Onsite Treatment of Wastes in Municipal Waste Incinerator: Co-sintering of Fly Ash and Leachate Sludge into Value-added Ceramic Granule

Overview

Journal Heliyon

Specialty Social Sciences

Date 2023 Sep 28

PMID 37767513

Authors

Yujie Xue

Xiaochen Lin

Houhu Zhang

Dong Zou

Jizhi Zhou

Yufeng Zhang

Affiliations

Soon will be listed here.

Abstract

The leachate sludge (LS) and fly ash (FA) are the foci of hazardous wastes which generated from the municipal solid waste incineration (MSWI). The current work developed a new way to use energy from MSWI process for the on-site sintering of LS and FA at a relatively low temperature. With the assistance of CaF, granule of LS and MSWI FA were co-sintered. The influence of temperature, the mass of CaF, and the mass ratio of LS/MSWI FA were investigated. As a result, heavy metals volatilization and leaching in the form of chlorinated salts were controlled. In addition, CaF improved the compressive strength of the granule under low-temperature sintering. Moreover, the scale-up co-sintering test was achieved in an MSWI chamber. The results showed that the optimum condition was sintering at 973K for 1 h. The compressive strength of sintered product reached 4.25 MPa, which met the standard of ceramic granule. Moreover, with the addition of CaF, the volatilization rate of Pb, Zn, and Cd decreased by 6%, 7%, and 6%, respectively. This method can be a promising technique for the utilization of solid wastes.

References

Shao Y, Shao Y, Zhang W, Zhu Y, Dou T, Chu L . Preparation of municipal solid waste incineration fly ash-based ceramsite and its mechanisms of heavy metal immobilization. Waste Manag. 2022; 143:54-60. DOI: 10.1016/j.wasman.2022.02.021. View

Li B, Fan H, Ding S, Luan Y, Sun Y . Influence of Temperature on Characteristics of Particulate Matter and Ecological Risk Assessment of Heavy Metals during Sewage Sludge Pyrolysis. Materials (Basel). 2021; 14(19). PMC: 8510102. DOI: 10.3390/ma14195838. View

Yu J, Sun L, Ma C, Qiao Y, Xiang J, Hu S . Mechanism on heavy metals vaporization from municipal solid waste fly ash by MgCl₂⋅6H₂O. Waste Manag. 2016; 49:124-130. DOI: 10.1016/j.wasman.2015.12.015. View

Zhou Y, Liao C, Zhou Z, Chang C, Shih K . Effectively immobilizing lead through a melanotekite structure using low-temperature glass-ceramic sintering. Dalton Trans. 2019; 48(12):3998-4006. DOI: 10.1039/c9dt00320g. View

Zhao C, Lin S, Zhao Y, Lin K, Tian L, Xie M . Comprehensive understanding the transition behaviors and mechanisms of chlorine and metal ions in municipal solid waste incineration fly ash during thermal treatment. Sci Total Environ. 2021; 807(Pt 2):150731. DOI: 10.1016/j.scitotenv.2021.150731. View

Yang Y, Shi S, Zhu C, Chen X, Hao Y, Yan L . Immobilization of chromium in real tannery sludge via heat treatment with coal fly ash. Chemosphere. 2023; 335:139180. DOI: 10.1016/j.chemosphere.2023.139180. View

Shi Y, Li Y, Yuan X, Fu J, Ma Q, Wang Q . Environmental and human health risk evaluation of heavy metals in ceramsites from municipal solid waste incineration fly ash. Environ Geochem Health. 2020; 42(11):3779-3794. DOI: 10.1007/s10653-020-00639-7. View

Chen P, Zheng H, Xu H, Gao Y, Ding X, Ma M . Microbial induced solidification and stabilization of municipal solid waste incineration fly ash with high alkalinity and heavy metal toxicity. PLoS One. 2019; 14(10):e0223900. PMC: 6797113. DOI: 10.1371/journal.pone.0223900. View

Wang X, Jin Y, Wang Z, Nie Y, Huang Q, Wang Q . Development of lightweight aggregate from dry sewage sludge and coal ash. Waste Manag. 2008; 29(4):1330-5. DOI: 10.1016/j.wasman.2008.09.006. View

10.

Han S, Song Y, Ju T, Meng Y, Meng F, Song M . Recycling municipal solid waste incineration fly ash in super-lightweight aggregates by sintering with clay and using SiC as bloating agent. Chemosphere. 2022; 307(Pt 2):135895. DOI: 10.1016/j.chemosphere.2022.135895. View

11.

Wong G, Gan M, Fan X, Ji Z, Chen X, Wang Z . Co-disposal of municipal solid waste incineration fly ash and bottom slag: A novel method of low temperature melting treatment. J Hazard Mater. 2020; 408:124438. DOI: 10.1016/j.jhazmat.2020.124438. View

12.

Phua Z, Giannis A, Dong Z, Lisak G, Ng W . Characteristics of incineration ash for sustainable treatment and reutilization. Environ Sci Pollut Res Int. 2019; 26(17):16974-16997. DOI: 10.1007/s11356-019-05217-8. View

13.

Zhao X, Yang J, Ning N, Yang Z . Chemical stabilization of heavy metals in municipal solid waste incineration fly ash: a review. Environ Sci Pollut Res Int. 2022; 29(27):40384-40402. DOI: 10.1007/s11356-022-19649-2. View

14.

Wang F, Lu X, Shih K, Liu C . Influence of calcium hydroxide on the fate of perfluorooctanesulfonate under thermal conditions. J Hazard Mater. 2011; 192(3):1067-71. DOI: 10.1016/j.jhazmat.2011.06.009. View

15.

Huang S, Chang F, Lo S, Lee M, Wang C, Lin J . Production of lightweight aggregates from mining residues, heavy metal sludge, and incinerator fly ash. J Hazard Mater. 2006; 144(1-2):52-8. DOI: 10.1016/j.jhazmat.2006.09.094. View

16.

Liu S, Zhao S, Liang Z, Wang F, Sun F, Chen D . Perfluoroalkyl substances (PFASs) in leachate, fly ash, and bottom ash from waste incineration plants: Implications for the environmental release of PFAS. Sci Total Environ. 2021; 795:148468. DOI: 10.1016/j.scitotenv.2021.148468. View

17.

Huang T, Liu L, Zhou L, Yang K . Operating optimization for the heavy metal removal from the municipal solid waste incineration fly ashes in the three-dimensional electrokinetics. Chemosphere. 2018; 204:294-302. DOI: 10.1016/j.chemosphere.2018.04.065. View

18.

Zhang Z, Huang Y, Zhu Z, Yu M, Gu L, Wang X . Effect of CaO and montmorillonite additive on heavy metals behavior and environmental risk during sludge combustion. Environ Pollut. 2022; 312:120024. DOI: 10.1016/j.envpol.2022.120024. View

19.

Wang X, Jin Y, Wang Z, Mahar R, Nie Y . A research on sintering characteristics and mechanisms of dried sewage sludge. J Hazard Mater. 2008; 160(2-3):489-94. DOI: 10.1016/j.jhazmat.2008.03.054. View

20.

Atanes E, Cuesta-Garcia B, Nieto-Marquez A, Fernandez-Martinez F . A mixed separation-immobilization method for soluble salts removal and stabilization of heavy metals in municipal solid waste incineration fly ash. J Environ Manage. 2019; 240:359-367. DOI: 10.1016/j.jenvman.2019.03.122. View