Abstract:Co-processing of DDT[2,2-bis(4-chlorophenyl)-1,1,1-trichloroethane] via a modern preheater/precalciner kiln system was characterized. DDT contained waste was fed at the inlet of transition chamber with feeding rate of 1 t/h. Concentration of DDT and PCDD/Fs of flue gas in main stack under co-processing and blank operation was measured. Additionally, the raw meal, clinker and bag filter fly ash during the co-processing operation were sampled for analysis of DDT and PCDD/Fs. The destruction efficiency (DE), destruction and removal efficiency (DRE) for DDT were 99.99953% and 99.999982%, respectively, suggesting DDT was effectively destructed. The average PCDD/Fs concentration of flue gas was 0.014ng TEQ/Nm3, which was greatly lower than the national limit of 0.1ng-ITEQ/Nm3, furthermore, there was no significant change to the PCDD/Fs emission comparing with baseline. Under the co-processing of DDT condition, the PCDD/Fs emission factor for flue gas and clinker were respectively 0.0396μg/t and 0.220μg/t. The comparison of operational parameters and conventional pollutant concentration indicated there was no negative influence on the clinker production during DDT co-processing.