POULTRY DROPPING BIOGAS

Saleh, A. and AKANDE, F.A. and Adekanye, T. A. (2020) POULTRY DROPPING BIOGAS. Nigerian Journal of Scientific Research, 19 (1). pp. 11-20. ISSN 0794-0319

Text EFFECTS OF STIRRING ON THE PROPERTIES OF POULTRY DROPPING BIOGAS.pdf - Published Version Download (704kB)

Abstract

This study evaluated the effects of stirring on the properties of biogas produced from poultry dropping with respect to the quality and quantity of the biogas produced. A plastic batch-flow floating-drum biogas plant was designed and constructed. Poultry dropping from deep litter mixed with water ratio 1:2 (45 kg: 90 litres dropping-to-water slurry ratio) was used as slurry for the gas production. Proximate analyses of the poultry dropping were carried out to determine its potentials for biogas production. Levels of stirring were zero, once per day and twice daily. Each stirring was five slow rotations of the agitator. Properties of the produced biogas that were determined in the laboratory were methane value, carbon (IV) oxide, H2S, pH value, ash and moisture content while the calculated properties were potential calorific value, average gas yield and carbon/nitrogen ratio. The results of the proximate analyses showed that the poultry dropping has high contents of Carbon (C), Nitrogen (N), volatile solids and pH value indicating its suitability for biogas production. The result also showed that the biogases up to 65% methane, 33.12% CO2 and 2.93% H2S contents. The treatment with once stirring/day produces the highest weight of biogas of 1.55 kg while treatment with twice stirring/day produced the least with 1.06 kg. Similarly, the twice stirring/day gave the least value of methane while once stirring/day gave the highest value of methane. The calculated calorific values ranged between 6.07 and 6.46 kWh/m³. The mean values of C/N ratio before and after gas production were 7.5 and 8.81, respectively. It could, thus, be concluded that stirring had significant effects on the quantity and qualities of biogas from poultry dropping.

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