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Two-Stage Fungal Pre-Treatment for Improved Biogas Production from Sisal Leaf Decortication Residues
Department of Biochemistry, School of Medicine, University of Nairobi P.O. Box 30197 Nairobi, Kenya
Department of Molecular Biology and Biotechnology, College of Natural and Applied Sciences, Uvumbuzi road, University of Dar es Salaam P.O. Box 35179, Dar es Salaam, Tanzania
* Author to whom correspondence should be addressed.
Received: 17 August 2009; in revised form: 1 October 2009 / Accepted: 23 October 2009 / Published: 6 November 2009
Abstract: Sisal leaf decortications residue (SLDR) is amongst the most abundant agroindustrial residues in Tanzania and is a good feedstock for biogas production. Pretreatment of the residue prior to its anaerobic digestion (AD) was investigated using a twostage pre-treatment approach with two fungal strains, CCHT-1 and Trichoderma reesei in succession in anaerobic batch bioreactors. AD of the pre-treated residue with CCTH-1 at 10% (wet weight inoculum/SLDR) inoculum concentration incubated for four days followed by incubation for eight days with 25% (wet weight inoculum/SLDR) of T. reesei gave a methane yield of 0.292 ± 0.04 m3 CH4/kg volatile solids (VS)added. On reversing the pre-treatment succession of the fungal inocula using the same parameters followed by AD, methane yield decreased by about 55%. Generally, an increment in the range of 30–101% in methane yield in comparison to the un-treated SLDR was obtained. The results confirmed the potential of CCHT-1 followed by Trichoderma reesei fungi pre-treatment prior to AD to achieve significant improvement in biogas production from SLDR.
Keywords: two-stage pre-treatment; sisal leaf decortications residue; biological; fungi; lignocellulose; anaerobic digestion
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Muthangya, M.; Manoni Mshandete, A.; Kajumulo Kivaisi, A. Two-Stage Fungal Pre-Treatment for Improved Biogas Production from Sisal Leaf Decortication Residues. Int. J. Mol. Sci. 2009, 10, 4805-4815.
Muthangya M, Manoni Mshandete A, Kajumulo Kivaisi A. Two-Stage Fungal Pre-Treatment for Improved Biogas Production from Sisal Leaf Decortication Residues. International Journal of Molecular Sciences. 2009; 10(11):4805-4815.
Muthangya, Mutemi; Manoni Mshandete, Anthony; Kajumulo Kivaisi, Amelia. 2009. "Two-Stage Fungal Pre-Treatment for Improved Biogas Production from Sisal Leaf Decortication Residues." Int. J. Mol. Sci. 10, no. 11: 4805-4815.