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Conversion of Solid waste into energy is the most resourceful process to combat landfill saturation and environmental impression. Bhutan, with an exponential rise in the waste production, Waste to Energy (WTE) conversion is an alternative solution for municipal solid waste management (MSW). The study for MSW composition and its energy potential analysis for Memelakha (Thimphu) and Pekarshing (Phuntsholing) landfills was done to resolve the waste management challenges in the country. The standard number of samples from two dumpsites were used to analyze for the waste characterization (waste composition, proximate analysis, chemical analysis) and high heating value (HHV) of MSW. MSW of two landfills showed that the main elemental constituents were Carbon and Oxygen with 17.26% and 9.97% by mass respectively for Pekarshing and 16.52% (Carbon) and 11.07% (Oxygen) by mass for Memelakha landfill. Based on the physio-chemical analysis of MSW, the average calorific HHV of MSW obtained were 10.028 MJ/kg (26.04% of coal energy) for Pekarshing dumpsite and 9.6 MJ/kg (24.94% of coal energy) for Memelakha. The analysis showed that by the year 2050 Memelakha landfill has the potential to generate the power of 8.85 Megawatt (MW) and 1.44 Megawatt (MW) for Pekarshing. For (WTE) conversion, incineration, pyrolysis, and gasification technologies are found suitable based on the current composition MSW of Bhutan. Furthermore, in terms of energy efficiency and percentage of wastage, the gasification process was the most feasible method for WTE conversion at two locations with a waste volume reduction of 80 to 90 percent at the landfill.


Chemical Analysis Calorific Value Municipal Solid Waste Proximate Analysis Waste to Energy

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How to Cite
Choden, Y., Tenzin, T. ., K., K., Norbu , K. ., Wangmo, S. ., & Zangmo, P. . (2021). Estimation of energy content in municipal solid waste of Bhutan and its potential as alternate powers source. Environment Conservation Journal, 22(1&2), 27–33.


  1. Agamuthu, P. 2013. “Landfilling in Developing Countries.” Waste Management and Research 31(1): 1–2.
  2. ASTM D5231-92(2003). 2003. "ASTM D5231-92(2003), Standard Test Method for Determination of the Composition of Unprocessed Municipal Solid Waste", ASTM International, West Conshohocken, PA.
  3. D240-19, ASTM. 2019. “ASTM D240-19, Standard Test Method for Heat of Combustion of Liquid Hydrocarbon Fuels by Bomb Calorimeter", ASTM International, West Conshohocken, PA.
  4. E1755, ASTM. 2020. “ASTM E1755-01(2020), Standard Test Method for Ash in Biomass", ASTM International, West Conshohocken, PA.
  5. E872-82, ASTM. 2019 “Standard Test Method for Volatile Matter in the Analysis of Particulate Wood Fuels", ASTM International, West Conshohocken, PA.
  6. Eggleston H.S., Miwa K., Srivastava N. and Tanabe K. 2007. "IPCC 2008, IPCC 2006 Guidelines for National Green House Gas Inventories". Retrieved:
  7. GNHC. 2000. "Bhutan nationa human development". Retrived:
  8. World Bank. 2018."What a waste 2.0, A global snapshot of Solid waste managament to 2050".Retrieved:
  9. Gross National Happiness Comission. 2019. "Twelfth Five Year Plan (2018-2023) Phuentsholing Thromde".Retrieved: Phuentsholing - Thromde.pdf.
  10. Gupta, S., Mohan, K., Prasad, R., Gupta, S., & Kansal, A. 1998. Solid waste management in India: options and opportunities. Resources conservation and recycling, 24(2), 137-154..
  11. Matsakas, L., Gao, Q., Jansson, S., Rova, U., & Christakopoulos, P. 2017. Green conversion of municipal solid wastes into fuels and chemicals. Electronic Journal of Biotechnology, 26, 69-83.
  12. Menikpura, Nirmala, Benedict Francis, and Antony Basnayake. 2007. “Application of Waste to Energy Concept Based on Experimental and Model Predictions of Calorific Values for Enhancing the Environment of Kandy City Estimations and Mathematical Model Predictions of Energy.” Tropical Agricultural Research Vol. 19: 389 - 400.
  13. Moya, Diego, Clay Aldás, Germánico López, and Prasad Kaparaju. 2017. “Municipal Solid Waste as a Valuable Renewable Energy Resource: A Worldwide Opportunity of Energy Recovery by Using Waste-To-Energy Technologies.” Energy Procedia 134: 286–95.
  14. Mukherjee, C., Denney, J., Mbonimpa, E. G., Slagley, J., & Bhowmik, R. 2020. A review on municipal solid waste-to-energy trends in the USA. Renewable and Sustainable Energy Reviews, 119, 109512.
  15. National Environment Commission. 2016. "Royal Government of Bhutan State of the Environment Report". Retrieved
  16. National Statistics Bureau. 2018. "National Report 2017 Population and Housing Census of Bhutan". Retrieved:
  17. Penjor, Sonam. 2019. “Fighting Waste with Waste- the Story of Phuntsholing Landfill.” Bhutan Broadcast Service.
  18. Phuntsho, Sherub, Ichharam Dulal, Dechen Yangden, and Ugyen M Tenzin. 2010. “Studying Municipal Solid Waste Generation and Composition in the Urban Areas of Bhutan.” Waste Management & Research, 28: 545–551. DOI: 10.1177/0734242X09343118 (December 2008): 545–51.
  19. Van Prevelen, D. 2007. “Coal Typology and Conversion Factors.” Applied energy (8): 514.
  20. Rai, Rajesh. 2021. “Phuentsholing Adopts Japanese Landfill System.” Kuensel. -adopts-japanese - landfill-system/.
  21. Rezaei, Hamid, Fahimeh Yazdan Panah, C. Jim Lim, and Shahab Sokhansanj. 2020. “Pelletization of Refuse-Derived Fuel with Varying Compositions of Plastic, Paper, Organic and Wood.” Sustainability (Switzerland) 12(11): 1–11.
  22. Royal Government of Bhutan. 2017. "Population & Housing Census of Bhutan_Chukha". Retrieved
  23. Royal Society for Protection of Nature.2018." Policy Framework for Solid Waste Management". Retrived:
  24. S. Manuja, A.Kumar, S.Pandey. 2018. “Greenhouse Gas Emissions from the Informal Sector in India.” International Journal of Latest Engineering Research and Applications (IJLERA) 3(1): 17–26.
  25. Sahito, Abdul Razaque, Rasool Mahar, Zuhaib Siddiqui, and Khan Muhammad Brohi. 2013. “Estimating Calorific Values of Lignocellulosic Biomassfrom Volatile and Fixed Solids.” International Journal of Biomass & Renewables (Cv): 1–6.University of Washington. 2005. “Energy Content of Fuels.” Hand Out: 1–10.
  26. Yeshi Choden, M.P. Sharma. 2020. “‘Energy Potential of MSW of Roorkee City.’” Indian Journal of environmental protection 40(4): 408–12.