• BSc. in Agriculture (Hons). 2008, University of Peradeniya, Peradeniya. Sri Lanka.
• MPhil. in Agricultural Engineering. 2011. University of Peradeniya, Sri Lanka

• Diploma on Merging Measurement and Modelling in Soil Physics, 2012, Aarhus University, Denmark

• PhD. in Environmental Science and Infrastructure Engineering. 2014. Saitama University, Japan.

Wastewater treatment

Solid waste management

Soil and water conservation

Water quality management

1. Yohan Jayawardhana, S.S. Mayakaduwa, Prasanna Kumarathilaka, Gamage, Meththika Vithanage. 2017. Municipal solid waste derived biochar for the removal of benzene from landfill leachate. Environmental Geochemistry and Health. DOI: 10.1007/s10653-017-9973-y.
2. Sewwandi, B. G. N., Meththika Vithanage, S.S.R.M.D.H.R. Wijesekara, M.I.M. Mowjood, Shoichiro Hamamoto and Ken Kawamoto. 2014. Adsorption of Cd(II) and Pb(II)  onto Humic Acid Treated Coconut (Cocos nucifera) Husk. Hazard. Toxic Radioact. Waste, 18 (2): 1-10. DOI: 10.1061/(ASCE)HZ.2153-5515.0000196.
3. Sewwandi, B. G. N., M. Vithanage, S. S. R. M. D. H. R. Wijesekara, U. Rajapaksha, D. G. L. M. Jayarathna, and M. I. M. Mowjood. 2012. Characterization of Aqueous Pb(II) and Cd(II) Biosorption on Native and Modified Alstonia macrophylla Saw Dust. Bioremediation Journal. 16 (2): 1-12.
4. Weragoda, S. K., N. Tanaka, G. N. Sewwandi and M. I. M. Mowjood. 2010. Efficiency of coconut coir-pith as an alternative substrate in the treatment of submerged macrophyte wetland systems in tropical conditions. Chemistry and Ecology. 26 (6): 445-452.
5. Sewwandi, B. G. N., S. K. Weragoda, M. I. M. Mowjood, N. Tanaka and S. Sasikala. 2009. Effect of Submerged and Floating Plants on Dissolved Oxygen Dynamics and Nitrogen Removal in Constructed Wetlands. Tropical Agricultural Research. 21(4): 355-362.

1. S. Vithanage, B. M. Y. B. Jayawardhana, L. Weerasundara, P. Kumarathilaka and B. G. N. Sewwandi. 2016. Municipal Solid Waste Biochar to remediate its own waste; Removal of dissolved organic carbon and volatile organic compounds in landfill leachate. 16^th conference of the Science Council of Asia: Science for the People: Mobilizing Modern Technologies for Sustainable Development in Asia. 31^st May-1^st June 2016.
2. N. Paranavithana, B.G.N. Sewwandi, Takahashi Saito and Ken Kawamoto. 2014. Adsorption Characteristics of Cd(II) and Pb(II) onto Coconut Shell Biochar and Coconut Shell Activated Carbon as Media for Permeable Reactive Barriers in Sri Lanka. In proc. of 5^th International symposium on Energy from Biomass and waste, Venice 2014. 17^th to 20^th November 2014.
3. Paranavithana, G. N., G. N. Sewwandi and Ken Kawamoto. 2013. Soil characterization for the development of site-specific permeable reactive barrier in Sri Lanka: Mineralogical and surface charge properties for selected surface geologic media. 4^thInternational Conference on Structural Engineering and Construction Management 2013: Capacity Building for Development. 13-15^th Dec. 2013: 1-13.
4. Sewwandi, B. G. N., Koide Takahiro, Ken Kawamoto, Shoichiro Hamamoto, Shingo Asamoto and Hiroyasu Sato. 2013. Evaluation of leachate contamination potential of municipal solid waste dumpsites in Sri Lanka using Leachate Pollution Index. 14^th International Waste Management and Landfill Symposium. 30^th Sep-4^th Oct, 2013. Sardinia, Italy. pp. 222.
5. Sewwandi, B. G. N., Koide Takahiro, Ken Kawamoto, Shoichiro Hamamoto, Shingo Asamoto and Hiroyasu Sato.2012. Characterization of Landfill Leachate from Municipal Solid Waste Landfills in Sri Lanka. In Proc. 2^nd International Conference on Sustainable Built Environment. 14-16 December 2012. Kandy, Sri Lanka. pp 21.
6. Sewwandi, B. G. N., Koide Takahiro, Ken Kawamoto, Shoichiro Hamamoto, Shingo Asamoto and Hiroyasu Sato. 2013. Impact of landfill leachate from municipal solid waste dumpsites on environmental pollution. Japan Geoscience Union Meeting. Japan Geoscience Union, Makuhari Messe, Japan. 19-24 May 2013 (20^th May).
7. Sewwandi, B. G. N., Meththika Vithanage, M. I. M. Mowjood and Ken Kawamoto. 2012. Removal of Heavy Metals from wastewater Using Agricultural Waste Materials. Water and Environment in Asia’s Developing Communities. Lien Foundation and Singapore Membrane Technology Centre, Marina Bay Sands, Singapore. 1^st July 2012.

