Development and Control Factor Derivation for Recycling Scrubber Effluent for Incinerator Flue Gas Treatment

ABSTRACT This study explores a wastewater reuse method for the wet scrubber system used in incinerator flue gas treatment. Analysis of actual scrubber wastewater revealed particulate matter with a mode size of 62.22 μm, primarily due to activated carbon used for dioxin removal. High concentrations of SO₄ 2− (9607 mg/L) and Cl − (8305 mg/L) were observed, originating from acidic gases such as SOx and HCl neutralized with 33% NaOH, leaving residual Na + at 12 479 mg/L. A disk filter and ion exchange process were introduced to assess wastewater reuse feasibility and optimize operational parameters through lab‐scale tests. Results confirmed that particulate removal via the disk filter and OH − substitution using ion exchange enabled wastewater reuse. Applying this process to a 100‐t/day industrial waste incineration facility is projected to recycle 80% of the scrubber wastewater, reducing annual operating costs by approximately 30.28%, or USD 232 230.