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Gerd Sparovek - One of the best experts on this subject based on the ideXlab platform.
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Brazilian Sugarcane Ethanol as an expandable green alternative to crude oil use
Nature Climate Change, 2017Co-Authors: Deepak Jaiswal, Amanda P. De Souza, Søren Larsen, David Lebauer, Fernando E. Miguez, Gerd Sparovek, Germán A. Bollero, Marcos Silveira Buckeridge, Stephen P. LongAbstract:Biofuels have lower CO2 emissions than fossil fuels, but competing land demands can limit expansion of production. This study shows Brazilian Sugarcane Ethanol could displace up to 13% of global crude oil consumption by 2045 whilst balancing forest conservation and future land demand for food. Reduction of CO2 emissions will require a transition from fossil fuels to alternative energy sources. Expansion of Brazilian Sugarcane Ethanol1,2 provides one near-term scalable solution to reduce CO2 emissions from the global transport sector. In contrast to corn Ethanol, the Brazilian Sugarcane Ethanol system may offset 86% of CO2 emissions compared to oil use, and emissions resulting from land-use change to Sugarcane are paid back in just 2–8 years3,4. But, it has been uncertain how much further expansion is possible given increasing demand for food and animal feed, climate change impacts and protection of natural ecosystems. We show that Brazilian Sugarcane Ethanol can provide the equivalent of 3.63–12.77 Mb d−1 of crude oil by 2045 under projected climate change while protecting forests under conservation5 and accounting for future land demand for food and animal feed production. The corresponding range of CO2 offsets is 0.55–2.0 Gigatons yr−1. This would displace 3.8–13.7% of crude oil consumption and 1.5–5.6% of net CO2 emission globally relative to data for 20146,7.
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Greenhouse gas balances and land use changes associated with the planned expansion (to 2020) of the Sugarcane Ethanol industry in Sao Paulo, Brazil
Biomass and Bioenergy, 2014Co-Authors: Andrea Egeskog, Gerd Sparovek, Göran Berndes, Flavio Luiz Mazzaro De Freitas, Stefan WirseniusAbstract:Brazil is expected to increase its Sugarcane production in the coming years. Almost 60% of the Brazilian Sugarcane production in 2012 was situated in the state of Sao Paulo, where production is expected to increase further. This paper reports estimated direct land use changes and greenhouse gas balances (including soil carbon stock changes) associated with expanding production of Sugarcane-based Ethanol in Sao Paulo state. Geographic information about the location of existing and planned Sugarcane mills and existing land use in these locations is used. Almost all of the Sugarcane expansion in 2004-2008 took place on roughly equal shares of cropland or pasture land. The locations of the planned mills indicate that most new Sugarcane might be planted on cropland unless the Sugarcane is sourced from longer distances than has typically been the case. These results confirm that Sugarcane expansion does not cause much direct deforestation but contrast with the view that direct competition for prime cropland is generally avoided since Sugarcane is mostly planted on extensively used pasture lands. Analyses of greenhouse gas emissions and savings support the view that expansion of Sugarcane Ethanol in Brazil will likely bring about substantial savings - unless the expansion causes significant emissions associated with indirect land use change. © 2014 Elsevier Ltd. All rights reserved.
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Sugarcane Ethanol production in Brazil: An expansion model sensitive to socioeconomic and environmental concerns
Biofuels Bioproducts and Biorefining, 2007Co-Authors: Gerd Sparovek, Göran Berndes, Andrea Egeskog, Flavio Luiz Mazzaro De Freitas, Stina Gustafsson, Julia HanssonAbstract:Brazilan agriculture is characteristically dynamic, land and production resources have a skewed ownership distribution, and agricultural production is essential for small holders of rural poor regions. Also, the main agricultural land use is composed of pastures where extensive livestock production prevails. Because of increasing demand Brazil is expected to expand its Sugarcane based Ethanol production. Addressing concerns about social and environmental impacts of such an expansion requires careful consideration of the complexity of Brazilian agriculture in general and specific local conditions in particular. This paper outlines an expansion model for Sugarcane Ethanol production that is sensitive to socioeconomic and environmental concerns. Through integration with the prevailing land use, the model avoids the usual displacement of extensive livestock production to remote regions, causing leakage effects with deforestation, promotes milk and beef cattle intensification, and investment opportunities for local society. The expansion model is feasible at current market conditions and should have good prospects for complying with sustainability criteria within various certification schemes presently under development. A case study, developed in the Pontal do Paranapanema region (State of Sao Paulo, Brazil) illustrates the model in agrarian reform settlements.
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Expanding Sugarcane Ethanol production in Brazil - Socioeconomic and climate effects of expanding Sugarcane Ethanol production in the Pontal do Paranapanema region (State of São Paulo, Brazil)
2007Co-Authors: Göran Berndes, Andrea Egeskog, Stina Gustafsson, Julia Hansson, Flavio L. M. Freitas, Gerd SparovekAbstract:This paper presents results from a study of socioeconomic and climate effects connected to a Sugarcane expansion scenario in the Pontal do Paranapanema region, Sao Paulo state, Brazil. Sugarcane production is expected to grow in the Sao Paulo state. Pontal do Paranapanema is the only region in the state where a large scale Sugarcane expansion can take place and there is a concern that without guidelines the expansion might affect income growth in a negative way. A scenario where the settlers in the region gain from the Sugarcane expansion was modelled. The models showed that it is possible to introduce Sugarcane in the region with positive effects both on income growth and greenhouse gas emissions.
