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Showing result 1 - 5 of 8 essays matching the above criteria.

  1. 1. Thermal degradation of PFAS in solid matter

    University essay from KTH/Kemi

    Author : Tuqa Al-Badri; [2024]
    Keywords : PFAS; PFOS; PFOA; thermal degradation; sewage sludge; PFAS; PFOS; PFOA; termisk nedbrytning; avloppsslam;

    Abstract : Per- och Polyfluorerade alkylsubstanser (PFAS) är syntetiskt framställda organiska föreningar som har använts i stor utsträckning i konsument- och industriprodukter. PFAS-substanser besitter attraktiva egenskaper såsom resistans mot väta, fett, fläckar och är dessutom värmetåliga. READ MORE

  3. 2. Hydrogen-induced Fluidized Bed Reduction : Evaluation of the Effect of Pressure, Particle Size, Gas Mixture and Temperature on the Minimum Fluidization Velocity of Iron Ore Fines

    University essay from KTH/Materialvetenskap

    Author : Joakim Käck; Sebastian Uhlin; [2023]
    Keywords : ;

    Abstract : Steel is used worldwide and there are demands for an increase in current production. The problem emerges because steel and iron-making industries release vast amounts of CO2 and need to be more environmentally sustainable. READ MORE

  4. 3. Phasing out peat from a co-fired 50 MWth circulating fluidized bed boiler : A theoretical sulfation potential study

    University essay from Umeå universitet/Institutionen för tillämpad fysik och elektronik

    Author : Axel Bergstrand; [2022]
    Keywords : Peat; corrosion; fuel mixture; CFB; circulating fluidized bed; S; alkali chlorides; Sulfur; additives; combustion; fuel design; alkali related corrosion;

    Abstract : The chemical company Perstorp AB has a 50 MWth circulating fluidized bed to supply the production plant with process steam. The fuel mixture used shows a large variation with about 20 different fuel fractions that can be divided into the categories, residue wood chips, sludge, forest fuel, animal waste, industrial residues, and peat. READ MORE

  5. 4. Groundwater denitrification by fluidized bioelectrochemical systems

    University essay from KTH/Skolan för kemi, bioteknologi och hälsa (CBH)

    Author : Lena Bonin; [2020]
    Keywords : Bioelectrochemistry; fluidized bed reactor; bioremediation; denitrification; groundwater; reduced graphene oxide;

    Abstract : Groundwater (GW) accounting for most of the freshwater available around the World, finding sustainable techniques to depollute it is of crucial importance for safe drinking water supply. The extensive use of fertilizers in the agriculture, as well as other anthropogenic activities, are contributing to the excessive nitrate levels in some aquifers. READ MORE

  6. 5. Recovery of Phosphorus from Incineration of Sewage Sludge

    University essay from KTH/Skolan för kemivetenskap (CHE)

    Author : Aditi Bhasin; [2017]
    Keywords : ;

    Abstract : The primary source of phosphorus, phosphate rock, is a non-renewable resource which is expected to get exhausted in the next 50 – 100 years. Sewage sludge in Sweden constitutes 25% of the annual phosphorus in the country, making it a potentially significant source for phosphorus recovery. READ MORE