Research fellowship programme at Energy Program AIT, Asian Regional Research Programme in Energy, Environment and Climate (ARRPEEC). Biomass Energy in Asia: A study on Selected Technologies and Policy Options, funded by SIDA – AIT
Sustainable biomass production for energy, at Indian Institute of Science, Bangalore, India ( 4-6 Oct 1999)
Training on project coordinators under NOMA programme held in Dhaka, Bangladesh 4-5 November 2008
Staff training programme on process modeling under IRQUE project , Simulation and CFD studies at the Department of Chemical and Biomolecular Engineering , National University of Singapore, 11-25 August. 2009
Staff training programme on data acquisition and process monitoring at Telemark University, Norway on January 2010
Induction training programme for senior lecturers, 12th May 2009 to 15th December 2010 , at the staff development centre, Open University of Sri Lanka
Two day training programme on Outcomes-based curriculum development for faculties of engineering in SriLanka, by the Human resources development component of the higher education for the twenty first century (HETC) project, Min
Head : Department of Chemical and Process Engineering ( 2013 -2016)
Resource person: APELL (Awareness and Preparedness for Emergencies at Local Level), Joined research project conducted by United Nations Environmental Programme (UNEP), and Central Environmental Authority –CEA. Srilanka. September/ November 2006
Resource person and course coordinator of the short course on process development fundamentals: Chemical Engineering for Non –Chemical Engineers, Dept of Chemical and Process Engineering , University of Moratuwa, 18th May - 2nd July 2013
Resource person at Two day workshop on wastewater treatment, plant operation and monitoring, Construction Equipment Training Centre (CETRAC), Ministry of construction, Engineering Services, Housing and common Amenities, Palawatta, Battaramulla
Resource person at Tailor –made training programme for trainers on industrial waste management with special reference to Asbestos Industry, Auditorium of the Central Environmental Authority, Sri Lanka, 27th March 2007
Resource person: Asian-Norwagean partnerships in academic capacity building at a crossroads-achievements, experiences and the way ahead. NUFU/NOMA regional conference for academic project coordinators and institutional contact persons. R
Resource person: Development of National Green Public Procurement Policy and Guidelines, Team leader for Fuel and Lubricants and metal and alloys, Saptha Parisara Mandapa, Ministry of Environment and Renewable Energy, Battaramulla, 1
Resource person: SIS –SAWTEE Project : Strengthening capacity on sustainability criteria for Bio Energy (ISO 13065) in South and Southeast Asia regions. Participated for two regional workshops. 19-21 April 2011, Kathmandu ,Nepal 14-20
Award for the student who scored the highest marks in the Chemical Engineering Design Project provided the student scores more than 65% and passes the final examination for the academic year 1989/90
Final Membrane Bio Reactor (MBR) ? Network workshop , Winner or context award for the ?Best student Poster?, 31 March -1 April 2009, Berlin, Germany, by MBR ? Network and International Water association (IWA-London).
Postdoc fellowship offered by Walloon Center of Industrial Biology, Jan ?Nov 2012, Liege, Belgium
Award of Excellence in recognition of the Outstanding Research performances for the 3 years ending 31st December 2014 ? University of Moratuwa, Sri Lanka
. Award of Excellence in recognition of the Outstanding Research Performances for the 3 years ending 31st December 2015 ? University of Moratuwa, Sri Lanka
?NRC Merit Award for Scientific Publication -2014. International journal of Hydrogen Energy 2014, Vol 39, Iss 30, pp 16902-16913
E O E PEREIRA AWARD ? 2018 : The best technical paper presented at IESL annual session
