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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Glasmjöl 780°C : Ett utforskande av en restprodukt från glasindustrin.

Söderlind, Elin January 2018 (has links)
SAMMANFATTNING I detta projekt har jag undersökt restprodukten glasmjöl för att ta fram nya potentiella material för designområdet. Jag har arbetat nyfiket och experimentellt för att behålla fokus och intresset vid liv, samt för att fortsätta vara kreativ trots exempelvis stress eller press. Glasmjölet har under projektet processats på olika sätt och blivit ett flertal material med olika egenskaper. Framförallt har jag valt att fokusera på en av processerna vilket var att smälta glasmjölet i 780°C. Detta material blir bland annat poröst, starkt och dekorativt samt skulle med fördel kunna gjutas i en serieproduktion, om det finns gott om restprodukten glasmjöl. Detta återkommer jag till mer under diskussionen.  Under projektet har jag inspirerats friskt av konstverk, design, starka karaktärer och uttrycket ”less is more”, där jag ställer mig kritisk till uttrycket. Två viktiga referenser för mitt arbete har varit Iris Apfel och skulpturen ”Kyssen” av Auguste Rodin som mitt designförslag är mycket inspirerat av. Skulpturen i designförslaget kommenterar uttrycken ”ornament and crime” och ”less is more” där jag istället vill att min skulptur gärna uttrycker ”more is more” där funktionen fokuserar på det dekorativa och skulpturala. Mina slutförslag är tänkta att tänja på gränser och inspirera, samt väcka intresse i syfte att intressenter kan arbeta vidare i materialet för att på sikt ta tillvara på detta avfall som resurs och därmed bidra till en mer hållbar glasindustri, samt möjligtvis även gynna glasindustrin i Sverige. Slutförslagen är också menade att utmana normer kring både estetik och tankesätt som gärna också får väcka ett intresse i sig. För att utforska mitt ämne har jag hållit en workshop, intervjuat ett flertal personer inom design, återvinning och glas. Jag har arbetat på ett intuitivt, strategiskt och konstnärligt sätt. Under projektet var det viktigt för mig att inte begränsas av min kunskap som glasblåsare utan utforska glasmjölet så öppet som möjligt. Jag har använt ohämmade och okomplicerade metoder i den experimentiella fasen som har väckt min nyfikenhet och kreativitet. Därtill har jag tagit strategiska beslut i slutfasen av projektet, för att kunna använda mig av den rika informationen jag har arbetat fram, och sedan göra genomtänkta, relevanta val. För mig har beslutet, att använda intuitionen, rättfärdigat ett sätt att tänka som fungerar bra för mig eftersom det gjorde processen lustfylld, höll mig nyfiken samt möjliggjorde ett snabbare arbetstempo. Det har fått mig att hålla intresset vid liv samt undvika stress i samband med arbetet som skulle kunna göra processen stum. Jag har genom detta förhållningssätt valt att ha alla delar av mitt liv i fokus.
2

Miljöoptimera avfallsindustrin i Sverige : - återvinn restprodukten gips

Quintana, Angelica, Yngstrand, Sofia January 2011 (has links)
One of the most common ways to produce heat and electricity in Europe today is by the incineration of waste or combustion of coal. These materials can be very sulfurous and during combustion sulfur dioxide is produced. This is an environmental and health related toxic substance which is why power plants have strict regulations on removing it from the flue gas. Sulfur dioxide is removed from the flue gas by adding a limestone reagent. The sulfur dioxide reacts with the limestone and the synthetic product obtained is “Flue Gas Desulfurization gypsum”. This byproduct, from combustion, provides an environmentally friendly solution when used in building material such as plasterboards. The FGD gypsum that is being used in different types of building materials does not derive from waste incinerated power plants. We have more than 30 of these in Sweden and some of them get FGD gypsum as a byproduct. The purpose of this thesis was to find out whether a particular waste incineration plant in Sweden can reuse their gypsum waste instead of disposing it at landfill.
3

Potential application areas for Fresenius Kabi's bonus products

Karlsson, Jenny, Brink, Matilda, Annala, Elina January 2019 (has links)
The main purpose of the project was to investigate existing markets within the food- and cosmetic industry in order to determine a strategy for market entrance with the bonus product of Fresenius Kabi. The original bonus product, P080, is a rest product from the process where phospholipids are extracted from egg yolk powder. P80 is a refine version of the P080 where egg yolk oil has been extracted, hence the protein content in P80 is higher. The extracted egg yolk oil is the final portion of the bonus product. Thereby, the original bonus product can be divided into two refined fractions. This project investigates the potential for each of these three substances to be a part of a fictive product.  By scanning the global protein market as well as the egg yolk protein and egg oil market, seven potential product segments were discovered. These segments were further evaluated in order to bring out specific products that were potential candidates as products based on the bonus product.  The analysis resulted in two fictive products based on P080; high value nutrition bars and snacks for seniors, one based on P80; protein powder, and one based on egg yolk oil; dietary supplement. All presented in three business cases.
4

Framställning av dränerande bärlager från bergtäkt

Abu Sulaiman, Iyad, Ibrahim, Miran January 2023 (has links)
Bearing layers are used in road and building constructions as underlying soil layers to provide stability and support to the top layer that takes up the load. A normal bearing layer contains different amounts of materials such as stone, gravel, and filler. That mixture of materials contains a large amount of filler to give the product tightness and stability. Draining bearing layers usually contain less filler than ordinary bearing layers, because their purpose is to improve the drainage properties and reduce the risk of damage due to water collection.This thesis work took place at NCC's quarries in Sälgsjö and Hammarby. At NCC's rock quarry, there already is a standard bearing layer with a grain size of 0/32 and a filler content of approximately 4–5%. In this degree project, a production process has been created to obtain a drain bearing layer where the filler content is reduced to approximately 2–3%. The requirement for a draining carrier layer is 2–3% filler content and this requirement has been followed in this production process. The draining bearing layer has been produced based on a standard product with the same grain size.There are practical limitations in how the operations work and what capabilities are required. Moisture in the material has also been a limitation. In this project, work is done with freshly crushed material, which has a relatively low moisture content (1–2%). A vibration-free screen like the function of the harp has been designed and built. Then the standard product was run through the harp at different gradients and the new product was analyzed in the lab to see what filler content was achieved. A simulation test was performed using a FEM design program called Digiroad at Chalmers University of Technology in Gothenburg.The results demonstrate that the utilization of the developed models of harp screens reduces the proportion of filler in the material. Additionally, the conducted harp screen analyses confirm that the designed harp screens are effective in transforming a standard bearing layer into a draining bearing layer, which helps to prevent water accumulation under roads or buildings and thus reduces the risk of damage and problems. The efficient production process for producing draining bearing layers can be of great importance to ensure a sustainable and safe infrastructure.

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