Biogas potential assessment of animal waste in Macenta prefecture (Republic of Guinea)

Physics

This study focuses on the evaluation of the biogas potential of animal wastes in Macenta Prefecture. The census of the three types of herds living in 14 sub-prefectures and the urban commune of Macenta was carried out, of which: 13386 cattles, 17418 pigs and 20005 laying hens. The assessment of daily waste by type of animal was made .The results were 4.23 kg/day of dung per cow; 2.41 kg/d and 2.21 kg/d of pig slurry respectively in semi-improved and local breeding; 0.013 kg/day of droppings per hen. These values made possible to estimate the daily quantities of waste by type of livestock: cow dung (56622.78 kg), pig manure (40967.38 kg) and chicken manure (260.065 kg). The total daily biogas potential of the waste is therefor of the order of 8969.606 m3, distributed as follows: 6164.427 m3 for cow dung; 2332.117 m3 for pig manure and 473.063 m3 for chicken manure. This potential is distributed by locality and livestock types.

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