Trimegah Bangun Persada

Waste Management

We are firmly committed to the responsible management of all residual materials and waste created during our operations, and to the prevention of negative impacts on people and the environment.  The company has obtained and complies with all requisite government permits for its facilities, and follows relevant good practices.

Nickel Processing By Products

Nickel processing at TBP produces two kinds of residual materials:

1) Tailings originating from the hydrometallurgical High-Pressure Acid Leach (HPAL) process; and.

2) Nickel slag, originating from the pyrometallurgical Rotary Kiln Electric Furnace (RKEF) smelting process.

Dry Stack Tailings Facility

To manage tailings from the HPAL process, we use a method called ‘dry stacking’. Through this approach, tailings are neutralized, filtered, and compacted to form an unsaturated deposit that is low in moisture. The dehydrated tailings are then placed in a Dry Stack Tailing Facility (DSTF), which is located in a disused-mining area close to the production plant. Regular monitoring of the DSTF includes toxicity tests of the tailings, water quality tests around the facility area, and facility stability evaluations., All activities comply with the relevant government regulations and standards.

According to research by AME Mineral Economics Pty Ltd, DSTF is recognized as the most low-risk form of tailings management.

Nickel Slag Pile Storage Facility

Nickel slag is categorized as non-hazardous waste, according to Indonesian Government Regulation Number 22 of 2021 about concerning the Implementation of Environmental Protection and Management. Nickel slag is created during pyrometallurgical processes and therefore has low moisture content. TBP’s nickel slag pile storage facility is located in a former mining pit.

As an indication of our commitment to reusing and recycling, we obtained a government permit to repurpose nickel slag in building materials such as concrete blocks and bricks, which we utilize in the construction of buildings, roads, water pipes, and various other facilities. To ensure safety, we conduct toxicity tests on our nickel slag. Studies have shown that slag nickel is not categorized as a hazardous or toxic (B3) waste material.  

Other Hazardous Waste

Other hazardous waste (excluding tailings) is collected and stored on-site in a licensed temporary storage facility for hazardous waste. We subcontract licensed and approved third-party service providers to manage these hazardous and toxic waste materials.


Other non-Hazardous Waste

Other non-hazardous waste (excluding nickel slag) includes domestic waste, which is collected systematically. Our KIO/TPS Integrated Waste Management Site (Kawasan Industri Obi/ Tempat Pengolahan Sampah Terpadu) is currently under construction and will manage all organic and inorganic domestic waste.

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