| dc.description.abstract | The current thesis suggests two main possible solutions to address issues in the precarious waste management system at Tukkutori Area, Helsinki, Finland.
The two solutions are the deployment of a Biodigester and a waste plastic-to-oil units to convert waste into biogas (plus fertilizer as a secondary by-product) and oil (mainly diesel), respectively.
In order to study the feasablity of these two solutions, waste disposal data was gathered from restaurants and other businesses at Tukkutori Area, from now on called the T Area. According to the quantity and type of biowaste and plastic waste, a fixed dome type biodigester of 50 m3 and the Blest NVG-200 pyrolysis unit were evaluated for each kind of waste, respectively.
The results of the evaluation showed that the biodigestor can convert the yearly 240 tonnes of biowaste into 297 MWh of electricity and 370 MWh of heat per year. Also, it can produce 209 tonnes of fertilizer, which is divided into 188 tonnes of liquid fertilizer and 21 tonnes of solid compost.
The Blest NVG-200 unit, in contrast, can convert the 120 kg/day of plastic into 120 litres of oil, including 72 liters of diesel that could be used to heat the biodigester to transport the fertilizer, for instance. | - |
