Efficiency of a modified plastic tank as a bio-degradation system in Sub-Saharan African countries

Chibuzo Stanley Nwankwo, Chigozie Francis Okoyeuzu and Ikpeama Ahamefula
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Chibuzo Stanley Nwankwo: Department of Food Science and Technology, Collage of Food Technology and Human Ecology, Federal University of Agriculture, Makurdi, Nigeria
Chigozie Francis Okoyeuzu: Department of Food Science and Technology, Faculty of Agriculture, University of Nigeria, Nsukka, Nigeria
Ikpeama Ahamefula: National Root Crops Research Institute, Umudike, Nigeria

Research in Agricultural Engineering, 2020, vol. 66, issue 3, 89-96

Abstract: The efficiency of three modified plastic digesters (3.6 m3 each) using food waste for biogas generation in cooking food was evaluated. The experiment was laid out based on a completely randomised design. A plastic tank was modified as a biodegradation system for food waste digestion to generate a biogas. The biochemical and chemical oxygen demand ranged from 44.58 to 49.62% and 130.42 to 139.20%, respectively, before digestion, but decreased significantly (P < 0.05) after digestion. The pH of the fermenting slurry fluctuated (6.24-6.86) and an average biogas of 0.574 m3 (505-601 L.day-1) per day was generated from the three experimental waste proportions which would be sufficient to cook three meals per day for 3 to 4 people. The methane gas significantly increased (P < 0.05) while the carbon-dioxide significantly decreased (P < 0.05) at the peak of the biogas production. The generated biogas significantly cooked (P < 0.05) faster than kerosene, but not faster than liquefied petroleum gas. The flammable biogas generation and high significant (P <0.05) percentage change in the physico-chemical properties of the wastes after digestion implied high efficiency performance of the digesters modified from the plastic tanks.

Keywords: biodigester; biogas; cassava; cow dung; methane (search for similar items in EconPapers)
Date: 2020
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlrae:v:66:y:2020:i:3:id:21-2020-rae

DOI: 10.17221/21/2020-RAE

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