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Miljönyttan med matavfallsåtervinning i Umeå tätort: en jämförande livscykelanalys av två system för matavfallshantering
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences.
2010 (Swedish)Independent thesis Advanced level (degree of Master (One Year)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

The environmental benefits from recycling of food waste in Umeå municipality A comparison of life cycle assessment of two systems for handling of food waste

This study investigates the environmental benefits from the recycling of food waste in Umeå municipality. An overall life cycle assessment (LCA) was performed where the old way of handling the food waste, combustion at Dåva heat and power cogeneration plant in Umeå, was evaluated and compared to the new system, anaerobic digestion at Svedjan’s biogas plant, Boden. The two systems were divided into four phases: handling of raw-material, production, end-use and handling of decay products. Both site-specific and overall data were used in the assessments. Anaerobic digestion generates a bigger negative environmental influence when it comes to the handling of raw-material, whereas the relationship is the opposite for the handling of decay products. The influence associated with the production and end-use phases is directly dependent on which product is of interest. If production of vehicle fuels, fertilizer or electricity is the priority, anaerobic digestion is preferable. If heat-production is considered most important, combustion is preferable. It is not possible to tell which system generates the lowest environmental influence without considering the functions created. Different kinds of environmental influence emerge in the handling of food waste, but fossil fuels and respiratory

Place, publisher, year, edition, pages
2010. , 81 p.
Keyword [sv]
food waste, combustion, anaerobic digestion, LCA.
National Category
Natural Sciences
URN: urn:nbn:se:umu:diva-34958OAI: diva2:327211
Available from: 2010-06-28 Created: 2010-06-28 Last updated: 2010-06-28Bibliographically approved

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