Air Consulting Articles

  • Modeling Tip: How to Import BREEZE AERMOD files into BREEZE Risk Analyst for Human Health Risk Assessments

    Humans can be exposed to hazardous air pollutants (HAPs) either directly through inhalation or indirectly through ingestion or dermal contact, which can result in acute or chronic health effects. The risk of exposure varies depending on a number of variables, including the meteorological conditions, local geographical and emissions characteristics, the age of the individuals being exposed, and ...

  • Optimization of atmospheric air plasma for degradation of organic dyes in wastewater

    This study optimises the degradation of a cocktail of the dyes methyl orange and bromothymol blue by atmospheric air plasma. Response surface methodology (RSM) was employed to investigate the efficacy of the plasma process parameters on degradation efficiency. A Box–Behnken design (BBD) was employed to optimise the degradation of dyes by air plasma discharge. A second order polynomial equation ...


    By IWA Publishing

  • Landfills have a huge greenhouse gas problem. Here’s what we can do about it.

    We take out our trash and feel lighter and cleaner. But at the landfill, the food and yard waste that trash contains is decomposing and releasing methane, a greenhouse gas that’s 28 times more potent than carbon dioxide. Landfill gas also contributes to smog, worsening health problems like asthma. Globally, trash released nearly 800 million metric tons (882 million tons) of ...


    By Ensia

  • 4 Signs Of Poor Indoor Air Quality To Watch For

    The quality of indoor air is something most of us take for granted. Unless there is something very specific and unusual going on around us, like heavy cleaning or maybe new construction, we don’t often think about whether or not there is anything wrong with the air we breathe as we go about our daily business. The truth is, though, that indoor air quality is often worse than ...


    By Camfil Ltd

  • Modeling Tip: How to Merge BREEZE Remote Modeling System’s Results with the Local .AMZ File and View Results in BREEZE AERMOD

    The BREEZE Remote Modeling System (BRMS) is a Web-enabled application that executes AERMOD model runs in a fraction of the time they take on a desktop computer, thereby assisting modelers in reducing model runtimes on large or highly time-sensitive AERMOD model runs. The BRMS operates on a massively parallel computer cluster that ...

  • A 3-scope emissions solution

    In September, Bullfrog Power launched the availability of green fuel for businesses across Canada. Bullfrog Power’s green fuel is an earth-friendly, renewable alternative to liquid fossil fuel, allowing climate-conscious businesses in Canada to reduce the ...


    By Bullfrog Power Inc.

  • 5 Things You Probably Didnt Know About Indoor Air Quality

    Did you know that air fresheners, candles, furniture, carpets & many other items create indoor air pollutants and are a health risk says Camfil Air Filtration Experts! When you mention air pollution, most people automatically think of smog around cities and factories, or millions of cars racing from one place to another leaving trails of fumes behind them as they ...


    By Camfil Ltd

  • Air Conditioning That`s Out of This World

    New materials enhance the cooling effects from outer space to reduce energy use in small- to medium-sized buildings Reducing air conditioning energy use by using new materials to enhance the cooling effects from outer space may not be such a far-out idea. In a simulation study using DOE's Energy Plus software and ...


    By US Department of Energy

  • How to Get Higher Acceptable Indoor Air Quality Anywhere

    The quality of the indoor air we breathe is a concern for everyone, especially those in urban environments where contaminant and particle levels are higher due to nearly constant exposure to things like automobile and truck exhausts, construction, and fumigation. Unfortunately for most people, when it comes to the quality of the air in the buildings where they spend most of their time, ...


    By Camfil Ltd

  • Modeling Tip: Importing a Map Image File into BREEZE AERMOD or 3D Analyst

    Imported maps can be very helpful when setting up a model scenario and analyzing the results. They can be used as a QA/QC method for ensuring that model objects are in the correct locations and they can also help better visualize results graphically. Although a map file is not required, BREEZE ...

  • Paris Climate Change Agreement: What next?

    The Paris Climate Change Agreement took a huge leap forward on 3 September when the world's two biggest economies and emitters of greenhouse gases – the USA and China – announced that they would formally ratify the accord. This brings hope that the deal will be concluded this year. It also piles pressure on the UK to swiftly formalise its commitment to a contract it shaped ...


