Jensen, Pernille Erland2; Ferreira, Célia M. D.5; Hansen, Henrik K.8; Rype, Jens Ulrik7; Ottosen, Lisbeth M.2; Villumsen, Arne2
1 Section for Arctic Technology, Department of Civil Engineering, Technical University of Denmark2 Department of Civil Engineering, Technical University of Denmark3 Section for Construction Materials, Department of Civil Engineering, Technical University of Denmark4 Arctic Technology Centre, Center, Technical University of Denmark5 Escola Superior Agrária de Coimbra6 Universidad Tecnica Federico Santa Maria7 Jurag Separation A/S8 Universidad Tecnica Federico Santa Maria
Air pollution control (APC) residue from municipal solid waste incineration is considered hazardous waste due to its alkalinity and high content of salts and mobile heavy metals. Various solutions for the handling of APC-residue exist, however most commercial solutions involve landfilling. A demand for environmental sustainable alternatives exists and electrodialysis could be such an alternative. The potential of electrodialysis for treating APC-residue is explored in this work by designing and testing a continuous-flow bench-scale reactor that can work with a high solids content feed solution. Experiments were made with raw residue, water-washed residue, acid washed residue and acid-treated residue with emphasis on reduction of heavy metal mobility. Main results indicate that the reactor successfully removes toxic elements lead, copper, cadmium and zinc from the feed stream, suggesting that the electrodialytic technique is an alternative to land deposition of APC-residues.
Journal of Applied Electrochemistry, 2010, Vol 40, Issue 6, p. 1173-1181