Affordable and Clean Energy (SDG 7), Responsible Consumption and Production (SDG 12)
Biogas generation from alkali delignified groundnut shell and sugarcane bagasse Monsurat Shittu 1 , Cosmos Elinge 2* 1 Ladoke Akintola University of Technology, Ogbomoso, Oyo State, Nigeria, Kebbi State 2 University of Science and Technology, Aliero, Kebbi State, Nigeria E-mail: moshittu21@lautech.edu.ng Anaerobic digestion of lignocelluloses biomass offers a promising strategy for bio-methane production and renewable energy conversion. However, the recalcitrant nature of native lignocelluloses materials impedes microbial degradation and reduces bioconversion efficiency. This study investigates the delignification of groundnut shell and sugarcane bagasse using 5% w/v NaOH to disrupt biomass crystallinity and enhance biogas production. To examine both treated and untreated biomass samples, characterization techniques such as FTIR, TGA, lignocellulose composition and proximate analysis, were used. Results demonstrated that NaOH pretreatment efficiently reduced lignin and hemicellulose content while increasing cellulose concentration. Anaerobic digestion experiments demonstrated a much higher generation of biogas from delignified biomass sample with statistically significant difference in methane content compared to untreated biomass samples. Digestates analysis revealed no discernible difference in the amount of Nitrogen, Phosphorus, and Potassium, suggesting the digestates of treated biomass sample as foliar fertilizer for leguminous crops. The study recommends groundnut shell and sugarcane bagasse as practical and affordable substrates for biogas production, particularly when pretreated with sodium hydroxide. Key words: Biomass, Lignocelluloses, Pretreatment, Anaerobic, Digestates.
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