Biogas production as energy source and strategy for managing waste and climate change

• DOI: 10.1007/s42452-020-03973-8
• Publication Date: 2021-01-08T08:03:57Z
• Authors: Aransıola Elizabe...; Momodu Abiodun Su...; Okunade Inioluwa ...; Adepoju Tofunmi D...
• Keywords: Renewable energy; Slurry; Biomedical Engineering; Biogas; Environmental engineering; Organic chemistry; Hydrogen Production; FOS: Medical engineering; 01 natural sciences; 7. Clean energy; Catalytic Carbon Dioxide Hydrogenation; Catalysis; Environmental science; 12. Responsible consumption; Kerosene; Engineering; FOS: Mathematics; Waste-to-Energy; Waste management; FOS: Chemical engineering; 0105 earth and related environmental sciences; Statistics; FOS: Environmental engineering; Building and Construction; Chemical Engineering; 6. Clean water; Waste Treatment; Energy recovery; Chemistry; 13. Climate action; Electrical engineering; Physical Sciences; Biogas Production; Anaerobic Digestion and Biogas Production; Energy (signal processing); Technologies for Biofuel Production from Biomass; Diesel fuel; Mathematics

AbstractThe study presents technical and economic approaches of upscaled laboratory experiment using yard waste (YW) and heterogeneous slurry (HS) to produce heat and power, as a means of bridging the gap between energy production and climate change management strategies. A combination of YW:HS in ratio 2:3 with slurry obtained from a functional digester serving as inoculum was fed into the digester. These were mixed in the ratios of substrates/inoculum/water of 3.5:0.173:6.28 and theoretically upscaled for field-scale biodigesters. The modeled result shows that about 2.5 m3gas is produced per 5-m3-sized digester over a 30-day hydraulic retention time and estimated project life of 20 years. A business model was adopted for cost recovery of the proposed waste-to-energy system and life cycle cost analysis for the production costs of the seven 5-m3digesters. Avoided emissions of CO2from other equivalent energy sources are 4.36 kg, 10.16 kg, 10.37 kg, and 81.32 kg, respectively, for LPG, kerosene, diesel and fuel wood/charcoal. The project is sustainable in for profit, people and planet.