Miljösystemanalys av torkat matavfall för biogasproduktion
(2024) FMIM01 20232Environmental and Energy Systems Studies
- Abstract
- The food waste created in Swedish commercial kitchens presents a difficult logistical and environmental problem for local governments. Today all the food waste is collected separately and recycled organically to create biogas, an energy-rich fuel that can be used for both industrial and domestic applications. To mitigate the logistical and sanitary issues associated with large amounts of organic waste, some commercial kitchens have installed food waste dryers that significantly reduce the amount of waste that the staff has to handle. The purpose of this thesis was to examine the environmental implications and consequences that arise when food waste drying is introduced in the recycling system of food waste. A life cycle analysis was... (More)
- The food waste created in Swedish commercial kitchens presents a difficult logistical and environmental problem for local governments. Today all the food waste is collected separately and recycled organically to create biogas, an energy-rich fuel that can be used for both industrial and domestic applications. To mitigate the logistical and sanitary issues associated with large amounts of organic waste, some commercial kitchens have installed food waste dryers that significantly reduce the amount of waste that the staff has to handle. The purpose of this thesis was to examine the environmental implications and consequences that arise when food waste drying is introduced in the recycling system of food waste. A life cycle analysis was carried out where energy consumption and greenhouse gas emissions were calculated for the entire recycling process, from waste to biogas, of a day's worth of food waste from three different kitchens. The recycling process was constructed in different ways to compare a system with and without food waste drying. The results showed that the energy consumption from the drying process was almost as large as the energy that gets recycled from the biogas. The emissions were increased by ca. 20 % when food waste drying was introduced into the system using Swedish electricity mix. If EU electricity mix was used, which contains a higher degree of fossil precursors, almost all of the environmental benefits associated with recycling food waste to biogas disappear in the system. The food drying process did not cause a significant reduction in the biomethane potential of the food waste. This points toward the conclusion that food waste drying results in a bad energy balance for the system and that it leads to an increase in emissions, that is heavily reliant on the type of electricity used in the process. (Less)
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/student-papers/record/9154671
- author
- Woin, Alexander LU
- supervisor
- organization
- alternative title
- Environmental systems analysis of dried food waste for biogas production
- course
- FMIM01 20232
- year
- 2024
- type
- H3 - Professional qualifications (4 Years - )
- subject
- keywords
- Food waste drying, Food waste recycling, Biogas, Life cycle analysis, Energy consumption, Greenhouse gas emissions, Biomethane potential.
- report number
- ISRN LUTFD2/TFEM—24/5209--SE + (1-62)
- ISSN
- 1102-3651
- language
- Swedish
- id
- 9154671
- date added to LUP
- 2024-05-28 11:20:56
- date last changed
- 2024-05-28 11:20:56
@misc{9154671,
abstract = {{The food waste created in Swedish commercial kitchens presents a difficult logistical and environmental problem for local governments. Today all the food waste is collected separately and recycled organically to create biogas, an energy-rich fuel that can be used for both industrial and domestic applications. To mitigate the logistical and sanitary issues associated with large amounts of organic waste, some commercial kitchens have installed food waste dryers that significantly reduce the amount of waste that the staff has to handle. The purpose of this thesis was to examine the environmental implications and consequences that arise when food waste drying is introduced in the recycling system of food waste. A life cycle analysis was carried out where energy consumption and greenhouse gas emissions were calculated for the entire recycling process, from waste to biogas, of a day's worth of food waste from three different kitchens. The recycling process was constructed in different ways to compare a system with and without food waste drying. The results showed that the energy consumption from the drying process was almost as large as the energy that gets recycled from the biogas. The emissions were increased by ca. 20 % when food waste drying was introduced into the system using Swedish electricity mix. If EU electricity mix was used, which contains a higher degree of fossil precursors, almost all of the environmental benefits associated with recycling food waste to biogas disappear in the system. The food drying process did not cause a significant reduction in the biomethane potential of the food waste. This points toward the conclusion that food waste drying results in a bad energy balance for the system and that it leads to an increase in emissions, that is heavily reliant on the type of electricity used in the process.}},
author = {{Woin, Alexander}},
issn = {{1102-3651}},
language = {{swe}},
note = {{Student Paper}},
title = {{Miljösystemanalys av torkat matavfall för biogasproduktion}},
year = {{2024}},
}