FEASIBILITY STUDY OFSTAND-ALONE SMALL-SCALE DIGESTION SYSTEMSTO PRODUCE BIOGAS FOR LOCAL USE
Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
The purpose of this project was to carry out a feasibility study of implementing a small-scale biogas plant on KTH campus using food wastes from the neighbouring restaurants and KTH kitchens as input substrate, where the biogas produced could be used in the Energy laboratory, to run the micro turbine, as an example. Considering that KTH has 10 departments and that each department has its own kitchen, the amount of food wastes that can be recuperated for input to the plant is around 225 kg per day for a normal working week, requiring a 10m3 biogas plant.
This report also relates to the potential implementation of small-scale biogas plants on farms in Mauritius using manure and crop endings as input substrate as a solution to the waste management problems the farmers are currently facing as well as using the biogas to provide energy for cooking and heating.
Based on the quantity of food wastes available from the neighbouring restaurants, the sizing of the proposed biogas plant was calculated and the best technical and commercial options were considered.
An experimental biogas plant was setup on the campus and the planning and logistics involved were studied as well as the potential quantity and quality of gas produced from food wastes. The optimal biogas production for a 5 m3 capacity biogas plant and processing food wastes is 6 to 10 m3 of biogas per day composed of about 68-72% methane. But, since the experiment was run for only a two-week period, the optimum biogas production could not be reached. Several operational and biological problems were encountered during the operation of the plant. However, the output of the experiment is positive as the logistics required for the setting up and running of a biogas plant on campus or elsewhere including the technicality of such a plant and the human resources requirements have been deduced from the lessons learned.
Place, publisher, year, edition, pages
2012. , 59 p.
Engineering and Technology
IdentifiersURN: urn:nbn:se:kth:diva-137368OAI: oai:DiVA.org:kth-137368DiVA: diva2:678792
Subject / course
Master of Science - Sustainable Energy Engineering
Malmquist, Anders, Doctor