Two-stage fungal pre-treatment for improved biogas production from sisal leaf decortication residues

Sisal leaf decortications residue (SLDR) is amongst the most abundant agro-industrial residues in Tanzania and is a good feedstock for biogas production. Pre-treatment of the residue prior to its anaerobic digestion (AD) was investigated using a two-stage pre-treatment approach with two fungal strai...

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Published inInternational journal of molecular sciences Vol. 10; no. 11; pp. 4805 - 4815
Main Authors Muthangya, Mutemi, Mshandete, Anthony Manoni, Kivaisi, Amelia Kajumulo
Format Journal Article
LanguageEnglish
Published Switzerland MDPI AG 01.11.2009
Molecular Diversity Preservation International (MDPI)
Subjects
Agave - metabolism
anaerobic digestion
Biochemistry
Biofuels
Biogas
biological
Bioreactors
fungi
Fungi - growth & development
Fungi - metabolism
Hypocrea jecorina
Lignin
Lignocellulose
Methane - biosynthesis
Plant Leaves - metabolism
sisal leaf decortications residue
Trichoderma - growth & development
Trichoderma - metabolism
two-stage pre-treatment
Tanzania
biological
anaerobic digestion
sisal leaf decortications residue
two-stage pre-treatment
fungi
lignocellulose
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Summary:Sisal leaf decortications residue (SLDR) is amongst the most abundant agro-industrial residues in Tanzania and is a good feedstock for biogas production. Pre-treatment of the residue prior to its anaerobic digestion (AD) was investigated using a two-stage 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 m(3) CH(4)/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.
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ISSN:1422-0067
1661-6596
1422-0067
DOI:10.3390/ijms10114805