Economic evaluation of the replacement of sugar cane bagasse by vinasse, as a source of energy in a power plant in the state of Paraná, Brazil

Pazuch, Felix Augusto; Nogueira, Carlos Eduardo Camargo; Souza, Samuel Nelson Melegari de; Micuanski, Viviane Cavaler; Friedrich, Leandro; Lenz, Anderson M.

doi:10.1016/j.rser.2017.03.047

Cited by 56 publications

(36 citation statements)

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“…They also discussed scenarios under which power generation from vinasse with RCE could be economically viable. Interestingly, Pazuch et al [12] pointed out in a later study that the additional revenue from commercializing the surplus bagasse that would be freed if biogas was used to supply the internal power demand could already make this investment viable. The results by Moraes et al [13] agree on the fact that considerable surplus power production could be generated using anaerobic digestion of vinasse, comparable in scale to the surplus power derived from bagasse processing for certain mills.…”

Section: Prospective Technological Routes To Bioenergy Generationmentioning

confidence: 99%

“…x fert = r vin,treat θ vin,treat,fert (10) x el-b = r vin,biog θ vin,biog,el-b (11) x el-b ≤ Γ biog z biog (12) Notice that the latter inequality forces the variable x el-b to zero in case the decision is made to not invest in a vinasse digester.…”

Section: Sugarcane Plantwide Modelingmentioning

confidence: 99%

“…A large body of research has explored new economically feasible uses of bagasse, including improved combined heat and power (CHP) systems [5,6], and for the production of second-generation (2G) ethanol [7][8][9] and biogas [10]. The use of vinasse-the bottom product of the ethanol distillation process-for biogas generation has also been investigated [11][12][13] instead of their traditional use in fertirrigation of sugarcane plantations. But despite the advances promised by these new technological routes, the number of new bioelectricity projects has dropped significantly over the past few years [14].…”

Section: Introductionmentioning

confidence: 99%

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Risk-conscious optimization model to support bioenergy investments in the Brazilian sugarcane industry

et al. 2020

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The past decades have seen a diversification of the sugarcane industry with the emergence of new technology to produce bioenergy from by-product and waste process streams. Given Brazil's ambitious goal of reducing greenhouse gas emissions by over 40% below 2005 levels by 2030, it is of paramount importance to develop reliable decision-making systems in order to stimulate investment in these low-carbon technologies. This paper seeks to develop a more accurate optimization model to inform risk-conscious investment decisions for bioenergy generation capacity in sugarcane mills. The main objective is for the model to enable a better understanding of how Brazilian government policies, such as the electricity price in the regulated market, may impact these investments, by taking into account the uncertainty in sugar, ethanol and spot electricity markets and the interdependency between production and investment decisions in terms of saleable product mix. The proposed methodology combines portfolio optimization theory with superstructure process modeling and it relies on simple surrogates derived from a detailed sugarcane plant simulator to retain computational tractability and enable scenario analysis. The case study of an existing sugarcane plant is used to demonstrate the methodology and illustrate how the model can assist decision-makers. In all of the scenarios assessed, the model recommends investment in extra bioelectricity capacity via the anaerobic digestion of vinasse but advises against investment in second-generation ethanol production via the hydrolysis of surplus bagasse. Furthermore, the decision to upgrade the cogeneration system with a condensation turbine is highly sensitive to the electricity price practiced in the regulated market, capacity constraints on the sugar-ethanol mix, and the accepted level of risk. Another key insight drawn from the case study is that recent market conditions have favored a production focused on the sugar business, making it challenging for policy-makers to create attractive scenarios for biofuels. Long-term electricity contracting appears to be the main hedging strategy for de-risking other products and investments in the sugarcane business, provided it is priced adequately.

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Section: Prospective Technological Routes To Bioenergy Generationmentioning

confidence: 99%

Section: Sugarcane Plantwide Modelingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Risk-conscious optimization model to support bioenergy investments in the Brazilian sugarcane industry

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“…Several economic assessments using Excel ® and Aspen Plus ® have been used to determine the economic feasibility of AD as a source of bioenergy using different feedstocks such as municipal and household wastes, agro-industrial liquid and solid wastes, lignocellulosic biomass, and sugarbeet vinasse [17][18][19][20][21]. Unfortunately, few assessments have been developed specifically for sugarcane vinasses, and all the reported studies are focused on Brazil [22,23]. Fuess and Zaiat (2018) [24] used Excel ® to evaluate the main factors that govern the economic feasibility and profitability of using a vinasse-fed AD plant to generate bioenergy.…”

