The potential of sweet potato biorefinery and development of alternative uses

Abstract

The bioethanol production from the sweet potato variety BRS Cuia using three different strains of Saccharomyces cerevisiae (LPB1-93, ATCC-26602, and CA-11) was carried out in this research. Comparative analyses of consumed sugar, ethanol yield, and productivity (in tons per hectare) increased along with the concentration of cells in the inoculum. Additionally, to verify the aromatic quality of a potential sweet potato distilled spirit, volatile organic compounds were analyzed. The results showed a yield of over 90% ethanol. It was observed that the sugar consumption and ethanol production rates can be increased with a higher initial concentration of cells. This resulted in higher concentrations of ethanol in shorter times. From 100 g of the sweet potato variety BRS Cuia, the highest concentration of ethanol obtained was 25.74 g L−1 using the LPB1-93 strain. The estimated bioethanol production is about 10,000 L ha−1, with two sweet potatoes crops in a year. The ethanol production from the sweet potato variety BRS Cuia is viable, representing a sustainable alternative to fuel bioethanol, as well as an alcoholic beverage due to the volatile organic compounds present in the distilled fraction.

COMPARACIÓN DE CLONES MEJORADOS DE CAMOTE (Ipomoea batatas [L.] Lam) EN EL RENDIMIENTO Y CONTENIDO DE BIOETANOL DE RAÍCES RESERVANTES

“…El segundo procedimiento fue la producción de bioetanol, para el cual se procedió con la metodología usada por Rizzolo et al (2021). Se seleccionó las muestras y seguido se mezcló 750 mL de H2SO4 en 0.25 M. La hidrólisis de las muestras se realizó en la autoclave a una temperatura de 121°C durante 15 min (etapa) usando una solución diluida de ácido clorhídrico al 1.5% (v/v).…”

“…Estos resultados indican que los factores ambientales de las épocas permiten que los clones expresen su máximo potencial logrando una alta producción de etanol (Swain et al, 2013). Los resultados de este estudio se aproximan a lo encontrado por Rizzolo et al (2021) quienes analizando y evaluando el camote con mayor potencial para la producción de etanol, encontraron que la variedad boniato fresco BRS Cuia obtuvo mayor producción de bioetanol con 25.74 g L -1 de etanol y con una producción estimada de bioetanol de unos 10000 L ha -1 en dos cosechas de la variedad en un año. Además, señala que el almidón del camote es una alternativa sostenible en la producción de bioetanol para combustible y como una bebida alcohólica.…”

“…Teniendo en cuenta que la producción de bioetanol es una alternativa respetuosa con el medio ambiente y satisface la demanda actual de las biorrefinerías que continuamente buscan fuentes de energía renovable que se transforman mediante procesos físicos, químicos y biológicos (Rizzolo et al, 2021;).…”

Determination of Effectiveness and Efficiency of Production Factors in Sweet Potato Farming in Lamongan, Indonesia

“…This plant is consistent in developing the surrounding economy to improve the sustainability of small and medium dairy farms [7]. The ethanol production from a sweet potato for alternative uses exhibits commercial potential, which has not yet been fully explored [8]. Starch from sweet potatoes, pH, and FeSO4 concentrations affect bio-hydrogen production [9].…”

Research Article Evaluation of extraction methods for obtaining high-quality RNA from sweet potato

“…Sweet potato is an important crop that is cultivated in several countries, since its tuberous roots are an excellent source of carbohydrates, vitamins, and minerals (Pessu et al, 2020), in addition to being used in the production of nutraceuticals (Zhang et al, 2017) and bioethanol (Rizzolo et al, 2021). More than 91 million tons of sweet potato is produced worldwide, with China, the world's largest sweet potato producer, being responsible for 57 % of this total (FAO, 2021).…”