| dc.creator |
Mtui, Godliving Y. S. |
|
| dc.date |
2016-09-21T14:18:06Z |
|
| dc.date |
2016-09-21T14:18:06Z |
|
| dc.date |
2011-12 |
|
| dc.date.accessioned |
2018-03-27T09:00:47Z |
|
| dc.date.available |
2018-03-27T09:00:47Z |
|
| dc.identifier |
Mtui, G.Y., 2012. Oxalic acid pretreatment, fungal enzymatic saccharification and fermentation of maize residues to ethanol. African Journal of Biotechnology, 11(4), pp.843-851. |
|
| dc.identifier |
org/10.5897/AJB11.3032 |
|
| dc.identifier |
http://hdl.handle.net/20.500.11810/4021 |
|
| dc.identifier.uri |
http://hdl.handle.net/20.500.11810/4021 |
|
| dc.description |
Dilute oxalic acid pretreatment was investigated as a feasible method for conversion of maize residues into sugars and subsequent production of bioethanol. Oxalic acid concentration of 200 mM for samples treated at 160°C for 10 min was found to be the best pretreatment conditions. Cellulases, mainly cellobiohydrolases from Trichoderma reesei, recorded activities of up to 116 U/ml during saccharification of the cellulosic substrates. The optimum saccharification conditions using 0.2% (v/v) enzyme concentrate were the incubation temperature of 45°C for 48 h. Up to 46% (w/w) glucose and 28% (w/w) xylose were obtained from the pretreated maize residues (stalk, leaf, husk and cobs). Furthermore, a native Saccharomyces cerevisiae (strain KB) was able to convert 78% (w/w) of glucose (and other fermentable sugars) to ethanol after 60 h of incubation at 32°C, under stationary culture conditions. The challenges encountered in chemical and biological conversions included incomplete hydrolysis and fermentation due to substrate recalcitrance and the inability of the yeast cells to utilize 5-carbon sugars such as xylose. This study therefore provided baseline research data and information that could be used for more elaborate and scaled-up studies for possible industrial-scale conversion of the readily available crop residues into bioenergy. |
|
| dc.language |
en |
|
| dc.subject |
Bioethanol, cellulases |
|
| dc.subject |
Cellulases |
|
| dc.subject |
Fermentation |
|
| dc.subject |
Hydrolysates |
|
| dc.subject |
Maize residues |
|
| dc.subject |
Oxalic acid |
|
| dc.subject |
Pretreatment |
|
| dc.subject |
Saccharification |
|
| dc.title |
Oxalic Acid Pretreatment, Fungal Enzymatic Saccharification and Fermentation of Maize Residues to Ethanol |
|
| dc.type |
Journal Article, Peer Reviewed |
|