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Bagasse energy cogeneration potential in the Zimbabwean sugar industry

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  • Mbohwa, Charles

Abstract

The cogeneration of steam and electricity has become the norm in the sugarcane industry worldwide. This process has been taken further to a stage where sugar companies can export a substantial amount of energy to the grid. Mauritius and Reunion Islands have implemented state of the art technology in bagasse energy cogeneration. It is on this basis that the potential for cogeneration in Zimbabwe’s sugar industry is being examined. The findings indicate that it is technically feasible to implement such a project. A full economic and financial feasibility study would still need to be done. Two plants of 105 MW each can be put in place, providing about 517 GWh of clean bagasse firm power to the Zimbabwe Electricity Supply Authority. Bagasse would be used during the crop season and coal during the off-crop season. Coal usage during the off-season, will enable the exportation of extra power to the grid. This kind of project, which can save money for the utility, meets about 8% of the country’s electrical energy needs, reduces the amount of foreign currency needed to import electricity, results in improved efficiency in the sugar industry and can avoid the use of 293 750 tonnes of coal, hence avoiding the emission of 885 000 tonnes of carbon dioxide and the production of 47 000 tonnes of coal ash. The sugar millers would accrue revenue benefits equal to those revenues from selling sugar that accrue to the milling activities only.

Suggested Citation

  • Mbohwa, Charles, 2003. "Bagasse energy cogeneration potential in the Zimbabwean sugar industry," Renewable Energy, Elsevier, vol. 28(2), pages 191-204.
    • Handle: RePEc:eee:renene:v:28:y:2003:i:2:p:191-204
    DOI: 10.1016/S0960-1481(02)00023-X
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    Citations

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    Cited by:

    1. Raj, N. Thilak & Iniyan, S. & Goic, Ranko, 2011. "A review of renewable energy based cogeneration technologies," Renewable and Sustainable Energy Reviews, Elsevier, vol. 15(8), pages 3640-3648.
    2. Parawira, W & Murto, M & Zvauya, R & Mattiasson, B, 2004. "Anaerobic batch digestion of solid potato waste alone and in combination with sugar beet leaves," Renewable Energy, Elsevier, vol. 29(11), pages 1811-1823.
    3. Jingura, Raphael Muzondiwa & Musademba, Downmore & Kamusoko, Reckson, 2013. "A review of the state of biomass energy technologies in Zimbabwe," Renewable and Sustainable Energy Reviews, Elsevier, vol. 26(C), pages 652-659.
    4. Arshad, Muhammad & Ahmed, Sibtain, 2016. "Cogeneration through bagasse: A renewable strategy to meet the future energy needs," Renewable and Sustainable Energy Reviews, Elsevier, vol. 54(C), pages 732-737.
    5. Singh, Omendra Kumar, 2019. "Exergy analysis of a grid-connected bagasse-based cogeneration plant of sugar factory and exhaust heat utilization for running a cold storage," Renewable Energy, Elsevier, vol. 143(C), pages 149-163.
    6. Röder, Mirjam & Stolz, Nico & Thornley, Patricia, 2017. "Sweet energy – Bioenergy integration pathways for sugarcane residues. A case study of Nkomazi, District of Mpumalanga, South Africa," Renewable Energy, Elsevier, vol. 113(C), pages 1302-1310.
    7. Grisi, Edson F. & Yusta, Jose M. & Dufo-López, Rodolfo, 2012. "Opportunity costs for bioelectricity sales in Brazilian sucro-energetic industries," Applied Energy, Elsevier, vol. 92(C), pages 860-867.
    8. Musango, Josephine K. & Brent, Alan C., 2011. "Assessing the sustainability of energy technological systems in Southern Africa: A review and way forward," Technology in Society, Elsevier, vol. 33(1), pages 145-155.
    9. Khatiwada, Dilip & Seabra, Joaquim & Silveira, Semida & Walter, Arnaldo, 2012. "Power generation from sugarcane biomass – A complementary option to hydroelectricity in Nepal and Brazil," Energy, Elsevier, vol. 48(1), pages 241-254.
    10. Mutanga, Shingirirai Savious & de Vries, Marne & Mbohwa, Charles & Kumar, Dillip Das & Rogner, Holger, 2016. "An integrated approach for modeling the electricity value of a sugarcane production system," Applied Energy, Elsevier, vol. 177(C), pages 823-838.

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