Ash2Salt is a treatment process for air pollution control residues (APCR). The Ash2Salt technology reduces the amount of fly ash to be disposed of and produces salts that can be returned to society as commercial products, thus reducing the extraction of virgin resources. At the end of the process, industrial-grade salts are obtained with a purity of >99%.
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Advantages
Sustainable solution for WtX plants to turn their hazardous waste into usable material to as part of the circular economy be returned to society.
Reduction in volume of landfills. Landfill costs can be reduced, and lifetime can be extended.
Non-hazardous landfill of the filter cake according to
2003/33/EC, 2.3. “Criteria for hazardous waste acceptable at landfills”
Leachability within limits, stabilised Heavy Metals as HM sulphites
Cl2 Content <1% (EU directive <2.5%)
The treated fly ash residue can be disposed of in a non-hazardous landfill within the limits of EU legislation. This lowers landfill costs. ~30 % (dry to dry) mass to landfill of the filter cake.
Salt recovery from fly ash. The salt can be commercialised.
Washing of fly ash without a discharge of chlorides.
High tolerance for variations in chloride content in the fly ash leads to a stable output.
Use landfill leachate and process water for fly ash washing as a wastewater treatment plant. There is no effluent stream and no brine discharge.
Reduces costs and emissions associated with transporting fly ash over long distances.