Phutikiatkajorn, J. and Sriwiriyarat, T. (2020). Computer program development for simulation of activated sludge biological wastewater treatment system with Microsoft Excel. The 6th Conference on Research and Creative Innovations (CRCI2020). Rajamangala University of Technology Lanna, Chiang Mai, Thailand (In Thai)

Klinhom, N. and Sriwiriyarat, T. (2015). Biological Nitrogen Removal Efficiencies of Integrated Fixed Film Activated Sludge (IFAS) Installed with Media in Anoxic or Aerobic Reactor. The 10th National Conference of Sripatum University, Bangkok, Thailand.

Kuhakaew, S., Nuchlek, P., and Sriwiriyarat, T. (2012). Effects of Cations on Treatment Efficiencies of Integrated Fixed Film Activated Sludge Wastewater Treatment Process, Proceedings, The 3rd National Conference of Phranakhon Rajabhat University, Bangkok, Thailand.

Nuchlek, P., Kuhakaew, S., and Sriwiriyarat, T. (2012). Effects of pH on Nitrification of Integrated Fixed Film Activated Sludge Wastewater Treatment Process, Proceedings, The 3rd National Conference of Phranakhon Rajabhat University, Bangkok, Thailand.

Mukhthong, M., Mongkontummakul, A. Detcheewa, P. and Sriwiriyarat, T. (2012). Possibility of Total Dissolved Solids Removal in Industrial Effluents by Algae Chlorella sp. and Scenedesmus sp., Proceedings, The 3rd National Conference of Phranakhon Rajabhat University, Bangkok, Thailand.

Jangkorn, S, Vongsrikaew, K., Pratoom, C., and Sriwiriyarat, T. (2009). Evaluation of Optimum Mixing and Settling Time Requirements for Mixed Surfactants-Containing Industrial Wastewater Treatment, Proceedings, “Global Warming: Biodiversity and Sustainable Utilization”, Kasetsart University, Nakorn Phatom, Thailand (in Thai)

Sriwiriyarat, T., Siriphrom, K., Kaewpanao, N., and Puansuchjar, A. (2007), Feasible Use of Electrical Conductivity for Optimizing Polymer Dosage and Mixing Time Requirement in Sludge Conditioning, Proceedings, The 17th Thailand Chemical Engineering and Applied Chemistry Conference, Environmental and Safety Technology (EN), Chiangmai, Thailand