Overall collection costs per tonne were around 50 €/tonne
(45.8 €/tonne for the mixed waste of Scenario 1 and 56.1 €/tonne
for the residual waste of Scenario 2). The corresponding cost of
emptying one container (typically paid to the collection operator
by the municipality) was determined to around 3.70 €/time
(assuming seven households per container, 0.5 tonne/household/
year with a collection frequency of one time per week). This is similar
to the amount reported by Miljøministeriet (2013), where
emptying costs for a 660-l container were 3.10 €/time. The collection
cost per ton of organic waste was 96.3 €/tonne equivalent to
an emptying cost of 4.60 €/time (assuming 25 households per container,
0.5 tonne/household/year with a collection frequency of one
time per week). The collection of organic waste was more expensive
than collection of residual and mixed waste because costs
are inversely proportional to the amount of waste collected in each
collection point. Other options for collection could have been
assessed; however, the main purpose with the case study was to
show the applicability of the cost model, rather than provide an
exhaustive analysis.