African Journal of Environmental Science and Technology
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Article Number - 8D027F361973


Vol.11(1), pp. 71-78 , January 2017
DOI: 10.5897/AJEST2016.2155
ISSN: 1996-0786



Full Length Research Paper

Eggshells – assisted hydrolysis of banana pulp for biogas production



Lazaro Julius Kivuyo
  • Lazaro Julius Kivuyo
  • Department of Materials, Energy Science and Engineering, School of Materials, Energy, Water and Environmental Sciences, Nelson Mandela African Institution of Science and Technology, P.O. Box 447 Arusha, Tanzania.
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Karoli Nicholas Njau
  • Karoli Nicholas Njau
  • Department of Materials, Energy Science and Engineering, School of Materials, Energy, Water and Environmental Sciences, Nelson Mandela African Institution of Science and Technology, P.O. Box 447 Arusha, Tanzania.
  • Google Scholar
Cecil Kithongo King’ondu*
  • Cecil Kithongo King’ondu*
  • Department of Chemistry, South Eastern Kenya University, P. O. Box 170-90200 Kitui – Kenya.
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 Received: 21 June 2016  Accepted: 14 September 2016  Published: 31 January 2017

Copyright © 2017 Author(s) retain the copyright of this article.
This article is published under the terms of the Creative Commons Attribution License 4.0


In this study, pretreatment of banana pulp using eggshells in both calcined and un-calcined forms to examine the extent of hydrolysis was conducted. Reactor CO containing banana pulp and inoculum but with no eggshells added was used as the control, while reactors C1, C2, C3, C4, and C5 containing banana pulp and inoculum were spiked with 1, 3, 5, 7, and 9 g of un-calcined eggshells and calcined eggshells, for experiment 1 and 2, respectively. Anaerobic digestion was carried out at mesophilic temperature (35°C) for a period of 20 days. Digester C3 with 5 g of calcined eggshells gave the largest cumulative biogas yield of 2343 mL with 62% CH4, followed by digester C5 with 9 g of un-calcined eggshells which gave 2032 mL with 51.9% CH4. The least biogas yield of 10 mL was obtained in digester C5 with 9 g of calcined eggshells additive.

Key words: Anaerobic digestion, banana pulp hydrolysis biogas, eggshells.

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APA Kivuyo, L. J., Njau, K. N., & King’ondu, C. K. (2017). Eggshells – assisted hydrolysis of banana pulp for biogas production. African Journal of Environmental Science and Technology , 11(1), 71-78.
Chicago Lazaro Julius Kivuyo, Karoli Nicholas Njau and Cecil Kithongo King’ondu,. "Eggshells – assisted hydrolysis of banana pulp for biogas production." African Journal of Environmental Science and Technology 11, no. 1 (2017): 71-78.
MLA Lazaro Julius Kivuyo, et al. "Eggshells – assisted hydrolysis of banana pulp for biogas production." African Journal of Environmental Science and Technology 11.1 (2017): 71-78.
   
DOI 10.5897/AJEST2016.2155
URL http://academicjournals.org/journal/AJEST/article-abstract/8D027F361973

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