Assessment of biogas production potentials of palm oil mill effluent and cow dung substrates in anaerobic digester
1 Department of Science Laboratory Technology, Akanu Ibiam Federal Polytechnic Unwana, Afikpo Ebonyi State, Nigeria.
2 Department of Biochemistry, Alex Ekwueme Federal University Ndufu-Alike Ikwo, Ebonyi, State, Nigeria.
Research Article
World Journal of Advanced Research and Reviews, 2024, 22(02), 1279-1287
Article DOI: 10.30574/wjarr.2024.22.2.1498
Publication history:
Received on 08 April 2024; revised on 14 May 2024; accepted on 16 May 2024
Abstract:
The biogas production potentials of palm oil mill effluent (POME) and cow manure (CM) substrates were evaluated using anaerobic digester. The first two digesters (D1 and D2) were charged with POME and CM for mono-digestion respectively. However, co-substrates digestion was done in digesters D3 (60/40 % POME-CM), D4 (70/30 % POME-CM), and D5 (80/20 % POME-CM) and all the digestion lasted for 21 days. The biogas yield of the digesters and performance of the digestions were measured by the analysis of moisture content, pH, total suspended solids (TSS), total solids (TS), volatile solid (VS), chemical oxygen demand (COD), biochemical oxygen demand (BOD) and total organic carbon (TOC) using standard analytical methods. The results showed that D4 (70/30 % POME-CM) has the highest biogas yield (1875±0.11 mL) while D2 (100 % CM) gave the lowest biogas yield (443±0.15 mL). The BOD of D3, D4 and D5 were not detected. The concentrations of COD, TS, TSS and TOC showed a significant (p<0.05) decrease in D1, D3, D4 and D5 compared to D2. While D2, D3, D4 and D5 showed a significant (p<0.05) decrease in moisture content compared to D1. However, D1, D3, D4 and D5 showed increasing level of alkalinity compared to acidic level of D2. Therefore, this study suggests that co-substrates anaerobic digestion of palm oil mill effluent and CM are suitable for biogas production.
Keywords:
Biogas; Methane; Anaerobic digestion; Co-digestion; Palm oil mill and Cow manure
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