A scenario-based assessment examined sawdust–polypropylene co-pyrolysis at 500 °C for community heavy-metal adsorbent production. Estimated capital expenditure was THB 46,000 and unit cost THB 316/kg, below referenced commercial activated carbon. The base social-return ratio was 1.39:1, while the hybrid scenario still produced a positive net balance of 3.082 kg CO2e/kg.
Key findings
- Modelled production costs were lower than the commercial activated-carbon benchmarks used. • The base SROI was 1.39:1, driven largely by water-quality and health benefits. • Economic, social, and carbon estimates are screening scenarios rather than demonstrated community performance.
Why this matters globally
The study offers an integrated early-stage framework for screening circular-economy technologies across cost, carbon, and social value. Investment decisions should await pilot evidence and a complete life-cycle assessment.
Thai researcher contribution
Researchers from the University of Phayao, Burapha University, Chaiyaphum Rajabhat University, and Mahasarakham University framed the analysis around rural Thai communities, linking biomass and plastic waste with water remediation and health.
Limitations to consider
Key outputs are gate-to-gate, scenario-based estimates rather than observed community operation. Yield, prices, carbon credits, service life, and monetised social outcomes materially affect the conclusions.
Verify the original sources
EnergiesEnergies↗DOI: 10.3390/en19143330