and more effective ways to make their lives a little healthier and hygienic than it used to be. One of the simplest and commonest means to obtain this is to research the various ways of treatment systems and to choose the best one according to your budget and lifestyle. It has become hazardously dangerous to drink tap water in the today’s ...

  • Indoor Climate Control Wiki

    Indoors climate control wiki generally refers to houses, offices, industries, movie theaters, restaurants, shopping malls, cars, ships, and planes. Because different air pollution sources are exhausted indoors or outdoors continuously or from time to time, the pollutants will be accumulated in sealed places under the ...

  • A statistical approach applied to trace metal data from biomonitoring studies

    This work underlines the importance of the statistical procedures necessary for the significant assessment of analytical data of heavy metals derived from marine organisms (biomonitors) collected at five stations in Ustica at the Southern Tyrrhenian Sea. The statistical method described indicates that, where the differences among the averages of Pb, Cu and Zn concentrations in the molluscs of the ...


    By Inderscience Publishers

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