Optimization of media components and fermentation conditions for citric acid production from sweet potato peel starch hydrolysate by Aspergillus niger

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dc.contributor.authorAboyeji OO
dc.contributor.authorOloke JK
dc.contributor.authorArinkoola AO
dc.contributor.authorOke MA
dc.contributor.authorIshola MM
dc.date.accessioned2022-07-27T19:26:30Z
dc.date.available2022-07-27T19:26:30Z
dc.date.issued2020
dc.descriptionScientific African
dc.description.abstractThis study investigated sweet potato peel waste as the main carbon source and determine the effect of media components and operating conditions on citric acid (CA) production by Aspergillus niger under submerged fermentation. The sweet potato peel waste is of low-cost readily-available and serve as hydrolysate for CA production. Two sets of experiments were performed using experimental design technique. The first set was designed using a low resolution 2-level factorial which was deployed for parameter screening. The other set of experiments was designed using 3-level design algorithm and was deployed for model development and optimization. The results from parameter screening showed that carbon source (CS), nitrogen concentration (NC), fermentation time (FT) and pH were the “heavy hitters” with significant impact on CA production. The developed model is predictive (R2 = 0.948) with optimum CA (3.22 mg/mL) obtained at CS (97.25%), NC (1.25%w/v), FT (7 days), and pH (6.5). This setting was validated experimentally and resulted in CA yield of 4.36 ± 006 mg/ml, representing a 135%-fold increase over the predicted yield. The present investigation shows that sweet potato peels hydrolysate is a viable and sustainable substrate for CA production.
dc.identifier.citation10.1016/j.sciaf.2020.e00554
dc.identifier.issn2468-2276
dc.identifier.urihttps://nerd.ethesis.ng/handle/123456789/422
dc.language.isoen
dc.subjectAspergillus niger
dc.subjectCitric acid
dc.subjectOptimization
dc.subjectSubmerged fermentation
dc.subjectSweet potato peel
dc.subjectHydrolysate
dc.titleOptimization of media components and fermentation conditions for citric acid production from sweet potato peel starch hydrolysate by Aspergillus niger
dc.typeArticle
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