RESOURCE EFFICIENT MANAGEMENT OF MSW INCINERATION FLY ASH THE CASE OF VIENNA
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1 RESOURCE EFFICIENT MANAGEMENT OF MSW INCINERATION FLY ASH THE CASE OF VIENNA A. Purgar 1,2, D. Blasenbauer 1,2,J. Fellner 1, O. Mallw 1, F. Winter 2 1) Christian Dppler Labratry fr Anthrpgenic Resurces, Inst. fr Water Quality, Resurce and Waste Management, Vienna University f Technlgy, Austria 2) Inst. fr Chemical Engineering, Vienna University f Technlgy, Austria
2 Intrductin Aim f the present case study: Increasing the resurce efficiency regarding fly ash fr Vienna's waste incineratin cluster. 2
3 45 kt/a fly ash Anthrpgenic Resurces Scheme f Viennas facilities 13 lines: ~10 6 t/a A) FBC B) grate furnace C) rtary kiln D) heat transfer zne E) cke injectin F) electrstatic precipitatr r fabric filter G) scrubbers H) fixed bed activated cke adsrptin I) selective catalytic reductin 3
4 Grate Ash Grate Ash Grate Ash Grate Ash FBC Ash FBC Ash Rtary Kiln Ash Anthrpgenic Resurces Investigated fly ash flws type biler fly ash filter fly ash fly ash fuel MSW MSW MSW MSW RDF sewage sludge hazardus waste technlgy grate furnace FBC rtary kiln residue landfill criteria TDS: ttal disslved slids eluat prperties (Pb, TDS) Ttal Cntent f Hg eluat prperties (Pb,Zn,Cd,TDS) cement stabilizatin residue landfill nn-hazardus hazardus waste landfill 4
5 Alternatives preventin and minimizatin reuse recycling energy recvery dispsal Recycling: Separatin f filter- and biler ash Phsphrus Fly ash cnsists f % biler ash Limestne A waste flw similar less hazardus cmpnents is gained Zinc Strng dependent n the existent facility 5
6 grate furnace biler ash (MSW) grate furnace filter ash (MSW) grate furnace fly ash (MSW) grate furnace fly ash (MSW) FBC fly ash (RDF) FBC fly ash (sludge) rtary kiln fly ash (haz. waste) % Anthrpgenic Resurces Phsphrus recycling minimizatin recycling dispsal metals phsphrus matrix elements P 2 O 5 cntent in % Minimum cncentratin fr phsphrus based fertilizer [Fertilizer Ordinance 2003] 6
7 % Si,Al,Ca,Fe cement prductin rtary kiln fly ash (haz.waste) minimizatin recycling dispsal grate furnace fly ash (MSW) grate furnace filter ash (MSW) grate furnace biler ash (MSW) metals phsphrus matrix elements grate furnace fly ash (MSW) FBC fly ash (sludge) FBC fly ash (RDF) Cl SO Na2O K2O P2O SiO Al2O Fe2O CaO
8 cement prductin Cncentratins f elements in mg/kg f FBC-fly ash frm RDF utilizatin cmpared t recmmendatins in the study: Dispsal in the cement-industry [BUWAL,Schweiz] cncentratin recmmendatin n.k. n.k. n.k. Ba Cd Cl C Cr Cu Hg Ni Pb Se Sn V Zn 8
9 grate furnace biler ash (MSW) grate furnace filter ash (MSW) grate furnace fly ash (MSW) grate furnace fly ash (MSW) FBC fly ash (RDF) FBC fly ash (sludge) rtary kiln fly ash (haz. waste) % Anthrpgenic Resurces Recycling minimizatin recycling dispsal metals phsphrus matrix elements Cntent f: Ag,Ni,Cu,Cd,Pb,Sb,Zn,C,M,Sn 9
10 scrubber water FLUREC - prcess fly ash extractin vessel (ph value f 4-5) Hg - remval residue landfill additinal HCl public sewer waste water treatment (mdified frm BSH Umwelttechnik GmbH) recycling r. dispsal 10
11 FLUREC - prcess Zn (99,99% pure) Zn Aqueus Zn Zn Organic Zn Pb Cu Cd (mdified frm BSH Umwelttechnik GmbH) 11
12 FLUREC - prcess minimizatin recycling dispsal metals phsphrus matrix elements FLUREC Savings and csts f implementing the FLUREC - prcess [Purgar,2015] 12
13 Fly ash decntaminatin Alternative t cement stabilizatin Eluat Criteria (Pb, Zn, Cd, TDS) Ttal Cntent f Hg minimizatin recycling eluat prperties eluat prperties Hg cntent dispsal thermal treatment wet chemical treatment (washing) nn hazardus waste landfill 13
14 Wet chemical treatment (lab scale) With a slight water washing prcedure the cntent f TDS can be reduced. Eluat prperties (Pb, Cd, Zn) are changed. 14
15 Thermal treatment (industrial scale) Thermal treatment in an existent incineratr Over a perid f 5 days, 100 tns were utilized Fcus n: technical feasibility reduced capacities residue qualities 15
16 Summary Minimizatin: By separating biler and filter fly ash a less hazardus waste flw is generated. Recycling: A recycling strategy, except fr phsphrus (mn - cmbustin f sewage sludge), is nt feasible frm an ecnmical pint f view. Alternative Dispsal: A cmbined apprach f thermal and wet chemical treatment is under investigatin. First results are prmising. 16
17 Thank yu fr yur attentin! A. Purgar 1,2, D. Blasenbauer 1,2,J. Fellner 1, O. Mallw 1, F. Winter 2 amn@planetamn.at 1) Christian Dppler Labratry fr Anthrpgenic Resurces, Inst. fr Water Quality, Resurce and Waste Management, Vienna University f Technlgy, Austria 2) Institute fr Chemical Engineering, Vienna University f Technlgy, Austria 17
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