Examensarbeten för masterexamen // Master Theses
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Browsar Examensarbeten för masterexamen // Master Theses efter Program "Industrial ecology (MPTSE), MSc"
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- PostEnergy consumptions and CO2 emissions resulting from different handling strategies of glass from end-of-life vehicles(2008) Lassesson, Henric; Chalmers tekniska högskola / Institutionen för kemi- och bioteknik; Chalmers University of Technology / Department of Chemical and Biological EngineeringEvery year a large number of vehicles become useless. They become end-of-life vehicles (ELV) and need to be scrapped. The materials from a vehicle will be taken care of for reuse, recycling, recovery or disposal. For the glass, there are at least three scenarios, with different handling techniques: 1. dismantling of the glass from the ELV before the ELV is shredded 2. separation of the glass, from the shredder waste, to be used for new glass products, or 3. separation of the glass along with some other inorganic fractions, from the shredder waste, to be used for filling material. The purpose of this study is to investigate and compare the environmental impacts from these three scenarios. The investigation is from a life-cycle perspective, beginning when the ELV arrives at the vehicle dismantler and ending when the glass has become a new product. The glass is not a hazardous material and all emissions to the environment are directly linked to the use of energy, with one exception. When new glass products are produced from virgin materials, some chemically bound carbon is released as CO2, which will be prevented if recycled glass is used instead. All results are therefore presented as energy consumptions and CO2 emissions. The recycling of glass results in small reductions in energy consumptions and CO2 emissions, compared with recycling of other materials. In this study, scenario 1 presents itself with a higher possible recycling rate and also the highest savings of energy and CO2. Scenario 2 has the second highest savings and a brighter future in technical development within the recycling business. The simplest option presented in this study is scenario 3, with savings close to zero.
- PostLCA of producing dissolving pulp from agricultural residue(2023) Parayil, Manuel Mammen; Chalmers tekniska högskola / Institutionen för kemi och kemiteknik; Chalmers University of Technology / Department of Chemistry and Chemical Engineering; Bernin, Diana; Rydberg, Tomas
- PostLife cycle assessment of the use of marine biocides in antifouling paint(2014) Usino, David; Chalmers tekniska högskola / Institutionen för kemi- och bioteknik; Chalmers University of Technology / Department of Chemical and Biological Engineering
- PostLife cycle assessment of the use of marine biocides in antifouling paint(2014) Lin, Shaojie; Chalmers tekniska högskola / Institutionen för kemi- och bioteknik; Chalmers University of Technology / Department of Chemical and Biological Engineering
- PostLife cycle energy assessment of wood-based Nano Fibrillated Cellulose(2014) Nguyen, Thuy Duong; Chalmers tekniska högskola / Institutionen för kemi- och bioteknik; Chalmers University of Technology / Department of Chemical and Biological Engineering
- PostOvercoming limitations in life cycle assessment of bio-based products(2016) Isaksson, Charlotte; Gustavsson, Jesper; Chalmers tekniska högskola / Institutionen för kemi och kemiteknik; Chalmers University of Technology / Department of Chemistry and Chemical Engineering
- PostPhosphorous recovery from iron (III) phosphate sludge(2011) Bergquist, Camilla; Chalmers tekniska högskola / Institutionen för kemi- och bioteknik; Chalmers University of Technology / Department of Chemical and Biological EngineeringPhosphorous is an essential element for all living beings with no possible substitute. Phosphorous is a chemical element and is therefore not finite, however the workable findings of phosphorous minerals are. Due to the rapid population growth and depleting phosphorous reserves, there is both an environmental as well as an economical reason to recover phosphorous. As a step towards sustainability and a lower environmental impact, Eka Chemicals wishes to recover phosphorous from the iron (III) phosphate sludge. The aim of this master thesis is to investigate how a waste stream, rich on iron (III) phosphate, can be utilized and how phosphates can be separated and recycled, at Eka Chemical´s plant in Trollhättan. From this master thesis it can be concluded that removing unwanted substances from the sludge is the only short-term method which has shown enough satisfying recovering results to be a potential method to be implemented on site. However a suitable user has to be found in order for the approach to be successful. Using the sludge as raw material for the manufacturing of snail pesticide is one alternative and using it as fertilizer is another. Both the extraction as well as the method of changing the precipitation is possible alternatives for long-term approaches in order to reach the goal of waste prevention rather than waste treatment. However other factors such as economy also have to be taken into account when choosing the best alternative
- PostThe environmental performance of high value recycling for the fashion industry(2017) Spathas, Theodoros; Chalmers tekniska högskola / Institutionen för kemi och kemiteknik; Chalmers University of Technology / Department of Chemistry and Chemical Engineering