The utilization of lathe waste as a catalyst for the treatment of landfill leachate in supercritical water conditions

Abstract

In this study, the treatment of landfill leachate in supercritical water conditions with and without catalyst use was investigated. A real waste, namely lathe waste, was used as the catalyst. The experiments were made at a constant 25 MPa pressure, at four reaction temperatures in the range of 450-600°C and four reaction times between 60 and 150 s. Through the experiments, the impacts of reaction temperature, reaction time and the use of lathe waste catalyst on landfill leachate treatment were investigated. The efficiency of the treatment was evaluated in terms of liquid reaction products’ total organic carbon (TOC) and total nitrogen (TN) conversions. As a result, it was seen that elevated reaction temperatures and long residence times favored TOC conversions. On the contrary, greater TN reductions were encountered at lower reaction temperatures. The use of lathe waste was observed to promote the treatment efficiency for all experimental runs. The highest TOC conversion was seen at 600°C and 150s conditions, which was 57.2% for the noncatalytic treatment. The employment of lathe waste improved this value to 66.9%. As for TN, the highest conversion was encountered at 450°C and at a reaction time of 150 s. At the foresaid reaction conditions, using

Keywords

• Landfill Leachate
• Lathe Waste Treatment
• Supercritical Water

References

1. [1] Anand N, Palani SG. A comprehensive investigation of toxicity and pollution potential of municipal solid waste landfill leachate. Sci Total Environ 2022;838:155891. [CrossRef]
2. [2] Chen G, Wu G, Li N, Lu X, Zhao J, He M, et al. Landfill leachate treatment by persulphate related advanced oxidation technologies. J Hazard Mater 2021;418:126355. [CrossRef]
3. [3] Keyikoglu R, Karatas O, Rezania H, Kobya M, Vatanpour V, Khataee A. A review on the treatment of membrane concentrates generated from landfill leachate treatament process. Sep Purif Technol 2021;259:118182. [CrossRef]
4. [4] Civan F, Özaltun DH, Kıpçak E, Akgün M. The treatment of landfill leachate over Ni/Al2O3 by supercritical water oxidation. J Supercrit Fluids 2015;100:714. [CrossRef]
5. [5] Ergene D, Aksoy A, Sanin FD. Comprehensive analysis and modeling of landfill leachate. Waste Manag 2022;145:4859. [CrossRef]
6. [6] Bandala ER, Liu A, Wijesiri B, Zeidman AB, Goonetilleke A. Emerging materials and technologies for landfill leachate treatment: A critical review. Environ Pollut 2021;291:118133. [CrossRef]
7. [7] Argun ME, Akkuş M, Ateş H. Investigation of micropollutants removal from landfill leachate in a full-scale advanced treatment plant in Istanbul city, Turkey. Sci Total Environ 2020;748:141423. [CrossRef]
8. [8] Singh SK, Tang WZ. Statistical analysis of optimum Fenton oxidation conditions for landfill leachate treatment. Waste Manag 2013;33:8188. [CrossRef]

9. [9] Ahmed FN, Lan CQ. Treatment of landfill leachate using membrane bioreactors: A review. Desalination 2012;287:4154. [CrossRef]
10. [10] Gout E, Monnot M, Boutin O, Vanloot P, Claeys-Bruno M, Moulin P. Assessment and optimization of wet air oxidation for treatment of landfill leachate concentrated with reverse osmosis. Process Saf Environ Prot 2022;162:765774. [CrossRef]
11. [11] Saxena V, Padhi SK, Dikshit PK, Pattanaik L. Recent developments in landfill leachate treatment: Aerobic granular reactor and its future prospects. Environ Nantochnol Monit Manag 2022;18:100689. [CrossRef]
12. [12] Wijekoon P, Koliyabandara PA, Cooray AT, Lam SS, Athapattu BCL, Vithanage M. Progress and prospects in mitigation of landfill leachate pollution: Risk, pollution potential, treatment and challenges. J Hazard Mater 2022;421:126627. [CrossRef]
13. [13] Gautam P, Kumar S, Lokhandwala S. Advanced oxidation processes for treatment of leachate from hazardous waste landfill: A critical review. J Clean Prod 2019;237:117639. [CrossRef]
14. [14] Chen Y, He Y, Jin H, Guo L. Resource utilization of landfill leachate gasification in supercritical water. Chem Eng J 2020;386:124017. [CrossRef]
15. [15] Martins DCC, Scandelai APJ, Cardozo-Filho L, Tavares CRG. Supercritical water oxidation treatment of humic acid as a model organic compound of landfill leachate. Can J Chem Eng 2020;98:868878. [CrossRef]
16. [16] Ates H, Argun ME. Fate of PAHs under subcritical and supercritical conditions in landfill leachate: Removal or formation? Chem Eng J 2021;414:128762. [CrossRef]
17. [17] de Souza GBM, Pereira MB, Mourão LC, dos Santos MP, de Oliveira JA, Garde IAA, et al. Supercritical water technology: An emerging treatment process for contaminated wastewaters and sludge. Rev Environ Sci Biotechnol 2022;21:75104. [CrossRef]
18. [18] Gong Y, Guo Y, Sheehan JD, Chen Z, Wang S. Oxidative degradation of landfill leachate by catalysis of CeMnOx/TiO2 in supercritical water: Mechanism and kinetic study. Chem Eng J 2018;331:578586. [CrossRef]
19. [19] Gong Y, Lu J, Jiang W, Liu S, Wang W, Li A. Gasification of landfill leachate in supercritical water: Effects on hydrogen yield and tar formation. Int J Hydrogen Energ 2018;43:2282722837. [CrossRef]
20. [20] Scandelai APJ, Zotesso JP, Jegatheesan V, Cardozo-Filho L, Tavares CRG. Intensification of supercritical water oxidation (ScWO) process for landfill leachate treatment through ion exchange with zeolite. Waste Manag 2020;101:259267. [CrossRef]
21. [21] Eaton AD, Clesceri LS, Greenberg AE. Standard Methods for the Examination of Water and Wastewater 19th ed. Washington DC: American Public Health Association; 1995.
22. [22] Ibroşka T, Kıpçak AS, Aydın Yüksel S, Derun E, Pişkin S. Synthesis, characterization, and electrical and optical properties of magnesium-type boracite. Turk J Chem 2015;39:10251037. [CrossRef]
23. [23] Wagner W, Prub A. The IAPWS formulation 1995 for the thermodynamic properties of ordinary water substance for general and scientific use. J Phys Chem Ref Data 2002;31:387535. [CrossRef]
24. [24] Gong Y, Wang S, Xu H, Guo Y, Tang X. Partial oxidation of landfill leachate in supercritical water: Optimization by response surface methodology. Waste Manag 2015;43:343352. [CrossRef]
25. [25] Scandelai APJ, Cardozo Filho L, Martins DCC, Freitas TKFS, Garcia JC, Tavares CRG. Combined processes of ozonation and supercritical water oxidation for landfill leachate degradation. Waste Manag 2018;77:466476. [CrossRef]