Assessement of Bio-fertilizer Quality of Anaerobic Digestion of Watermelon Peels and Cow Dung
Chemical and Biomolecular Engineering
Volume 2, Issue 3, September 2017, Pages: 135-141
Received: Jan. 14, 2017; Accepted: Jan. 25, 2017; Published: Mar. 10, 2017
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Authors
Dahiru Usman Hassan, Raw Materials Research and Development Council, Federal Ministry of Science and Technology, Abuja, Nigeria
Surajudeen Abdulsalam, Department of Chemical Engineering, Faculty of Engineering and Engineering Technology, Abubakar Tafawa Balewa University, Bauchi, Nigeria
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Abstract
A study was carried out for assessement of bio-fertilizerquality of anaerobic digestion of watermelon peels and cow dung as substrates. Five kilogram (5 kg) each of water melon peels and cow dung were collected, pre-treated and mixed with water in a ratio 1:1 w/v to prepared 18 L slurry that was charged into the batch bio-digester and digested for 35 days at mesophilic temperature of between 26.2-30.8℃. The physicochemical and microbiological analyses of the substrates were determined before and after the digestion process using standard methods. The analyses showed that biochemical oxygen demand, total solids, organic carbon, carbon/nitrogen ratio reduced by 99.84%, 6.22%, 59.32% and 77.25% respectively, while chemical oxygen demand, total suspended solids and pH increased by 67.16%, 86.01% and 24.14% respectively after digestion. Bio-fertilizer yield of 83.35% and biogas yield of 16.65% were obtained. Plants macronutrients (N,P,K) content were substantially increased in the digestates by 78.57%, 89.09% and 84.62%. The presence of Clostridium (nitrogen fixer bio-fertilizer), Bacillus and Pseudomonas (phosphate solubilizing bio-fertilizers) revealed that the digestate was bio-fertilizer. Moreover, the implication of salmonella in the digestate is a major health concern, it is therefore recommended that further study to check if an extended retention period would ensure the removal of Salmonella.
Keywords
Bio-fertilizer, Biodigester, Anaerobic Digestion, Retention Time, Watermelon Peels, Cow Dung, Salmonella
To cite this article
Dahiru Usman Hassan, Surajudeen Abdulsalam, Assessement of Bio-fertilizer Quality of Anaerobic Digestion of Watermelon Peels and Cow Dung, Chemical and Biomolecular Engineering. Vol. 2, No. 3, 2017, pp. 135-141. doi: 10.11648/j.cbe.20170203.12
Copyright
Copyright © 2017 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
References
[1]
Food and Agricultural Organization. (2008). Global Food Losses and Food Waste: Extent, Causes and Prevention. Retrieved October 2014 from www.fao.org/docrep/.
[2]
Owamah, H. I, Dahunusi, S. O, Oranusi, U. S, Alfa, M. I. (2014). Fertilizer and sanitary quality of digestate bio-fertilizer from co-digestion of food waste and human excreta. International Journal of Waste management, 34 (2014), 747-752.
[3]
Food and Agricultural Organization. (2012). Global information and early warning on food agriculture in Africa-Nigeria. Retrieved October 2014 from www.fao.org/docrep/.
[4]
Ojolo, S. J, Dinrifo, R. R. (2007). Comparative study of biogas production from five substrates. Advance materials resource journal. 18-19: 519-25.
[5]
Alfa, M. I., Adie, D. B., Igboro, S. B., Oranusi, U. S., Dahunsi, S. O., Akali, D. M. (2013). Assessment of bio-fertilizer quality and health implications of anaerobic effluent of cow dung and chicken droppings. Journal of Renewable Energy 63, 681–686.
[6]
Schippers R. R. (2002). African indigenous vegetables, an overview of the cultivated species. (Rev.ed.) on CD-ROM. National Resources International Limited, Aylesford, united kingdom, 2002.
[7]
Karki A. B. (2002), From kitchen waste to biogas: an empirical experience: International Journal of Biogas and natural resources management www.snvworld.org. Assessed on 12/08/2014.
[8]
Omprakash, S., Yasabie. A. (2013). Study of Bio-digester for Fuel and Fertilizer. International Journal of Renewable and Sustainable Energy. Vol. 2, No. 4, 2013, pp 147-152.
[9]
APHA. (2012). Standard Methods for the examination of Water and Waste water, 20th edition, America Public Health Association, Water Works Association/Water environment Federation, Washington DC, USA.
[10]
Tsuneo. (2010). Pictorial atlas of soil for seed fungi: Morphologies of cultural fungi for key to species. Third edition. CRC press.
[11]
Dahunsi, S. O, Oranusi, U. S. Owolabi, J. B. (2015). Biogas generation from Watermelon peels, pineapple peels and food wastes. International conference on African issues (CUD-ICADI): Biotechnology and Bioinformatics track.
[12]
Taylor, N., Wilkie., A. C. (2014). Anaerobic digestion for sustainable development, dairy manure waste management. NRAES-176, p63-72, university of Florida, U.S.
[13]
Smith, K., Grylls, J., Metcalfe, P., Jeffrey, B. and Sinclair, A. (2007). Nutrient Value of digestate from Farm Based Biogas Plants in Scotland. Report for Scottish Executive Environment and Rural Affairs Department - ADA/009/.
[14]
Monnet, F. (2003). An Introduction to Anaerobic Digestion of Organic Waste. Final Report Submitted to Remade, Scotland. Retrived August 2014 from http://www.remade.org.uk/media/9102/.
[15]
Dahunsi, S. O, Oranusi, U. S. (2013). Co-digestion of food waste and human excreta for biogas production. Retrieved July 2015 from http://www.sciencedomain.org./3 (4) 485-499-2013/.
[16]
Shu-Hsien T, Ching-Piao L, Shang-S. Y. (2007). Microbial conversion of food wastes for bio-fertilizer production with thermophilic lipolytic microbes. International Journal of Renewable Energy; 32: 904e15.
[17]
Tamil Nadu Agricultural University, TNAU. (2014). Bio-fertilizer entrepreneurial training manual. Coimbatore, India.
[18]
Tamil Nadu Agricultural University, TNAU. (2008). Bio-fertilizer Entrepreneurial training manual. Coimbatore, India.
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