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Journal of EnergyVolume 2013 2013, Article ID 350731, 7 pages

Research ArticleApplied and Environmental Biotechnology Laboratory, Department of Biological Sciences, Birla Institute of Technology and Science, Pilani, K. K. Birla Goa Campus, Goa 403726, India

Received 13 February 2013; Revised 26 April 2013; Accepted 17 May 2013

Academic Editor: Guohe Huang

Copyright © 2013 Vidhya Prabhudessai et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The focus of our work is on anaerobic digestion of locally available agro wastes like coconut oil cake, cashew apple waste, and grass from lawn cuttings. The most productive agro waste, in terms of methane yield, was coconut oil cake and grass. The results showed that the initial volatile solids concentration significantly affected the biogas production. The methane yield from coconut oil cake was found to be 383 ml CH4-g VS and 277 ml CH4-g VS added at 4 and 4.5 g VS-l. In case of grass the biogas production increased with increasing VS concentrations with methane yield of 199, 250, 256, 284, and 332 ml CH4-g VS at 3, 3.5, 4, 4.5, and 5.0 g VS-l. For cashew apple waste single-stage fermentation inhibited biogas production. However, phase separation showed methane yield of 60.7 ml CH4-g VS and 64.6 ml CH4-g VS at 3.5 and 4.0 g VS-l, respectively. The anaerobic biodegradability of coconut oil cake was evaluated in fed batch mode in a 5 L anaerobic reactor at 4 g VS-L per batch, and the maximum methane yield was found to be 320 ml CH4-g VS.

Autor: Vidhya Prabhudessai, Anasuya Ganguly, and Srikanth Mutnuri



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