TITLE:
Assessing the Metal Recovery Value of Municipal Solid Waste Incineration Residues: Impact of Pretreatment on Fly Ash and Bottom Ash
AUTHORS:
Pengfei Li, Takayuki Shimaoka
KEYWORDS:
Water-Washing, Mechanical Sieving, Zinc, Copper, Lead
JOURNAL NAME:
Journal of Geoscience and Environment Protection,
Vol.11 No.10,
October
19,
2023
ABSTRACT: This paper focuses on evaluating the metal recovery
potential of Municipal Solid Waste Incineration (MSWI) residues, with
particular emphasis on the influence of pretreatment methods on MSWI fly ash
and bottom ash. We assess the effectiveness of these pretreatments in enhancing
the concentration of valuable metals and compare the metal content before and
after treatment. Our findings reveal that water washing significantly enhances
fly ash’s zinc and copper content, surpassing the minimum industrial-grade
requirements. Mechanical sieving is an efficient pretreatment method for bottom
ash, with the zinc concentration inversely related to particle size.
Additionally, copper content peaks in the 1 - 2 mm particle size range for both bottom ash samples. These results provide
valuable insights into the potential for metal recovery from MSWI residues.
They hold significance for relevant research, engineering practices, and policy
formulation.