Electricity generation in Ghana: Evaluation of crop residues and the associated greenhouse gas mitigation potential

文献类型： 外文期刊

第一作者： Seglah, Patience Afi

作者： Seglah, Patience Afi;Gao, Chunyu;Bi, Yuyun;Wang, Yajing;Neglo, Komikouma Apelike Wobuibe;Wang, Hongyan;Cudjoe, Dan;Kemausuor, Francis

作者机构：

关键词： Crop residues; Greenhouse gas emissions; Bioenergy; Electricity generation; Carbon footprint

期刊名称：JOURNAL OF CLEANER PRODUCTION （ 影响因子：11.1； 五年影响因子：11.0 ）

ISSN： 0959-6526

年卷期： 2023 年 395 卷

页码：

收录情况： SCI

摘要： Biomass plays a dual role as an energy source and a solution for climate change mitigation. There are com-plexities surrounding decentralized electricity generation, and Ghana could not achieve its 10% renewable en-ergy target in 2020. The paper assesses the greenhouse gas mitigation potential and economic impact of electricity from major food crop residues subjected to anaerobic digestion technology in 16 regions and 88 districts in Ghana from 2017 to 2020. Buswell equation was applied to calculate the biogas and methane yield. The environmental impact assessment was expressed as global warming potential, and the economic feasibility was conducted. The results showed that crop residues' annual theoretical and technical potential was 28.92 Mt and 17.24 Mt. The top four residues with the largest share of technical potential were maize (5.41 Mt), yam (3.58 Mt), plantain (3.05 Mt) and cassava (2.39 Mt). Biogas and electricity potentials were 1,912.74 Mm3 and 3,068.34 GWh, which could offset 15.56% of electricity consumption in Ghana. The Ashanti (478.18 GWh), Eastern (430.20 GWh), Bono East (318.29 GWh) and Northern (314 GWh) regions demonstrated the highest electricity potential. Ghana could generate the highest electricity potential of 46.52 GWh in the districts and a minimum potential of 0.89 GWh annually. Power generation potential from anaerobic digestion had a diesel displacement capacity of 923.35 x 106 L with a GHG emissions reduction of 2,507.35 kt CO2 eq. The largest GHG reduction potential was 38.15 kt CO2 eq at the district level. The findings show that the project is economically viable, with an average net present value of $ 10,105,904 per region and an electricity cost of $ 0.0321/kWh. The study provides critical insights to policymakers and industry developers for decentralized biomass-based elec-tricity generation in Ghana.

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