Abstract Intensification and mechanization of agricultural activities have brought numerous benefits, among which, is the increase in food production. However, waste generation from animal has also increased tremendously. Creation of laying hens in cage system produces many wastes, which must be removed daily. This is important for the cage and farm environmental protection; which should be properly managed to ensure public health protection. In the pursuit for effective management, by using experimental data of a chicken farm in Itanhandu-MG, Brazil, the possible production at national level, of electric energy by anaerobic digesters from dejections collected in laying hens cages. In the present study, the GHG emissions impacts assessment, by tCO2eq, in the COP21 from Paris 2015 context was evaluated using the Intergovernmental Panel on Climate Change (IPCC) methodology. For the economic viability of these wastes in energy generation, six scenarios of ten years were evaluated, all resulting from the combination between scenarios with and without funding, and with or without internal use of electrical power generated, but with real and presumed profit (in the framework of ANEEL no. 482/2012 and no.687/2015 resolutions) on micro-generation distribution. In all scenarios, energy was considered available to the Brazilian National Interconnected System (SIN), according to the 5th auction average price in 2015. The annual emissions avoided by methane burning and subsequent electricity generated was of 8.02 million of tCO2eq and 38.4 thousands of tCO2eq, respectively. Farms with more than 100,000 birds presented good probability in simulations of certainty, with regards to expected financial return. The most promising scenario was C6, tax modality of presumed profit, internal energy use, and sale of surplus energy (it would be also considered as credit on the next account), with financing of invested capital.

中文翻译：

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巴西姿势鸟舍发电潜力避免的温室气体排放和经济分析

摘要 农业活动的集约化和机械化带来了许多好处，其中包括粮食产量的增加。然而，动物产生的废物也大大增加。在笼养系统中饲养蛋鸡会产生许多废物，必须每天清除。这对网箱和农场环境保护很重要；应妥善管理，以确保公众健康。为了寻求有效管理，通过使用巴西伊坦汉杜-MG 一家养鸡场的实验数据，利用厌氧消化器从蛋鸡笼中收集的粪便中可能产生的电能在国家层面上的生产。在本研究中，温室气体排放影响评估，按 tCO2eq，在 2015 年巴黎的 COP21 背景下，使用政府间气候变化专门委员会 (IPCC) 方法进行了评估。对于这些废物在能源生产中的经济可行性，评估了 10 年的六个情景，所有情景都来自有和没有资金、有或没有内部使用发电的情景之间的组合，但具有实际和假定的利润（在ANEEL 第 482/2012 号和第 687/2015 号决议）关于微发电分配的框架。根据 2015 年第 5 次拍卖的平均价格，在所有情景中，巴西国家互联系统 (SIN) 均认为能源可用。 甲烷燃烧和随后发电所避免的年排放量为 802 万吨二氧化碳当量和 3.84 万吨二氧化碳当量， 分别。拥有 100 多个农场，在预期财务回报方面，000 只鸟在确定性模拟中表现出良好的概率。最有希望的情景是 C6，假定利润的税收模式、内部能源使用和剩余能源的销售（它也将被视为下一个账户的信贷），以及投资资本的融资。