Document Type : Original Article


1 Department of Biology, College of Natural and Computational Sciences, Ambo University, Ambo, Ethiopia.

2 Dire-hinchini Distinct administrative office, Western Showa, Ethiopia.


The objective of this study was to assess and evaluate the biogas yield of food wastes generated from the main campus of Ambo University's student cafeteria in a batch anaerobic digestion. Food waste from preprocessing and leftover from the student cafeteria were collected and measured. Standard techniques were used to analyze the physicochemical characteristics of the various food wastes, and the barrier solution was used to assess the amount of biogas and methane produced. The daily, weekly, monthly and yearly generated food wastes were: 1,283.02; 8,883.14; 38, 489.06; 204, 448.78kg respectively and the rate of generation of food waste was 0.37kg/capita/day. The moisture content ranged from 3.4±0.78% to 93.11±0.30%; total solids from 6.9±0.30% to 96.6±0.72%, VS of TS 82.1±0.59% to 98.1±0.75%; OC from 45.6±0.33% to 54.5±0.02%, C:N from 33.8% to 20.03±0.3%. The highest average biogas and percentage of methane were measured from FLM (12500±307.16ml and (81.65±2.58%) respectively while, the lowest average total biogas and percentage of methane were from the FPK (8590.33±260.77ml and (67.15±2.47%) respectively. The findings of this study revealed that the high quantity of food waste that was readily available at the study site and that could potentially be converted into high quantity and high-quality bio-methane which could serve two purposes: producing of bio-fuels and reducing environmental degradation from the open disposal of food waste.


