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Methane Emissions from Vehicles
Environmental Science & Technology, 2004Methane (CH4) is an important greenhouse gas emitted by vehicles. We report results of a laboratory study of methane emissions using a standard driving cycle for 30 different cars and trucks (1995-1999 model years) from four different manufacturers. We recommend the use of an average emission factor for the U.S.
E K, Nam, T E, Jensen, T J, Wallington
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Science of The Total Environment, 2015
Recent studies have shown that sewer systems produce and emit a significant amount of methane. Methanogens produce methane under anaerobic conditions in sewer biofilms and sediments, and the stratification of methanogens and sulfate-reducing bacteria may explain the simultaneous production of methane and sulfide in sewers.
Liu, Yiwen +3 more
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Recent studies have shown that sewer systems produce and emit a significant amount of methane. Methanogens produce methane under anaerobic conditions in sewer biofilms and sediments, and the stratification of methanogens and sulfate-reducing bacteria may explain the simultaneous production of methane and sulfide in sewers.
Liu, Yiwen +3 more
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Journal of Animal Science, 1995
Increasing atmospheric concentrations of methane have led scientists to examine its sources of origin. Ruminant livestock can produce 250 to 500 L of methane per day. This level of production results in estimates of the contribution by cattle to global warming that may occur in the next 50 to 100 yr to be a little less than 2%.
K A, Johnson, D E, Johnson
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Increasing atmospheric concentrations of methane have led scientists to examine its sources of origin. Ruminant livestock can produce 250 to 500 L of methane per day. This level of production results in estimates of the contribution by cattle to global warming that may occur in the next 50 to 100 yr to be a little less than 2%.
K A, Johnson, D E, Johnson
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Chemosphere, 1999
A physico-chemical model to describe methane and carbon dioxide emission from lakes was developed. The model describes the emission by diffusion, bubbles and plants. The intensity of the fluxes can be calculated either for total or particular emission in dependence on gas bubbles composition.
G A, Makhov, N M, Bazhin
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A physico-chemical model to describe methane and carbon dioxide emission from lakes was developed. The model describes the emission by diffusion, bubbles and plants. The intensity of the fluxes can be calculated either for total or particular emission in dependence on gas bubbles composition.
G A, Makhov, N M, Bazhin
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Science of The Total Environment, 2022
Recent greenhouse gas (GHG) inventories carried out in The Republic of Benin have shown that cattle are the major emitters of livestock-related GHG. Due to the unavailability of national emission factors (EF), most of the previous GHG inventories were conducted according to the Tier 1 method based on the use of default EF suggested by the ...
Dehouegnon Jerry, Agossou +1 more
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Recent greenhouse gas (GHG) inventories carried out in The Republic of Benin have shown that cattle are the major emitters of livestock-related GHG. Due to the unavailability of national emission factors (EF), most of the previous GHG inventories were conducted according to the Tier 1 method based on the use of default EF suggested by the ...
Dehouegnon Jerry, Agossou +1 more
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Methane emissions from wastewater management
Environmental Pollution, 2001Greenhouse gas emissions in the form of methane and carbon dioxide are produced when municipal and industrial wastewater and their residual solid by-product (sludge) are handled under or subject to anaerobic conditions, thus contributing to the global warming potential or the greenhouse effect.
El Fadel, M., Massoud, M.
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Methane emissions from MBT landfills
Waste Management, 2013Within the scope of an investigation for the German Federal Environment Agency ("Umweltbundesamt"), the basics for the estimation of the methane emissions from the landfilling of mechanically and biologically treated waste (MBT) were developed. For this purpose, topical research including monitoring results regarding the gas balance at MBT landfills ...
K-U, Heyer, K, Hupe, R, Stegmann
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Estimates of animal methane emissions
Environmental Monitoring and Assessment, 1996The enteric methane emissions into the atmospheric annually from domestic animals total about 77 Tg. Another 10 to 14 Tg are likely released from animal manure disposal systems. About 95% of global animal enteric methane is from ruminants, a consequence of their large populations, body size and appetites combined with the extensive degree of anaerobic ...
D E, Johnson, G M, Ward
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