Concentrations and Congener Profiles of PCDD/Fs in Sludge Spray Drying-Incineration Process

Concentrations and Congener profiles of PCDD/Fs in fly ash and gas from Sludge Spray Drying- Incineration were detected by high resolution gas chromatography coupled with low resolution mass spectrometry (HRGC/LRMS). The results showed that the special technology design made the Toxic Equivalent Quantity(TEQ) concentrations of PCDD/Fs in gas were lower than 0.1 ng I-TEQ/Nm3, and zero emissions of PCDD/Fs in fly ash. PCDD/Fs emission factors of Sludge incineration is 0.122 μg I- TEQ/t, lower than PCDD/Fs emission factors of the waste class incineration in the UNEP Toolkit. The Sludge Spray Drying-Incineration process provides effective protection and a new way for sludge treatment and disposal.