8. Sewwandi, B. G. N., I. M. Mowjood, Meththika Vithanage, and Ken Kawamoto. 2012. Heavy Metal Removal in Landfill Leachate Using Agricultural Waste Materials: A Case Study in Sri Lanka. Japan Geoscience Union Meeting.Japan Geoscience Union, Makuhari Messe, Japan. 20-25 May 2012 (20^th May).
9. Sewwandi, B. G. N., S. S. R. M. D. H. R. Wijesekara, A. Rajapaksha, M. I. M. Mowjood and M. Vithanage. 2011. Risk of Soil and Water Pollution by Heavy metals in Landfill Leachate. In Proc. International Conference on Agricultural Engineering “Novelty, Clean and Sustainable”. Thailand, 31^st March-1^st April 2011: pp 43.

10. Weragoda, S. K., N. Tanaka, G. N. Sewwandi, M. I. M. Mowjood and Y. Sasaki. 2010. Sequential Impact of Integrated Submerged-Floating Macrophyte Wetland Systems on Dissolved Oxygen Concentration and Nitrogen Removal Efficiency. In Proc. International Conference on Wetland Ecosystem Services: Biodiversity, Livelihoods and Sustainability. Thailand, November 17-21: pp 54.
11. Weragoda, S. K., N. Tanaka, B. G. N. Sewwandi and M. I. M. Mowjood. 2009. Evaluation of Sequential Impact of Integrated Submerged-Floating Macrophyte Wetland Systems in Wastewater Treatment. In Proc. 11^th International Summer Symposium, Tokyo: 309-312.
12. Weragoda, S. K., N. Tanaka, M. I. M. Mowjood, G. N. Sewwandi and K. B. S. N Jinadasa. 2008. Impact of Coconut Coir-Pith as an Alternative Substrate Material on Water Reclamation in Submerged Wetland Systems. In Proc. 11^th International Conference on Wetland Systems for Water Pollution Control, IWA Conference: 469-474.
13. Sewwandi, B. G. N., K. Weragoda, M. I. M. Mowjood, N. Tanaka and S. Sasikala. 2009. Pre and Post Anoxic Denitrification on Nitrogen Removal in Wetland Systems Using Submerged and Floating Macrophytes. In Proc. International Exchange Symposium on Sustainable Infrastructure Development in Asia. Sri Lanka: 187-192.
14. Weragoda, S. K., G. N. Sewwandi, M. I. M. Mowjood and N. Tanaka. 2008. Effect of Coconut Coir-Pith Supplement on enhanced water Reclamation activity in submerged plant wetland systems, In Proc. Sustainable Infrastructure Development in Asia, International Exchange Symposium: University of Peradeniya, Sri Lanka : International Collaborative Graduate Program. 124-129.
15. Sewwandi, B. G. N., K. N. K. R. Wickramaratne, D. M. R. R. Jayasinghe, M. Sangeetha, L. W. Galagedara and N. D. K. Dayawansa. 2010. Water Allocation of Begnas Lake in Nepal among Different Sectors: A comparison           with Sri Lankan Dry Zone Small Irrigation Systems. Water Resources Research in Sri Lanka. Geo-Informatics Society of Sri Lanka: 95-103.

16. Sewwandi, B. G. N., S. K. Weragoda and M. I. M. Mowjood. 2008. Performance Evaluation of Coconut Coir-Pith in Free Water Surface Constructed Wetlands. In Proc. National Symposium on Water Supply, Sanitation and Wastewater Management: Progress and Prospects Towards Clean and Healthy Society. University of Peradeniya: 39-51.

