| OCR Text |
Show quickly restarted but, the SCC burners were not turned on. This caused the generation of furans from partial combustion of PCB remaining in the kiln. Consequently, the process water system was contaminated with these furans. The contamination of the process water system was not discovered until a trial burn test was completed the next day. The complete process water system was later decontaminated using carbon filters. A risk analysis was performed on this incident in accordance with the US EPA guidelines (7). From this risk analysis, it was determined that this incident did not result in any significant impact on the surrounding population. The primary lesson learned from this experience is that should the kiln rotation be stopped, the SCC burners must not be turned off. Operators have been instructed to ensure that SCC burners are kept on if at all possible. CONCLUSIONS Based on the demonstrated test results, it is concluded that the modifications made to the MIS have been successful. The capacity of the MIS has been increased by more than a factor of 2. The MIS presently is permitted to burn dioxin-contaminated materials at 4000 lb/hr. The problem of particulate accumulation in the SCC, requiring its frequent clean-up, has been completely alleviated. The cyclone and the WEP have demonstrated excellent performance in solving that problem. Successful operations with very low density vermiculite has been demonstrated. Tests with mixtures of brominated sludge, soil and sodium sulfate have also been successful. The on-stream factor of the MIS has improved considerably since the system has been modified. For a relatively trash-free soil, the MIS on-stream factor would be more than 70%. ACKNOWLEDGEMENTS The work on the project described in this paper was performed under the sponsorship of U.S. Environmental Protection Agency Contract Number 68-03-3255. The authors wish to acknowledge the contributions and dedication of many people from EPA Region VII, Enviresponse, Inc., and its subcontractors. The successful performance of the Mobile Incinerator would not have been possible without the excellent teamwork of a large number of professionals and technicians. |
