SINGAPORE - M/s REMEX Mineralstoff GmbH (REMEX) has been awarded the tender to develop and operate a metal recovery facility to recover ferrous and non-ferrous metals from incineration bottom ash (IBA) generated by the incineration plants.
The National Environment Agency (NEA) said in a statement that the metal recovery facility is part of its long-term strategy to manage solid waste in Singapore and also part of the Government's plans to move towards a resource efficient society.
Currently, ferrous metals between 10mm to 300mm in size are being recovered from the IBA using magnetic separators at the incineration plants and the residual IBA is sent to the Semakau Landfill for final disposal. This conventional treatment system leaves the non-ferrous metals, such as aluminium and copper, and the remaining smaller pieces of ferrous metals that are still of economic value, intact in the residual ash.
As part of the effort to maximise resource recovery, ferrous metals larger than 4mm in size and non-ferrous metals larger than 2mm in size would be further extracted from the IBA using magnetic separators and eddy current separators, which are placed along the conveyors at the metal recovery facility. The resultant IBA could possibly be further treated to be used as materials for road construction and concrete applications.
"The setting up of REMEX's metal recovery facility is part of NEA's long-term plan to improve resource efficiency. NEA is currently studying possibilities for ash reuse, which will help resource-scarce Singapore to further increase resource recovery, as well as extend the lifespan of Semakau Landfill," said NEA Chief Executive Officer, Mr Ronnie Tay.
REMEX will begin construction of the metal recovery facility in October 2014 and its estimated investment for the project is about S$15 million. The metal recovery facility, expected to begin operation by mid-2015, will be able to process up to 1,800 tonnes of IBA per day generated by the four incineration plants (i.e. Tuas Incineration Plant, Senoko Waste-to-Energy Plant, Tuas South Incineration Plant and Keppel Seghers Tuas Waste-to-Energy Plant).
REMEX, which specialises in metal recovery from IBA and operates similar facilities in the Netherlands and Germany, has set up a local, wholly owned subsidiary in Singapore known as M/s REMEX Minerals Singapore Pte Ltd, to operate the metal recovery facility.