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Int. J. Mol. Sci. 2009, 10(11), 4805-4815; doi:10.3390/ijms10114805

Two-Stage Fungal Pre-Treatment for Improved Biogas Production from Sisal Leaf Decortication Residues

1
Department of Biochemistry, School of Medicine, University of Nairobi P.O. Box 30197 Nairobi, Kenya
2
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 / Revised: 1 October 2009 / Accepted: 23 October 2009 / Published: 6 November 2009
(This article belongs to the Section Green Chemistry)
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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 two-stage pre-treatment; sisal leaf decortications residue; biological; fungi; lignocellulose; anaerobic digestion
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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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.

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Int. J. Mol. Sci. EISSN 1422-0067 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
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