Co-investigator of National research Council of Sri Lanka research Grant NRC 15-24 for the research on Potential use of municipal solid waste derived biochar as a cover and permeable reactive barrier material for the remediation of volatile organic compounds in landfills. 2015-2017

Academic and Administrative positions held

1. Head of the Department of Biosystems Technology, Faculty of Technology, South Eastern University of Sri Lanka (SEUSL), 01.02.2017 to 31.05.2018
2. Coordinator, Research Centre- Technology for Disaster Prevention (RC-TDP), SEUSL
3. Student Counsellor, Faculty of Technology, SEUSL 01.12.2016 to 31.12.2018
4. Secretary, Industry Consultative Committee for Bachelor of Biosystems Technology Degree Program
5. Member of Senate, SEUSL, 01.02.2017 to 31.05.2018
6. Member of Leave and Awards Committee, SEUSL, 01.02.2017 to 31.05.2018
7. Member of Faculty Board, Faculty of Technology, SEUSL

Other positions held

1. Coordinator - Curriculum Development of the Bachelor of Biosystems Technology degree, SEUSL
2. Coordinator – Renovation of the Faculty of Technology premises, SEUSL
3. Co-coordinator - Orientation Program for the 1^st batch of students of Faculty of Technology, SEUSL
4. Member –Committee for Preparation of First Undergraduate Handbook 2015/2016, Faculty of Technology, SEUSL
5. Selection committee member – Committee for Recruitment of Academic and Non-Academic Staff for Department of Biosystems Technology, SEUSL

1. Participant of the workshop on Training of Trainers (TOT) workshop on “Gender Mainstreaming” organized by the University Grants Commission in Collaboration with Commonwealth of Learning on 5-7 June 2018 at Global Towers, Marine Dr, Colombo 06.
2. Participant of the Workshop on Training of Trainers (TOT) on Sustainable Consumption and Production, SWITCH-Asia Sustainable Consumption and Production: Sri Lanka National Policy Support Component: Ministry of Mahaweli Development and Environment. 20-22 December 2017.
3. Resource Person for consultative workshop on Formulation of a National Guide for Sanitary Landfills in Sri Lanka organized by JICA/SATREPS Project, SATREPS Project office, University of Peradeniya on 13^th Aug 2015.
4. Participated in the seminar on “Scientific research: planning, implementation and dissemination” on 22^nd Sep 2016 organized by SDC, SEUSL and conducted by the General Research Committee, Sri Lanka Association for Advancement of Science.
5. Participated in the workshop on “enhancing communication skills with general public and providing hands on training on audio visual material development” on 12^th Sep 2015 organized by Department of Zoology and Environmental Management, University of Kelaniya.
6. South Asian Water (SAWA) Fellows training on Participatory Field Research Methodologies, organized by South Asian Consortium for Interdisciplinary Water Resources Studies (SaciWATERs), 2009
7. Successfully completed the practical component of the course on Interdisciplinary Field Research Methodologies in Nepal as a fulfilment for the M. Phil. Degree, 2009
8. Training on Solid Waste Management in Cecil Food (Pvt) Ltd. (CBL), Ratnapura, Sri Lanka, 2007
9. Training on Operation and Maintenance of Four Wheel Tractors at Farm Mechanization Training Centre, Anuradhapura, Sri Lanka, 2007
10. Residential training on Agriculture for six months period in Dry Zone of Sri Lanka as a component of the curriculum of the BSc. degree program - Mahailluppallama Sub-Campus, Sri Lanka, 2006

1. A merit award for scientific publications in 2010 by National Research Council of Sri Lanka, awarded on 31^st Oct 2014
2. Monbugakusho Scholarship for PhD from Ministry of Education, Culture, Sports, Science and Technology of Japan, 2011-2014
3. South Asian Water (SAWA) Fellowship for M.Phil. studies from South Asia Consortium for Interdisciplinary Water Resources Studies (SaciWATERs), India, 2008-2010

1. Durrheim, R. J. and G. N. Sewwandi. 2019. Mitigating the Impact of Extreme Natural Events in Developing Countris. Centre for Science and Technology of the Non-Aligned and Other Developing Countries (NAM S& T Centre), Daya Publishing House, New Delhi. ISBN: 978-93-88982-16-0 HB).
2. Editor of the Proceedings of International Roundtable on the Impact of Extreme Natural Events: Science and Technology for mitigation. 13-15 December 2017, Colombo, Sri Lanka. ISBN 978-955-627-125-6.
3. Assistant Editor for Annual Research Journal of Sri Lanka Students’ Association in Japan (2012). ISSN 2186-474.
4. Reviewer for international journals of;

• Environmental Science and Technology
• Colloids and Surfaces A: Physicochemical and Engineering Aspects
• Bioremediation Journal
• Chemistry and Ecology
• AGRIEST, Journal of Agricultural Sciences, Eastern University, Sri Lanka.

Coordinator – International Roundtable on the Impact of Extreme Natural Events: Science and Technology for Mitigation, Colombo, Sri Lanka, 13-15 December 2017. Organized by Research Centre- Technology for Disaster Prevention, South Eastern University of Sri Lanka, National Science and Technology Commission of Sri Lanka and Centre for Science and Technology of the Non-Aligned and Other Developing Countries (NAM S&T Centre), India