International Journal of Scientific & Technology Research

Home About Us Scope Editorial Board Blog/Latest News Contact Us
10th percentile
Powered by  Scopus
Scopus coverage:
Nov 2018 to May 2020


IJSTR >> Volume 9 - Issue 8, August 2020 Edition

International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616

Techno-Economic Aspects Of Electricity Generation From A School Biogas Digester

[Full Text]



Nothando K. Mkhabela, Patrick Mukumba, Golden Makaka



Biogas technology, techno-economic analysis, animal waste, human waste.



This study assesses the technical and economic aspects of electricity generation from school biogas digesters using human wastes as substrate. The study focuses on all rural low-income schools with an enrolment of 300, 500, 700, 900 and 1100 learners respectively. The research is important The schools’ total energy demands of 1342kWh, 2082 kWh, 2491 kWh, 2683 kWh and 3093 kWh /month respectively. The designed biogas digesters have volumes of 4 m3, 7 m3, 9 m3, 12 m3 and 14 m3 respectively. The profitability values were 35%, 53 %, 56%, 58%, and 59%, respectively. Finally, the payback period values are 2.6 years, 1.9 years, 1.8 years, 1.7 years and 1.6 years respectively. The study is recommended because it will not only provide energy for all rural low- income schools, but also help reduce air pollution, environmental pollution and help the schools to generate some income from selling the biogas.



[1] Modisane M. Energy price report. Energy Data Collection, Management and Analysis. Department of Energy, 2018.
[2] Mukumba P, Makaka G, Mamphweli S, Masukume P. Design, construction and mathematical modeling of the performance of a biogas digester for a family, Eastern Cape Province, South Africa. S Afr J Sci.2019; DOI:10.1080/20421338.2019.1577028.
[3] Mukumba P, Makaka G, Mamphweli S. Anaerobic digestion of donkey dung for biogas production.J.energySouth.Afr.July/August 2016; 112(7/8).
[4] Nape KM, Magama P, Moeletsi ME, Tongwane MI, Nakana PM, Mliswa VK et al. Introduction of household biogas digesters in rural farming households of the Maluti-a-Phofung municipality, South Africa.2019;vol30(2):p. 28–37.
[5] Fahriansyah M ,Andrianto A, Sriharti S. Design of conventional mixer for biogas digester-2019;p. 34.
[6] Ugwu SN, Christopher C. EnweremaduL. Biodegradability and kinetic studies on biomethane production from okra (Abelmoschusesculentus) waste.S Afr J Sci. 2019; 115(7/8).
[7] Anagnostaki A. Biogas Plant Installation in the Region of Brandenburg, Germany: Environmental Impacts-Safety Aspects and Risk Application.Eart & Envi Scie Res & Rev. 2019; 2 (2 )
[8] Mutungwazi A, Mukumba P, Makaka G. Renewable and Sustainable Energy Reviews.2017; 172-180.
[9] Kalinda T. An Assessment of the Challenges affecting Smallholder Farmers in Adopting Biogas Technology in Zambia.2019; 9; 1: 48.
[10] Santos-Clotas E, Cabrera-Codony A , Castillo A, Martín MJ, Poch M, Monclús H. Environmental Decision Support System for Biogas Upgrading to Feasible Fuel. 2019:12: 1546. DOI:10.3390/en12081546.
[11] Mishra S, Ojha S, Adhya T. Biogas Technology. NIPA.2019 ;ISBN: 978-93-87973-52-7.
[12] Carlu E, Truong T, Kundevski M. Biogas opportunities for Australia. ENEA consulting. 2019.
[13] Baccioli A, Ferrari L, Guiller R, Yousfi O, Vizza F, Desideri U, 2019. Feasibility Analysis of Bio-Methane Production in a Biogas Plant. A Case Study. 2019; 12:473.
[14] Kiselev A, Magari E, Magari R, Panepinto D, Ravina M, Zanetti MC. Towards Circular Economy: Evaluation of Sewage Sludge Biogas Solutions. 2019;l8:91. DOI:10.3390/Resources8020091.
[15] Mukumba P, Makaka G, Mamphweli S, Misi S. A possible design and justification for a biogas plant at Nyazura Adventist High School, Rusape, Zimbabwe. J.energySouth.Afr.November 2013; 24(4):12-21.
[16] Geerolf L. The biogas sector development: Current and future trends in Western and Northern Europe. 2018.
[17] Antoine M, Mazzega E, Mathieu C. Biogas and biomethane in Europe. 2019; ISBN 979-10-373-0025-6.
[18] Alkhalidi A, Khawaja MK, Amer KA, Nawafleh AS, Al-Safadi MA. Portable Biogas Digesters for Domestic Use in Jordanian Villages.MDPI.2019; 4:21. DOI: http://doi.10.3390/recycling4020021.
[19] Mukumba P, Makaka G, Mamphweli S. Mathematical Modelling of the Performance of a Biogas Digester Fed with Substrates at Different Mixing Ratios.Asian J.Sci.Res.2018;2: 256-266.ISSN 1992-1454 DOI: 10.3923/ajsr.2018.256.266.