What happens to alum sludge after dewatering at Sungai Dua?

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Alum Sludge Transformed into Cement Bricks After Dewatering at Sungai Dua

Following dewatering at the Sungai Dua Dewatering Plant (SDDP), the resultant alum sludge is transported to Alam Aliran Kualiti (M) Sdn Bhd's (AAK) brick manufacturing facility located in Bukit Minyak. At this facility, the sludge undergoes a chemical treatment process to produce aggregates. These processed aggregates then serve as the primary raw material for the manufacturing of cement bricks.
Processing into Aggregates

Once the alum sludge arrives at the AAK facility in Bukit Minyak, it is subjected to a specific chemical treatment. This process is designed to convert the sludge into usable aggregates. These aggregates are a key component, forming the foundation for the subsequent production of cement bricks.
Use in Cement Brick Manufacturing

The aggregates derived from the chemically treated alum sludge are then utilised as the main constituent in the production of cement bricks. This manufacturing process employs conventional methods, supplemented by a proprietary formulation developed by AAK to ensure the final product meets established industry quality standards.
Circular Economy Initiative

This transformation of alum sludge into construction material is part of a broader circular economy initiative spearheaded by AAK in collaboration with the Penang Water Supply Corporation (PBAPP). This approach aims to manage water treatment plant residue, previously classified as scheduled waste (SW204), by converting it into a valuable resource rather than disposing of it in landfills.
Water Recovery and Waste Reduction

The dewatering process at SDDP also plays a significant role in water recovery. Approximately nine million litres of water are reclaimed daily, which would otherwise be discharged. This recovered water is reintroduced into PBAPP's water supply system, contributing to water conservation efforts.

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What happens to alum sludge after dewatering at Sungai Dua?

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