Experimental Study on Solidification of Leachate Sludge with High Salt Content by Waste Incineration Bottom Slag

Authors

  • Chao Zheng
  • Kangwei Xiong
  • Jilin Jiang
  • Nan Zhang

DOI:

https://doi.org/10.62051/a9g8gs87

Keywords:

Leachate sludge; Solidification/Stabilization; Sulfoaluminate cement; Unconfined compressive strength.

Abstract

This paper takes the leachate sludge produced from the Guangzhou refuse landfill as the research object and selects sulfoaluminate cement as the fixation to solidify/stabilize the sludge. Meanwhile, bottom-slag is selected as the supplementary fixation. Through unconfined compressive strength test and Scanning electron microscope (SEM), the effect of the mixing amount of cement and bottom-slag on the sludge’s strength is systematically studied. Results show that sulfoaluminate cement can improve the strength of solidified sludge. Sulfoaluminate cement can increase the strength of samples by promoting the hydration reaction, but the effect is better when the content exceeds 40%. When the cement content is fixed, the strength of the sample increases with the bottom slag content. When the bottom slag content exceeds 10%, the proportion of cement in the hydration reaction will decrease, and then the strength of the sample will increase first and then decrease. In addition, under different cement contents, the sample will reach the peak value when the bottom slag content is 10%. Thus, 40% cement + 10% bottom slag is the relative optimal content. 

Downloads

Download data is not yet available.

References

Liu, Jiangang, et al. "Study on detecting leachate leakage of municipal solid waste landfill site." Waste Management & Research 33.6 (2015): 588-592.

Sun, Xiao-chen, et al. "Evolution of geomembrane degradation and defects in a landfill: Impacts on long-term leachate leakage and groundwater quality." Journal of Cleaner Production 224 (2019): 335-345.

Lin, Weian, et al. "Geotechnical Engineering Properties of Solidified Sludge in Qizishan Landfill Site, China." The International Congress on Environmental Geotechnics. Springer, Singapore, 2018.

Zhu, Chun Peng, Hai Qing Wu, and Li Wei Wang. "An Experimental Study on Basic Engineering Properties of Paper Sludge Ash (PS Ash)." Applied Mechanics and Materials. Vol. 90. Trans Tech Publications Ltd, 2011.

Ivšić-Bajčeta, Dragana, et al. "A solidification/stabilization process for wastewater treatment sludge from a primary copper smelter." Journal of the Serbian Chemical Society 78.5 (2013): 725-739.

He, J.; Feng, X.Y.; Zhou, L.R.; Zhang, L. Utilization of soda residue and ground granulated blast furnace slag to stabilize/solidify sewage sludge in leachate soaking environment. Water Sci. Eng. 2021, 14, 304-313, doi:10.1016/j.wse.2021.08.007.

Qian, Guangren, et al. "Utilization of MSWI fly ash for stabilization/solidification of industrial waste sludge." Journal of hazardous materials 129.1-3 (2006): 274-281.

Hu, Wei, et al. "Mechanical and microstructural characterization of geopolymers derived from red mud and fly ashes." Journal of Cleaner Production 186 (2018): 799-806.

Zhao, H.X.; Zhou, F.S.; Evelina, L.M.A.; Liu, J.L.; Zhou, Y. A review on the industrial solid waste application in pelletizing additives: Composition, mechanism and process characteristics. J. Hazard. Mater. 2022, 423, 16, doi:10.1016/j.jhazmat.2021.127056.

Katsioti, M., et al. "The effect of bentonite/cement mortar for the stabilization/solidification of sewage sludge containing heavy metals." Cement and Concrete Composites 30.10 (2008): 1013-1019.

He, Jun, et al. "The effect of leachate seepage on the mechanical properties and microstructure of solidified sludge when used as a landfill temporary cover material." Waste Management 130 (2021): 127-135.

General Institute of Water Resources and Hydropower Planning and Design, M.o.W.R.N.I.o.W.R.S. Geotechnical test method standards. 2019, GB/T 50123-2019, 717.

Ning, Xun An, et al. "Experimental Study on the Solidification/Stabilization of Textile Dyeing Sludge." Advanced Materials Research. Vol. 197. Trans Tech Publications Ltd, 2011.

Carsana, Maddalena, et al. "Improving durability of reinforced concrete structures by recycling wet‐ground MSWI bottom ash." Materials and Corrosion 67.6 (2016): 573-582.

Collivignarelli, Carlo, and Sabrina Sorlini. "Reuse of municipal solid wastes incineration fly ashes in concrete mixtures." Waste Management 22.8 (2002): 909-912.

Keulen, A., et al. "High performance of treated and washed MSWI bottom ash granulates as natural aggregate replacement within earth-moist concrete." Waste management 49 (2016): 83-95.

Minane, Jacques Rémy, et al. "Upgraded mineral sand fraction from MSWI bottom ash: an alternative solution for the substitution of natural aggregates in concrete applications." Procedia engineering 180 (2017): 1213-1220.

Kim, Jinyoung, et al. "Effect of chemical treatment of MSWI bottom ash for its use in concrete." Magazine of Concrete Research 67.4 (2015): 179-186.

Balonis, Magdalena, et al. "Impact of chloride on the mineralogy of hydrated Portland cement systems." Cement and Concrete Research 40.7 (2010): 1009-1022.

Wei, Liang, and Yi Chun Dai. "Experimental Study on Treatment of Hospital Waste Incineraten Fly Ash by Solidification Process with Cement." Advanced Materials Research. Vol. 610. Trans Tech Publications Ltd, 2013

Downloads

Published

19-03-2024

How to Cite

“Experimental Study on Solidification of Leachate Sludge with High Salt Content by Waste Incineration Bottom Slag” (2024) Transactions on Environment, Energy and Earth Sciences, 1, pp. 55–62. doi:10.62051/a9g8gs87.