EMISSIONS OF METAL AND ORGANIC-COMPOUNDS FROM CEMENT KILNS USING WASTE DERIVED FUELS

Research completed to date suggests that the use of waste as a substit ute fuel in cement kilns is fundamentally sound in theory, and in a nu mber of cases, has been demonstrated sound in practice. Analysis of th e database generated in certificate of compliance tests clearly demons trate that cement plants burning waste-derived fuel (WDF) can employ e xisting technology to meet and in some cases exceed current emission r egulations. With the exception of cement kilns using raw materials wit h high levels of hydrocarbons, the emission of organics can be control led by applying well-established good-combustion practices. Metals emi ssions from cement plants burning WDF can be predicted based upon inpu t metal flow rates, provided that plant-specific information on the co llection efficiency of air pollution control equipment and by-pass flo w rates are available.