nitrous oxide monitoring Articles
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Nitrous oxide emissions from a waterbody in the Nenjiang basin, China
Using static, closed chambers and gas chromatography techniques, nitrous oxide (N2O) emissions have been monitored for 1 year (2009–2010) on an inland running waterbody downstream of the Nenjiang basin, China. During the freezing period, holes were dug in the ice in order to obtain nitrous oxide samples. Here, we have focused on water-air gas exchange and factors which might influence ...
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Dinitrogen oxide (N2O) emission in the treatment of urban wastewater via nitrite: influence of liquid kinetic rates
N2O emission was studied in a continuous process via nitrite for real urban wastewater treatment. The relationship between the gaseous forms and the liquid kinetic rates of nitritation and denitritation was investigated. N2O mass load and global nitrogen mass balance were quantified. The emission factor of the N2O (gN2Oemitted/kg mixed liquor volatile suspended solids [MLVSS]/d) was ...
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The Crucial Need for Measuring Nitrous Oxide (N2O) Emissions from Wastewater Treatment Plants
Wastewater treatment plants are indispensable infrastructures for maintaining public health and environmental quality. However, these facilities are not only responsible for purifying water; they also emit significant amounts of greenhouse gases, including nitrous oxide (N2O). Despite its potency as a greenhouse gas, the monitoring and measurement of N2O emissions from wastewater treatment plants ...
By XPRT
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Multi-point monitoring of nitrous oxide emissions in three full-scale conventional activated sludge tanks in Europe
The large global warming potential of nitrous oxide (N2O) is currently of general concern for the water industry, especially in view of a new regulatory framework concerning the carbon footprint of water resource recovery facilities (WRRFs). N2O can be generated through different biological pathways and from different treatment steps of a WRRF. The use of generic emission factors (EF) for ...
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The Cost of Using Global Warming Potentials: Analysing the Trade off Between CO2, CH4 and N2O
Abstract The metric governing the trade-off between different greenhouse gases in the Kyoto Protocol, the Global Warming Potentials (GWPs), has received ample critique from both scientific and economic points of view. Here we use an integrated climate-economic optimization model to estimate the cost-effective trade-off between CO2, CH4 and N2O when meeting a temperature stabilization target. We ...
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Evaluation of an operational method for the estimation of emissions of nitrogen compounds for a group of farms
The aim of this article is to evaluate a practical method for estimating nitrogen emissions on the scale of a group of farms, to be used in Life Cycle Assessment (LCA). The method rests on the estimation of nitrogen inputs and outputs to calculate the surplus of the annual nitrogen balance on the scale of a farm. The different gaseous nitrogen losses (NH3, NO, N2O, N3) are then estimated for each ...
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Effects of 17β‐estradiol on emissions of greenhouse gases in simulative natural water body
Environmental estrogens (EEs) are widely spread across the world and becoming more and more seriously contaminating. This paper studies the influence of different concentrations of 17β‐estradiol (E2) on the emissions of main greenhouse gases (CO2, CH4 and N2O) in simulative systems in order to explore the relationship between EEs pollution and greenhouse gases emissions in natural water bodies ...
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What are Scope 1, 2, and 3 Greenhouse Gas Emissions?
A greenhouse gas (GHG) is a gaseous compound with the ability to trap heat (or longwave radiation) in the Earth’s atmosphere. This results in high temperatures being retained in the lower atmosphere, thus allowing less heat to escape back to space. Common GHGs present in the atmosphere include fluorinated gases (chlorofluorocarbons (CFCs) (e.g., tetrafluoromethane (CF4)) and ...
By WKC Group
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Description and application of the EAP computer program for calculating life-cycle energy use and greenhouse gas emissions of household consumption items
Focusing on reduction in energy use and greenhouse gas emissions, a life-cycle-based analysis tool has been developed. The energy analysis program (EAP) is a computer program for determining energy use and greenhouse gas emissions related to household consumption items, using a hybrid calculation method. EAP consists of a number of fill-in screens corresponding to steps in the hybrid method, ...
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Impacts of Novel Protein Foods on Sustainable Food Production and Consumption: Lifestyle Change and Environmental Policy
We analyse the impacts of a change in consumers’ preference for Novel Protein Foods (NPFs), i.e. a lifestyle change with respect to meat consumption, and the impacts of environmental policies e.g. tradable emission permits for greenhouse gases (GHGs) or an EU ammonia (NH3) emission bound per hectare. For our analysis we use a global applied general equilibrium (AGE) model that includes consumers’ ...
