Two-Stage Anaerobic Digestion of Aerobic Pre-Treated Sisal Leaf Decortications Residues: Hydrolases Activities and Biogas Production Profile

Simple item page
dc.contributor.authorMshandete, Amelia K.
dc.contributor.authorBjörnsson, Lovisa
dc.contributor.authorKivaisi, Amelia K.
dc.contributor.authorRubindamayugi, Mugassa S. T.
dc.contributor.authorMattiasson, Bo
dc.date.accessioned2016-05-17T14:02:22Z
dc.date.available2016-05-17T14:02:22Z
dc.date.issued2008
dc.description.abstractA two-stage system was investigated for anaerobic digestion (AD) of aerobically pre-treated sisal leaf decortication residue (SLDR) with regard to hydrolytic enzymes and biogas production. The system consisted of a solid-bed bioreactor for hydrolysis connected to methanogenic bioreactor packed with sisal fibre decortication residues (SFDR) as biofilm carriers. Some of the enzymes produced by microorganisms to hydrolyse SLDR were found to be pectinase, filter paper cellulase, amylase, - glucosidase, carboxylmethyl cellulase, xylanase and protease. Enzyme activities observed in the acidogenic bioreactor were much higher than those in the methanogenic bioreactor. The hydrolysis and the methanogenic stages were well separated, as indicated by the high carbon dioxide production, high volatile fatty acids (VFAs) concentration and low pH in the acidogenic bioreactor compared with high methane production, low VFAs concentration and above neutral pH in the effluent of the methanogenic bioreactor. Digestion of SLDR gave energy yields of 2.45 kWh/kg volatile solids added in the form of methane. The integrity of the methane filter was maintained throughout the period of operation producing biogas with 51 - 70% methane content. A stable effluent pH showed that the methanogenic bioreactor had good ability to withstand the variations in load and VFAs concentrations that occurred in the two-stage process. In conclusion, the results of this study showed that the two-stage system was suitable for effective stabilization and biomethanation of SLDR.en_US
dc.identifier.citationMshandete, A.M., Björnsson, L., Kivaisi, A.K., Rubindamayugi, M.S.T. and Mattiasson, B., 2008. Two-stage anaerobic digestion of aerobic pre-treated sisal leaf decortications residues: hydrolases activities and biogas production profile. Afr J Biochem Res, 2(11), pp.211-218.en_US
dc.identifier.issn1996-0778
dc.identifier.urihttp://hdl.handle.net/20.500.11810/2124
dc.language.isoenen_US
dc.subjectAnaerobic digestionen_US
dc.subjectTwo-stageen_US
dc.subjectSisal decortications residuesen_US
dc.subjectAerobic pre-treatmenten_US
dc.subjectBiogasen_US
dc.subjectHydrolasesen_US
dc.titleTwo-Stage Anaerobic Digestion of Aerobic Pre-Treated Sisal Leaf Decortications Residues: Hydrolases Activities and Biogas Production Profileen_US
dc.typeJournal Article, Peer Revieweden_US
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Two-stage anaerobic digestion of aerobic pre-treated.pdf
Size:
163.29 KB
Format:
Adobe Portable Document Format
Description:
Full text
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Department of Molecular Biology and Biotechnology