Waste is collected from residents in collection trucks once a week or once every two weeks. Collection trucks call on Vestforbrænding where they tip the waste into a bunker measuring around 100 by 20 meters (10 meters deep).

On average the trucks deliver 1.500 to 1.600 tonnes of waste every single day, most Monday-Friday and less in the weekends.

The waste bunker is serviced by three automatic crane grabs each holding up to around 5 tonnes of waste in one grab load. The cranes move the waste to mix it and make sure that there is constantly sufficient space in the bunker for collection trucks to tip their waste.

In one side of the waste bunker a large waste hopper for each furnace is located. The cranes make sure that the waste hoppers are constantly filled with waste. In the bottom of the waste hopper a device pushes waste continuously from the hopper into the furnace. 

Waste is fed onto grates where it ignites. Air is added below the grates ensuring optimum conditions for incineration. The furnace regulates waste and air volumes automatically according to oxygen content, temperature, waste flow, air flow, and energy generated.

When the waste has passed through the furnace it is completely burned out and is called bottom ash. Bottom ash makes up around 17 % of waste input measured in weight. The volume is only around 5 % of the original amount of waste. In 2008 the 563.000 tones of waste resulted in just below 100.000 tonnes of bottom ash.

Bottom ash is reprocessed by a contractor ensuring that 95 % of ash volumes are recycled. It is used as a filler material in major construction works such as motor ways, roads, and bridges.