methane Articles
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Closed DHS system to prevent dissolved methane emissions as greenhouse gas in anaerobic wastewater treatment by its recovery and biological oxidation
Anaerobic wastewater treatment has been focused on its eco-friendly nature in terms of the improved energy conservation and reduction in carbon dioxide emissions. However, the anaerobic process discharges unrecovered methane as dissolved methane. In this study, to prevent the emission of dissolved methane from up-flow anaerobic sludge blanket (UASB) reactors used to treat sewage and to recover it ...
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A preliminary study of the application of Background Oriented Schlieren (BOS) for the qualitative imaging of methane emissions from coal
Methane presents a pervasive risk in most coal mines, its dilution being one of the primary objectives of the ventilation system. Although many different types of detectors and techniques exist for quantifying methane, little is known about the qualitative aspects of methane, such as visualising how this gas flows from coal. Background Oriented Schlieren (BOS) provides a potential method from ...
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Effect of methane generation potential and rate constant on the generation of methane from municipal solid waste landfill site: a case study
The methane generation potential L o and methane generation rate constant k are the two important parameters which have been used for methane generation evaluation. An attempt has been made in the present research paper to evaluate the methane generation at Pirana landfill site of Ahmedabad by varying the values of methane generation potential L o and methane generation rate ...
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Measurements of Methane Emissions and Surface Methane Oxidation at Landfills: WR1125
Methane emissions from landfill were estimated to account for around 3% of the UK‟s total greenhouse gas emissions in 2009. The reported figure for methane emissions from landfill in the UK represents 41.5% of all UK methane emissions. The IPCC guidelines indicate that measurement of methane emissions is necessary to validate models and to provide confidence in country specific model ...
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Strategy Paper for Reducing Methane Emissions
The Strategy Paper for reducing methane emissions,which has just been approved by the Commission, describes the contribution man-made methane emissions, both at the global and European level, are making to the greenhouse effect and global warming. Although the focus in the global climate debate has often been on CO2 emissions, the major greenhouse gas, it needs to be underlined that methane is ...
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Comparative assessment of anaerobic digestion of municipal solid waste at mesophilic and thermophilic temperatures
Anaerobic digestion is an environmentally sound treatment option for the organic fraction of municipal solid waste (OFMSW) and simultaneously producing methane gas which is a source of renewable energy. The COD reduction of the substrate was 72% for the mesophilic condition and 72.3% for the thermophilic condition. 1200 cm³ of methane was produced in the mesophilic condition and 1260 cm³ in the ...
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Application of CH4 gas sensor
introduction Methane gas is an odorless, colorless, highly flammable gas commonly found in natural gas, biogas, and landfill gas. It is also a potent greenhouse gas that contributes to climate change. Therefore, monitoring and detecting methane gas leaks is critical to prevent potential hazards and environmental damage. The CH4 gas sensor detects and measures the concentration of methane gas in ...
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Compost as a landfill cover material for the elimination of methane emissions
Landfills, with about 40 - 60 Mio t emitted CH4 each year, are considered to be an important global source of the greenhouse gas methane. These emissions are especially caused by inadequate gas collection systems and uncontrolled emissions from old dumps and unauthorised open dumping. With traditional gas collection systems only 40 to 60 % of the produced gas can be collected and reused or safely ...
By ORBIT e.V.
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Error analyses in volumetric method for measuring methane and CO
2adsorption on coalCO2 sequestration in deep coal seams with enhanced coalbed methane recovery (CO2–ECBM) is emerging as a promising option to stabilise CO2 concentration in the atmosphere. Volumetric method for measuring methane and CO2 adsorption on coal can generate the critical information of the coalbed methane recovery and CO2 storage amount of the target coal seams. In this work, the potential sources of ...
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Regeneration of Palladium Catalyst for Methane Abatement
Abstract: The exhaust gas of lean burn gas engines contains significant amounts of unburnt methane gas. Since methane is a strong greenhouse gas, reducing methane emissions would greatly improve the environment and provide greenhouse gas emissions credits. Oxidation catalysts containing platinum are commonly used for the elimination of non-methane hydrocarbons (all hydrocarbons except methane). ...
