Naidu Geeta M, Raturi Atul, Mani Francis S
Master of Science Programme, School of Information Technology, Engineering, Mathematics and Physics, University of the South Pacific, Suva, Fiji.
School of Information Technology, Engineering, Mathematics and Physics, University of the South Pacific, Suva, Fiji.
Heliyon. 2024 Aug 22;10(17):e36325. doi: 10.1016/j.heliyon.2024.e36325. eCollection 2024 Sep 15.
Although poultry is the largest meat by volume produced in Fiji, 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 study was first conducted with mono-digestion batches of poultry manure, and co-digestions with kitchen waste (KW) and newspaper waste (NPW). Solid state anaerobic digestion (SSAD) was employed in all the batches, and the key operational parameters of AD were studied, along with its influence on biogas production. The pilot study revealed that even slight changes in environmental temperature had the greatest effect on biogas production. The most resilient to the temperature changes were the co-digested feedstocks of KW. Yet, given a substantial AD period, the anaerobes in the mono-digesters were able to eventually acclimatize to the SSAD environment, and produce the overall highest biogas production. The pilot study results were then used to conduct a feasibility study of the full-scale design. The analysis showed that the SSAD system would generate 189.46 MWh of electricity annually, with a levelized cost of energy of FJ$0.17/KWh.
尽管家禽肉是斐济产量最大的肉类，但该国尚未有关于家禽粪便厌氧消化（AD）的既定研究，也未将其应用于家禽粪便处理。本文旨在确定家禽粪便厌氧消化用于为斐济一家家禽养殖场供电的技术经济可行性。首先进行了一项中试规模研究，采用单批家禽粪便厌氧消化，以及与厨余垃圾（KW）和报纸垃圾（NPW）的共消化。所有批次均采用固态厌氧消化（SSAD），研究了厌氧消化的关键操作参数及其对沼气产量的影响。中试研究表明，即使环境温度的微小变化对沼气产量也有最大影响。对温度变化最具弹性的是厨余垃圾的共消化原料。然而，在相当长的厌氧消化周期后，单消化器中的厌氧菌最终能够适应固态厌氧消化环境，并产生总体最高的沼气产量。然后，利用中试研究结果对全规模设计进行可行性研究。分析表明，固态厌氧消化系统每年将产生189.46兆瓦时的电力，平准化能源成本为每千瓦时0.17斐济元。
