Beddington Dano, Composting Facility, Croydon
The purpose of this contract was to ensure that all waste arriving at site is treated in some way prior to going to landfill, to reduce volume.
Viridor currently had an existing skip yard, which received all skip waste and separated out green waste, metals and rubble. The rubble is used to form site roads and the metal is sold as scrap.
The new facility now receives and treats all waste coming into the tip from non-skip waste.
Waste is brought to site and tipped onto the floor of the Dano Building. The waste is loaded into a 30m3 hopper, which pushes the material onto a series of conveyors leading to a Dano Drum. The waste is pushed into the drum by the internal tangs and ribs whilst water is added at 1 litre/second. At the exit point of the drum the material is dropped onto a rotating screen and sieved into various categories.
The material passing the 45mm screen is deemed as being compostable and is moved by dump truck to stage one reinforced concrete tunnels where the material is heated by means of blower pipes built into the floor supplied by fans mounted on the roof.
The material stays in these tunnels for one week, being constantly monitored by means of roof probes. After the first week it is moved to the second stage reinforced concrete tunnel to be turned and treated in a similar fashion. On completion the materials, which are vastly reduced in volume, are taken to landfill.
Other Dean & Dyball works included:
- Construction of concrete wheel wash
- Pumping station
- Process drainage
- Construction of external slab
- Odour control units
- New transformers