Sökning: "oil consumption"

Visar resultat 26 - 30 av 107 avhandlingar innehållade orden oil consumption.

  1. 26. Effects of replacing fish oil with vegetable oils in feed for rainbow trout (Oncorhynchus mykiss) and Arctic charr (Salvelinus alpinus)

    Författare :Andreas Pettersson; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Sammanfattning : As global capture of fish has stagnated and fish consumption is increasing due to a growing human population, the demand can only be met by increased aquaculture production. Fish oil (FO), derived exclusively from wild pelagic fish, has traditionally been used as the primary lipid source in fish feeds. LÄS MER

  3. 27. Comparative study of residue pellets from cane sugar and palm-oil industries with commercial wood pellets, applied in downdraft gasification

    Författare :Catharina Erlich; Torsten Fransson; Björn Zethraeus; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; energy engineering; Mechanical and thermal engineering; Mekanisk och termisk energiteknik;

    Sammanfattning : While biomass utilization for energy conversion in the industrialized nations is being largely developed, highly efficient and environmentally friendly, many tropical countries still use biomass at low efficiencies and high emission levels. The main reasons for these gaps are both political and technological: the energy markets are different, the Gross National Product (GDP) differs widely, and the feedstock differs in form and conversion behaviour. LÄS MER

  4. 28. Environmental taxation - Empirical and Theoretical Applications

    Författare :Åsa Löfgren; Göteborgs universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Oil; Decomposition; Gasoline; Policy instruments; Causality; Political economy; Optimal taxation; Habit formation; Environment; Intertemporal choice;

    Sammanfattning : This thesis consists of five self-contained articles, and hence each paper can be read independently. Still, all five papers have one important feature in common: environmental taxation. LÄS MER

  5. 29. Valorisation of fish waste biomass through recovery of nutritional lipids and biogas

    Författare :Betty Mbatia; Bioteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; by-products; value addition; EPA; DHA; PUFA; biogas;

    Sammanfattning : Commercial fish catch in Eastern Africa is dominated by Nile Perch. Of the fish that is processed for human consumption, 30-40% is wasted. Currently, these wastes are not fully utilized; they are sold off at low price, converted to low valued products or left to decompose leading to environmental pollution and wastage of bioresource. LÄS MER

  7. 30. Towards functional characterisation for cylinder liner surfaces

    Författare :Cecilia Anderberg; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : The demands on decreased environmental impact from vehicles force the automotive industry to develop engines with reduced engine oil and fuel consumption. Frictional losses in the piston ring cylinder liner system accounts for approximately 20 % of the total frictional losses within an engine. LÄS MER