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Effect of COD/N ratio on N2O production during nitrogen removal by aerobic granular sludge
N2O-production was investigated during nitrogen removal using aerobic granular sludge (AGS) technology. A pilot sequencing batch reactor (SBR) with AGS achieved an effluent in accordance with national discharge limits, although presented a nitrite accumulation rate of 95.79% with no simultaneous nitrification–denitrification. N2O production was 2.06 mg L−1 during the anoxic phase, with N2O ...
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N2O emissions from a one stage partial nitrification/anammox process in moving bed biofilm reactors
Nitrous oxide (N2O) emissions from wastewater treatment are getting increased attention because their global warming potential is around 300 times that of carbon dioxide. The aim of the study was to measure nitrous oxide emissions from one stage partial nitrification/anammox (Anaerobic Ammonium Oxidation) reactors, where nitrogen is removed in a biological way. The first part of the ...
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EPA moves closer to GHG control
EPA has put itself on the path toward greenhouse gas regulation, but in Congress, the courts, and the international community, the debate rages on. On Dec. 7, 2009, EPA moved one step closer to imposing the first ever set of enforceable greenhouse gas (GHG) standards on tailpipe emissions from vehicles, and a requirement that large power plants and industrial emitters install best available ...
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Global Warming Potential, CO2 Equivalence and the Impacts of Fossil Fuel Combustion
A greenhouse gas (GHG), as defined by the Intergovernmental Panel on Climate Change (IPCC) is a compound which has the ability to trap heat over a certain lifetime in the atmosphere. The six main GHG gases are carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), hydrofluorocarbons (HFCs), perfluorocarbons (PFCs) and sulphur hexafluoride (SF6). The impact of these GHG gases is quantified ...
By WKC Group
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Nitrous oxide emission from agricultural soils
Anthropogenic nitrogen loading, particularly fertiliser usage in agricultural soils is thought to be a potentially important source of nitrous oxide (N2O) emission, which can be controlled by properly managed fertiliser usage. In this research, laboratory scale experiments were conducted to evaluate N2O production and emission from agricultural soils under variable oxygen availability conditions. ...
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Nitrous oxide emission from the littoral zones of the Miyun Reservoir near Beijing, China
Large dams may be substantial contributors to greenhouse gas emissions. Nitrous oxide (N2O) is the third most important greenhouse gas but studies on N2O emission from reservoirs are limited. We measured N2O emissions and environmental factors including atmospheric pressure, wind speed, air and soil/sediment temperature, biomass, soil water content and organic matter, total nitrogen, NH4+-N ...
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How to measure greenhouse gas soil fluxes
Introduction to Greenhouse Gas Monitoring The natural emissions of Greenhouse Gases (GHGs), such as carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O) can be disturbed by human activities and pose an enormous environmental threat. The measurement of GHG fluxes which exist between soil surfaces and the local atmosphere is critical to understanding the impact that human activity is having ...
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Quantitative analysis of automotive exhaust gas by Fourier Transform Infrared spectroscopy
For monitoring gaseous emissions from muffler, instruments presently used can only measure quantitatively a given pollutant. Fourier Transform Infrared (FTIR) spectroscopy can provide quantitative and online real time analysis. Calibration of our FTIR spectrometer with CO, CO2, NO, NO2 and N2O was done and the limits of quantification obtained were shown to be as low as 80 ppm. The variation ...
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Nitrous oxide (N2O) emissions from biotrickling filters used for ammonia removal at livestock facilities
Recently several manufacturers of nitrifying biotrickling filters for ammonia (NH3) removal at animal houses have started to add a denitrification step to the installation, aiming to reduce the amount of discharge water by conversion of NH3 to nitrogen gas (N2). The aim of this research was to quantify the possible formation of nitrous oxide (N2O), which is a potent greenhouse gas, in three of ...
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Field Evaluation of a Method for Estimating Gaseous Fluxes from Area Sources Using Open-Path Fourier Transform Infrared
This paper describes results from the first field experiment designed to evaluate a new approach for quantifying gaseous fugitive emissions of area air pollution sources. The approach combines path-integrated concentration data acquired with any path-integrated optical remote sensing (PI-ORS) technique and computed tomography (CT) technique. In this study, an open-path Fourier transform infrared ...
By Arcadis
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