Turning Paper Mill Residues into Energy: Industrial-Scale RDF Solution Drives Circular Upgrade in Southeast Asia
At a major paper mill in Southeast Asia, what was once a growing stockpile of pulping residues and rejects has been transformed into a valuable energy resource.
Through Harden’s industrial RDF (Refuse-Derived Fuel) processing system, waste streams undergo five key stages—coarse shredding, magnetic separation, drying, fine shredding, and pelletising—to produce high-calorific RDF fuel rods.
These are continuously supplied to a local combined heat and power (CHP) plant, replacing fossil fuels such as coal and natural gas.
This integrated approach not only elevates regional standards for solid waste valorisation but also provides a scalable and replicable model for paper industry waste management.
Industrial-Grade Technology Enabling Full-Chain Conversion
The mill generates several hundred tonnes of waste daily, primarily consisting of light rejects and pulper ropes.
These materials are heterogeneous—comprising soft plastics, rubber, rigid plastics, paper fibres, and metals—and are typically characterised by high moisture content, stickiness, and processing complexity.
Historically, this has posed a persistent environmental challenge across the region.
Harden's innovative “paper production → waste generation → RDF production → CHP utilisation” closed-loop model addresses these issues at source.
By leveraging advanced engineering and system integration, the solution tackles key industry pain points—high pollution risk, low efficiency, and negative disposal economics—transforming waste handling from a cost burden into a value-generating process.
Key Process Highlights
Primary Shredding for Volume Reduction
Two-shaft shear shredders reduce irregular waste to <100 mm, significantly decreasing volume and preparing material for downstream processing.
Intelligent Separation
Integrated magnetic and eddy current separation systems efficiently recover ferrous and non-ferrous metals, protecting equipment and enabling material recycling.
Precision Fine Shredding
A single-shaft shredder with adjustable screens ensures particle size <50 mm, achieving over 95% consistency—critical for stable fuel quality.
Densification and Fuel Production
Following drying and briquetting, the material is converted into RDF fuel rods with a calorific value of 4,000–6,000 kcal/kg—comparable to coal and fully suitable for industrial combustion.
Proven Results: Environmental, Economic, and Social Impact
According to the mill's operations manager: “For years, we sought a breakthrough in environmental performance and sustainability, but waste treatment remained a bottleneck.
Harden’s solution has resolved this challenge entirely. The system is robust, user-friendly, and tailored to our operational needs.
With a capacity of 300 tonnes per day, it fully matches our waste output—enabling daily clearance and maximum resource recovery.”
Now recognised as a benchmark RDF project for paper mill waste in Southeast Asia, the installation delivers measurable benefits:
Environmental: Significant reduction in landfill disposal and associated pollution
Economic: Lower energy procurement costs and new revenue streams
Social: Job creation and workforce upskilling
By closing the loop between waste and energy, this project exemplifies how industrial-scale RDF solutions can unlock both sustainability and profitability in the paper sector.
