A Simple Equation for Total Reducing Sugars (Trs) Estimation on Sweet Potato and Ethanol Yield Potential

Schweinberger, Cristiane Martins; Trierweiler, Jorge Otávio; Trierweiler, Jorge O.

doi:10.1590/0104-6632.20190361s20170404

Cited by 12 publications

(7 citation statements)

References 15 publications

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“…The total sugar content of the sweet potato used was 26.93±0.86%, and the experimental cultivation yield was 93.91% (Schweinberger et al, 2019a;Weber et al, 2020b). Hence, for the economic evaluation, a sweet potato with 30% of total sugar was assumed as a reference, and yields of 95% were assumed for both fermentation and distillation processes.…”

Section: Resultsmentioning

confidence: 99%

“…The sweet potato used for ethanol production is the cultivar with light yellow peel and pulp. Rotting sweet potatoes were obtained in local fairs (Schweinberger et al, 2019a).…”

Section: Methodsmentioning

confidence: 99%

“…For tubers, the global quantitative food wastage is 45%/year (Food and Agriculture Organization of the United Nations, 2019), totaling an annual waste of circa 350,000 tons of sweet potato in Brazil. Prior studies in our research group (GIMSCOP) have developed and enhanced the process of ethanol production from sweet potato waste (Masiero et al, 2014;Risso, 2014;Schweinberger et al, 2019a;Schweinberger et al, 2016). The production of bioethanol from biowaste contributes to reducing greenhouse emissions.…”

Section: Introductionmentioning

confidence: 99%

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A circular economy model for ethanol and alcohol-based hand sanitizer from sweet potato waste in the context of COVID-19

Weber

Ranzan

Liesegang

et al. 2020

BJO&PM

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Goal: The goal of the present work is to analyze the techno-economic viability of a biorefinery to generate ethanol and alcohol-based hand sanitizer from sweet potato waste within the concept of a circular economy. Design / Methodology / Approach: A survey of expenses for a 1000 L.day-1 distilled plant was carried out, and five different market scenarios were evaluated, varying the rate of production of each product. Results: Results show that the higher the production of the hand sanitizer, the more lucrative the scenarios are. The economic breakeven point occurs when the percentage of the alcohol-based hand sanitizer production is equal to 34%. However, the project becomes economically attractive from the production rate of 39%. The scenario for 80% of alcohol-based hand sanitizer production resulted in NPV of US$ 913,140.92, IRR of 64%, with a discounted payback of 0.72 year. Limitations of the investigation: It was considered that all the production was sold, which is in line with the current market demand. However, if the market slows down, the sales and the revenue obtained may be lower. Practical implications: The production of hand sanitizer from sweet potato waste is an opportunity to meet the market needs in scenarios such as the COVID-19 pandemic. Besides, the proposed biorefinery promotes the development of the circular economy through waste minimization. Originality / Value: No studies about the production of ethanol and alcohol-based hand sanitizer from sweet potato waste in an integrated way and the simulation of different real market scenarios were found.

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Section: Resultsmentioning

confidence: 99%

“…The sweet potato used for ethanol production is the cultivar with light yellow peel and pulp. Rotting sweet potatoes were obtained in local fairs (Schweinberger et al, 2019a).…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A circular economy model for ethanol and alcohol-based hand sanitizer from sweet potato waste in the context of COVID-19

Weber

Ranzan

Liesegang

et al. 2020

BJO&PM

Self Cite

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“…The higher the conversion is, the higher the alcohol yield with lower cost will be, considering there is no need of large amounts of hydrolytic enzymes such as amylases and glucosidases. Schweinberger et al (2019) observed that drier sweet potatoes result in higher ethanol potentials and they made an equation to estimate total reducing sugars based on their moisture content. Results showed that ethanol potential increases non-linearly with increasing concentrations of sweet potato mash in the fermenting medium.…”

Section: Resultsmentioning

confidence: 99%

Produção de álcool de batata-doce variando as condições de fermentação e hidrólise