Section: Introductionmentioning

confidence: 99%

SuperPro Designer®, User-Oriented Software Used for Analyzing the Techno-Economic Feasibility of Electrical Energy Generation from Sugarcane Vinasse in Colombia

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et al. 2020

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SuperPro Designer® is a process simulator software used for analyzing the techno-economic feasibility of large-scale bioprocesses. Its predetermined built-in features allow for easy implementation by non-experts, but a lack of examples limits its appropriation. This study aims to validate the implementation of SuperPro Designer® by non-experts for the techno-economic analysis of anaerobic digestion in Colombia, using vinasse as feedstock. These results demonstrate the financial feasibility of such a process when a processing flow rate of 25 m3/h is ensured. Additionally, this study validates the manageability of the tool for assessing the economic feasibility of a technology, a key practice during technology development regardless of the area of expertise.

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“…nessa região concentrados os principais exportadores na época para Europa durante quatro séculos (XVI ao XVII)(PAZUCH et al, 2017;MACHADO, 2003).Aos poucos, seu cultivo foi sendo ampliado e, atualmente, o Brasil se tornou o principal produtor de cana de açúcar, sendo responsável por aproximadamente 40 % de toda a produção, o que equivale a aproximadamente 2,5 milhões de toneladas por ano (MOREIRA et al, 2018; ARIF; CLARK; LAKE, 2017).A cana é um insumo muito importante na produção de açúcar para o consumo humano. Além disso, ela pode ser utilizada na obtenção de bioetanol mediante a fermentação destes açúcares.…”

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Produção de celulases por fungos associados a caules de mandioca e aplicação na hidrólise de cana tratado com líquido iônico

Vedia¹

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Studies related to the attainment of new sources of enzymes have increased significantly, especially works regarding the glycosidase production, such as cellulases, xylanases, among others. In this context, this work verified the cellulase production from fungi associated with cassava stems. It also analyzed the efficiency to apply enriched extracts to this class of enzymes in the hydrolysis of sugar cane bagasse treated with the sec-butylammonium acetate ionic liquid (IL). For this, the cellulase production by 14 fungi isolated from cassava stems was evaluated, verifying a higher production by two fungi: the Annulohypoxylon stygium fungus (CA14), which showed a concentration of fermentable sugars during the microcrystalline cellulose hydrolysis of 0.83 ± 0.01 mg.mL-1 and the Phanerochaetaceae sp. fungus (CA17), with a concentration of 0.46 ± 0.03 mg.mL-1. Afterwards, the influence of time in the growth of these fungi (CA14 and CA17) in a liquid medium was verified. It was possible to determine an ideal growth period of 13 days for CA14 (enzymatic activity of 0.212 ± 0.002 FPU.mL-1) and 14 days for CA17 (0.201 ± 0.002 FPU.mL-1). Having verified the highest cellulase production by CA14, the ideal growth pH was also evaluated for this fungus (pH 4, activity of 0.427 ± 0.003 FPU.mL-1). Following the determination of the ideal growth condition for the CA14 fungus, a new growth process was realized. The enzymatic extract obtained was applied to the hydrolysis process of the sugar cane bagasse treated with the sec-butylammonium acetate IL (the best ionic liquid when compared to others evaluatedimidazolium acetate, imidazolium lactate, and secbutylammonium lactate). Finally, a prepurification of the enzymatic extract was carried out using an ammonium sulphate precipitation with saturations of 25, 50, and 75 %. All fractions were analyzed regarding the hydrolysis of the sugar cane bagasse treated with the selected IL, verifying a higher cellulase concentration in the fraction obtained after 50 % of saturation (0.430 ± 0.002 FPU.mL-1).

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Economic evaluation of the replacement of sugar cane bagasse by vinasse, as a source of energy in a power plant in the state of Paraná, Brazil

Cited by 56 publications

References 42 publications

Risk-conscious optimization model to support bioenergy investments in the Brazilian sugarcane industry

Risk-conscious optimization model to support bioenergy investments in the Brazilian sugarcane industry

SuperPro Designer®, User-Oriented Software Used for Analyzing the Techno-Economic Feasibility of Electrical Energy Generation from Sugarcane Vinasse in Colombia

Produção de celulases por fungos associados a caules de mandioca e aplicação na hidrólise de cana tratado com líquido iônico

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