Renewable Energy, Volume 141, October 2019,
Agricultural wastes are readily available in farming communities and can be utilised for off-grid electrification as an alternative to diesel generators. This work evaluates for the first time the life cycle environmental sustainability of these small-scale systems in the context of Southeast Asia. Rice and coconut residues are considered for direct combustion and gasification, and livestock manure for anaerobic digestion. Overall, anaerobic digestion is the best option for 14 out of 18 impacts estimated through life cycle assessment. The results also suggest that gasification has up to 12 times lower impacts per kWh than combustion, except for resource depletion. Combustion and gasification have 85% to two times lower impacts than diesel generators, except for eutrophication, ecotoxicity and human toxicity. Depending on the feedstock, global warming potential of anaerobic digestion ranges from being 170% lower to 41% higher than that of the diesel generator. Overall, providing power from residual biomass in small agricultural communities would reduce environmental impacts significantly while improving waste management practices.
Agricultural Robots; Agricultural Waste; Agricultural Wastes; Agriculture; Anaerobic Digestion; Biomass; Biomass Electricity; Biomass Power; Combustion; Developing Countries; Developing World; Diesel Engines; Electric Utilities; Environmental Sustainability; Environmental Technology; Eutrophication; Fertilizers; Gas Generators; Gasification; Global Warming; Global Warming Potential; Life Cycle; Life Cycle Analysis; Life Cycle Assessment (LCA); Management Practice; Off-grid Electrification; Rural Areas; Rural Electrification; Small-scale Systems; Southeast Asia; Sustainability; Sustainable Development; Waste Incineration; Waste Management; Waste Management Practices; Asia