Authors : Orkuma J.G.; Samuel, D.A.; Eziefula B.I.; Kantiok D.Y.

Volume/Issue : Volume 10 - 2025, Issue 3 - March

Google Scholar : https://tinyurl.com/ycycdd42

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DOI : https://doi.org/10.38124/ijisrt/25mar2005

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Abstract : The use of amendment of Soymilk Dreg (SMd) substrate to improved biogas yield from Cow Manure (Cm) substrate was investigated and duplicate batch experiments were carried out at 4 g VS/L, in eight 2 L volume polyethylene biodigester, with 1.8 L working volume using 144 mL of inoculum throughout the experiments, for 30 days at a fixed temperature of 33 °C. The substrates were divided to three ratios (Cm: SMd (%)); 2:1(50 %), 3:1(33 %) and 4:1(25 %) and a control with only Cm in biodigesters labelled A, B, C and Control. The results shows that biodigesters A, B and C recorded biogas volumes of 25.96, 23.51 and 18.46 % above the control and the bioCH4 composition of biodigesters A, B and C were 50.48, 47.08 and 40.00 % higher than the control. It was concluded that the presence of SMd provided a balanced substrate composition, supporting a stable methanogenic activity across treatments and higher biogas and bioCH4 yields. It is recommended that 25 % SMd (volatile solid) amendment should be codigested with Cm for optimal biogas production.

Keywords : Anaerobic-Codigestion, Soymilk Dreg Amendment, Cow Manure, Biogas Production.

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