While moving from left to right, it leaves a long trail of compacted waste behind.

Typically, in the working face, the compacted waste is covered with soil or alternative materials daily.

The space that is occupied daily by the compacted waste and the cover material is called a daily cell.

"We will have solid compacted waste in rooms that will not be full of liquid and brine slurry.

As rain falls on the compacted waste, it leaches out chemical and bacterial pollutants into the soil and underground water sources.

If not for this facility, an additional 14,000 tonnes of material (18 Olympic swimming pools of compacted waste) would be buried in the landfill each year.

"To locate the lost items, this decaying compacted waste would need to be systemically excavated and sorted mechanically by the contractor," a council spokesman said.

Alan Devenney was crushed to death under an 11-tonne industrial skip full of compacted waste at Loughanhill waste disposal depot.

The semi compacted waste continues in to a secondary compaction chamber where back pressure from a patented self adjusting nozzle adds further mechanical compaction.

The annual cost of running its waste transfer operation at Jenkins Lane in Barking is around £2.0million, whilst transporting compacted waste to landfill sites amounts to £3.1million.

In one dome they might heat with a wood-stove or a fireplacethey could not afford real wood, and so used compacted waste from various outside agricultural concernsand in the next dome over it was thought to be ethical to heat with methane gas.

Finally, the policies put in place are aimed not only at cleaning up the city, but also at devising an integrated waste system involving separate collection, a reduction in waste, the construction of modern facilities - not least to eliminate 'ecoballs', or huge mounds of compacted waste - and the redevelopment of old landfill sites.