Sizing and economic evaluation of a lightweight aggregate production plant with waste energy utilization · Jan 1, 2005

This article presents the technical and economic evaluation of a plant designed to produce lightweight expanded aggregates (ALER) from sewage sludge generated in Medellín’s wastewater treatment plants. Conducted by Universidad Pontificia Bolivariana, the study proposes a sustainable alternative to landfill disposal by transforming sludge into a raw material for eco-friendly construction.

The process integrates thermal treatment and energy recovery through a cogeneration system using the organic content of biosolids. A thermal model was developed to optimize plant design and assess financial viability. Results showed that ALER production without energy recovery is economically feasible at current sludge availability, offering a low-cost, structurally sound material suitable for the housing sector. This work highlights the circular potential of industrial waste and supports green innovation in urban infrastructure.

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Sizing and economic evaluation of a lightweight aggregate production plant with waste ener.

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