STUDY ON AN INTEGRATED CONSTRUCTED WETLAND SYSTEM FOR COLOUR REMOVAL OF TEXTILE DYEING EFFLUENT-W. B. I. P. M. Fernando, D. H. Abeywardhana, -5th International research symposium on engineering advancements --pp 89-94-pp 89-94-SAITM , Malabe---2015
Investigation on sulphide inhibition of anaerobic digestion for sulphate rich wastewater. -Ms. I.R. Samarathunga-IESL Annual transactions-V.1 part B-pp. 247-25-pp. 247-25-IESL auditorium---2015
Dynamic modelling and simulation of pilot scale anaerobic digestion plant treating source separated food waste and effect of recycling sludge. --5th International Conference on Solid Waste Management ----Bangalore India---2015
Optmization of adsorption –coagulation process for treatment of palm oil mill effluent (POME) using alternative coagulant. Proceedings of the-. Asadullah-Proceedings of the 5th International research symposium on engineering advancements ----SAITM Malabe---2015
. Investigation of stability of anaerobic digestion of food waste in a plug flow reactor using matematical modeling and simulation-H.D.S.S Karunarathne -Proceedings of the 5th International research symposium on engineering advancements----SAITM Malabe---2015
Potential of Plug Flow Digesters for Biogas,Production in the Sri Lankan Domestic Context - WAS Hasangika, S Jaanuvi, HP Karunathilake, MMID Manthilake, PG Rathnasiri, AGT Sugathapala. -MERCON----UOM---2015
ORGANIZATIONAL FACTORS INFLUENCING SAFETY IN OIL AND GAS PROCESSING INDUSTRY: Focusing on the Impacts of Cost Cutting and Culture of Safety -Eng. (Dr.) Deshai Botheju, (Dr.) P.G. Rathnasiri, Eng. (Dr) Kumuduni Abeysingha. -IESL Annual transactions-Part 1---IESL---2015
Development of a Dynamic Mathematical Model for Biofilm based Microbial Fuel Cells- Eng. (ms). N.M.N.C. Marapana -IESL Annual transactions-Part 1---IESL---2015
Rathnasiri G. Puhulwella, Laurent Beckersa,Frank Delvigne, Alina S. Grigorescu, Philippe Thonart, Serge Hiligsmann. Mesophilic biohydrogen production by Clostridium butyricum CWBI1009 in trickling biofilter reactor, International Journal of Hydrogen Energy, Volume 39, Issue 30, 13 October 2014, Pages 16902–16913.
K.K.C.K. Perera, P.G. Rathnasiri, S.A.S. Senarath, A.G.T. Sugathapala, S.C. Bhattacharya, P. Abdul Salam. Assessment of sustainable energy potential of non-plantation biomass resources in Sri Lanka. Biomass and Bioenergy 29 (2005) 199–213
S.C. Bhattacharya,_, P. Abdul Salam, Hu Runqing, H.I. Somashekar, D.A. Racelis, P.G. Rathnasiri, Rungrawe Yingyuad, An assessment of the potential for non-plantation biomass resources in selected Asian countries for 2010. Biomass and Bioenergy 29 (2005)153–166
K.K.C.K. Perera, P.G. Rathnasiri, A.G.T. Sugathapala, Sustainable biomass production for energy in Sri Lanka, Biomass and Bioenergy 25 (2003) 541 – 556.
B.R.H. Peiris, P.G. Rathnasiri, J.E. Johansen, A. Kuhn and R. Bakke, ADM1 simulations of hydrogen production, Water Science & Technology, Vol 53 (2006), No 8 pp 129–137
P.G.Rathnasiri, J.E. Johansen, C. B. Drangeid and R.Bakke. Transient co-digestion plant behavior, 4th International Symposium, Anaerobic Digestion of Solid Waste, August 31- September 2, 2005, Copenhagen, Denmark
P.G. Rathnasiri, Carlos Dinamarca and R. Bakke, Membrane controlled micro-aeration in digesters. Baltic Biorefinery Symposium, 26-28 May, 2005, Aalborg University Esberg, Denmark.
B.R.H. Peiris, P.G. Rathnasiri, J.E. Johansen, A.Kuhn and R.Bakke, Hydrogen from food residues. Baltic Biorefinery Symposium, 26-28 May, 2005, Aalborg University Esberg, Denmark.
B. R. H. Peiris, P.G. Rathnasiri, J.E. Johansen, A. Kuhn and R. Bakke, ADM1 with modifications for Bio-hydrogen Simulations, The First International Workshop on the IWA Anaerobic Digestion Model No. 1 (ADM1), Sep 2-4, 2005, Lyngby, Denmark.
Deshai Botheju., Rathnasiri P.G. and Bakke R. Biofilms on oxygen transfer membranes in membrane micro-aerated anaerobic digesters (MMAD). IWA Biofilm Technologies Conferences, Singapore, 8-10, January 2008.
