Abstract
A comparative analysis of biogas yield from poultry, cattle and piggery wastes was investigated at the mesophilic temperature (around 32°c). The objective of this work was to compare biogas yield from these livestock wastes and to compare the variation of total solids (TS) with biogas yield from the waste types. Batch type anaerobic digesters were used in these experiments. Each of the waste types was anaerobically digested for a 15-day detention period. Three replicates of 5%, 10%, and 15% TS slurries of the waste types were used in this analysis. Temperature measurement was undertaken at 0600h and 1200H. Daily biogas measurement was accomplished at 1200H by the water displacement method. Results obtained showed that there was no significant difference in biogas yield from the piggery and cattle wastes, but a significant difference in gas yield was observed from poultry waste at p<0.05 using the Duncan’s new multiple range test. Result obtained also showed that as the TS increased from 5% to 15% TS, biogas yield decreased for the waste types.
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