Sökning: "methane yield"

Visar resultat 11 - 15 av 56 avhandlingar innehållade orden methane yield.

  1. 11. Methane production in dairy cows : individual cow variability in methane production

    Författare :Edward Hernando Cabezas Garcia; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Sammanfattning : Enteric methane (CH4) emissions vary between individual cows, and this variation is attributed to both animal and dietary factors. In addition, measurement technique of in vivo CH4 emissions from individual animals still represents a major challenge for successful emissions mitigation strategies. LÄS MER

  3. 12. Factors that Influence the Biochemical Methane Potential (BMP) Test : Steps towards the Standardisation of BMP Test

    Författare :Bing Wang; Bioteknik; []
    Nyckelord :Anaerobic Digestion; Biochemical Methane Potential; Degradation Kinetics; Lignocellulosic Biomass; Mixing; Pre-treatment; Standardisation;

    Sammanfattning : Anaerobic digestion (AD) has gained increasing attention nowadays as an approach for both waste treatment and renewable energy generation. Currently, many different types of materials can be used as feedstock for biogas production via AD process, but their biodegradability (based on methane yield, BDCH4) and potential to produce biogas might vary significantly, and these properties are key parameters that should be taken into consideration for economy, design and operation of a full-scale biogas plant during the selection of potential feedstock. LÄS MER

  4. 13. Anaerobic digestion of horse manure : renewable energy and plant nutrients in a systems perspective

    Författare :Åsa Hadin; Ola Eriksson; Karl Hillman; Nils Ryrholm; Högskolan i Gävle; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Horse manure; horse keeping; anaerobic digestion; nutrient recycling; systems perspective; bedding; methane potential; feedstock; biogas; biofertilizer; Hästgödsel; hästhållning; rötning; näringsåterföring; systemperspektiv; strömaterial; metanpotential; biogassubstrat; biogas; biogödsel;

    Sammanfattning : In horse keeping horse manure is produced, which can be utilized as a fertilizer or considered a waste. Horse manure constitutes a resource in terms of both plant nutrients and energy. In addition energy policies and objectives aim at replacing fossil fuels with renewable energy sources. LÄS MER

  5. 14. Development of PET radioligands synthesized from in-target produced [11C]methane

    Författare :Jan Andersson; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : The aim of this thesis was two-fold. The first aim was to compare the specific radioactivity (SA) of positron emission tomography (PET) radioligands synthesized from in-target produced [11C]methane ([11C]CH4) and [11C]carbon dioxide ([11C]CO2). LÄS MER

  7. 15. Oats in the diet of dairy cows : milk production and enteric methane emissions

    Författare :Petra Fant; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Sammanfattning : The overall aim of this thesis was to investigate whether replacing barley with oats as a grain supplement for dairy cows could reduce enteric methane (CH4) emissions without compromising milk production. Barley is a more common grain supplement in Sweden, mainly due to higher tabulated feeding values suggesting higher milk production with barley than with oats. LÄS MER