Ziel
The recovery of Construction and Demolition Waste (C&DW) is a pressing need in Europe to reduce landfill and aggregate extraction costs whilst providing resalable commodities in the form of top soils, metals and aggregates. Secondary processing with washing equipment can triple the value, quality and potential uses of the recovered materials. However, the existing washing techniques are largely adapted from aggregate extraction methodologies and have significant limitations:. A typical system rated at 100 tonnes processing capacity per hour will use in excess of 75,000 to 1,000,000 litres of water to achieve products compliant with recycling standards. These systems tend to be centralised within a waste collection community of only 30 kilometre radius. The complex consistency of the feed stream (relative to aggregate extraction sites) results in a high carryover of floating contaminants in the recovered phases (esp. wood and plastics).
The addition of flocking agents to chemically reduce turbidity results in a clay fraction that can only be put to landfill and contaminates the water with chemical residuesThis project proposes to develop a mobile washing system of 15,000 litre capacity with the following novel features: A novel hydro-vortex separator for the removal of floating contaminants. Secondary washing of sand to remove any residual clay. Pre-treatment of the water with a electro-magnetic girdle. Water treatment using an optimised continuous discharge centrifuge. Secondary processing of 15% of the water through an innovative combined lamella / electrocoagulation chamber. Concentration of the sludge into cake by a hydraulic membrane filter pressing process thereby removing all requirements for coagulation chemicals and binders in the clay. The delivery of a flexible and integrated system capable of receiving and processing variable waste steams including soil extraction deposits, crushed building and roadway rubble...
Wissenschaftliches Gebiet
Aufforderung zur Vorschlagseinreichung
FP6-2003-SME-1
Andere Projekte für diesen Aufruf anzeigen
Finanzierungsplan
COOPERATIVE -Koordinator
DUNGANNON, NORTHERN IRELAND
Vereinigtes Königreich