Sökning: "calcium phosphates"

Visar resultat 16 - 20 av 23 avhandlingar innehållade orden calcium phosphates.

1. 16. Ash transformation in thermochemical conversion of different biomass resources with special focus on phosphorus

   Författare :Ali Hedayati; Marcus Öhman; Christoffer Boman; Kentaro Umeki; Anita Pettersson; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; agricultural biomass; forest residues; sewage sludge; ash transformation; release; potassium; phosphorus; combustion; gasification; bio charcoal; phosphorus recovery; Energy Engineering; Energiteknik;

   Sammanfattning : A great potential exists for increasing the use of bioenergy in thermochemical processes by utilizing agricultural biomass, forest residues, and sewage sludge that have high availability. Many of these biomass assortments have high ash contents with relatively high concentrations of ash-forming elements such as potassium (K), calcium (Ca), silicon (Si), and phosphorus (P). LÄS MER

3. 17. Filter beds for on-site wastewater treatment : Towards more reliable estimations of phosphorus retention

   Författare :Inga Herrmann; Petter Jenssen; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; VA-teknik; Urban Water Engineering;

   Sammanfattning : Phosphorus (P) is an important plant nutrient and essential for life. However, thephosphate rock used for fertilizer production is a non-renewable resource and itsproduction is expected to peak. At the same time, the discharge of P into naturalwaters is causing eutrophication, a severe problem in areas such as the Baltic Sea. LÄS MER

4. 18. Sustainable phosphorus removal in onsite wastewater treatment

   Författare :David Eveborn; Jon Petter Gustafsson; Gunno Renman; Erik Kärrman; Paul Withers; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Onsite wastewater treatment; Soil treatment system; Phosphorus; Removal mechanisms; Environmental impacts; Life cycle assessment;

   Sammanfattning : Aquatic eutrophication is a serious environmental problem that occurs all over the world. To protect surface waters (in particular the Baltic Sea), the regulatory pressure on onsite wastewater treatment (OWT) systems have increased in Sweden. LÄS MER

5. 19. Co-combustion of Biomass and Waste Fuels in a Fluidised Bed Boiler - Fuel Synergism

   Författare :Anna-Lena Elled; Högskolan i Borås; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; co-combustion; fluidised bed combustion; straw; municipal sewage sludge; deposit formation; ash composition; biomass; wood;

   Sammanfattning : The objective of this work was to study co-combustion of biomass and waste fuels in a circulating fluidised bed boiler and to detect synergy effects with respect to flue gas composition and ash formation during boiler operation. It was also the aim to perform supplementary thermodynamic equilibrium calculations in order to support the experimental results. LÄS MER

7. 20. Leishmania donovani Lipophosphoglycan : Modulation of Macrophage and Dendritic Cell Function

   Författare :Katarina Tejle; Birgitta Rasmusson; Karl-Eric Magnusson; Olle Stendahl; Marita Troye-Blomberg; Linköpings universitet; []
   Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; Lipophosphoglycan; Leishmania donovani; macrophage; actin; phagocytosis; PKC alpha; dendritic cell; Microbiology and immunology; Mikrobiologi och immunologi;

   Sammanfattning : Leishmania donovani is a blood-borne tropicial parasite, which infects humans through bites by Phlebotomus sandflies. The parasite survives and multiplies inside macrophages in inner organs, and causes the deadly disease visceral leishmaniasis (Kala-Azar). LÄS MER