Abstract

LIZARAZO H., SONIA PATRICIA; HURTADO R., GERMÁN GONZALO  and  RODRIGUEZ C., LUIS FELIPE. Technical and economic analysis of the production of bioethanol from potatoes in a laboratory in Boyaca. rev.colomb.cienc.hortic. [online]. 2015, vol.9, n.1, pp.97-111. ISSN 2011-2173.  https://doi.org/10.17584/rcch.2015v9i1.3749.

The present study was designed to determine the overall technical and economic potential for the production of ethanol as an alternative use for the potato varieties Tuquerreña and Parda Pastusa. The results showed an efficiency of 83% in the hydrolysis process as a pretreatment for the fermentation process. It was determined that the combined effect of the concentrations of the a-amylase enzyme and substrate was enhanced by using the values 0.36 mL kg^-1 of substrate and 42.2%, respectively. The concentration of the enzyme amyloglucosidase and the saccharification time did not present any statistical significance, so we recommend using 0.4 mL kg^-1 of substrate and a time of 14 hours. For the production of alcohol, a consumption of reducing sugars of 91% was required, resulting in a density of 1.014 g cm^-3 as obtained from ethanol at 20°C with a purity of 94%. This research process showed a consumption of reducing sugars of 41.6% for the substrate of the Parda Pastusa variety and 75% for the substrate of the Tuquerreña variety, which had a direct effect on the production of alcohol, which reached 8.51% v/v, more than in the industrial process, with a value of between 7% and 8% v/v. The economic analysis was performed on three scenarios of investment, highlighting the raw material as the most expensive cost for producing ethanol.

Keywords : starch; physicochemical properties; hydrolysis; ethanol.

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