Assessment of the characteristics and potentials of the selected agro-wastes in biogas production in Nigeria.
| dc.contributor.author | OGUNMODEDE, Oluwatosin Ezra. | |
| dc.date.accessioned | 2025-11-27T14:02:50Z | |
| dc.date.available | 2025-11-27T14:02:50Z | |
| dc.date.issued | 2022 | |
| dc.description | xvii, 79p | |
| dc.description.abstract | This study determined the rate of biogas production from poultry dropping, swine dung, cassava and banana peels singly and in combination. It also determined the chemical properties of the selected agro-wastes and their conversion to biogas energy. The study further evaluated the quality of biogas produced from those sources. These were with a view to providing information on the potential of those agro-wastes in biogas production in Nigeria. The study was carried out using randomized complete block design. The wastes were taken to the laboratory to determine the chemical properties before mixing into the digesters. Cow dung inoculum was used to introduce biocatalysts called methanogens into the entire treatment, singly and in combination to hasten initial biogas production. The mass of all the wastes treatment singly and in combination was measured using a weighing balance and mixed thoroughly with water until all the lumps were broken, the product (i.e. slurry) was poured into the digesters with the aid of a funnel through the inlet, keeping the outlet and the gas collection pipe closed. The digesters were filled to 75% capacity and the remaining space was left for gas collection. Six treatment groups were used in this study namely; Swine Dung (SD), Poultry Dropping (PD), Cassava Peel (CP),Banana Peel = (BP), Swine Dung + Cassava Peel (SD+CP) and Poultry Dropping + Banana Peel (PD+BP) and each was replicated thrice for a period 30 days retention time. The gas yield was measured using water displacement method, and temperature was recorded daily while pH was recorded on weekly basis. Quality of the biogas produced in term of methane composition was determined by absorption of CO2 component with NaOH in air-tight serum bottle. Data collected was subjected to one-way analysis of variance. The chemical properties of substrates produced before and after biogas production showed that significant difference (p <0.05) existed between the pH values of the six substrates, indicating that variation in pH was largely due to differences in substrate composition. Cassava wastes had the highest total solid content (95.07%) and banana wastes had the least (16.21%). Similarly, cassava wastes had the highest volatile solids content (8.16%) while banana wastes had the least (2.37%) before biogas production. In contrast, cassava had the least moisture content (4.90%) while banana had the highest (83.40%) before and after biogas production. The results also showed that for most set-ups, the biogas production was optimal within the first ten days while it continued to decrease afterwards. Upon comparison, the co-digestion of cassava and swine had the highest biogas production in term of quantity as a result of the amount of water displaced (8.33 L/kg/VS) on the2nd day of set-up. The swine substrate gave the highest biomethane of 57.21% while cassava substrate had the least, 31.10 % value. The study concluded that swine substrate had the highest quality in term of methane composition and the co-digestion of SD+CP gave highest quantity of biogas. | |
| dc.identifier.citation | OGUNMODEDE,O.E. (2022)Assessment of the characteristics and potentials of the selected agro-wastes in biogas production in Nigeria. Institute of Ecology and Environmental studies, Faculty of Science. | |
| dc.identifier.other | ror.org/04snhqa82 | |
| dc.identifier.uri | https://ir.oauife.edu.ng/handle/123456789/7141 | |
| dc.language.iso | en | |
| dc.publisher | Institute of Ecology and Environmental studies, Faculty of Science. | |
| dc.title | Assessment of the characteristics and potentials of the selected agro-wastes in biogas production in Nigeria. | |
| dc.type | Thesis |