EFFECTIVE EMISSION REDUCTION WHEN USING S ECONDARY MATERIALS AT THE SIGGENTHAL CEMENT WORKS IN SWITZERLAND

The first POLVITEC(R) activated coke filter to be installed in the cem ent industry went into operation early in 1994 at the Siggenthal cemen t works in Switzerland This activated coke filter was augmented by an SNCR system for reducing the nitrogen oxides formed in the burning pro cess. The acceptance measurements carried out during continuous, stead y-state operation were able to demonstrate the excellent collecting ef ficiency of this this process, even when using secondary fuels and mat erials. The return on investment period is very short, due to the repl acement of fossil fuels and the revenue from waste disposal fees.