Continuous Emissions Monitoring (CEMS) Articles

  • Axetris LGD F200-NH3 successfully integrated and tested at Harper Adams University - Case study

    Researchers at Harper Adams University, Shropshire, United Kingdom, built and tested a multi-channel ammonia monitoring system by integrating the Axetris LGD F200 with the goal of developing a system which would provide substantially higher measurement performance, while being cost-efficient and robust for real-world use. Extensive tests were conducted over the span of multiple years, and the LGD ...


    By Axetris Ag

  • DOAS Explained

    DOAS stands for Differential Optical Absorption Spectroscopy. The DOAS technique was conceived almost a century ago, and it was applied on research level to air quality monitoring already in the 1970s. In the mid-1980s, the technology was then commercialised and turned into practical and wide-spread use. The acronym DOAS itself reveals quite a lot of what it is about. ...


    By Opsis AB

  • Who Needs Continuous Emissions Monitoring?

    Continuous emissions monitoring (CEM) is about monitoring air pollutants generated by a specific activity and emitted to the ambient air, typically through a tall stack or other exhaust pipe. The “activity” can be some industrial process like a power plant or a waste incinerator, but it can also be on a much smaller scale such as a car equipped with an internal-combustion engine. ...


    By Opsis AB

  • What you need to know about mercury emissions monitoring

    Gasmet Technologies (Finland) has published a new White Paper on the monitoring of mercury emissions to air from industrial processes. The Paper provides an overview of current initiatives to reduce mercury emissions and explains how continuous mercury emissions monitoring can help inform process control and the efficient operation of pollution abatement equipment, whilst also demonstrating ...


    By Gasmet Technologies Oy

  • Organic carbon at a remote site of the western Mediterranean Basin: sources and chemistry during the ChArMEx SOP2 field experiment

    Abstract The ChArMEx (Chemistry and Aerosols Mediterranean Experiments) SOP2 (special observation period 2) field campaign took place from 15 July to 5 August 2013 in the western Mediterranean Basin at Ersa, a remote site in Cape Corse. During the campaign more than 80 volatile organic compounds (VOCs), including oxygenated species, were measured by different online and offline ...


    By ECO PHYSICS AG

  • 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

  • Blockchain Technology Can Boost Climate Action

    Experts meeting at the recent UN Climate Change Conference in Bonn in May have said that a new technology called “Blockchain” could play a major role in tackling climate change. A Blockchain is a distributed database that is continuously updated and verified by its users. Each added block of data is “chained” and becomes part of a growing list of records, under the ...

  • Monitoring Gas Emissions from Volcanoes to Predict Volcanic Activity

    To understand and predict the behaviour of volcanoes an increasing number of scientists are combining geological monitoring and geochemical models. By measuring and monitoring the prevalence of gases like CO2, scientists hope to be able to better predict the likelihood of volcanic eruptions. In 2010 Iceland’s Eyjafjallajökull volcano erupted, releasing 250 million ...


    By Edinburgh Sensors Ltd

  • Simultaneous optimization of clustering and fuzzy IF-THEN rules parameters by the genetic algorithm in fuzzy inference system-based wave predictor models

    Prediction of wave parameters is of great importance in the design of marine structures. In this paper, two shortcomings with the adaptive network-based fuzzy inference system (ANFIS) model for prediction of wave parameters are remedied by employing a genetic algorithm (GA). The first shortcoming in the ANFIS model goes back to its problem for automatic extraction of fuzzy IF-THEN rules and ...


    By IWA Publishing

  • Global solution: Gas and particulate analysis in Cement industry

    Cement plants are increasingly required to install continuous emission monitoring systems (CEMS). While these represent a significant financial outlay, a range of other factors also need to be considered when selecting a suitable CEMS. To the inexperienced, selecting a suitable CEM can mistakenly be considered as simply ensuring that the applicable national regulations (eg MACT in the USA, ...


