Fermentation of stalk juices from different Nigerian sorghum cultivars to ethanol

Nasidi, Muhammad; Agu, R. C.; Deeni, Yusuf Y.; Walker, Graeme M.

doi:10.2478/bioeth-2013-0003

Cited by 8 publications

(9 citation statements)

References 26 publications

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“…The soil from this site was also more sandy, less silty and slightly more acidic. The SSV2 and KSV8 sorghum crops were harvested when their grains reached the soft‐dough maturity stage in order to maximize extractible juice yield for syrup production, while the grains may be utilized as livestock feed or food . SSV2 sorghum is a short season cultivar; hence, its grains reached soft‐dough maturity at 11 weeks after planting while those of KSV8 grain took 16 weeks from date of planting to reach the soft‐dough maturity stage.…”

Section: Resultsmentioning

confidence: 99%

“…The crops were grown under rain‐fed conditions and with only cow dung application as fertilizer. Thus, SSV2 cultivar was harvested 11 weeks after the planting date, while KSV8 was harvested 16 weeks after planting . The fresh bagasse samples (comprising crushed stalks, leaves, peduncles and panicles) were sun‐dried for 2 days followed by oven drying at 60 °C for 72 h. The dried samples were hammer milled and sieved through 4 mm screen (Retsch, Germany).…”

Section: Methodsmentioning

confidence: 99%

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Utilization of whole sorghum crop residues for bioethanol production

et al. 2016

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Sorghum is the fifth most important cereal worldwide and is a major source of agricultural residues in tropical regions. Bioconversion of whole sorghum crop residues comprising stalks, leaves, peduncles and panicles to ethanol has great potential for improving ethanol yield per sorghum crop cultivated, and for sustainable biofuel production. Effective pretreatment of sorghum lignocellulosic biomass is central to the efficiency of subsequent fermentation to ethanol. Previous studies have focused on the bioconversion of sorghum stalks and/or leaves only to bioethanol, but the current study is the first report dealing with whole crop residues. We specifically focused on the impact of Nigerian sorghum cultivation location and cultivar type on the potential ethanol yield from whole sorghum crop residues. Efficient bioconversion of whole sorghum residues to ethanol provides a sustainable route for utilization of crop residues thereby providing a non-food feedstock for industrial-scale bioethanol production.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Utilization of whole sorghum crop residues for bioethanol production

et al. 2016

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“…Additionally, with the unpredictable future prices of fossil fuels Nasidi et al, 2013) cum the expected increases in the price of fossil fuels (Sielhorst et al, 2008) and the shifting attention to biofuel production (Ohimain, 2013), planting of energy crops will be encouraged thereby resuscitating hopes in farming.…”

Section: Effects On Rural Infrastructure and Populationmentioning

confidence: 99%

Effects of biofuel production on selected local Communities in Nigeria

Balogun¹,

Salami²

2016

J. Pet. Technol. Altern. Fuels

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. Since there are reported activities in biofuel feedstock as well as bio-ethanol and biodiesel productions in some parts of Nigeria, the geographical zones were selected and the production sites defined. The communities around the production sites were sampled with a questionnaire to obtain perceptions of the effects. The perceptions were statistically analyzed to derive the effects for each zone and to check for significant (p<0.05) difference in the effects. Results showed varying effects of biofuel production in and across the zones.

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“…It is cultivated on over 45 million hectares of global farmland with annual production estimated at over 60 million metric tonnes. It is a major source of staple food to over 500 million people in Asia and Africa [4,5]. Sorghum crops show high resistance to a variety of fungal and bacterial diseases but are susceptible to grain smut and mould infestation.…”

Section: Introductionmentioning

confidence: 99%

“…The diversion of starch and sugar biomass for bioethanol production raises serious food security concerns worldwide. The technology for bioconversion of sugary plant juices and starch to ethanol is already well established and is commercially viable [4], whilst ethanol from lignocellulosic feedstocks has only recently progressed from laboratory and pilot scale to commercial plant operations [2].…”

Section: Introductionmentioning

confidence: 99%

Bioconversion of degraded husked sorghum grains to ethanol

Nasidi¹,

Agu²,

Deeni³

et al. 2016

Bioethanol

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Efficient starch saccharification is an essential step towards achieving improved ethanol yields by fermentation. Sorghum grains are important starch sources for bioconversion to ethanol. In the present study, disease degraded (spoilt) husked grains from Nigerian sorghum cultivars were obtained from field sites and subjected to bioprocessing to ethanol. The crude husked grains (comprising husks, spikelet, awn, rachis and pubescence materials) were hammer milled and each meal separately mashed with enzyme cocktails comprising amylase, glucanase and protease enzymes. The saccharified worts obtained were then fermented with the yeasts, Saccharomyces cerevisiae and Pichia stipitis (aka Scheffersomyces stipitis), without exogenous nutrient supplementation. Sugars liberated during mashing were determined and it was found that enzymatic hydrolysis of milled sorghum grains was effective in yielding favourable levels of fermentable sugars up to 70g sugar/100g substrate with one particular cultivar (KSV8). Ethanol and carbon dioxide production was measured from subsequent trial fermentations of the sorghum mash and it was found that S. cerevisiae produced ethanol levels equating to 420 L/t that compares very favourably with yields from wheat and barley. Our findings show that crude degraded sorghum grains represent favourable low-cost feedstocks for bioconversion to ethanol with reduced energy input and without additional costs for nutrient supplementation during fermentation. Consequently, our results suggest some economic benefits could be derived from spoilt or degraded sorghum grains.

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Fermentation of stalk juices from different Nigerian sorghum cultivars to ethanol

Cited by 8 publications

References 26 publications

Utilization of whole sorghum crop residues for bioethanol production

Utilization of whole sorghum crop residues for bioethanol production

Effects of biofuel production on selected local Communities in Nigeria

Bioconversion of degraded husked sorghum grains to ethanol

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