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標題: Biostabilization assessment of MSW co-disposed with MSWI fly ash in anaerobic bioreactors
作者: Lo, H.M.
Liu, M.H.
Pai, T.Y.
Liu, W.F.
Lin, C.Y.
Wang, S.C.
Banks, C.J.
Hung, C.H.
Chiang, C.F.
Lin, K.C.
Chen, P.H.
Chen, J.K.
Chiu, H.Y.
Su, M.H.
Kurniawan, T.A.
Wu, K.C.
Hsieh, C.Y.
Hsu, H.S.
關鍵字: MsW;MSWI fly ash;Anaerobic digestion;Landfill;Gas production;municipal solid-waste;acid-neutralizing capacity;sewage-sludge;heavy-metals;bottom ash;residues;digestion;requirements;extraction;strategies
Project: Journal of Hazardous Materials
期刊/報告no:: Journal of Hazardous Materials, Volume 162, Issue 2-3, Page(s) 1233-1242.
Municipal solid waste incinerator (MSWI) fly ash has been examined for possible use as landfill interim cover. For this aim, three anaerobic bioreactors, 1.2 in high and 0.2 m in diameter, were used to assess the co-digestion or co-disposal performance of MSW and MSWI fly ash. Two bioreactors contained ratios of 10 and 20 g fly ash per liter of MSW (or 0.2 and 0.4 gg(-1) VS, that is, 0.2 and 0.4 g fly ash per gram volatile solids (VS) of MSW). The remaining bioreactor was used as control, without fly ash addition. The results showed that gas production rate was enhanced by the appropriate addition of MSWI fly ash, with a rate of similar to 6.51 day(-1) kg(-1) VS at peak production in the ash-added bioreactors, compared to similar to 41 day(-1) kg(-1) VS in control. Conductivity, alkali metals and VS in leachate were higher in the fly ash-added bioreactors compared to control. The results show that MSW decomposition was maintained throughout at near-neutral pH and might be improved by release of alkali and trace metals from fly ash. Heavy metals exerted no inhibitory effect on MSW digestion in all three bioreactors. These phenomena indicate that proper amounts of MSWI fly ash, co-disposed or co-digested with MSW, could facilitate bacterial activity, digestion efficiency and gas production rates. (C) 2008 Elsevier B.V. All rights reserved.
ISSN: 0304-3894
DOI: 10.1016/j.jhazmat.2008.06.028
Appears in Collections:水土保持學系

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