Comparison of the Characteristics of Fly Ash Generated from Bio and Municipal Waste: Fluidized Bed Incinerators

Materials

Karolina Schwendtner¹  Mudassar Azam²  Florian Wesenauer²  Saman Setoodeh Jahromy²  Franz Winter²  Waseem Raza³ 

[1] Institute for Chemical Technology and Analytics, TU Wien, Getreidemarkt 9, 1060 Vienna, Austria;Institute of Chemical, Environmental and Bioscience Engineering, TU WIEN, Getreidemarkt 9, 1060 Vienna, Austria;State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, China;

关键词: heavy metal;    fly ash;    leaching;    hazardous waste;    fluidized bed combustion;   

DOI  :  10.3390/ma12172664

来源: DOAJ

【 摘 要 】

European solid waste incinerator plants still primarily use grate furnace technology, although circulating fluidized bed (CFB) technology is steadily expanding. Therefore, few investigations have reported on the environmental assessment of fly ash from fluidized incinerators. This research project aims to integrate information on fly ash derived from the combustion of municipal solid waste (FA1) and biomass (FA2) in fluidized bed incinerator facilities. Fly ash samples were comparatively analyzed by X-ray diffraction (XRD), X-ray fluorescence spectroscopy (XRF), scanning electron microscopy (SEM), and inductively coupled plasma optical emission spectroscopy (ICP-OES) to study the mineralogy, morphology, total heavy metal content, and leaching behavior, respectively. The analysis revealed that the two types of fly ash differ in their characteristics and leaching behavior. The concentration of most of the heavy metals in both is low compared to the literature values, but higher than the regulatory limits for use as a soil conditioner, whereas the high contents of Fe, Cu, and Al suggest good potential for metal recovery. The leaching ability of most elements is within the inert waste category, except for Hg, which is slightly above the non-hazardous waste limit.

【 授权许可】

Unknown