Santos

Guerra

Resende

et al. 2020

RSD

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Bioethanol is a renewable fuel as an alternative source of energy of worldwide importance.The present study aimed to evaluate alcohol production from sweet potato, under varying reaction conditions for fermentation and hydrolysis. A genotype was selected to obtain dried flour and processed by acid hydrolysis and enzymatic hydrolysis with α-amilase and amiloglucosidase. The experiment was carried out in a completely randomized block design Research, Society and Development, v. 9, n. 2, e168922201, 2020 (CC BY 4.0) | ISSN 2525-3409 | DOI: http://dx.doi.org/10.33448/rsd-v9i2.2201 2 with three central point replicates combined with response surface methodology. The variables were pH, temperature and fermentation time. The alcohol content was determined by distillation with subsequent spectrophotometric analysis. Raw materials were characterized according to moisture, reducing sugars and starch, and 4.13%, 4.04% and 71.80% were obtained, respectively. Acid hydrolysis showed higher alcohol percentages of distilled samples. The highest values for acid hydrolysis and enzymatic hydrolysis in fermentations were 26.42% and 25.04%, respectively, carried out at pH 5.0 and 36°C for 5 days. The fermentation time was the most important variable, with higher and significant values for both types of hydrolysis. Acid hydrolysis presented higher potential for alcoholic production than enzymatic hydrolysis in sweet potato fermentation. ResumoO bioetanol é um combustível renovável como fonte alternativa de energia de importância mundial. O presente estudo teve como objetivo avaliar a produção de álcool a partir de batatadoce, sob diferentes condições de reação para fermentação e hidrólise. Um genótipo foi selecionado para obtenção de farinha seca e processado por hidrólise ácida e hidrólise enzimática com α-amilase e amiloglucosidase. O experimento foi realizado em delineamento de blocos completamente casualizados com três repetições de pontos centrais, combinadas com a metodologia da superfície de resposta. As variáveis foram pH, temperatura e tempo de fermentação. O teor de álcool foi determinado por destilação com subsequente análise espectrofotométrica. As matérias-primas foram caracterizadas quanto à umidade, açúcares redutores e amido, obtendo-se 4,13%, 4,04% e 71,80%, respectivamente. A hidrólise ácida mostrou maiores porcentagens de álcool nas amostras destiladas. Os maiores valores de hidrólise ácida e hidrólise enzimática nas fermentações foram 26,42% e 25,04%, respectivamente, realizados a pH 5,0 e 36 ° C por 5 dias. O tempo de fermentação foi a variável mais importante, com valores mais altos e significativos para os dois tipos de hidrólise. A hidrólise ácida apresentou maior potencial de produção alcoólica do que a hidrólise enzimática na fermentação da batata-doce.Palavras-chave: Ipomoea batatas L.; Saccharomyces cerevisiae; Hidrólise; Bioetanol. ResumenEl bioetanol es un combustible como fuente alternativa de energía de importancia mundial. El presente estudio tuvo como objetivo evaluar la producción de alcohol a parti...

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“…The theoretical potential for ethanol production was calculated using Equation (1): This is an equation proposed by GIMSCOP in a previous study (Schweinberger et al, 2019b), where ethanol concentration (x et,theor ) is calculated as a function of sweet potato moisture (x m_swp , in kg/kg) and amount of potato added (x swp ). The x c_swp value is the proportion of sweet potato (kg) to the added volume of dilution water, so it means x swp (kg)/1 L of dilution water.…”

Section: Ethanol and Distilled Beverage Production Processmentioning

confidence: 99%

Food waste biorefinery advocating circular economy: Bioethanol and distilled beverage from sweet potato

Weber

Trierweiler

2020

Journal of Cleaner Production

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The exponential growth rate of the global population has been causing a threat to finite resources and also increasing the amount of waste generated. The global quantitative food waste for tubers is 45% per year, which in Brazil would amount to 350,000 tons of sweet potato wasted annually. Food waste causes 10% of the emissions of greenhouse gases. In this work, food waste biorefineries are the proposed solution. Integrated processing via a combination of different technologies to produce both ethanol and distilled beverage was evaluated to valorize sweet potato waste profitably within the circular economy concept. No works concerning the integrated production of both products simulating different real market scenarios were found. Five different scenarios varying the production percentage of each product were evaluated. The higher the production of the distilled beverage, the more profitable the scenarios are. Economic results began to be positive when the production for sale of each product reaches 40%, plus 20% of ethanol for domestic consumption. The scenario with 80% of beverage production presented NPV of US$ 1,078,500.18, IRR of 51%, and discounted payback of 1.06 years. The sweet potato waste biorefinery is a sustainable model and contributes to the development of the agriculture and food sector by providing new businesses and consequent job creation. It also leads to the reduction of greenhouse emissions by producing renewable resources and marketable products, thus reaching the goals of the circular economy.

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A Simple Equation for Total Reducing Sugars (Trs) Estimation on Sweet Potato and Ethanol Yield Potential

Cited by 12 publications

References 15 publications

A circular economy model for ethanol and alcohol-based hand sanitizer from sweet potato waste in the context of COVID-19

A circular economy model for ethanol and alcohol-based hand sanitizer from sweet potato waste in the context of COVID-19

Produção de álcool de batata-doce variando as condições de fermentação e hidrólise

Food waste biorefinery advocating circular economy: Bioethanol and distilled beverage from sweet potato

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