Enhancing Anaerobic Co-Digestion with Locally Sourced Biochar: A Kinetic Analysis of Biogas Production Efficiency
نویسندگان
1 Department of Medicine and Surgery, University of Ibadan, Oyo State, Nigeria
2 Department of Agricultural and Bioresources Engineering, University of Nigeria, Nsukka, Nigeria
3 Department of Electrical Electronics Engineering, University of Ibadan, Nigeria
4 Department of Biotechnology, Chulalongkorn University, Bangkok, Thailand
5 Department of Chemical Engineering, Chukwuemeka Odumegwu Ojukwu University, Anambra, Nigeria
6 Department of Chemical and Polymer Engineering, Lagos State University, Lagos, Nigeria
7 Department of Geography and Planning Science, Ekiti State University, Ado-Ekiti, Nigeria
8 Department of Chemical Engineering, University of Lagos, Lagos, Nigeria
9 Department of Biochemistry, North Carolina A&T University, Greensboro, USA
10 Department of Mining and Mineral Engineering, University of Bamenda, Cameroon
11 Department of Chemistry, Olabisi Onabanjo University, Nigeria
12 Department of Chemical Engineering, University of Benin, Benin City, Nigeria
13 Department of Water Resources & Environmental Engineering, Nigerian Defence Academy, Kaduna, Nigeria
14 Department of Chemical Engineering, Ladoke Akintola University of Technology, Ogbomoso, Nigeria
15 Department of Chemical Engineering, Ladoke Akintola University of Technology, Ogbomoso, Nigeria
16 Department of Bioinformatics, School of Health and Life Sciences, Teesside University, Middlesbrough, United Kingdom
doi
10.48309/pcbr.2024.453684.1351چکیده
In the quest for sustainable waste management, this study investigates the eco-friendly valorization of food waste (FW) and cattle rumen contents (CRC) into valuable resources via anaerobic co-digestion (AcD). The process is enhanced by the addition of locally sourced biochar (LSB), serving as an exogenous additive. The LSB efficacy as a biomass utilization enhancer and adsorbent was assessed, particularly on biogas production efficiency. The AcD was performed in a sealed cylindrical column for 36 days, with the biogas yield quantified through water displacement in an inverted cylinder. The apex of biogas production was recorded on day 16, with a yield of 0.7244 ml/gVS following the addition of 10 g of LSB. The LSB incorporation was associated with a decrease in physicochemical parameters, indicative of its capacity to degrade or adsorb inhibitory substances, thus boosting biogas production. Kinetic modelling was utilized to simulate the digestion process, employing the first-order kinetic model, modified Gompertz model, and the cone model. The modified Gompertz model exhibited the most accurate fit, as demonstrated by the lowest variance (57.33-225.1%) between the actual and predicted methane yields, along with the highest R2 values (0.913-0.976). These results highlight the potential of LSB to act as a stabilizing agent in AcD, thereby enhancing biogas generation from organic waste.
