bacteria testing Articles

  • How to identify issues in water quality

    Water quality can mean different things to different people and therefore depends on what standard of quality one is looking for, for example, water may be fine for fish to live in but lack the quality required for human consumption. To measure the quality of water accurately, tests are carried out to identify several key indicators. These characteristics are then compared ...


    By Aquaread Limited

  • A theory of the lifecycle of bacteria

    Aims: The principal objective of this study was to investigate viability kinetics in aerobic AS (Activated Sludge). Methods and Results: A kinetic model was developed in order to predict viable cells, non-degraded dead cells and inert VSS (Volatile Suspended Solids) in a reactor – usually conventional models only predict active biomass and inert VSS. The following processes were considered in ...


  • Controlling Bacteria In a Clean Room Environment

    Maintaining the integrity of a cleanroom is a constant battle. The first step to deciding which method, or combination of methods, to employ is to identify the prime sources of contamination. There are three prime sources of contamination through which the integrity of a cleanroom might be breached. First, there is the human element. While many processes might be automated, many situations remain ...


    By GVS Filter Technology

  • Antibiotic resistance among autochthonous aquatic environmental bacteria

    Antibiotics are widely used in both human and veterinary medicine and antibiotic-resistant bacteria cause problems in antibiotic therapy. The current study was conducted in the catchment area of the river Swist (Germany) and focuses on the resistance of environmental Rhodospirillaceae to antibiotics used in human medicine. The samples collected reflect different levels of human impact on the ...


    By IWA Publishing

  • Effect of daylight on regrowth of bacteria in anaerobically digested sludge

    This study investigated the regrowth of total coliform, Salmonella, and Clostridium perfringens in anaerobically digested sludge after centrifuge dewatering in the presence and absence of daylight. Sludge cake and centrate samples were collected from a treatment plant, and half of the samples was stored in daylight and the other half was stored in dark for three weeks. The ...


    By IWA Publishing

  • Adapter bacteria control oil spill in bulk

    Introduction Microbac was called in to advise on a required treatment for an integrated bulk oil handling facility and sea-land terminal, receiving, storing and shipping a wide variety of liquid fuels, inorganic chemicals and petrochemicals, many of which are toxic to microorganisms. The variable and complex waste streams from tank truck cleaning, ballast and tank cleaning discharges from ...


    By Microbac Ltd

  • An Evaluation of the Effectiveness of the Gunderboom® in Protecting Waters from Bacteria

    Beaches located in the narrow inlet of Long Island Sound frequently contain high concentrations of bacteria. A Gunderboom® BPS™ (Beach Protection System) filter was installed in Harbor Island Park of Mamaroneck Harbor, New York, in 2002 to reduce bacterial levels in the water. Water and sediment collected inside and outside the Gunderboom® and other areas within Mamaroneck Harbor (Shore Acres ...

  • Baby teethers may contain dangerous bacteria

    According to a FDA report released last month children are at risk from some gel-filled teethers that may contain Bacillus subtilis and Bacillus circulans bacteria. Following the report a major manufacturer of teethers issued a recall on their gel-filled teethers and has ceased production and distribution of the products.The FDA release stated that “Although these bacteria generally do not cause ...


  • Multiplex PCR for detection of water-borne bacteria

    Microbial water-borne diseases still affect developing countries and are major water quality concerns throughout the world. Routine culture-based methods of identifying bacterial pathogens in water sources are laborious and time-consuming. Recently, the use of molecular techniques such as the polymerase chain reaction (PCR) has provided rapid and highly promising detection methods. In this ...


    By IWA Publishing

  • Best Steam Cleaner for Complete Bacteria Elimination

    The best steam cleaner for commercial applications have three functions: Removing dirt and stains Removing allergens Eliminating germs and pests Dirt Removal Mud spots, sugars, food residue, and stains can be removed more completely by using the best steam cleaner systems, with high temperature and pressure levels. Ideally, the best steam ...


    By Daimer Industries Inc.

