air particle monitoring Articles

  • Statistical Corrections Microbial Monitoring in Grade C/D Cleanrooms

    Microbiologists rely on the Feller table to correct for undercounting of biological activity. The “Table of statistical corrections according to Feller” is based on the principle that as the number of viable particles — colony forming units (CFUs) — impact on an agar plate increases, the probability that viable particles will enter unoccupied space decreases. This table is ...


    By Particle Measuring Systems

  • Evaluation of dustfall in the air of yazd

    Humar can not live without breathing air. Humar needs air even more than water and food. Average amount of air breathing by an adult is 15 kg in 24 hours while water and food using by adult is 2.5 and 1.5 kg. To consider how important of air, it is enough to know that people can continue to live without food for 5 weeks and without water for 5 days but without air can not continue to live more ...


    By University of Tehran

  • Evaluation of flow hydrodynamics in a pilot-scale dissolved air flotation tank: a comparison between CFD and experimental measurements

    Computational fluid dynamics (CFD) models of dissolved air flotation (DAF) have shown formation of stratified flow (back and forth horizontal flow layers at the top of the separation zone) and its impact on improved DAF efficiency. However, there has been a lack of experimental validation of CFD predictions, especially in the presence of solid particles. In this work, for the first time, both ...


    By IWA Publishing

  • Evaluation of flow hydrodynamics in a pilot-scale dissolved air flotation tank: a comparison between CFD and experimental measurements

    Computational fluid dynamics (CFD) models of dissolved air flotation (DAF) have shown formation of stratified flow (back and forth horizontal flow layers at the top of the separation zone) and its impact on improved DAF efficiency. However, there has been a lack of experimental validation of CFD predictions, especially in the presence of solid particles. In this work, for the first time, both ...


    By IWA Publishing

  • Microfiltration Pilot System, California

    INTRODUCTION In May 2013, Pure Aqua, Inc. successfully manufactured and supplied an microfiltration pilot system to a membrane manufacturer for Title 22 certification. Title 22 is the State of California’s stringent standard for treatment/disinfection of wastewater for non-potable reuse and ...


    By Pure Aqua, Inc.

  • Particles Matter

    We all can recall our mothers telling us as children to go outside and get some fresh air.  Who would have known just how important this statement was and is today?  Air pollution affects the entire planet. You can't escape it anywhere not even inside your home or office. According to the United States Environmental Protection Agency (EPA), indoor air can be up to ten times more ...

  • Best practices for air sampling in veterinary environment with the coriolis® μ

    It is extremely important to monitor exposure to bio-contamination in veterinary-based facilities such as CAFOs, farms and life-stock areas. Reducing the risk of exposure to air borne bio-contaminants is crucial for the human and animal well-being in those environments. The Coriolis® μ innovative biological airsampler developed by Bertin Instruments is perfectly suited for environmental ...


    By Bertin Instruments

  • Modelling the impact of sea-salt particles on the exceedances of daily PM10 air quality standards in the Netherlands

    Particles generated at the sea surface contribute to PM10 levels in coastal areas. Current estimates suggest annual average contributions of up to 10 µg/m³ along the North Sea coast in the Netherlands. In this paper the generation of size-segregated sea salt particles is described as a function of meteorological parameters. These particles are fed into a model ...


    By Inderscience Publishers

  • Met One and Aeroqual combine monitors into a single package

    Met One’s popular EBAM Plus and Black Carbon monitors are now available as add-on integrations to Aeroqual’s AQS and Dust Sentry monitors and Aeroqual Cloud software. Aeroqual and Met One Instruments have today announced the expansion of their partnership that will see the ...


    By Aeroqual Limited

  • Understanding the Connection Between Air Pollution and COVID-19

    It’s known that air pollution is a contributing factor to a vast majority of respiratory health issues [1], so it’s not surprising that researchers are exploring the relationship between areas with high air pollution and the elevated health risks associated with COVID-19, the respiratory disease caused by the novel ...


    By Sterlitech Corporation

  • Cigarette smoke: size distribution and effects on filters

    Cigarette smoke is an important aerosol in the air filtration industry and research. It is an unwanted aerosol and therefore there are many applications for air filtration (ex. cigarette filters, residential and commercial ventilation filters, home air cleaners). Cigarette smoke is especially important to air filter performance for several reasons. First, the size of cigarette smoke particles ...

  • Selecting an Airborne Particle Counter: Types of Monitoring (Series Part 2 of 4)

    Frequent or Continuous? Frequent Monitoring To demonstrate compliance to ISO, frequent monitoring requires sampling at specified time intervals not exceeding 60 minutes during operation. Manifold systems are the least expensive solution and usually installed during the cleanroom construction process. Standalone particle counters may be installed at any time. A ...


    By Particle Measuring Systems

  • Pegasor AQ Indoor - White Paper

    What needs to be measured from indoor air? Today there is no legislation for indoor air ultrafine particle (UFP) concentration. Particulate matter found indoors will include particles of outdoor origin that migrate indoors and particles that originate from indoor sources. Indoor Particulate Matter (PM) can be generated through cooking, combustion activities (including burning of ...


    By Pegasor Oy (Ltd)

  • Dust monitoring with AirSafe - Case Study

    Application A waste incineration plant burns waste. A fi nal product of this incineration process is fi lter dust, which is stored in silos before being evacuated. For the ambient air monitoring of the silos, convey lines and connected rooms, the plant manager looked for a maintenance-free way to detect dust leaks and malfunctions. Optical techniques were not ...


    By ENVEA

  • Guide to Particle Measurement Techniques

    Background Particle counting is a critical aspect of any machine conditioning program and there are many tools out there available to monitor and track the quantity and severity of the contamination, be it due to external contamination or machine wear. The specific application and type of particles will often govern what is the ...


    By Spectro Scientific

  • Maintaining Quality in Stem Cell Products: Stem Cell Process Monitoring (Series Part 4 of 4)

    Routine cleanroom, clean air devices, and personnel monitoring should be performed during operation throughout all critical stages. Ideally, monitoring should capture all interventions, transient events and system deterioration. The type of contamination being monitoring is either total particle (non-viable) or viable. Requirements for All Types of Monitoring The locations, ...


    By Particle Measuring Systems

  • Best practices for air sampling in veterinary environment with the Coriolis®μ

    It is extremely important to monitor exposure to bio-contamination not only in clean room environments based in research laboratories and hospitals, but also in veterinary-based facilities such as CAFOs, farms and life-stock areas. Reducing the risk of exposure to airborne bio-contaminants is crucial for the ...


    By Bertin Instruments

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