LEACHATE TREATMENT PLANT
A state-of-the-art leachate treatment plant is in place to treat leachate output from the landfill. The plant is based primarily on biological reaction with a series of chemical dosing to achieve the required leachate treatment standards. It is equipped with 4 sequential batch reactor (SBR) lagoons, 24 aerators, chemical storage and dosing system, balancing tanks, sludge thickener and a dissolved air flotation plant. The SCADA system controls all the pumps and valves, enabling the plant to operate automatically. The plant has a treatment capacity in excess of 1,000 cubic meters per day for methanogenic leachate.
Treated leachate is conveyed to the reed beds for final polishing. The reed beds consist of Phragmites plant capable of absorbing residues in the treated leachate to further improve its quality. BTSL is the first and only landfill in the region using the reed beds polishing process.
4 leachate holding-ponds on site provide 180,000 cubic meters leachate storage capacity to attenuate peak flows during wet seasons. The holding ponds also provide leachate storage when the leachate treatment plant is undergoing maintenance.