BBP Environment Gmbh

Mercury Control for MWCs Using the Sodium Tetrasulfide Process

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Courtesy of BBP Environment Gmbh

When various technologies for mercury (Hg) control in Municipal Waste Combustors (MWCs), not only ecological but also economical criteria are decisive in restricting waste processing costs to a justifiable rate. The use of additives provides a significant potential, especially for plants already equipped with a spray dryer/bag house system for achieving compliance at a relatively low cost.The use of sodium tetrasulfide (Na2S4) as an additive for the inexpensive control of Hg emissions is presented as a possibility to combine both ecology and economy. Particularly with the new requirements in the US and Germany, this technology offers the opportunity to bring most MWCs into compliance with respect to their Hg emissions.

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