Apostolos Giannis
Assistant Professor, Municipal and Hazardous Solid Waste Management  and Treatment

Toxic and Hazardous Waste Management Laboratory
Division I: Environmental Management

Extended CV (pdf)


  • Office: Κ1.128
  • Tel.: +30 28210 37819 FAX: +30 28210 37850
  • Email: agiannis@enveng.tuc.gr
  • Office Hours: Daily 9:00-17:00


  • 2008: PhD, Department of Environmental Engineering, Technical University of Crete
  • 2003: M.Sc., Department of Environmental Engineering, Technical University of Crete
  • 2001: B.Sc. in Environmental Sciences, Department of Environment, University of the Aegean

Research Interests

  • Waste management (Waste-to-Energy (WtE), Waste-to-Materials (WtM), landfilling)
  • 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)

Recent Publications

  • 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.
  • Oh W.D., Lisak G., Webster R., Liang Y.-N., Veksha A., Giannis A., Moo J.G.S., Lim J.-W., Lim T.-T. (2018) Unravelling the thermolytic transformation of lignocellulosic biomass waste to redox-active carbocatalyst: Durability of surface active sites. Applied Catalysis B: Environmental, 233, 120 – 129.
  • Veksha A., Giannis A., Chang V.W.C. (2017) Conversion of non-condensable pyrolysis gases from plastics into carbon nanomaterials: Effects of feedstock and temperature. Journal of Analytical and Applied Pyrolysis, 124, 16 – 24.
  • Menon A., Wang J.-Y., Giannis A. (2017) Optimization of micronutrient supplement for enhancing biogas production from food waste in two-phase thermophilic anaerobic digestion. Waste Management, 59, 465 – 475.
  • Tong H.H., Yin K., Ge L., Giannis A., Chuan V.W.L., Wang J.-Y. (2015) Monitoring transitory profiles of leachate humic substances in landfill aeration reactors. Journal of Hazardous Materials, 287, 342 – 348.