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.

家禽是斐济产量最大的肉类，但考虑到这类牲畜产生的大量废弃物，该国尚未开展任何关于家禽粪便（poultry manure, PM）厌氧消化（anaerobic digestion, AD）的系统性研究或实际应用。本研究旨在评估斐济地区利用家禽粪便厌氧消化为养殖场供电的技术经济可行性。研究采用中试规模的固态厌氧消化（solid-state anaerobic digestion, SSAD）系统，开展家禽粪便单底物消化批次试验，以及与厨余垃圾（kitchen waste, KW）和报纸废弃物（newspaper waste, NPW）的共消化试验。研究测定了厌氧消化的关键运行参数，并分析其对沼气产量的影响，结果表明环境温度变化对沼气产量的影响最为显著。基于上述结果，研究进一步开展了规模化系统设计的可行性分析。结果显示，该固态厌氧消化系统每年可产生189.46兆瓦时（MWh）的电力，平准化能源成本为0.17斐济元（FJ$）/千瓦时（KWh）。