Effects of using P.juliflora leaves as additive in anaerobic digestion of poultry wastes

Abstract

This study explores the influence of P.juliflora leaves as an additive in the anaerobic digestion of poultry droppings from layers and broilers. Six digesters (A, B, C, D, E, and F) were used with a retention time of 31 days. The dry weight content of the digesters include: 100% layer wastes (control), 100% broiler wastes (control), 95% layer wastes + 5% P. juliflora leaves, 90% layer wastes + 10% P. juliflora leaves, 95% broiler wastes + 5% P. juliflora leaves, and 90% broiler wastes + 10% P. juliflora leaves. Layer wastes plus 5% Prosopis Juliflora created 18% more biogas than layer wastes alone, and layer wastes plus 10% Prosopis Juliflora produced 22% more biogas than layer wastes alone, which was the control set-up. In comparison to digester broiler wastes alone, broiler wastes plus 5% and broiler wastes plus 10% both produced 20% and 24% more biogas, respectively. In conclusion, adding 5 and 10 percent of Prosopis Juliflora to poultry manure from layers or broilers has significantly increased the generation of biogas. Broiler wastes plus 10% Prosopis Juliflora yielded the most amount of methane and least amount of hydrogen sulfide, which makes it the most suitable substrate.