Anaerobic digestion of poultry manure to power a poultry farm in Ba: Techno-economic study

Poultry is the largest meat volume produced in Fiji, yet considering the large quantity of waste produced by this livestock, there has not been any established study nor application of the anaerobic digestion (AD) of poultry manure (PM) in the country. This paper aims to determine the techno-economic feasibility of the AD of PM to power a poultry farm in Fiji. A pilot-scale, solid-state anaerobic digestion (SSAD) was employed with mono-digestion batches of PM, and co-digestions with kitchen waste (KW) and newspaper waste (NPW). The key operational parameters of AD were measured and its influence on the biogas production were studied, whereby changes in environmental temperature had the greatest effect on biogas production. The results were then used to carry out a feasibility study of the full-scale design. The results showed that the SSAD system would generate 189.46 MWh of electricity annually, with a levelized cost of energy of FJ$0.17/KWh.