Main Subjects

[1] Owusu and Sarkodie, A. (2016). A review of renewable energy sources, sustainability issues, and climate change mitigation. Cogent Engineering. Vol. 3, pp 1-14.
[2] Achinas, S., Achinas, V., and Euverink, G.  (2017). A Technological Overview of Biogas Production from Bio Waste. Green Chemical Engineering a Review, Vol. 3, No. 3, pp. 299-307.
[3] Panwar, N. L., Kaushik S.C., and Surendra K. (2011). Role of renewable energy sources in environmental protection: A review. Vol. 15, No.3, pp. 1513–1524. 
[4] Hafezi, R. and Alipour, M. (2021). Renewable Energy Sources: Traditional and Modern-Age Technologies. In: Leal Filho, W., Marisa Azul, A., Brandli, L., Lange Salvia, A., Wall, T. (Eds.) Affordable and Clean Energy. Encyclopedia of the UN Sustainable Development Goals. Springer, Cham.
[5] Bumbiere, K., Gancone, A., Pubule, J., Kirsanovs, V, Vasarevicius, S., and  Blumberga, D. (2020),  Ranking of Bioresources for Biogas Production. Environmental and Climate Technologies Vol. 24, No. 1, pp. 368–377.
[6] Gao, X., Tang, X., Zhao, K., Balan, V., and Zhu, Q. (2021).  Biogas Production from Anaerobic Co-Digestion of Spent Mushroom Substrate with Different Livestock Manure. Energies, 14, 570. 10.3390/en14030570.
[7] Herout, M., Malaťák, J., Kučera, L., and Dlabaja, T. (2011). Biogas composition depending on the type of plant biomass used. Res. Agr. Eng. Vol. 57, No. 4: 137–143.
 [8] Nwokolo, N, Mukumba, P., Obileke, K., and Enebe, M.  (2020). Waste to Energy: A Focus on the Impact of Substrate Type in Biogas Production. MDPI Processes 2020, 8, 1224; doi:10.3390/pr8101224.
[9] Joardder, M. and Masud, M. (2019). Causes of Food Waste. In: Food Preservation in Developing Countries: Challenges and Solutions. Springer, Cham
[10] Osman, A.I., Abu-Dahrieh, J.K., McLaren, M., Lafr, F., and Rooney, D.W. (2018). Characterizations of robust combustion catalyst from aluminium foil waste. Chem. Sel. Vol. l.3, pp. 1545–1550.
[11] Chen, H., Osman, A. I., Mangwandi, C. and Rooney, D. (2019). Upcycling food waste digestate for energy and heavy metal remediation applications. Resource. Conservation and Recycling. X 3, 100015.
[12] Capson-Tojo, G. et al. (2016). Food waste valorization via anaerobic processes: A review. Review of Environmental Science and Biotechnology. Vol. 15, pp. 499–547.
[13]. Zhang, C., Su, H., Baeyens, J., and Tan, T. (2014). Reviewing the anaerobic digestion of food waste for biogas production. Renew. Sustain. Energy Review. Vol. 38, pp. 383–392.
[14] Mustafa, M. Y., Calay, R. K., and Román, E (2016). Biogas from organic waste—a case study. Proced. Eng. Vol. 146, pp. 310–317.
[15] Caruso, M., Braghieri, A., Capece, A., Napolitano, F., Romano, P., Galgano , F., Altieri, G., and Genovese, F. (2019). Recent Updates on the Use of Agro-Food Waste for Biogas Production. Applied science-Review, 9, 1217; doi:10.3390/app9061217.
[16] Pappupreethi, S., Muthus, K., Revathi, S. M., and Rizwan, A. (2017). Production of Biogas Using Food Waste from SRIT Hoster.International Journal of Energineering Research and Modern Education.
[17] Ahorsu, R., Francesc, M., and Magda, C. (2018). Significance and Challenges of Biomass as a Suitable Feedstock for Bioenergy and Biochemical Production: A Review. Energy Review, pp. 1-19.
[18] Yonael, M. and Wondwossen, B. (2019). Simulation and Experimental Analysis of Biogas Upgrading. AIMS Energy, Vol.7, No. 3, pp. 371–381.
[19] Horvath, S., Tabatabaei M., Karimi K., and Kumar R. (2016). Recent Updates on Biogas Production: Review Paper. Journal of Biofuel Research, Vol. 10, pp. 394-402.
[20] Ogato, G.S. (2017). quest for mainstreaming climate change adaptation into urban development
platting of Ambo Town, Ethiopia. America Journal of Human Ecology, Vol. 2, No. 3, pp. 103-119.
[21] Mbuligwe, S.E. (2002). Institutional solid waste management practices in developing countries: a case
study of three academic institutions in Tanzania. Resource. Conserve.Recycling. Vol, 35 No.3, 131-146.
[22] Zaman, N. (2010). PhD thesis, University of Canterbury.
[23] Eze, J. and Agbo, K. (2010). Studies on the microbial spectrum in anaerobic bio-methanization of cow dung in 10 m3 fixed dome digester. International Journal Physical Science. Vol. 5, pp. 1331-1337.
[24]]Raghuramulu, N., Madhavan, N., and Kalyanasundaram, S. (2003). A manual of laboratory Techniques.56-58.
[25] Adams, R. C., Maclean, R.C., Dixon, F.M., Bennett, G. I., and Lough, R. C. (1951). The utilization of organic waste in Newzealand. Journal of Engineering, 396-424.
[26] Karthikeyan, S., He, J., Joshi, U. M., and  Balasubramanian, R. (2009). Determination of Total Nitrogen in Environmental Samples: Validation by Comparison of Techniques and Intralaboratory Studies. Analytical Letters, Vol. 42, No. 7, pp. 948–957. 
[27] Morosini C., Conti F., TorrettaV., Rada  E. C. , Passamani G., Schiavon M. , Cioca L. I.,  and Ragazzi M.R. Biochemical methane potential assays to test the biogas production from the anaerobic digestion of sewage sludge and other organic matrices. The Proceedings of the International Conference on Energy Production and Management (EQ 2016) pp235-243.
[28] Helelo, A., Senbeta, A., and Anshebo, S. (2019). Assessment of Solid Waste Management (SWM) Practices in Hawassa University Campuses. Journal of Applied Science and Environmental Management, Vol. 23, No. 6, pp. 1081-1086.
[29] Bhatt, A. H. and Tao, L. (2020). Economic perspectives of biogas production via anaerobic digestion. Bioengineering, Vol. 7, No. 3, 74 doi:10.3390/bioengineering7030074. 
[30] Zhang, J. et al. (2020). Integrating food waste sorting system with anaerobic digestion and gasifcation for hydrogen and methane coproduction. Applied Energy 257,113988.
[31] Massreshaw A.A., 2017. Characterisation Peal of Fruit and Leaf of Vegetable Waste with Cow Dung for Maximizing the Biogas Yield.  International Journal of Energy and Power Engineering. Vol. 6, No. 2, pp. 13-21.
[32] Steffen, R., Szolar, O., and Braun, R. (2000). Feedstock for Anaerobic Digestion. Anaerobic Digestion, making Energy and Solving Modern Waste Problem, AD-Nett report.
[33] Paritosh, K., Sandeep K., Kushwaha, M., Nidhi, P., Aakash, C., and Vivekanand, V. (2017). Food Waste to Energy: An Overview of Sustainable Approaches for Food Waste Management and Nutrient Recycling. BioMed Research International, 19.
[34] Al‑Wahaibi, A., Osman, A., Al‑Muhtaseb, A. H., Alqaisi, O., Baawain, M., Fawzy, S. and Rooney, D. W. (2020). Techno‑economic evaluation of biogas production from food waste via anaerobic digestion. Scientific report. 10:15719. Nature research.