Essays about: "ash leaching"

Showing result 1 - 5 of 16 essays containing the words ash leaching.

1. 1. Continuous leaching of phosphorus from sewage sludge ash

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

   Author : Sofie Göransson; [2022]
   Keywords : Ash leaching; Continuous stirred tank reactor; CSTR; Phosphorus recovery; Sewage sludge ash;

   Abstract : The global demand for food is increasing. Different nutrients are used to increase growth in agriculture and are thus essential for the world ́s food supply. An important and common nutrient is phosphorus. It can be mined, in the form of phosphate, from phosphate rock. READ MORE

3. 2. Trace element leaching from alum shale fines and red ash from Kvarntorp during a large column test

   University essay from Örebro universitet/Institutionen för naturvetenskap och teknik

   Author : Helena Rydfjord; [2022]
   Keywords : Alum shale; Leachate; Trace elements; Kvarntorp;

   Abstract : Fuel shortage during the Second World War led to oil production in Kvarntorp, Kumla during 1942-1966 by pyrolyzing alum shale rich in pyrite, FeS2, and organic material such as kerogen. This production has led to a lot of waste laying deposited out in the open after the mining closed and has had negative environmental impact in the form of ongoing weathering and leaching of acidic water and leaching of trace elements into its surroundings. READ MORE

4. 3. Scrubbing of sulfur dioxide from secondary process gases in a copper smelter

   University essay from KTH/Kemiteknik

   Author : Obiora Okolo; [2021]
   Keywords : sulfur dioxide; scrubbing; smelter; process industry; flue gas desulfurization; svaveldioxid; skrubbning; smältverk; processindustri; rökgasavsvavling;

   Abstract : Processindustrin är den största källan för utsläpp av svaveldioxid (SO2) i Sverige, vilket även inkluderar icke­järnmetallindustrin. Kopparsmältverket Boliden Rönnskär har ett miljötillstånd som tillåter SO2­-utsläpp på maximalt 3500 ton/år, en gräns som Rönnskär har legat nära under de senaste åren. READ MORE

5. 4. An investigation of some properties of Shredder Fines and an element analysis of its ash to find new ways of dealing with this waste

   University essay from Högskolan i Borås/Akademin för textil, teknik och ekonomi

   Author : Adeel Naidoo; [2020]
   Keywords : Shredder fines; Bottom ash; Ash analysis; Combustion; Chemical fractionation; Elemental analysis; Cement industry; Metal recovery;

   Abstract : Shredder fines are the materials with a particle size of less than 10 mm resulting from the shredding of vehicles and complex metal scrap from industries and municipalities. This waste is currently used as landfill construction material, but Stena Recycling wanted to know whether the bottom ash from the combustion of this waste could be useful to the cement industry, and whether it would be feasible to extract Cu and Zn from this ash. READ MORE

6. 5. Influence of bio-coal ash respectively coal structure on coke production and coke quality

   University essay from Luleå tekniska universitet/Industriell miljö- och processteknik

   Author : Frida Bäck; [2019]
   Keywords : Bio-coke; bio-coal; leaching; coke quality; carbon structures; torrefied sawdust;

   Abstract : In recent years, the consequences of global warming have increased the discussion about the climate impact caused by humans and the fossil emissions. Sweden has decided to reduce the negative climate impact with a zero vision for the fossil carbon dioxide emissions in year 2045. READ MORE