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Showing 1 to 20 of 27 for “"ammonia emissions"”.
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Vehicular Ammonia Emissions in Baltimore, Maryland
Atmospheric ammonia is a precursor to the formation of fine particulate matter, which contributes to human health problems and decreased visibility. Atmospheric ammonia may also be transported through wet and dry deposition to water bodies such as the Chesapeake Bay, contributing to excess nutrient …
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Ammonia emissions and pathogen inactivation during controlled composting of pig manure
… ration and pH of pig manure and straw mixes on ammonia emissions and pathogen marker inactivation during composting were investigated by experimentation and modelling. Three, 210-litre reactors were designed and built to control conditions, such as the maximum operating temperature, minimise …
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Mitigation of Ammonia Emissions from Broiler Houses Using a Biodegradable Litter Amendment
… farms with bedding/litter to trap their manure. Ammonia gas, which is produced as the manure decomposes, has adverse effects on human health, bird welfare and the environment. Using litter amendments can reduce the amount and, consequently, the effects of ammonia emitted from broiler houses. The …
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Reduction of ammonia emissions by applying a urease inhibitor in fattening pig houses
Ammonia emissions have a negative impact on the environment due to acidification and eutrophication. In Germany, more than 92% of emissions come from agricultural production. European efforts are underway to regulate ammonia emissions. One measure to reduce ammonia emissions is the use of a urease …
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Ammonia Emissions from Dairy Manure Storage Tanks Affected by Diets and Manure Removal Practices
… objectives of this study were to determine: 1) ammonia emission rates from stored scraped and flushed manure from dairy cows fed either normal or low N diet; and 2) seasonal effects on ammonia emission rates from stored scraped and flushed dairy manure. Four pilot-scale tanks were used for …
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Development of a Python-based Data Assimilation Framework (PyDAF). Case Study: Refining Ammonia Emissions Through Observation Data
… contributions up to four days ahead. Korean emissions contributed 31.1 ppb, while emissions from Shandong, the Yangtze River Delta, Central China, and Beijing-Tianjin-Hebei contributed 11.42, 4.28, 1.24, and 0.9 ppb, respectively, with 19.3 ppb from background O3 beyond eastern China. In the …
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Development of a Python-based Data Assimilation Framework (PyDAF). Case Study: Refining Ammonia Emissions Through Observation Data
… contributions up to four days ahead. Korean emissions contributed 31.1 ppb, while emissions from Shandong, the Yangtze River Delta, Central China, and Beijing-Tianjin-Hebei contributed 11.42, 4.28, 1.24, and 0.9 ppb, respectively, with 19.3 ppb from background O3 beyond eastern China. In the …
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ANALYSIS OF AMMONIA RELEASE AND BEST AVAILABLE PRACTICES TO SUPPORT FARM MANAGEMENT IN THE REDUCTION OF AMMONIA EMISSIONS IN DAIRY HOUSES
… of this thesis work was to verify the levels of ammonia concentrations in different functional areas of naturally ventilated dairy houses, through the measurement of the concentrations of ammonia at different heights from the floor of the breeding environment, also in relation to the main inside …
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Impact of spatial and temporal distribution of ammonia emissions from chemical fertilizer usage on predictions of air quality in the Midwest United States
Ammonia (NH3) is a precursor to ambient particulate matter (PM). PM is regulated to protect human health and visibility. Atmospheric deposition of NH3 and other reactive nitrogen compounds exacerbates surface water eutrophication, soil acidity and ecosystem damages. Accurate prediction of impacts …
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Experimental manure handling systems for reducing airborne contamination
… conveyor belt used directly as a dunging area. Ammonia emissions were used as a measure of the air contamination originating from the excreta in two experimental chambers. Ammonia originates only from the manure and is released quickly from any manure (especially urine) in contact with the air. …
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Exploring interactions between agriculture and air quality on regional to global scales
… importance of the variability in agricultural ammonia emissions on surface inorganic fine PM (PM₂.₅). In a case study, airborne observations indicate that summertime concentrations of ammonia throughout California and PM₂.₅ in Los Angeles are underestimated in a global chemistry model …
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Integrating Machine Learning Into Process-Based Modeling to Predict Ammonia Losses From Stored Liquid Dairy Manure
… environmental pollution challenges. However, ammonia loss through volatilization during storage remains a challenge. Quantifying these losses is necessary to inform decision-making processes to improve manure management, and design ammonia mitigation strategies. In 2003, the National Research …
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The Effects of Manure Handling and Dietary Protein on Ammonia Fluxes from a Flush Dairy
Atmospheric ammonia (NH₃(g)) poses an environmental concern mainly due its ability to form fine particulate matter (PM2.5 with a diameter smaller than 2.5 micrometers) in the form of ammonium nitrate (NH₄NO₃) and ammonium sulfate ([NH₄]₂SO₄). These forms of PM2.5 may reduce visibility, contribute …
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Ecosustainable biomethane and fertilizerproduction through anaerobic co-digestionof animal manure and energy crops
… and local scale coming from new polluting emissions. The environmental balances regarding new energy plants are of primary importance within very polluted areas such as Northern Italy where air quality limits are systematically exceeded, in particular for PM10, NO2 and ozone. The most …
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Estimating Costs of Reducing Environmental Emissions From a Dairy Farm: Multi-objective epsilon-constraint Optimization Versus Single Objective Constrained Optimization
… is an important source of environmental emissions. While water quality concerns related to animal agriculture have been studied extensively, air quality issues have become an increasing concern. Due to the transfer of nutrients between air, water, and soil, emissions to air can harm water …
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An Investigation of Local and Regionally Significant Non-Agricultural Sources of Ammonia in Toronto and the Great Lakes Region
Atmospheric ammonia is a significant environmental pollutant that contributes both to human mortality and morbidity and can also negatively influence ecosystem health. While the globally dominant source of ammonia pollution is agriculture, other sources may be influential on local and regional …
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Compartmental Process-based Model for Estimating Ammonia Emission from Stored Scraped Liquid Dairy Manure
… responsible for production and emission of ammonia from stored liquid dairy manure are governed by environmental factors (e.g. manure temperature, moisture) and manure characteristics (e.g. total ammoniacal nitrogen concentration, pH). These environmental factors and manure characteristics …
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Characterization of the composition and toxicity of particulate matter emissions from advanced heavy-duty natural gas engines
… natural gas engines compliant with the 2010 EPA emissions standards have a clear advantage over diesel engines in meeting regulations with minimal after-treatment configuration. Heavy-duty natural gas engines are largely promoted as a cleaner burning engine with respect to low PM mass emissions. …
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Valoración energética del residuo avícola, impacto económico-ambiental y análisis experimental en Europa de la reducción de amoniaco en explotaciones avícolas mediante compuesto encimático
… some potential risks to the environment due to emissions of greenhouse gases, acid rain and other pollutants. Consequently European policies are focused on environmental protection, sustainable agricultural and livestock production, and particularly to the health and welfare of animals intended …
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Evaluación técnica del sistema multifondo móvil regulable bajo enrejillado parcial en porcino de cebo
… animal welfare and health are affected by ammonia emissions from slurry storage under the slatted floor. To resolve these problems, since several years ago, various research groups have developed separation systems of faeces and urine through the use of a belt bellow the partially slatted …
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