57 uppsatser · sida 1 av 4
relations between enteric production and production from faeces and urine
Methane (CH4) is a greenhouse gas (GHG) that contributes to the global warming. One of the largest sources of methane is livestock, preferably ruminants which alone counted for 30% of the total agricultural anthropogenic methane emissions in the year of 2000. The reason to why …
… waste material degrades within a short period in anaerobic environments. The methane gas that is formed provides a harmful contribute to the greenhouse effect, 23 times larger impact than carbon dioxide. It is therefore desirable to minimize the emissions of methane gas from …
… carbon dioxide is separated and the Swedish Standard Type A requires the methane content to be 97 % for vehicle gas. In the gas treatment process from biogas to vehicle gas, the upgrading step when carbon diox-ide is separated represents the highest cost since conventional …
… which requires greater livestock production. Ruminants contributes to more methane emission which creates a dilemma between food production and its environmental impact. By feeding ruminants with nutritive crops which humans can not assimilate the animal performance will …
… som förväntad och överrensstämde även med resultat från andra studier. AbstractMethane emission is a factor to consider in climate change. Peatlands are a source of methane, and the plant community composition of the peatlands has been understood to have great importance for the …
… Through anaerobic digestion, waste can be utilized to produce energy-rich methane gas. In this way, waste can be a resource instead of a burden on society. The purpose of this project is to investigate the methane yield of source-sorted organic fraction of municipal solid waste …
… where raising cattle is questioned due to their high production of enteric methane. To be able to raise animals in a more environmental friendly way and at the same time improve productivity in a developing country such as Vietnam would be favorable. The use of feed additives …
en studie i labskala
… restaurant waste and waste from water works. To decide the potential of both methane and biogas production from different substrates batch laboratory tests were carried out. To imitate the anaerobic digestion process at Käppala continuous tests with small scale reactors were …
In this thesis the methane gas potential of three different substrates, two algaes Saccharina latissima and Laminaria digitata and biosludge mixed with paper fiber was studied. This was done by batch experiments in a laboratory environment to examine the gas production and …
Substratkartläggning och rötningsförsök i laboratorieskala
… down organic substances while producing carbon dioxide and the energy-rich gas methane. This master’s thesis has focused on development of the mixture of different organic substances that is treated at a specific plant, namely Mosserud biogas plant. Located a couple of …
The aim of the study was to investigate if methane emission in a constructed wetland changed in a diurnal pattern correlating to temperature, humidity or light conditions. The gas measurements were carried out with a static chamber technique. The wetland (in Nykvarn outside of …
The quantity of methane emissions from sheep depend on several factors, for example, the composition of the diet, feed quality, the age of the animals, time of the day and maybe also breed and sex. A comprising literature review was made about which factors that affect the size …
effekt på mjölkavkastning och betesbeteende hos mjölkkor
… time cows spent grazing and ruminating. Since ruminating animals give rise to methane emissions, methane emissions from the different feed ratios were estimated using equations obtained from the literature. In the trial 27 lactating dairy cows (Swedish Red Breed) were blocked by …
En litteraturstudie och rötning i labbskala
… performed.The results from lab scale digestion show that the pea residue has a methane potential of 300-400 liters of methane per kg VS during 25 days of anaerobic mesophilic digestion. Chopped pea residue had a slightly higher methane production than untreated pea residue.. The …
Med hänsyn till elprisets variationer
… the profitability.The techniques examined are fuel dryer, pellet production, methane production, combined methane- and pellet production, seasonal heating storages in caverns and pit heat storages and condensing tail. Using Excel and Matlab, the prerequisites for investment …
