Kefalew Tamiru, Lami Misgana
Madda Walabu University, College of Agriculture and Natural Resources, P.O. Box: 247, Bale-Robe, Ethiopia.
Heliyon. 2021 Oct 30;7(11):e08293. doi: 10.1016/j.heliyon.2021.e08293. eCollection 2021 Nov.
Fossil fuel resources become scarce, and their combustion is a major pollutant in the environment. As a result, scientists are eager to find alternatives to fossil fuels, and biomass could be one of them. One method of turning biomass into biogas is anaerobic digestion (AD). One of the organic waste kinds used to generate biogas is abattoir waste. In developing countries, managing abattoir waste streams is a significant concern. Using these wastes to produce biogas and biofertilizers could help Ethiopia reduce its environmental hazard while also solving energy and fertilizer-related issues. Given that, the researchers in this study intend to investigate the biogas and bio-fertilizer production potential of abattoir waste in Shashemene Municipality Abattoir (SMA), Ethiopia. To this aim, the production potential of biogas, energy, biofertilizer, and Greenhouse gas (GHG) reduction was examined. The study showed about 688,755 kg (kg) per year of slaughterhouse waste is produced from 13,505 cattle, and anaerobic digestion may create approximately 206.63 × 10 m/year of biogas. As a result, it can generate 1,018.98 Kilowatt-hour (kWh)/day and 371,927.7 kWh/year. On an annual basis, the biogas output (206.63 103 m) can replace the 211.8 tons of energy consumed by LPG, kerosene, charcoal, furnace oil, petrol, and diesel. Moreover, the anaerobic digester has the potential to minimize the emission of greenhouse gas (GHG) by 952.4 tons CO eq per year. Furthermore, biogas has the potential to generate 43,184.9 kg of dry bio-fertilizer per year. Therefore, while biogas technology is the long-term solution for ensuring environmental safety and public health, proper disposal was one of the short-term options.
化石燃料资源日益稀缺，且其燃烧是环境中的主要污染物。因此，科学家们急于寻找化石燃料的替代品，生物质可能是其中之一。将生物质转化为沼气的一种方法是厌氧消化（AD）。用于产生沼气的有机废物种类之一是屠宰场废物。在发展中国家，管理屠宰场废物流是一个重大问题。利用这些废物生产沼气和生物肥料有助于埃塞俄比亚减少环境危害，同时解决能源和肥料相关问题。鉴于此，本研究的研究人员打算调查埃塞俄比亚沙舍梅内市屠宰场（SMA）屠宰场废物的沼气和生物肥料生产潜力。为此，研究了沼气、能源、生物肥料的生产潜力以及温室气体（GHG）减排情况。研究表明，13505头牛每年产生约688755千克（kg）的屠宰场废物，厌氧消化每年可产生约206.63×10立方米的沼气。因此，它每天可产生1018.98千瓦时（kWh），每年可产生371927.7千瓦时。每年，沼气产量（206.63×10³立方米）可替代211.8吨液化石油气、煤油、木炭、燃料油、汽油和柴油消耗的能源。此外，厌氧消化池每年有可能将温室气体（GHG）排放量减少952.4吨二氧化碳当量。此外，沼气每年有潜力产生43184.9千克干生物肥料。因此，虽然沼气技术是确保环境安全和公众健康的长期解决方案，但妥善处置是短期选择之一。
