Emissions Modeling Articles
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Selecting the Right Straddle Carrier Manufacturer
The selection of the right straddle carrier manufacturer is a pivotal decision for businesses involved in material handling and container logistics. Straddle carriers are vital assets for efficiently moving heavy containers within ports, terminals, and distribution centers. A well-informed choice in manufacturer can result in increased productivity, reduced operational costs, and enhanced safety. ...
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Your local waste management operation spends more time on odour management than you think
When it comes to odour management at landfills, it’s widely accepted that prevention is better than a cure. Any possibility of slightly reducing odour impact can save navigating the fallout of a disruptive situation for waste management operations and local communities. However, odour is notoriously difficult to measure and manage. Moreover, limiting the impact of offensive odours is a ...
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The harm of ammonia gas and the treatment principle of ammonia gas scrubber
Ammonia is the most abundant alkaline gas in the atmospheric environment and plays an important role in the atmospheric environment and ecosystem. On the one hand, ammonia gas can promote the formation of sulfate and nitrate and increase the concentration of fine particulate matter (PM2.5) in the atmosphere, and on the other hand, it can neutralize atmospheric acidic substances and reduce the ...
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Controlling Gas Mixture for Minimum Emissions
Continental Controls Corp. (CCC), based in San Diego, California, has introduced an emissions control valve, the model ECV-5, that is designed to control the air-fuel mixture of natural gas-fueled, reciprocating engines. CCC said the ECV-5 controls the air-fuel ratio in a closed loop manner, works with an oxygen sensor, is located in the exhaust, and has a three way catalytic converter. The ECV-5 ...
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Digitising dust management strategies at open pit mine sites
Dust management is one of the most pervasive tasks that affects multiple teams at an open pit mine site. If the weather conditions are right, most routine activities at mining operations can lead to dust events. Fugitive dust emissions produce a serious health risk for workers across the site but also for surrounding communities in the vicinity of the operation. Particulate matter (PM) ...
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What are clean air zones and how do they affect HGV drivers?
Clean Air Zones are popping up more and more around the country in order to try and reduce the pollution in the area. This means that charges are put in place for certain vehicles that want to pass through the zone. For many, this can be avoided, but for HGV drivers, this could be a difficult and costly minefield to negotiate. Whilst the importance of Clean Air Zones is clear, the impact on those ...
By Fleetex
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‘SPAIN CIRCULAR 2030’: GREEN LIGHT FOR THE STRATEGY TO ADVANCE TOWARDS A SUSTAINABLE AND COMPETITIVE ECONOMY
Circular Economy concept is here to stay. And it is that every time it is clearer that, if not, the whole planet could have an irremediable problem. Previously, we told how PlasticsEurope had come into action in this regard. The business association representing active polymer manufacturers in the plastics sector in Europe published the report “The circular economy of plastics – A European ...
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Odour Monitoring at Dumpyard Using Odosense - Case Study
Oizom assisted ESS Enviro to solve the perpetual problem of foul smell from one of the Mumbai's landfill site, Kanjurmarg Dumpyard, which was becoming detrimental to people residing near Vikhroli and Bhandup. Oizom installed Odosense in the peripheral area to monitor odourful gases such as CO, NO2, NH3, H2S, SO2, VOC, CH2O, etc generated from the waste. The solution provided real-time odour ...
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A mathematical approach for the analysis of data obtained from the monitoring of biocides leached from treated materials exposed to outdoor conditions
Leaching processes are responsible for the release of biocides from treated materials into the environment. Adequate modeling of emission processes is required in order to predict emission values in the framework of the risk assessment of biocidal products intended for long-term service life. Regression approaches have been applied to data obtained from the long-term monitoring of biocide ...
