Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8869847 | Waste Management | 2018 | 12 Pages |
Abstract
Co-pyrolysis with sewage sludge was proved to be an efficient pre-treatment for sanitary landfill of municipal solid waste incineration (MSWI) fly ash (FA). In this study, to improve the stabilization effect of heavy metals, mixed ferrous/ferric sulfate was added into the FA/SS mixture before pyrolysis. To examine the feasibility of the landfill of co-pyrolysis char, toxicity characteristic leaching procedure (HJ/T300) was conducted. In addition, physio-chemical characteristics of char were also tested to explain the stability of heavy metals, including the speciation, mineralogical composition and the morphological features of them. The results indicated that within the range that the obtained char could meet the standard for landfill (GB16889-2008), the appropriate addition of mixed ferrous/ferric sulfates benefit to raising the FA ratio in the FA/SS mixture. The maximum ratio of 67â¯wt% is achieved when the additive was 1.5â¯wt% of dried SS (based on iron element) and the pyrolysis temperature was 500â¯Â°C.
Keywords
ICP-OESMSWIEDSBCRLSDPolychlorinated dibenzo-p-dioxins and dibenzofuransMSWI fly ashPCDD/FsInductively coupled plasma optical emission spectrometryanalysis of varianceANOVACo-disposalleast significant differenceFly ashMunicipal solid waste incinerationEnergy Dispersive SpectrometerSewage sludgeMicrowave-assisted acid digestionHeavy metalX-ray diffractionXRDPyrolysis
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Geotechnical Engineering and Engineering Geology
Authors
Yuyan Hu, Fan Yang, Fangfang Chen, Yuheng Feng, Dezhen Chen, Xiaohu Dai,