This work, on a real scale, aims to characterize and quantify the production of biogas from poultry litter based on Napier grass (CN) and rice husk (CZ) as substrates. The system uses four substrate feed tanks, followed by four anaerobic reactors and a stabilization pond for the effluent. The system has a generator set used in the production of electricity. Poultry litter was analyzed for the chemical determination of the constituents. Samples were collected at the entrance and exit of the biodigester to verify the efficiency of removal of organic matter. Biogas production and consumption were monitored. In this research, a new methodology was used to replace the residue of CN with CZ and feed the biodigestion system without interrupting the process until the complete replacement of one residue with another.The values of N, P, K obtained were, respectively, 2.92, 3.72 and 2.12 g/100 g. The COD removal efficiency in the biodigesters was 51%, representing a load of 79.8 kgDQO/day. The values of CH₄ and CO₂ concentrations in biogas were 52.5 and 47.5%, respectively. The highest energy production occurred in September (9280 kWh/month). In the months of July and September, the highest values of energy demand (around 2000 kWh/month) were perceived, with exhaust fans and fans as the main responsible for energy consumption (48% of the total). The research showed how the use of poultry waste can contribute to reducing the cost of electricity from rural properties, providing economic development and improving the local energy sector.

Graphic abstract

中文翻译：

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巴西亚马逊地区家禽垃圾消化产生的甲烷和电力：一项大规模研究

这项工作的实际规模旨在表征和量化以纳皮尔草（CN）和稻壳（CZ）为底物的家禽垫料产生的沼气。该系统使用四个底物进料罐，然后是四个厌氧反应器和一个用于废水的稳定池。该系统具有用于发电的发电机组。分析了家禽垫料中的化学成分。在生物消化器的入口和出口收集样品，以验证去除有机物的效率。监测沼气的生产和消费。在这项研究中，使用一种新的方法将CN残留物替换为CZ，并在不中断过程的情况下将其送入生物消化系统，直到用另一种残留物完全替代一个残留物。获得的N，P，K值为：分别为2.92、3.72和2.12克/ 100克。生物消化器中的COD去除效率为51％，相当于每天79.8 kgDQO的负荷。CH的值沼气中的₄和CO ₂浓度分别为52.5和47.5％。最高的能源产量发生在9月（9280千瓦时/月）。在7月和9月，能源需求的最高值（约2000 kWh /月）被认为是主要的原因，其中排风扇和风扇是造成能耗的主要因素（占总量的48％）。研究表明，禽肉的使用如何有助于降低农村地区的电力成本，促进经济发展并改善当地能源部门。

图形摘要