    By Environnement S.A

  • Fast, simultaneous and continuous monitoring of NOx and NH3 in DeNOx applications

    In DeNOx systems using urea injection with ammonia (NH3) as a reducing agent, the flow rate and control of NH3 must be continuously adjusted and controlled to prevent excess NH3 emissions (slip), to reduce environmental impact and cost of reagents. To optimize this process, it is essential to use an emissions analysis system for simultaneous and continuous monitoring of NOx and NH3. For preparing ...


    By Environnement S.A

  • Green Buildings: Economics and Policies

    Introduction Green building has received increased attention over the past decade from both environmental economists and policymakers. While there is no single definition of “green buildings” or its related policy, researchers and organizations tend to emphasize resource efficiency in building and reducing the impacts of buildings on human health and the environment. ...


    By Oxford Journals

  • Corporate Injury Reporting

    Are more people-centric metrics needed? A new study by Corporate Knights has looked at 4,469 large companies on 45 different stock exchanges to determine their level of voluntary reporting in 2014 in relation to seven sustainability-based performance indicators Their study reveals that only 19% of these companies were disclosing their injury rates compared to 62% who published ...


    By SHEilds Ltd

  • Warehouse Optimization: Balancing Equipment Performance and Worker Safety Through Emissions Measurements and Air Quality Monitoring

    Successful warehouse functionality is dependent on both maximizing equipment performance and providing a safe and healthy environment for workers that encourages productivity. However, these two factors are often at odds with each other as warehouse equipment such as forklifts, burnishers and delivery trucks emit toxic gases that can have the potential to create poor indoor air quality which ...

  • WESPS continue to deliver

    Compliance with the increasingly stringent air pollution regulations of recent years is not the only reason forwardthinking industry leaders are adopting more sophisticated gas cleaning and air pollution control strategies. The desire to achieve higher performance efficiencies, control costs in a competitive marketplace, and stay ahead of the regulatory compliance curve is another driver of ...


    By Beltran Technologies, Inc.

  • Modeling Tip: Using Hourly Emission File Editor in BREEZE AERMOD

    BREEZE AERMOD includes numerous time-saving tools to help with setting up a modeling run. One of these tools is the Hourly Emission File Editor. This modeling tip explains how to use that tool to easily use refined hourly emission rate data in your AERMOD runs. AERMOD offers many options for capturing the variability of emission rates and other source parameters. Emission rates can be varied by ...

  • Successful reduction of diffuse nitrogen emissions at catchment scale: example from the pilot River Odense, Denmark

    Land-based total nitrogen (N) loadings to Danish coastal waters have been markedly reduced since 2000. This has been achieved by general measures reducing discharges from all point sources and N leaching from farmed land supplemented with more local and targeted mitigation measures such as restoration of wetlands to increase the catchment-specific N retention. In the catchment of River Odense, ...


    By IWA Publishing

  • Modelling emissions of perfluorinated chemicals to the Danube River Basin

    The emissions of two perfluoroalkyl acids (PFAAs) into the Danube River Basin have been estimated in a test of four different hypotheses regarding the factors affecting those emissions. The results were used to simulate water concentrations for comparison with measured data. The researchers found that incorporating wastewater treatment information and wealth distribution alongside population data ...

  • Delaying substantial emission reductions limits climate policy choices

    If fast and substantial reduction in greenhouse gas emissions is postponed further, there are fewer options available to stay below the 2 °C warming target for the end of the century. Delayed action is likely to require measures that remove CO2 from the atmosphere by planting forests and using bioenergy in combination with carbon capture and storage. The latter technique ...

  • Global growth in CO2 emissions almost stalled in 2014

    In 2014, the growth in global CO2 emissions from fossil fuel use and cement production slowed down to only 0.5% compared to 2013, while the world’s economy grew by 3%, showing a partial decoupling of CO2 emissions and economic growth. China and the United States increased their emissions by 0.9%. In the European Union, CO2 emissions decreased by an ...

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