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Title: Production of Biogas from Cactus (Opuntia Ficus Indica (L.) Mill.) Peel Co-Digestion with Cow Dung
Authors: Teame Gebrekidan
Meseret Chimdessa
Keywords: Biogas, co-digestion, Cow dung, Opuntia ficus-indica, Total solid, Volatile solid
Issue Date: Apr-2014
Publisher: Haramaya University
Abstract: Production of biogas through anaerobic digestion of organic waste materials provides an alternative environmentally friendly renewable energy. In this study, biogas production from co-digestion of the peel of Opuntia ficus-indica with cow dung in five mix ratios was evaluated under mesophilic conditions (38ºC) using batch digester in microbiology laboratory of Haramaya University. In all substrates, TS and VS, organic carbon, percent moisture and pH were measured before and after digestion. The daily biogas production was subsequently measured by water displacement method for 31 days. All measured physico-chemical parameters of each substrate were significantly varied between before and after AD, and also the rate of variation of these parameters between before and after AD was varied between substrates. Gas production was noticed in all of the substrates types from the first day of digestion experiment and went to zero at about 31 days in all substrates. Assessment of cumulative biogas production revealed that substrate in a mix ratio of 75% CD and 25% CP showed the highest production, suggesting this mix ratio of the two substrates is an optimal mix to yield better biogas. Overall results indicate that the biogas yield and VS and TS reduction can be significantly enhanced when CD and CP are co-digested.
Appears in Collections:Biology

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