Pollutant Generation Characteristics and Environmental Impact Analysis during Co-combustion of Municipal Solid Waste and Sewage Sludge

• • Combustion temperature and blending ratio significantly affect burnout; temperature dominates, with optimal SS mass fraction at 20% for combustion performance. • • N2O and C2H4 emissions are highly sensitive to temperature, blending ratio, and their interaction; N2O formation is markedly suppressed by increasing temperature (e.g., from 850 to 1050 °C). • • Co-combustion with 20% SS reduces SO2 emissions and achieves synergistic NO reduction at 950 °C, while CO, C2H4, C6H6, and C7H8 show antagonistic effects. • • ANN models accurately predict pollutant emissions; combustion temperature, volatile matter, and fixed carbon are key factors. Higher temperatures lower GWP and POCP, but lower MSW proportion increases GWP and AP.