Asadullah, P. G. Rathnasiri, Optimization of adsorption –coagulation process fortreatment of palm oil mill effluent (POME) using alternative coagulant, International Research Symposium on Engineering Advancements 2015 (RSEA 2015) SAITM, Malabe, SriLanka.
W.B.I.P.M. Fernando, D.H. Abeywardhana and P.G. Rathnasiri, Study on an integrated constructed wetland systemfor colourremovalof textile dying effluent.International Research Symposium on Engineering Advancements 2015 (RSEA 2015) SAITM, Malabe, Sri Lanka.
H. D. S. S Karunarathne and P. G. Rathnasiri, Investigation of stability of anaerobic digestion of food waste in a plug flow reactor using mathematical modeling and simulation. International Research Symposium on Engineering Advancements 2015 (RSEA 2015) SAITM, Malabe, Sri Lanka.
WAS Hasangika, S Jaanuvi, HP Karunathilake, MMID Manthilake, PG Rathnasiri, AGT Sugathapala, Potential of Plug Flow Digesters for Biogas Production in the Sri Lankan Domestic Context, .International multidisciplinary engineering research conference, MERCON-2015, University of Moratuwa Srilanka. April 7-8, 2015.
Rathnasiri, P.G., Embuldeniya, P., Siriweera, B. & Samarasiri, B.K.T., (2017) Analysis of biomethane production from food waste as a long term renewable energy option. Second Asia- Pacific Conference on Multidisciplinary Research, 30th of July 2017, Colombo, Sri Lanka. Colombo, International Center for Research & Development. pp. 68-74.
B.K.T. Samarasiri and P.G. Rathnasiri, Effect of enzymetic hydrolysis pretreatment on batch anaerobic digestion of wastewater generated in desiccated coconut processing plants. AD Tech –SAB 2018 : The 2nd International Conference on Anaerobic Digestion Technology , Sustainable alternative bioenergy for a stable life, 4-7 june 2018, Chiang Mai, Thailand.
P.G. Rathnasiri, Dynamic Modelling and Simulation of Pilot Scale Anaerobic Digestion Plant Treating Source Separated Food Waste and Effect of Recycling Sludge, Procedia Environmental Sciences, Volume 35, 2016, Pages 740-748.
P.G. Rathnasiri, Hayun and R. Bakke, Transient response and stability of anaerobic reactors following intermittent Feeding. 13th Symposium of the Engineering Research Unit (ERU), University of Moratuwa 10th October, 2007 at Hotel Taj Samudra, Colombo
P. G. Rathnasiri, M. A. D. I. C. Kularatna, A. A. P. de Alwis, Potential of biomethane as a transport fuel and development of pilot scale co-digestion plant for treating source separated canteen waste generated at University of Moratuwa. 13th Symposium of the Engineering Research Unit (ERU), University of Moratuwa 10th October, 2007 at Hotel Taj Samudra, Colombo
M.A.D.I.C. Kularatna, A.A.P.de Alwis, P.G. Rathnasiri, Review on upgrading and application of biogas as a vehicle fuel, 14th ERU Symposium , 2008.
P.G. Rathnasiri, A.A.P de Alwis, D.W. Nuditha and M.A.D.I.C. Kularatne, Development of New Pilot scale Co- Digestion Anaerobic Process for Solid Waste Exploring new spheres for a better future, 04 December 2009, Annual symposium 2009, organized by General Sir John Kotelawala Defence University, Srilanka.
Dilnayana, K.W.N., Kularathne M.A.D.I.C., Rathnasiri P.G., Joseph P.G. and De Alwis A.A.P Optimization of an anaerobic co-digestion process and use of Bio methane as a transport fuel National Energy Symposium, 4th -8th August 2010, organized by Srilanka SustainableEnergy Authority, Ministry of Power and Energy.
Nandadeva, B.D.G.P, Amarasinghe, A.D.U.S, Rathnasiri P.G. Simulation of Air Movement in a Cinnamon Chips Dryer using Computational Fluid Dynamics, Annual Transactions of IESL, pp. 127- 132, 2012 Karunarathne, H.D.S.S and Rathnasiri P.G. Study of inhibition in plug flow anaerobic digesters using mathematical modeling and simulation. Journal of the Institution of Incorporated Engineers, Sri Lanka, pp 12-15, 2013.