  • Overcoming iron bacteria problems: An Australian perspective

    Iron bacteria are becoming an increasing problem in groundwater bores and are estimated to affect about 40% of the world’s water bores with anecdotal evidence indicating that this number is steadily increasing. Iron bacteria derive energy during their metabolism through oxidising soluble ferrous iron, present in the groundwater, to its insoluble ferric form. The resultant biofilm is ...


    By Geoquip Water Solutions

  • Estimation of dead or live bacteria using online Bacteria Activity monitoring - Case Study

    The BACTcontrol, a microLAN instrument, measures on-line bacterial enzyme activity in food and aquatic samples. Besides ß-DGlucuronidase, ß-Galactosidase and ß-Glucosidase to measure E.coli, Coliform and Enterococci activity respectively also alkaline phosphatase (ALP) activity is measured to determine Total Activity. The BACTcontrol TA test measures the metabolism activity of ...


    By microLAN B.V.

  • Detection of DNA sequences of bacteria using a direct electrochemi-luminescence method

    Real-time detection of microbiological contamination in water is a challenging issue in comparison to the state-of-the-art re-quired minimum test-duration of 48 to 72 hours. Pathogen bac-teria in drinking water, like Escherichia Coli, can be detected by identification of their DNA. First, the specific sequences of the DNA have to be selected by hybridization with a corre-sponding probe. The ...


  • Use of bauxite for enhanced removal of bacteria in slow sand filters

    Slow sand filtration (SSF) is a well-known process for drinking water treatment and is widely used for the production of biologically stable drinking water and particle removal. The removal process of particles and microorganisms is highly dependent on the buildup of the schmutzdecke at the filter surface. During the ripening period and especially for cold waters, the buildup of the ...


    By IWA Publishing

  • IAQ investigators often overlook Bacteria as the Root Cause of Occupant Complaints

    Untitled Document Many investigators have been dealing with mold issues the last few years and may have been overlooking bacteria as the underlying microbial problem. Bacteria ...


    By EMSL Analytical, Inc.

  • Sulphate reducing bacteria to precipitate mercury after electrokinetic soil remediation

    Combined treatment with electroremediation and sulphate reducing bacteria (SRB) was tested in laboratory and pilot scale. The contaminated soil came from a chlor-alkali factory and contained about 100 mg/kg Hg. Iodide/iodine complexing agent was used to mobilize mercury. Mercury iodide complexes were moved to the anode solution using an electric field. The anode solution was then mixed with ...

  • Potentially pathogenic bacteria isolated from different tropical waters in Sri Lanka

    This study investigated the bacteriological contamination of different water sources in Sri Lanka. Source waters (n = 74) including bottled water, well water and surface water were assessed for enumerating total coliforms and faecal coliforms using the membrane filtration method. The results showed that 18.5 and 14.8% of bottled water samples were contaminated with total ...


    By IWA Publishing

  • Antibiotic resistance among aquatic bacteria in natural freshwater environments of Korea

    The taxonomic diversity and antibiotic resistance among freshwater bacterial communities in the major water bodies of Korea was examined using 437 penicillin-resistant, and 110 tetracycline-resistant bacterial isolates. Based on 16S rRNA gene sequence analysis, most isolates were assigned to Proteobacteria, which was then followed by Bacteroidetes. Strains of Aeromonas were found as the most ...


    By IWA Publishing

  • Halliburton hunts new bacteria killer to protect Shale-gas boom

    Halliburton Co. and Schlumberger Ltd., trying to forestall a regulatory crackdown that would cut natural-gas drilling, are developing ways to eliminate the need for chemicals that may taint water supplies near wells. At risk is hydraulic fracturing, or fracking, a process that unlocked gas deposits in shale formations and drove gains in U.S. production of the fuel. Proposed regulations might slow ...


    By Biolargo, Inc.

  • Isolation of surfactant-resistant bacteria from natural, surfactant-rich marine habitats

    Environmental remediation efforts often utilize either biodegradative microbes or surfactants, but not in combination. Coupling both strategies holds the potential to dramatically increase the rate and extent of remediation because surfactants can enhance the bioavailability of contaminants to microbes. However, many surfactants permeabilize ...

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