Combustion Characteristics and Energy Potential of Municipal Solid Waste in Arusha City, Tanzania
American Journal of Energy Engineering
Volume 3, Issue 5, September 2015, Pages: 71-77
Received: Aug. 7, 2015;
Accepted: Aug. 21, 2015;
Published: Sep. 2, 2015
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Halidini Sarakikya, Department of Electrical Engineering, Arusha Technical College, Arusha, Tanzania
Jeremiah Kiplagat, Department of Energy Engineering, Kenyatta University, Nairobi, Kenya
Municipal Solid Waste (MSW) generation has been increasing due to population growth, changing life style, technology development and increased consumption of goods. The increase of waste generation combined with the use of waste dumps may lead to environmental and social problems such as water contamination, land and atmospheric pollutions, resulting to breeding grounds for vermin, cause risk of fire, bad smell and potentially are the cause of illness. Energy recovery from municipal solid waste can alleviate these problems while providing a source of energy. The objective of this study is to evaluate the combustion properties and energy potential from municipal solid waste of Arusha, Tanzania. Incineration is among the methods for MSW treatments, and therefore, the data and information provided shows that energy can be recovered from Arusha MSW during incineration process. Energy flow (exothermic and endothermic) and thermal degradation analysis were carried out using Differential Scanning Calorimetry (DSC) and thermo – gravimetric analysis (TGA) respectively. The sample of composition of municipal solid waste examined included paper, cardboard, wood, textile, rubber, polyethylene Teraphthalate (PETE), low density polyethylene (LDPE) and food waste. These materials were heated in a combined DSC and TGA analyser and experiments were performed at heating rate of 10○C/min, in a pure nitrogen atmosphere at temperatures between room temperature and 1100 ○C. The results observed from TGA and DTG show that the highest reactivity was the samples from Central Market, followed by those from Sakina and Ngarenaro market. It was observed that municipal solid waste is less reactive to combustion compared to dry biomass, thus its reactivity can be improved by removing non- combustible materials such as metals and food scraps or by pre-treating the MSW so as to reduce the amount of oxygen present in it. The final analysis of the municipal solid waste showed that, the average percentage of nitrogen, sulfur, chlorine and phosphorus in the waste were 2.36%, 0.37%, 0.04% and 0.11% respectively, which is low and therefore, emissions released by this MSW during combustion are also low. The energy content of the solid waste tested was about 12MJ/kg on dry basis. The elemental composition shows that municipal solid waste contains 50% and 5% of carbon and hydrogen respectively.
Combustion Characteristics and Energy Potential of Municipal Solid Waste in Arusha City, Tanzania, American Journal of Energy Engineering.
Vol. 3, No. 5,
2015, pp. 71-77.
Breeze R. Municipal Waste Management in Dar es Salaam. Draft Baseline analysis prepared for the World Bank, Washington DC. (2012).
Mundi. Tanzania Urban Population (2011). Accessed at: http://www.indexmundi.com/facts/tanzania/urban-population
World Bank. Poverty Headcount Ratio (2011). Accessed at: http://data.worldbank.org/indicator/SI.POV.DDAY.
Ntakamulenga R. The status of solid waste management in Tanzania. A paper presented during the coastal East Africa on solid waste workshop (2012), Mauritius.
Arthur M et al. Potential of Municipal Solid Waste as renewable energy source: A case study of Arusha- Tanzania. International journal of renewable energy technology research (2014). Vol 6, page 8.
Terra Symbiosis. Exhaustion of fossil fuels. Nature at the heart of human development, (2014)
World Watch Institute. Coal and natural gas consumption and production, (2013)
European Commission, Environmental Data Center. Guidance on municipal Waste data collection (2012) Euro stat – unit E3.
Imed A Khatib. Municipal Solid Waste Management in Developing Countries. Future Challenges and Possible opportunities
Amin K and Go Su Yang. Identification of the Municipal Solid Waste characteristics and potential of plastic Recovery at Bakri landfill, Muar, Malasya. Journal of Sustainable Development (2012) Vol. 5 No_7.
Ministry of Finance (Government of Tanzania). National Audit Office: A performance audit on the management of solid waste in big cities and region(s) in Tanzania. Mbeya, Dar es Salaam, Mwanza and Arusha (2012).
Ryu C. Potential of Municipal Solid Waste for Renewable Energy Production and Reduction of Greenhouse gas emissions in South Korea, Air and Waste management Association vol. 60 (2010) pages 176-183.
Cheng H. and Hu Y. Municipal solid waste (MSW) as a renewable source of energy. Current and future practices in China, Bioresource Technology, vol. 101 (2010) pages 3816-3824.
Sharholy M.Ahmad K. Mahmood G and Trivedi R. Municipal solid waste management in Indian cities –A review, Waste management vol. 28 (2008).
Alexander K. and Nickolas J M. Energy recovery from Municipal Solid Wastes by gasification. North American Waste to Energy Conference (NAWTEC 11), 11 proceedings, ASME International, Tampa FL (2003). pages 241- 252.
American Society for Mechanical Engineers (ASME).Waste to Energy and materials recovery. An executive summary for a white paper submitted to congress by ASME – SWPD (2007), Washington DC.
Yang N. Zhang H. Chen M. Shao LM. and He PJ. Greenhouse gas emissions from municipal solid waste incineration in China. Impacts of waste characteristics and energy recovery, Waste Management, (2012).
Sushmita Mohapatra. Technological Options for Treatment of Municipal Solid Waste of Delhi. International Journal of Renewable Energy Research (2013). Vol. no_3.
Amin K and Go Su Yang. Energy potential from municipal solid waste in Tanjung Langsat landfill, Johor, Malasya. International Journal of Engineering Science and Technology (2011) vol. 3 no_12.
Surroop D. and Juggurnath A. Investigating the energy potential from co firing coal with municipal Solid Waste. University of Mauritius research journal (2011) vol. 17-2011.
Sveta Angelova, Dilyana Yordanova, Vanya Kyose and Ivan Dombalov. Municipal Waste utilization and disposal through gasification. Journal of Chemical Technology and Metallurgy (2013). vol.2 no_49.
JD Nixon, PK Dey, SK Ghosh and PA Davies. Evaluation of options for energy recovery from municipal solid waste in India using the hierarchical analytical network process, Energy, 2013 - Elsevier (2013).
Eleftheriou P. Energy from waste: A possible alternative energy source for Cyprus municipalities. Journal of Energy Conversion and management (2002) 43, Page 4.
Mohd H and Ridzman Z. Combustion of Municipal Solid Waste in Fixed Bed combustor for energy recovery. Journal of Applied science (2012) 12(11)page 1177.
Inesa B. Agnese L. Maija Z. Alexandr A. Valentin S and Galina T. Effect of main characteristics of pelletized renewable energy resources on combustion characteristics and heat energy production.Chemical Engineering transactions, 29 (2012), pages 901-906.
Masaharu K. Tooru D. Shinya T. Masao T and Takehiro K. Development of new stroker incinerator for Municipal Solid Waste using oxygen enrichment. Mitsubishi Heavy Industries, Technical review (2011) vol. 2.
Yong – hua LI et al. Challenges of power engineering and environment. International conference on power engineering (2007), Hangzhou, China.
Lai Z. Ma X. Tang Y and Lin H. A study on municipal solid waste (MSW) combustion in NO/O2 and CO2/O2 atmosphere from the perspective of TGA, energy, 36 (2): 819 – 824.