Pathiranage, S.P.R. and Rathnasiri P.G. Development of new kinetic model for meshophilic biohydrogen production in trickle bed reactor using Clostridium Butyricum CWBI1009. Annual Transactions of IESL, pp. 387-393, 2013.
Wijeyekoon, S.L.J Raamashangar, K., Rathnasiri, P.GEnhancement of Hydrolysis of Anaerobic Process by Peroxonation Pre-treatment. Annual Transactions of IESL, pp. 334-341, 2012.
Achala Godawita and Rathnasiri P.G. Optimization of diary waste water treatment process using combined experimental and mathematical modeling approach, IESL, Annual Transactions, 2014.
Asadullah, P.G.Rathnasiri. Optmizaation of adsorption –coagulation process for treatment of palm oil mill effluent (POME) using alternative coagulant. Proceedings of the 5th International research symposium on engineering advancements–25th April 2015,SAITM.
H.D.S.S Karunarathneand P.G. Rathnasiri. Investigation of stability of anaerobic digestion of food waste in a plug flow reactor using matematical modeling and simulation. Proceedings of the 5th International research symposium on engineering advancements – 25th April 2015, pp. 126-129, SAITM.
W.A.S. Hasangika, S. Jaanuvi, H.P. Karunathilake, M.M.I.D Manthilake, P.G Rathnasiri, A.G.T. Sugathapala. Potential of Plug Flow Digesters for Biogas Production in the Sri Lankan Domestic Context. MERCON, 2015.
Asadullah, P.G.Rathnasiri, M.Amin, D.C.J Warnasuriya, N.D, Weerawardane and W.H.M Wickramanayaka, K.C.Niranjan Fernando. Study on effect of different Bio chars as adsorbents for wastewater treatment, Annual Transactions of IESL, pp. 139-145, 2015.
N.M.N.C. Marapana and P.G. Rathnasiri, Development of a Dynamic Mathematical Model for Biofilm based Microbial Fuel Cells. Annual Transactions of IESL, pp. 331-339, 2015,
Deshai Botheju, P.G. Rathnasiri, Kumuduni Abeysingha. Organizational factors influencing safety in oil and gas processing industry: Focusing on the Impacts of Cost Cutting and Culture of Safety Annual Transactions of IESL, pp. 193-201, 2015,
I.R. Samarathunga and P.G. Rathnasiri. Investigation on sulphide inhibition of anaerobic digestion for sulphate rich wastewater.Annual Transactions of IESL, pp. 247-257, 2015.
W. B. I. P. M. Fernando, D. H. Abeywardhana, P. G. Rathnasiri. Study on an integrated constructed wetland system for colour removal of textile dyeing effluent.Proceedings of the 5th International research symposium onengineering advancements – 25th April 2015, pp. 89-94, SAITM.
I.R. Samarathunga, P.G. Rathnasiri, M.A.R Hansaka, U.G.Y.S. Kawinda . and R.Y.B Ananda. Effect of chemical oxygen demand (COD) to Sulfate (SO4-2) ratio on Sulfate Reduction in anaerobic digestion of sulfate rich wastewater, Annual Transactions of IESL, 2016.
B.K.T. Samarasiri, P.A.D. Mihiranga and P.G. Rathnasiri, Effect of Lipid Inhibition in Anaerobic Wastewater Treatment: A Case Study using Desiccated Coconut Wastewater. Annual Transactions of IESL, 2016.
Samarasiri, B.K.T., Samarakoon, S.W.S., Rathnasiri, P.G. & Gunawardena, S.H.P., (2017) Mechanistic model for electricity generation via biomethane production through anaerobic digestion of organic fraction of municipal solid waste generated in Sri Lanka. Moratuwa Engineering Research Conference, 31st of May 2017, Moratuwa, Sri Lanka. New York, USA, IEEE Xplore. pp. 407-412.
Microbial Fuels, Technologies and Applications, Edited by Farshad Darvishi Harzevili and Serge Hiligsmann, CRC Press, Taylor & Francis Group, Book Chapter 15 on Perspectives of Microbial Fuels for Low – Income and Emerging Countries: Biogas Production