Collection costs increased by 43% in total due to the separate
collection of organic waste, and organic collection incurred higher
costs per tonne than residual and mixed waste. This was caused by
the fact that the number of collection points (households) required
to fill a waste truck is inversely proportional to the amount of
waste per collection point at a given time. This significantly
affected the capital costs of trucks and labour costs because both
costs were dependent on the tonnes of waste collected.