Treatment and management of sewage and industrial sludge
Agro-industrial waste management
Site remediation (soil, sediment, ground water)
Hazardous waste management using thermal processes
Participation in Research Programs and Projects
“Gasification-based syngas upgrading and purification system for enhanced power generation (WtE-CRP 1501 105)”, Funding: National Environment Agency (NEA), Singapore, Period: 2016-2019
“Pyrolysis of flexible laminate waste for oil and carbon nanotubes production”, Funding: Nestle, Period: 2018-2019
“Advanced combustion and corrosion control system for steam boilers in WtE gasification plants (WtE-CRP 1701 105)”, Funding: National Environment Agency (NEA), Singapore, Period: 2018-2021
“Feasibility study on slag re-utilisation in Singapore context”, Funding: JFE Engineering Corporation, Period: 2018-2021
Distinctions and Awards
2018 – First Aid Award (Nanyang Technological University)
2016 – Top cited paper in Applied Energy
2013 – ProSPER.Net Leadership Program (Honolulu, Hawaii, USA)
2003 – Marie-Curie Fellowship (Environmental Technology and Energy Economy, Technical University of Hamburg-Harburg, Germany)
Wang H., Liu G., Veksha A., Dou X., Giannis A., Lim T.-T., Lisak G. (2021) Iron ore modified with alkaline earth metals for the chemical looping combustion of municipal solid waste derived syngas. Journal of Cleaner Production, 282, 124467.
Wang H., Dou X., Veksha A., Liu W., Giannis A., Ge L., Lim T.-T., Lisak G. (2020) Barium aluminate improved iron ore for the chemical looping combustion of syngas. Applied Energy, 272, 115236.
Ahamed A., Veksha A., Yin K., Weerachanchai P., Giannis A., Lisak G. (2020) Environmental impact assessment of converting flexible packaging plastic waste to pyrolysis oil and multi-walled carbon nanotubes. Journal of Hazardous Materials, 390, 121449.
Veksha A., Yin K., Moo J.G.S., Oh W.D., Ahamed A., Chen W.Q., Weerachanchai P., Giannis A., Lisak G. (2020) Processing of flexible plastic packaging waste into pyrolysis oil and multi-walled carbon nanotubes for electrocatalytic oxygen reduction. Journal of Hazardous Materials, 387, 121256.
Udayanga C.W.D., Veksha A., Giannis A., Lisak G., Lim T.-T. (2019) Effect of sewage sludge organic and inorganic constituents on the properties of pyrolysis products. Energy Conversion and Management, 196, 1410 – 1419.
Udayanga C.W.D., Veksha A., Giannis A., Liang Y.N., Lisak G., Hu X., Lim T.-T. (2019) Insights into the speciation of heavy metals during pyrolysis of industrial sludge. Science of the Total Environment, 691, 232 – 242.
Phua Z.H., Giannis A., Dong Z.-L., Lisak G., Ng W.J. (2019) Characteristics of incineration ash for sustainable treatment and reutilization. Environmental Science and Pollution Research, 26(17), 16974 – 16997.
Chan W.P., Veksha A., Lei J., Oh W.D., Dou X., Giannis A., Lisak G., Lim T.-T. (2019) A hot syngas purification system integrated with downdraft gasification of municipal solid waste. Applied Energy, 237, 227 – 240.
Udayanga C.W.D., Veksha A., Giannis A., Lisak G., Chang V.W-C., Lim T.-T. (2018) Fate and distribution of heavy metals during thermal processing of sewage sludge. Fuel, 226, 721 – 741.
Veksha A., Giannis A., Oh W.D., Lisak G. (2018) Catalytic processing of non-condensable pyrolysis gas from plastics: Effects of calcium supports on nickel-catalyzed decomposition of hydrocarbons and HCl sorption. Chemical Engineering Science, 189, 311 – 319.