    By Inprova Energy

  • Modeling Tip: Creating Animations in BREEZE 3D Analyst

    The powerful post-processor, BREEZE 3D Analyst, enables you to analyze and visualize data in multiple formats to help you better understand, interpret, and summarize your modeling results. To best assist our users, a complimentary license of BREEZE 3D Analyst is included with the purchase of ...

  • Modeling Tip: Batch Scheduling and Restart Options in BREEZE AERMOD for Large Modeling Runs

    Although the advanced physics in U.S. EPA’s AERMOD more accurately represent dispersion of pollutants in the atmosphere, it comes with the disadvantage of greatly increased model run times. Even for a comparatively small project containing a few thousand receptors and a dozen sources, the runtimes can last longer than an hour. This makes the scenario where dozens of runs need to submitted ...

  • Modeling Tip: How Parallel Processing can Expedite Large AERMOD Model Runs

    Due to advances in scientific knowledge, higher resolution raw data, stringent air quality standards, and changing regulations, environmental modeling is demanding more and more from EHS professionals and their computers. All of these influences have resulted in significantly longer AERMOD model run times as compared to the predecessor regulatory model, ISCST. Instead of minutes, AERMOD runtimes ...

  • Longitudinal dispersion in open channel flow with suspended canopies

    Suspended canopies can cause flow disturbances such as reducing velocities within the canopy, and increasing flow beneath the canopy. Flow modifications by canopies dramatically affect the fate and transport of sediment, nutrients, contaminants, dissolved oxygen, and fauna in aquatic systems. A three-zone model is presented here to predict the longitudinal dispersion coefficient by simplifying ...


    By IWA Publishing

  • Modeling Tip: Disabling Onsite and Offsite Receptors in BREEZE AERMOD

    The type of modeling analysis you are conducting will determine if you are interested in the highest offsite or onsite pollutant concentrations. For example, if you are modeling to show compliance with the U.S. EPA National Ambient Air Quality Standards (NAAQS), you will be interested in the concentrations that occur offsite, whereas if you want to show compliance with OSHA regulations you will ...

  • Tuning Your Boiler for EPA Boiler MACT Compliance

    The EPA’s Boiler MACT regulations are heating up. Boiler MACT is an EPA rule to limit hazardous air pollutants (HAP) from commercial and industrial boilers and process heaters. Originally proposed in 2011 as a mandate driven by the Clean Air Act,  the rules are Area Source Boiler MACT 40 CFR 63, subpart JJJJJJ for smaller boilers (stores, hotels, apartments, ...


    By Sierra Instruments, Inc.

  • Spatio-temporal evolutions of precipitation in the Yellow River basin of China from 1981 to 2013

    The partial thin plate smoothing splines method was applied to evaluate spatiotemporal trends of precipitation in the Yellow River basin from 1981 to 2013 by considering the basin's digital elevation model. Results indicate the following. (1) The spline method can greatly improve the spatial interpolation accuracy of meteorological data and can be applied to spatial modeling of meteorological ...


    By IWA Publishing

  • PureAire Universal Gas Monitor Receives UL Listing

    PureAire is pleased to announce that its PureAire Universal Gas Monitor received the UL/CUL listing for models 99030 and 99031. PureAire’s Universalmonitors comply with national and international safety standards, including UL 61010-1, CSA C22.2 NO. 61010-1-12-CAN/CSA, and IEC/EN 31010-1.  Designed to protect against toxic gases including ammonia, bromine, chlorine, hydrogen ...

  • Modeling Tip: Using Ozone File Editor Tools in BREEZE AERMOD

    To model 1-hour and annual concentrations of NO2 for the National Ambient Air Quality Standard (NAAQS), the U.S. EPA has approved a three-tiered approach as detailed in Section 5.2.4 of EPA’s Guideline on Air Quality Models, Appendix W to 40 CFR Part 511 (Appendix W). This approach, as shown below, is recommended to estimate the ambient concentrations of ...

Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you