Treatment of leachate from MSWI bottom ash landfilling with anaerobic sulphate-reducing process.
Removal of sulphate and toxic elements from the leachate of a field landfill lysimeter (112m(3)), containing municipal solid waste incineration (MSWI) bottom ash, was studied. The leachate was treated in two parallel laboratory upflow anaerobic sludge blanket (UASB) reactors without and with ethanol as additional carbon source. With ethanol more than 65% of sulphate was removed, while without ethanol removal was negligible. The treatment removed Ba, Ca, Cu, Mn, Mo, Ni, Pb, Tl, Sb, Se, Sr, and Zn of the studied 35 trace and other elements. The sequential extraction of the reactor sludge at the end of runs confirmed that with a few exceptions (Ba, Ca, and Cu) the main mechanism by which the elements were removed was precipitation as sulphides.
Sivula
Leena J
LJ
Department of Biological and Environmental Science, University of Jyväskylä, P.O. Box 35, Fl-40014, Finland. leena.sivula@cc.jyu.fi
Väisänen
Ari O
AO
Rintala
Jukka A
JA
D000693:Anaerobiosis; D001464:Barium / Q000737:chemistry / Q000302:isolation & purification; D002118:Calcium / Q000737:chemistry / Q000302:isolation & purification; D002244:Carbon / Q000737:chemistry; D003300:Copper / Q000737:chemistry / Q000302:isolation & purification; D000431:Ethanol / Q000737:chemistry; D017745:Incineration; D019216:Metals, Heavy / Q000737:chemistry / Q000302:isolation & purification; D010084:Oxidation-Reduction; D012037:Refuse Disposal; D013431:Sulfates / Q000737:chemistry* / Q000302:isolation & purification; D014131:Trace Elements / Q000737:chemistry / Q000302:isolation & purification; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000737:chemistry* / Q000302:isolation & purification
D019216:Metals, Heavy; D013431:Sulfates; D014131:Trace Elements; D014874:Water Pollutants, Chemical; D001464:Barium; D000431:Ethanol; D002244:Carbon; D003300:Copper; D002118:Calcium