Semakau Landfill (SL), the only landfill in Singapore, calls for practical solutions to extend its lifetime beyond 2035. Landfill mining combined with material reuse from the waste is a viable solution to urban landfills, but has never been applied to
a landfill containing a mixture of incineration bottom ash, incineration fly ash, and other non-incinerable waste with potential contaminants of concern, namely SL.
We propose a series of innovative technological solutions for site investigation (SI) and material reuse aiming at “breaking the ground” in SL. We aim to deliver: 1) a suite of geotechnical-geophysical-geoenvironmental (SI) techniques and SI datasets of SL; 2) lab characterization and a 3D distribution and evolution model of the MM in SL; 3) treatability assessment of excavated MM and testbed design for treatment train; 4) reusability assessment of excavated and treated MM; and 5) Optimal decisions for sustainable management of SL based on different decision-making criteria.
