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Title: Physicochemical Transformation Of Heavy Metals In Sludge-biochar Produced By Pyrolysis Treatment
Authors: Chanaka Udayanga, Withanage Don
Veksha, Andrei
Giannis, Apostolos
Chang, Victor W.-C.
Lim, Teik-Thye
Keywords: Pyrolysis
Sewage Sludge
Issue Date: 2017
Source: Chanaka Udayanga, W. D., Veksha, A., Giannis, A., Chang, V. W.-C., & Lim, T.-T. (2017). Physicochemical Transformation Of Heavy Metals In Sludge-biochar Produced By Pyrolysis Treatment. Sixteenth International Waste Management and Landfill Symposium (Sardinia 2017).
Abstract: Biochars (BCs) were produced by pyrolysis of dry sewage sludge (DSS) in order to stabilize the heavy metals (HMs). The physicochemical transformations of HMs were studied during pyrolysis at different temperatures (500-700 oC) in a fixed bed reactor. The produced BCs and DSS were introduced into combustion process at 950 oC. The HMs (Cu, Cr, Zn, Ni, As and Mn) were monitored to determine the influence of pyrolysis in terms of enrichment and leachability. Volatilisation tendencies of HMs (except for As) in pyrolysis process were minimal, while the leaching properties of the BCs were lower compared to DSS (except for Zn). After combustion of BCs and DSS, the produced ashes presented comparable HMs leaching and retention characteristics, except for As that had higher retention in the final ash coming from the direct combustion of DSS.
Rights: © 2017 CISA Publisher, Italy. This paper was published in Proceedings Sardinia 2017 and is made available as an electronic reprint (preprint) with permission of CISA Publisher, Italy. The published version is available at: []. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:IGS Conference Papers

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