nitrous oxide Articles
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Nitrous oxide emissions from one-step partial nitritation/anammox processes
Measurements of nitrous oxide were made at pilot- and full-scale plants to evaluate greenhouse gas emissions from one-step partial nitritation/anammox processes applied in moving bed biofilm reactors treating reject water. It was found that 0.51–1.29% and 0.35–1.33% of the total nitrogen loads in the pilot- and full-scale reactor, respectively, were emitted as nitrous oxide. Between 80 and ...
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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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Nitrous Oxide Detector: The Importance of Monitoring Nitrous Oxide
Most of us are highly aware of the dangers common gases can cause; however, nitrous oxide is one with less coverage and familiarity. This article will explore what nitrous oxide is, what it does, its uses, nitrous oxide side effects, and the importance of nitrous oxide measurement. At Edinburgh Sensors we can help keep you safe from nitrous oxide with our nitrous oxide detector.What is Nitrous ...
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Nitrous Oxide 300 Times More Harmful than Carbon Dioxide
Wastewater treatment choices can reduce emissions of the potent greenhouse gas The harmful effects of carbon dioxide on the atmosphere are well known, but another greenhouse gas, nitrous oxide, does considerably more damage to the environment. Many human activities, including wastewater treatment, release nitrous oxide into the atmosphere. This is particularly alarming in light of a 2020 study ...
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Options to Reduce Nitrous Oxide Emissions
This study assesses nitrous oxide (N2O) emissions in the EU and strategies to control them. It considers in detail options for reducing emissions from the agricultural and chemical sectors, and emissions from combustion processes, and assesses their cost-effectiveness and potential reductions, which could be achieved. The study also makes projections of N2O emissions up to 2020 under a ‘business ...
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Methane and nitrous oxide emissions from municipal wastewater treatment – results from a long-term study
Methane and nitrous oxide emissions from a fully covered municipal wastewater treatment plant were measured on-line during 16 months. At the plant under study, nitrous oxide contributed three-quarters to the plant's carbon footprint, while the methane emission was slightly larger than the indirect carbon dioxide emission related to the plant's electricity and natural gas ...
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The Big Three - On-line monitoring of green house gases
ABSTRACT National emissions regulations have historically targeted the common stack gas pollutants which have long been known to cause damage to health or ecology, but there is growing concern about the long term effects on the world’s climate from what were hitherto less obvious pollutants. The Kyoto Protocol has identified six gaseous pollutants as “green house gases” and the ...
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Impurity detection in Nitrous Oxide (N2O) manufacturing in the Chinese Semiconductor market by ECO PHYSICS’s nCLD844CMhr N2O edition
“Special gases” consist of high-purity, electronic and standard gases. Especially the electronic gases are a vital raw material for the electronic industrial production, such as integrated circuits, display devices or solar cells. Besides being a weak anesthetic gas, for instance in the context of dentistry, Nitrous Oxide (N2O) is also essential for the Semiconductor production ...
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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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Climate Change Mitigation and Water
Both natural and anthropogenic processes contribute significantly to climate change. Among the natural processes are changes in the energy emitted from the sun, the distance between the sun and the earth, and eruptions from volcanoes. The main anthropogenic processes include emissions of greenhouse gasses such as methane (CH4), nitrous oxide (N2O), and ...
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Nitrous oxide's impact on net greenhouse gas savings from biofuels: life-cycle analysis comparison
We discuss the likely impact of agricultural fertiliser N use on the global nitrous oxide (N2O) budget, as described by Crutzen et al. (2008). We then project the impact of full N2O accounting in biofuel net Greenhouse Gas (GHG) emissions using the life-cycle analyses from Farrell et al. (2006) (ERG Biofuels Analysis Meta-Model (EBAMM)), Liska et al. (2008) (Biofuel Energy Systems Simulator ...
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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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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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Assessment of copper-iron catalyst supported on activated carbon for low-temperature nitric oxide reduction by hydrogen
Increasing emissions of nitrogen oxides associated with global industrialization necessitates the development of more sustainable NOx-removal systems. This research focused on synthesizing and testing catalytic materials, derived from biomass waste and Earth-abundant metals. These materials were sufficiently reactive to convert NOx into nitrogen, employing hydrogen as the reductant. A catalytic ...
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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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Economic Evaluation of Quantitative Objectives for Climate Change
This study identifies the least-cost packages of specific policies and measures for meeting the Community's quantitative reduction targets for greenhouse gases under the Kyoto Protocol. The study analyses separately carbon dioxide, methane and nitrous oxide emissions, and how the different sectors of the economy (i.e. power production, industry, tertiary-domestic, transport, waste sector and ...
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Denitrifying kinetics and nitrous oxide emission under different copper concentrations
Denitrifying activities and nitrous oxide (N2O) emission during denitrification can be affected by copper concentrations. Different denitrifiers were acclimated in sequencing batch reactors with acetate or methanol as the electron donor and nitrate as the electron acceptor. The effect of copper concentrations on the denitrifying activity and N2O emission for the acclimated denitrifiers was ...
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Study of vehicular emissions with reference to Pakistan's National Environmental Quality Standards: case study of District Swat, North of Pakistan
This study was conducted during 2011–2012 with the objective to assess the ambient air quality in the surroundings of a newly constructed road in relation to Pakistan's Environmental Quality Standard (Pak–NEQS). The area was monitored twice, before and during the construction, to determine levels of sulphur dioxide, nitrous oxide, carbon monoxide, and PM10 (particulate matter). A ...
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Nitrous oxide (laughing gas) - Case Study
Example: Uranium enrichment Similar tasks: Nitric acid caprolactam production When uranium ore is converted into uranium hexafluoride (UF6) for uranium enrichment employing the diffusion process, or also when producing nitric acid and nitrogenous fertilizers for farming, laughing gas is produced by several undesirable side reactions. Thermal decomposition of nitrous oxide (N2O) implies the ...
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Accuracy and precision analysis of chamber-based nitrous oxide gas flux estimates
Chamber-based estimates of soil-to-atmosphere nitrous oxide (N2O) gas flux tend to underestimate actual emission rates due to inherently nonlinear time series data. In theory, this limitation can be minimized by adjusting measurement conditions to reduce nonlinearity and/or by using flux-calculation (FC) schemes that account for the so-called 'chamber effect.' The current study utilizes gas ...
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