Subcritical water hydrolysis pretreatment of sugarcane bagasse to produce second generation ethanol

Oliveira, Tatiane Cristina Gonçalves de; Hanlon, K.E.; Interlandi, Marco A.; Torres-Mayanga, Paulo César; Silvello, Maria AC; Lachos‐Perez, Daniel; Timko, Michaël T.; Rostagno, Maurı́cio A.; Goldbeck, Rosana; Forster‐Carneiro, Tânia

doi:10.1016/j.supflu.2020.104916

Cited by 20 publications

(8 citation statements)

References 49 publications

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“…Indeed, previous laboratory experiments demonstrated the possibilities for generating ethanol from sugarcane by-products using SCWP. 22,23 Beyond this, a novel patent proposed by authors elucidated the technical viewpoint regarding the SCWP for industrial bioethanol production. 37 Therefore, the cost determination and economic indicators of the SCWP are some of the most important aspects of industrial implementation in a biorefinery.…”

Section: Simulation Resultsmentioning

confidence: 99%

“…In this work, the scale-up project was simulated with one grinding, four pretreatment vessels (SCWP), an evaporator, four hydrolysate reactors (enzymatic) and one fermenter, according to previous work. 22,23 The flowsheet also consists of mixers, product storage, splitter pumps and piping. The feedstock (straw or bagasse) is first ground in P-1/GR-101, and then stored in P-2/ DCS-101.…”

Section: Simulation Flowsheet and Gantt Chartmentioning

confidence: 99%

“…The optimum conditions obtained in the SCWP of sugarcane straw and bagasse to produce sugars were 200 °C and 15 MPa, with a residence time of 8 min. 22,23 The hydrolysate was cooled in the heat exchanger and had its pressure reduced to ambient conditions (25 °C, 0.1 MPa). The resulting liquid (hydrolysate) obtained after SCWP consisted of the final product used for fermentation and ethanol production.…”

Section: Subcritical Water Pretreatmentmentioning

confidence: 99%

“…The solution was submitted to fermentation in two different strategies. 22,23 The fermentation strategy 1 (FS1) consisted of 12 mL of hydrolysate inoculated with Saccharomyces cerevisiae. The fermentation strategy 2 (FS2) consisted of inoculation with S. cerevisiae and Scheffersomyces stipitis.…”

Section: Saccharification and Fermentationmentioning

confidence: 99%

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Cost analysis of subcritical water pretreatment of sugarcane straw and bagasse for second‐generation bioethanol production: a case study in a sugarcane mill

Lachos‐Perez¹,

Buller

Zabot

et al. 2021

Biofuels Bioprod Bioref

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The value of lignocellulose residues for green technologies has been growing, but biomass pretreatment is still an economic challenge. In this case study, a cost analysis of subcritical water pretreatment (SCWP) of sugarcane by-products for ethanol production was conducted. The proposed industrial scheme is attached to a Brazilian sugarcane mill, which generates a surplus of bagasse. Seven scenarios were simulated to address the prospects of the implementation of the process in the mill. The fermentation of sugarcane bagasse hydrolysate with Scheffersomyces stipitis upgraded the ethanol yield. The fixed capital investment of the industrial process was approximately US$27 million and 35% of this was associated with the SCWP. The highest ethanol yield was obtained for the process operated with hydrolysate from sugarcane bagasse (6740.5 kg ethanol day −1 ), which is associated with the high hemicellulose content in the bagasse composition compared with straw. The cost difference revealed that the fixed capital investment and utilities were the largest expenses for process implementation and operation. The simulated process reached 5.45 US$ L −1 as the lowest cost of manufacturing. However, this cost is approximately 10-fold higher than the market price for ethanol in Brazil. In conclusion, the SCWP of sugarcane straw and bagasse demands significant technical improvement before scaling up to the industrial scale for bioethanol production.

