Sustainable Environment
Sustainable Environment
Optimized startup procedures suppress POP emissions from waste-to-energy incinerators
This research project addresses how optimized startup procedures can significantly suppress persistent organic pollutant (POP) emissions from waste-to-energy incinerators. By analyzing the core causes of high emissions during initial startup phases, such as ash deposits, unstable combustion, and long residence times in critical temperature windows, the research introduces a series of low-cost, operationally feasible adjustments. These measures include cleaning accumulated ash, precisely controlling heating and dry-out temperatures, eliminating flue-gas bypass, and advancing activated-carbon injection. When tested across three full-scale trials, this optimized strategy achieved reductions of over 92% in chlorinated POPs and over 88% in brominated POPs, demonstrating highly effective, visible mitigation of environmental pollutants.
WASTE-TO-WASTE: SUPPRESSING SRF COMBUSTION POLLUTION AND RECYCLING ASH INTO AAC BUILDING MATERIALS
Solid Recovered Fuel (SRF) Combustion x Waste-Derived Inhibitors x Fly Ash Valorization
This research study on a circular economy model oriented around a "Waste-to-Waste" approach to thoroughly address pollution from the combustion of Solid Recovered Fuel (SRF). To address the challenge of toxic persistent organic pollutants (POPs) and heavy metal emissions from plastic or halogen contamination in SRF, the research proposes adding waste-derived inhibitors (such as waste shells, sewage sludge, and PU foam) immediately before combustion to prevent pollution at the source. Post-combustion, the hazardous fly ash undergoes a dehalogenation washing process (achieving near-complete removal of Cl- and Br-) and is subsequently recycled and verified for use in manufacturing AAC lightweight building materials. This method not only delivers superior economic efficiency compared to expensive commercial inhibitors but also completes a closed-loop cycle: pollution control -> ash regeneration -> recycling, thereby driving carbon reduction and environmental protection.