source emissions Articles

  • How Does a Gas Analyser Work?

    Whatever you want to detect, you need to identify a property of the object that is easy-enough to measure. When it comes to monitoring and analysis of gaseous species (atoms or more commonly molecules), it turns out that it often is possible to utilize the optical properties of the gas. You need a light source, a light detector, and a characteristic behaviour of the gaseous species in question ...


    By Opsis AB

  • New Source Permitting and Visibility: Strategies for Developers of New Emissions Sources

    Several recent developments have occurred which affect thousands of new or proposed emission sources in virtually every region of the country. These developments include the availability of new, more accurate techniques for assessing air quality impacts, and the increasing influence of Federal Land Managers (FLMs). Proposed facilities that are major emissions sources subject to Prevention of ...


    By AECOM

  • California`s Achievements in Mobile Source Emissions Control

    Untitled Document Since its formation in 1967, the California Air Resources Board (CARB) has successfully launched numerous emissions reduction programs in the state. These ...

  • Sources of PCDDs/PCDFs In Cement Kiln Emissions

    Abstract This paper presents data on the source of PCDDs/PCDFs in cement plant stack emissions, demonstrating that these emissions are not necessarily all created by the process. The data potentially demonstrates that some of the PCDDs/PCDFs in the emissions are pre-existing dioxins and furans that are vaporized out of the kiln raw feed. This calls into question the assumption that PCDD/PCDF ...


  • Sources of particulate matter: emission profile of biomass burning

    Biomass burning is an important source of atmospheric Particulate Matter (PM) in Brazil: the burning of forests in the northwest and of sugar cane plantations in the southeast are important examples. The objective of this work is the measurement of the PM emission profile of burning of sugar cane and other characteristic vegetative burning in the region of Sao Carlos-SP/Brazil. Samples of PM10 ...


    By Inderscience Publishers

  • Sensitivity of AERMOD in Modeling Fugitive Dust Emission Sources

    Dispersion modelers have long faced challenges estimating ambient pollutant concentrations caused by releases from “fugitive” sources of particulate matter, such as paved and unpaved roadways, raw material storage piles, outdoor material processing operations, agricultural activities, or windblown dust in general. Fugitive emissions are commonly defined as those that could not ...

  • Function of receptor sensitivity to the spatial proximity of emission sources and the conjugate problem

    The function of the receptor sensitivity of a territory to placing emission objects (roads, factories, electrical power plants etc) on it can be effectively calculated with the aid of the mathematical apparatus of conjugate problems. Solutions to conjugate equations make it possible to determine the effect of pollution in the form of aerosols or harmful gaseous impurities on the environment and ...


    By Inderscience Publishers

  • Characterisation for some emission sources in CMB calculation for Mae Moh area, Thailand

    Particulate samples of agricultural waste burning, straw burning, forest leaf burning, heavy duty truck emission, paved road dust, soil, agricultural soil, coal, electrostatic precipitator ash, and emission from stack power plant were collected from the Mae Moh area. Chemical compositions of sampling filters were analysed to determine the particulate matter source profiles. The analysis included ...


    By Inderscience Publishers

  • Analysis of point source emissions in the Texas-Mexico border region

    Pollutant emissions in the Texas-Mexico border were investigated using an emission database that covers 25 Texas counties and the states of Coahuila, Chihuahua, Nuevo Leon and Tamaulipas in Mexico. Major emissions are from energy generation, mainly from two coal-fired facilities in Coahuila, which also generate most of carbon dioxide. Texas exhibits a larger concentration of sources; around ...


    By Inderscience Publishers

  • Effect of carbon sources on nitrous oxide emission in a modified Ludzak Ettinger process

    Effect of methanol and glycerol on nitrous oxide (N2O) emission in two laboratory-scale modified Ludzak Ettinger (MLE) processes was investigated during three distinct periods: dissolved oxygen (DO) control by intermittent aeration with a DO controller, and high and low aeration rates. N2O consumption rate in an anoxic tank and aeration mode influenced N2O emission rates from ...


