The incoming trucks dump their load into the storage bunker. About 600 tonnes of waste are unloaded into here each day. In total, about 3,000 tonnes of waste can be stored in the bunker. Outside the enormous shed, almost none of this is visible. That is because the air extraction system keeps the shed in a state of underpressure at all times, and extracts all the unpleasant smells. That air is used as essential ?combustion air'. It is impossible to burn anything without oxygen.