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Sewage sludge treatment: evaluation of the energy potential and methane emissions with COD balancing
Sewage sludge is an important resource for the generation of electricity and heat within a wastewater treatment plant (WWTP). Taking a holistic approach to such use involves considering the greenhouse gas emissions. In particular, for anaerobic sludge treatment, methane emissions are a matter of concern. Therefore, the utilization of a carbon balance, based on the chemical oxygen demand ...
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Puzzle remains over source of Amazonian methane
Remote sensing observations have shown high methane concentrations in the troposphere above tropical forests in Venezuela and Brazil and scientists claim to have measured significant amounts of methane being emitted aerobically from the leaves of plants during photosynthesis. Recent experiments have been unable to reproduce these controversial results. Detailed knowledge of the global ...
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Mitigating methane emissions from passive landfill vents: a viable option for older closed landfills
This study investigated the use of biofilters to reduce methane emissions from landfill passive gas vents. Two biofilter designs were evaluated. The two filter designs achieved similar percent oxidation averages. The radial biofilter design, however, obtained a much higher methane oxidation rate. The higher surface area of flow in the radial biofilters decreased the methane influx leading to ...
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New Study Raises Big Questions on U.S. Fugitive Methane Emissions
A new study in the Proceedings of the National Academy of Sciences sheds light on a question that continues to vex industry executives and policymakers alike: How significant are fugitive methane emissions from oil and gas production? The study claims that U.S. methane emissions may be as much as 50 percent higher than estimates in the Environmental Protection Agency’s (EPA) annual ...
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Polish gas from Polish coal: environmental benefits
The development of coalbed methane gas from Polish coal offers a significant opportunity to reduce noxious pollutant emissions associated with coal combustion. A review of energy supply and consumption within Poland, and of available coalbed methane resources, indicates that use of coalbed methane could eliminate 40-60 million tonnes of sulfur dioxide and particulates from the atmosphere, save ...
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Quantification of dissolved methane in UASB reactors treating domestic wastewater under different operating conditions
This paper aimed at measuring the concentration of methane dissolved in effluents from different UASB reactors (pilot-, demo- and full-scale) treating domestic wastewater, in order to calculate the degree of saturation of such greenhouse gas and evaluate the losses of energetic potential in such systems. The results showed that methane saturation degrees, calculated according to Henry's law, ...
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Methane Mining
The Customer The Company is a global manufacturer of web handling, air flotation drying, process thermal management and emission control systems. They serve the web coating, printing, packaging and other industrial process markets. The Process The site is a coal mine that has been closed for a number of years, ostensibly because most or all of the available coal reserves have been extracted. ...
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Demonstration of an Ethane Spectrometer for Methane Source Identification
ABSTRACT: Methane is an important greenhouse gas and tropospheric ozone precursor. Simultaneous observation of ethane with methane can help identify specific methane source types. Aerodyne Ethane-Mini spectrometers, employing recently available mid-infrared distributed feedback tunable diode lasers (DFB-TDL), provide 1 s ethane measurements with sub-ppb precision. In this work, an Ethane-Mini ...
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How big a problem are methane emissions and what can we do about it?
Methane emissions and their climate effects have been given an increasing amount of attention over the last few years from academia, industry and policy makers. The US Environmental Protection Agency (EPA) have lead the way in proposing new performance standards to reduce methane emissions from the natural gas industry by 40% by 2025 from 2005 levels. But how much of a climate problem really is ...
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Methane emission potential of open dumps in Chennai: a case study
Monitoring of atmospheric levels of methane and other Greenhouse Gases (GHGs) holds great promise for the mitigation of global warming resulting from increasing radioactive trapping by atmospheric gases. Since, the direct measurements of landfill methane emission found to be difficult, the methane emission potential of the open dumps in Chennai has been estimated using first–order decay models ...
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