By QuoData GmbH
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Sources and physicochemical characteristics of black carbon aerosol from the southeastern Tibetan Plateau: internal mixing enhances light absorption
Abstract. Black carbon (BC) aerosol has important effects on the climate and hydrology of the Tibetan Plateau (TP). An intensive measurement campaign was conducted at Lulang ( ∼ 3300 m a.s.l. – above sea level), southeastern TP, from September to October 2015, to investigate the sources and physicochemical characteristics of refractory BC (rBC) aerosol. The average rBC mass ...
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Emission of hydrogen sulfide (H2S) at a waterfall in a sewer: study of main factors affecting H2S emission and modeling approaches
Hydrogen sulfide (H2S) represents one of the main odorant gases emitted from sewer networks. A mathematical model can be a fast and low-cost tool for estimating its emission. This study investigates two approaches to modeling H2S gas transfer at a waterfall in a discharge manhole. The first approach is based on an adaptation of oxygen models for H2S emission at a waterfall and the second ...
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Urban eddy covariance measurements reveal significant missing NOx emissions in Central Europe
Abstract Nitrogen oxide (NOX) pollution is emerging as a primary environmental concern across Europe. While some large European metropolitan areas are already in breach of EU safety limits for NO2, this phenomenon does not seem to be only restricted to large industrialized areas anymore. Many smaller scale populated agglomerations including their surrounding rural areas are seeing frequent NO2 ...
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Influence of relative air/water flow velocity on oxygen mass transfer in gravity sewers
Problems related to hydrogen sulfide may be serious for both network stakeholders and the public in terms of health, sustainability of the sewer structure and urban comfort. H2S emission models are generally theoretical and simplified in terms of environmental conditions. Although air transport characteristics in sewers must play a role in the fate of hydrogen sulfide, only a limited number ...
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Geotech’s first GA5000 landfill gas analyser takes 100,000 readings for SUEZ environnement - Case Study
Geotech’s first GA5000 analyser, manufactured three years ago, was recently spotted in the company’s calibration rig. This portable landfill gas monitor was the first production unit of the newly launched GA5000 gas analyser range and has prompted Geotech to look into the analyser’s life since then. The analyser was on its sixth service since manufacture, under Geotech’s ...
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Comparison of different two-pathway models for describing the combined effect of DO and nitrite on the nitrous oxide production by ammonia-oxidizing bacteria
The aim of this work is to compare the capability of two recently proposed two-pathway models for predicting nitrous oxide (N2O) production by ammonia-oxidizing bacteria (AOB) for varying ranges of dissolved oxygen (DO) and nitrite. The first model includes the electron carriers whereas the second model is based on direct coupling of electron donors and acceptors. Simulations are confronted ...
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Air quality assessment in the EU: room for improvement?
Different modelling approaches are used to design and assess air quality plans across Europe. This study assessed the strengths and weaknesses of these different approaches. The researchers conclude that a large variety of models is in use, without a preferred or standard model having emerged yet. They identify integrating local-scale and large-scale models and verifying models with measurements ...
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Northern shipping: Is the anticipated climate boost a bust?
Visions of safe passage for cargo ships across the Arctic between Europe and Asia have sprung up in recent years as ice-free zones have appeared along the northern coasts of Russia and Canada. Some shipping companies already have begun taking advantage of the change. But dreamers and schemers may want to think twice about the long-term promise of the so-called Northern Sea Route for boosting ...
By Ensia
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Car emissions: taking tests out of the lab and onto the road
Every year 430,000 Europeans die prematurely due to air pollution. One of the main sources is road vehicles emitting nitrogen oxides (NOx), including poisonous nitrogen dioxide. Following the Volkswagen scandal, in which the company admitted cheating emission test in the US, Parliament and the Council are considering to update existing emission rules to ensure tests are closer to real driving ...
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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 ...
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BREEZE is the market-leading air dispersion modeling software used by environmental professionals around the world
While most air dispersion modeling is conducted using meteorological data from recent past years and historical or projected emissions data, models can also be used with real-time or short-term forecast meteorological and emissions data to estimate impacts at the present time and in the near future. In order to develop these custom real-time air dispersion modeling and forecasting systems, ...
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