Sökning: "Wheat straw"
Visar resultat 21 - 25 av 52 avhandlingar innehållade orden Wheat straw.
21. Studies of ash transformation processes in thermochemical co-conversion of phosphorus-rich manure and sludge with biomass residues
Sammanfattning : Efficient use of resources and sustainable recovery of various materials are important to minimize the anthropogenic impact on the climate and environment. One such resource is the phosphorus (P) present in manure and sewage sludge. LÄS MER
22. Extraction and Isolation of Hemicelluloses from Agricultural and Forestry Waste Streams
Sammanfattning : New methods and products must be developed to reduce our dependency on fossil fuels, to reduce global warming. In this work, methods of extracting and isolating hemi¬celluloses from agricultural and forestry waste streams have been studied. LÄS MER
23. Small-scale combustion of agricultural biomass fuels
Sammanfattning : The ambitious targets of the European Union in increasing the use of renewable energies to 20% of Europe’s energy needs, call for urgent changes, including in the biomass sector. The share of solid biomass for heating purposes could be further increased by replacing oil- and gas-fired furnaces with biomass boilers and by expanding the spectrum of biomass raw materials for small-scale combustion systems. LÄS MER
24. Pyrolysis of biomass. Rapid pyrolysis at high temperature. Slow pyrolysis for active carbon preparation
Sammanfattning : Pyrolysis of biomass consists of heating solid biomass inthe absence of air to produce solid, liquid and gaseous fuels.In the first part of this thesis rapid pyrolysis of wood(birch) and some agricultural residues (olive waste, sugarcanebagasse and wheat straw in untreated and in pelletized form) athigh temperature (800ºC1000ºC) is studied ina free fall reactor at pilot scale. LÄS MER
25. New potential in old varieties : Using landrace cereal to meet food production challenges
Sammanfattning : Landrace cereals – historical varieties characterised by high genetic diversity – have long been considered obsolete, and have almost completely been replaced by high yielding but high input-dependent cultivars. However, the need for increased multifunctional and low-input farming, and for finding varieties that can be robust to environmental stresses, has meant that these old varieties have been revalued. LÄS MER