    By IWA Publishing

  • Performance of AERMOD vs. CALPUFF on Fugitive Emission Sources in the Nearfield

    Abstract On November 9, 2006, the AMS/U.S. EPA Regulatory Model (AERMOD) replaced the Industrial Source Complex (ISC) model as the U.S. EPA-approved regulatory model for analyses in the nearfield (less than 50 kilometers from a site). The CALPUFF modeling system, another U.S. EPA-approved model typically regarded as a long-range transport model, can also be utilized in the nearfield on a ...


    By Trinity Consultants

  • Studies of Emissions from Anthropogenic and Natural Dust Sources in the Western United States

    Dust is a significant component of visibility degradation in the western United States. As implied by the national goal defined in the Regional Haze Rule (RHR),1 only visibility impairments from man-made pollution must be prevented and/or remedied. However, dust sources, particularly fugitive dust sources, can result from both man-made and natural conditions. Historically, particulate matter (PM) ...


    By ENVIRON

  • Acoustic emission source localisation on bone using multiple regression

    A regression source location algorithm is developed to locate microcracks in bovine bone samples. Bone samples measuring 60 mm long, 22 mm wide and 5.5 mm thick were harvested from bovine femora. Artificial acoustic emission sources were created on the bone samples. The known location of these acoustic emission sources and the recorded arrival times at four acoustic emission sensors were used to ...


    By Inderscience Publishers

  • Mobile Stationary Source Emissions Testing, Coming to a Facility Near You?

    Last week, Antea Group had the unique opportunity to perform a RATA (relative accuracy test audit) of the emissions from a thermal oxidizer at an ethanol production facility located in Minnesota using a state-of-the-art mobile testing laboratory. During this RATA audit, actual stack emissions levels (including NOx, SOx, CO2, CO, O2, flow rate, temperature, velocity and pressure) from the ...


    By Antea Group - USA

  • Extraction of many emission sources in extensive factory premises - Case Study

    Example: Packaging Similar tasks: Coating, Automobile industry, paint production Different production processes lead to decentralised ventilation of emission sources. These decentralised ventilations are consolidated within a central air pollution control system. A producer of plastic, cardboard and composite material packages uses a range of printing units, laminating machines ...

  • Another source of methane release

    Mary Kang wasn’t even originally looking at methane emissions. The Princeton doctoral candidate was trying to get to the bottom of another issue: carbon dioxide escaping after being stored underground. During that research, she got to wondering about methane emissions from old oil and natural gas wells. What Kang, now a Stanford postdoctoral researcher, and other researchers found could be ...


    By Ensia

  • Source apportionment of nitrogen in Estonian rivers

    The statistical model MESAW (Matrix Equations for Source Apportionment on Watershed) was used to estimate the diffuse unit-area source emission coefficients of nitrogen in Estonian rivers. The input data included monitored riverine loads, point sources and land use categories from a total of 50 rivers/catchment areas. Two independent studies were conducted: the estimation of emission ...


    By IWA Publishing

  • EPA’s Biogenic Carbon Emissions Panel Discusses SAB Comments On Draft Framework For Assessing Biogenic CO2 Emissions from Stationary Sources

    On October 12, 2016, EPA convened a public advisory committee teleconference of the Biogenic Carbon Emissions Panel. This advisory meeting discussed comments from chartered Science Advisory Board (SAB) members from the ...


    By Bergeson & Campbell, P.C.

  • The Area Source Mact/Gact Challenge

    Dozens of new federal rules, regulating over 180 Hazardous Air Pollutants for relatively small sources, present a new and unique challenge for the air pollution profession. Over the past two decades, a large number of federal regulations have been adopted to control Hazardous Air Pollutants (HAPs) originating from a wide range of source categories from the corner dry cleaner to petroleum ...

  • Projecting emission reductions from prospective mobile sources policies by road link-based modelling

    A methodology was developed to project total vehicular emissions from different emission reduction policies for the light-duty vehicles in the roads network of Tehran, Iran. A road-link-based model was constructed based on a bottom-up approach by coupling COPERT emission functions with the travel demand model of EMME/2. Results showed total emission from the studied network was largely impacted ...


    By Inderscience Publishers

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