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Section: Simulation Resultsmentioning

confidence: 99%

Section: Simulation Flowsheet and Gantt Chartmentioning

confidence: 99%

Section: Subcritical Water Pretreatmentmentioning

confidence: 99%

Section: Saccharification and Fermentationmentioning

confidence: 99%

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Cost analysis of subcritical water pretreatment of sugarcane straw and bagasse for second‐generation bioethanol production: a case study in a sugarcane mill

Lachos‐Perez¹,

Buller

Zabot

et al. 2021

Biofuels Bioprod Bioref

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“…The main applications of subcritical water have been in the extraction of bioactive compounds from many food matrixes, such as flavonoids from mandarin [22] or black tea [23], anthocyanins [24], pectin [25], gallotannins [26], polyphenols from different fruits [27], caffeine [28], and essentials oils [29,30]. Likewise, its application in the hydrolysis of biopolymers such as polysaccharides and proteins has already been explored in coconut meal [31], monosaccharides for the production of ethanol from sugarcane bagasse [32], and in the release of amino acids from different sources, such as de-oiled rice bran [33], rapeseed cake [34], raw soybean [35], onion waste [36], bean dregs [37], scallop viscera entrails [38], or poultry intestines [39].…”

Section: Introductionmentioning

confidence: 99%

Protein Hydrolysis by Subcritical Water: A New Perspective on Obtaining Bioactive Peptides

et al. 2021

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The importance of bioactive peptides lies in their diverse applications in the pharmaceutical and food industries. In addition, they have been projected as allies in the control and prevention of certain diseases due to their associated antioxidant, antihypertensive, or hypoglycemic activities, just to mention a few. Obtaining these peptides has been performed traditionally by fermentation processes or enzymatic hydrolysis. In recent years, the use of supercritical fluid technology, specifically subcritical water (SW), has been positioned as an efficient and sustainable alternative to obtain peptides from various protein sources. This review presents and discusses updated research reports on the use of subcritical water to obtain bioactive peptides, its hydrolysis mechanism, and the experimental designs used for the study of effects from factors involved in the hydrolysis process. The aim was to promote obtaining peptides by green technology and to clarify perspectives that still need to be explored in the use of subcritical water in protein hydrolysis.

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Sustainable valorization of apple waste in a biorefinery: a bibliometric analysis

Oliveira

Ampese

Sforça

et al. 2022

Biofuels Bioprod Bioref

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This bibliometric study explored the scientific publications of apple waste over the period from 2000 to 2020, aiming to contribute to the sustainable development of the apple industry toward waste-biorefinery implementation, advocating a circular economy. The bibliometric study covered the publications' evolution, research areas, top-cited papers, international collaborative networks, top countries and journals. The results demonstrate that 628 documents (604 articles and 24 reviews) studied apple waste over the last 20 years, and the number of publications exponentially increased after 2010. The most used keywords revealed that the main studied topics in the field were associated with technologies to manage apple pomace, the main solid waste generated from juice production, demonstrating a research trend toward renewable energy and bio-based products. The bibliometric study indicated that the most productive countries are China, India and the USA. Apple waste could be an environmentally friendly feedstock for biorefinery design and implementation. The biorefinery could produce value-added products (polyphenols, pectin, sugars and essential oils) and bioenergy (ethanol, methane, electricity and heat) in different industrial arrangements. The main technological routes described in the literature have been associated with the production of lactic acid, xylitol, ethanol, bioactive compounds, xyloglucan, films, pectin, acetic acid, acetone-butanol-ethanol, emulsifiers and inulinase enzyme. In conclusion, this review contributes to the decision-making for the industrial implementation of a waste biorefinery, advocating circular economy transition based on the sustainable valorization of apple waste.

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Subcritical water hydrolysis pretreatment of sugarcane bagasse to produce second generation ethanol

Cited by 20 publications

References 49 publications

Cost analysis of subcritical water pretreatment of sugarcane straw and bagasse for second‐generation bioethanol production: a case study in a sugarcane mill

Cost analysis of subcritical water pretreatment of sugarcane straw and bagasse for second‐generation bioethanol production: a case study in a sugarcane mill

Protein Hydrolysis by Subcritical Water: A New Perspective on Obtaining Bioactive Peptides

Sustainable valorization of apple waste in a biorefinery: a bibliometric analysis

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