Sökning: "mechanical pre-treatment"

Visar resultat 11 - 15 av 16 uppsatser innehållade orden mechanical pre-treatment.

  1. 11. Evaluation of the suppressive effect of intermittent aeration on nitrite-oxidising bacteria in a mainstream nitritation-anammox process

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Luft-, vatten- och landskapslära

    Författare :Amanda Okhravi; [2015]
    Nyckelord :Activity tests; anammox; AOB; Manammox; nitritation; NOB; OUR.; Aktivitetstester; anammox; AOB; Manammox; nitritation; NOB; OUR.;

    Sammanfattning : An alternative to conventional removal of nitrogen through autotrophic nitrification and heterotrophic denitrification is autotrophic nitritation-anammox. The anammox bacteria oxidise ammonium directly to nitrogen gas with nitrite as an electron acceptor. LÄS MER

  3. 12. Application of enzymes for pre-treatment of wood chips for energy efficient thermomechanical pulping

    Master-uppsats, Institutionen för fysik, kemi och biologi; Tekniska högskolan

    Författare :Tomas Mårtensson; [2012]
    Nyckelord :Thermo mechanical pulping TMP ; Energy reduction; Enzyme; Pilot scale refining; Reducing sugar assay;

    Sammanfattning : Thermomechanical pulping (TMP) is a highly energy intensive process where most of the energy is used in therefining of chips to fibres. Various ways of reducing the energy consumption have earlier been studied, for examplechange of refiner pattern, addition of various chemicals, and also some biochemical implementation in the form of fungus and enzymes. LÄS MER

  4. 13. Pretreaments of Chinese Agricultural residues to increase biogas production

    Master-uppsats, Tema vatten i natur och samhälle; Filosofiska fakulteten

    Författare :Yu Wang; [2010]
    Nyckelord :Biogas product chinese agricultural residual; side product; pretreatment;

    Sammanfattning : Development of biological conversion of lignocellulosic biomass to biogas is one approach to utilize straw comprehensively. However, high lignin contents of lignocellulosic materials results in low degradation. LÄS MER

  5. 14. Anaerobic digestion of biological sludge from the pulp and paper industry

    Master-uppsats, Tema vatten i natur och samhälle

    Författare :Robin Karlsson; [2009]
    Nyckelord :Anaerobic digestion biogas biological sludge paper and pulp industry;

    Sammanfattning : The need for - and use of non-fossile fuels such as biogas have increased due to global warming, oil depletion and stricter environmental regulations. Organic wastes can be anaerobically digested in order to produce biogas, which can be utilized to generate heat or electricity. LÄS MER

  7. 15. Mechanical and chemical chip pre-treatment in mechanical pulp production

    Master-uppsats, Institutionen för fysik, kemi och biologi

    Författare :Malin Sjölin; [2008]
    Nyckelord :Mechanical pulping; TMP; CTMP; APMP; APTMP; alkaline-peroxide; electrical consumption; chip pre-treatment;

    Sammanfattning : The mechanical pulping industry has been developing throughout the years, due to competitive prices in the electricity market and good accessibility of wood. This has made it possible for such and “expensive” process to further develop. LÄS MER