treatment) and upgrading of output products (biogas as vehicle fuel
and pelletisation of digestion sludge for use as fuel or as fertiliser in
fields or forestry). The future district heating system comprises
waste CHP (Combined Heat and Power) and waste heat (excess
heat) as base load and bio-CHP, natural gas-CHP and heat pumps as
intermediate load while oil is peak-load. Thermal and biological
treatment ofwaste is included and several scenarios of futurewaste
management have been developed comprising a number of
parameters for the background system and different waste amount
growth rates.
The project has been carried out as a part of the project Thermal
and biological waste treatment in a systems perspective e WR21
[1]. The focus has been set to the waste and district heating system
in Gothenburg. The project has been running for 2.5 years with an
active group consisting of persons from Renova, Kretsloppskontoret,
Göteborg Energi, Gryaab and Profu. The work on development
of models and methods for handling strategic questions
within the field has gone back and forth within the group