57 uppsatser · sida 2 av 4
… is to collect the gas produced in landfills. The gas contains about 50 % of Methane which is a greenhouse gas 20 times worse than CO 2 and should therefore not be allowed to leak into the atmosphere. The Methane is in as large amount as possible used in different plants for …
… electrical energy and the possibilities to enrich, upgrade biogas. The use of methane rich gases like biogas and natural gas is today low in Sweden compared to major parts of the world. Natural gas is one of the most established energy sources in the world, it contributes to …
… bogs, or reed beds. There is very little information on wetland-grasses and methane production. Instead, a theory was evaluated regarding the possibility of transforming nutritional values for grass and sedges into biogas potentials. It was shown that this method does not …
a feasibility study
… pollution and healthproblems. India is one of the world’s largest emitter of methane gas from waste disposal.Since methane is a strong greenhouse gas, even small emissions have large impact on theclimate. Improper treatment of waste will also affect peoples? health, first of all …
… can be used to produce biogas. Upgrading biogas represents an increase in methane concentration from about 65 % to about 97 %. In addition, particles and contaminants must be sepa-rated from the upgraded biogas. There are various methods for upgrading and this report compares …
… used. Because of degradation by microorganisms, biogas with a high content of methane is formed during the digestion. To optimize the process different studies with co-digestion with sludge and other substrate have been made. It has been showed, in earlier research studies, that …
… stump harvesting on the emissions of three greenhouse gases, carbon dioxide, methane and nitrous oxide. The emissions were measured from the soil surface in a Norway spruce forest located in the southern part of Sweden. The study was conducted during May and June in 2008. The …
… on the landfill can, through decomposition, give rise to a large amount of methane gas, which is an energy rich gas that can be used for heat and electricity production. To receive a relatively large amount of gas, the decomposition requires a high moisture content in the waste …
… objective is to co-digest fodder beet and cow manure in order to find the best methane yielding mixture(s), and based on these results be able suggest whether fodder beets are a suitable substrate to use in a greater extent. This might prove to be one possible way in dealing …
… biogas production were compiled through aliterature review. In addition the methane potential from selected materials was determined bybatch experiments. Two full scale experiments were also studied to compare results from themodel with results from full scale biogas …
Bestämning av verkningsgrad
… convert bio-mass of a substrate to a raw gas containing about 65% of methane. Thegas cleaning is used to increase the methane content to about 97% so the gas can be used for motors invehicles. The biogas part of the Ekeby sewage plant in Eskilstuna is using multiple substrates …
Rötgaskammare för småskalig biogasproduktion
Biogas mainly consists of methane and carbon dioxide, where methane is theenergy-rich gas, and is naturally created when organic matter breaks down in absenceof oxygen, also known as anaerobic digestion. A biogas plant re-creates the anaerobicconditions inside a digester where …
En teknoekonomisk well-to-wheel analys av vätgas som fordonsbränsle
… for this analysis consists of two centralized methods of production, steam methane reforming (SMR), and alkaline water electrolysis. The distribution infrastructure consists of an extensive pipeline system along with truck transport of compressed hydrogen to filling …
… The aim of this study was to quantify the flux of carbon dioxide (CO2) and methane (CH4) in three boreal lakes, during this annual event. In order to do this, water samples were collected before and after ice-thaw, and the flux was estimated as the difference in mass of carbon …
… tests the composition of the ingoing biogas was 35 % carbon dioxide and 65 % methane. When the gas passes through the ash bed the carbon dioxide was fixed by the ash and that is the reason why the methane yields is about 95-100 % in the outgoing gas. Three different types of …
