All Wastes Lead to Our Secured Landfill

The Secured Landfill is one of the most important components of the Waste Management Centre as it is the final destination of all wastes sent for treatment here. The landfill site is some 80 acres in area to accommodate the construction of 8 secured landfill cells with a total volume of 2.5 million cubic meters.

Landfill Acceptance Criteria

As it is a permanent waste disposal facility, all waste materials have to meet the strict Landfill Acceptance Criteria as provided for under the Department of Environment Secured Landfill Licensing Conditions. Only inorganic solid waste that meets all parameters of the Landfill Acceptance Criteria is eligible for direct landfill disposal. Otherwise, the waste will have to be treated at either the solidification or incineration plant.

Secured Landfill Design

The secured landfill is designed to prevent seepage of leachate into ground water with a double membrane comprising a one-meter thick compacted clay liner and a 2 mm thick High Density Poly-Ethylene geo-membrane. Above the HDPE membrane is a drainage system made up of a 0.4-meter thick layer of crushed rocks. Rainwater, which percolates from the top of the landfill, is called leachate and it is channelled to the leachate collection sump found within each landfill cell.

Landfill Operation

External Waste
All drum wastes arriving at the Waste Management Centre is sent to the Waste Reception Centre to be opened and physically examined to confirm the declaration made in the consignment note. The load will then be moved to the landfill for final disposal upon receipt of confirmation test results from the Laboratory Service Department. Otherwise, the consignment will be brought to the respective treatment plant storage.

Waste can be disposed off in the landfill in drums, polypropylene bags, in bulk or in solidified form. Radioactive, infectious and explosive wastes are not treated or disposed off at this Waste Management Centre. The records, including the consignment note numbers, amount and location are kept at the landfill office.

Leachate Management