Andrea Egeskog - One of the best experts on this subject based on the ideXlab platform.
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Land and climate effects of bioenergy - Brazilian Sugarcane Ethanol and combined biofuel-district heating in Europe
2016Co-Authors: Andrea EgeskogAbstract:According to the Intergovernmental Panel on Climate Change, use of fossil fuels is the largest source of the increase in atmospheric CO2. The second largest is land use change. To reach stringent climate targets, emissions from fossil fuel combustion and land use change will need to be reduced to near zero within a few decades. Biomass is a renewable energy source that can be used to replace fossil fuels. However, it is a limited resource, expected to become scarce relative to future demand, prompting interest in optimizing efficiency. Further, when biomass for biofuels expands into new land areas, the total biospheric carbon stock (the sum of soil and above-ground carbon) may increase or decrease, influencing the net effect on greenhouse gas balances. This thesis, which consists of five separate papers, analyzes several key aspects associated with two bioenergy systems: (i) combined biofuels and district heat production in the EU and (ii) Sugarcane for Ethanol production in Brazil, with special attention to integration with existing food and energy systems. The overall aim is to investigate specific options for improving management of land use and land use change, efficient use of resources, and greenhouse gas balances for specific bioenergy systems. In Paper I, we study biomass gasification for the production of biofuels and heat for district heating systems in Europe. We find that each investigated country, except Italy, has a heat sink capacity in its district heating systems that is larger than the amount of heat that would be co-generated in plants producing biofuel volumes corresponding to national biofuel targets. In Papers II–V, we study expansion of Sugarcane Ethanol production in Brazil at the regional, state, and national levels, including both conventional Sugarcane Ethanol systems and combined Ethanol-milk production systems in which Sugarcane residues are used as animal feed. We find that the harvest method influences greenhouse gas emissions from Sugarcane-based Ethanol production, as does the impact on soil carbon content. How the by-product bagasse is used also affects the results. For Paper V, we interview Brazilian farmers and landholders regarding their actions connected to engaging with Sugarcane production. We find that it is common among the interviewees to invest profits from Sugarcane production to maintain and improve the prior beef and milk production systems. This likely affects indirect land use change associated with Sugarcane expansion on former pasture land.
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Greenhouse gas balances and land use changes associated with the planned expansion (to 2020) of the Sugarcane Ethanol industry in Sao Paulo, Brazil
Biomass and Bioenergy, 2014Co-Authors: Andrea Egeskog, Gerd Sparovek, Göran Berndes, Flavio Luiz Mazzaro De Freitas, Stefan WirseniusAbstract:Brazil is expected to increase its Sugarcane production in the coming years. Almost 60% of the Brazilian Sugarcane production in 2012 was situated in the state of Sao Paulo, where production is expected to increase further. This paper reports estimated direct land use changes and greenhouse gas balances (including soil carbon stock changes) associated with expanding production of Sugarcane-based Ethanol in Sao Paulo state. Geographic information about the location of existing and planned Sugarcane mills and existing land use in these locations is used. Almost all of the Sugarcane expansion in 2004-2008 took place on roughly equal shares of cropland or pasture land. The locations of the planned mills indicate that most new Sugarcane might be planted on cropland unless the Sugarcane is sourced from longer distances than has typically been the case. These results confirm that Sugarcane expansion does not cause much direct deforestation but contrast with the view that direct competition for prime cropland is generally avoided since Sugarcane is mostly planted on extensively used pasture lands. Analyses of greenhouse gas emissions and savings support the view that expansion of Sugarcane Ethanol in Brazil will likely bring about substantial savings - unless the expansion causes significant emissions associated with indirect land use change. © 2014 Elsevier Ltd. All rights reserved.
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Sugarcane Ethanol production in Brazil: An expansion model sensitive to socioeconomic and environmental concerns
Biofuels Bioproducts and Biorefining, 2007Co-Authors: Gerd Sparovek, Göran Berndes, Andrea Egeskog, Flavio Luiz Mazzaro De Freitas, Stina Gustafsson, Julia HanssonAbstract:Brazilan agriculture is characteristically dynamic, land and production resources have a skewed ownership distribution, and agricultural production is essential for small holders of rural poor regions. Also, the main agricultural land use is composed of pastures where extensive livestock production prevails. Because of increasing demand Brazil is expected to expand its Sugarcane based Ethanol production. Addressing concerns about social and environmental impacts of such an expansion requires careful consideration of the complexity of Brazilian agriculture in general and specific local conditions in particular. This paper outlines an expansion model for Sugarcane Ethanol production that is sensitive to socioeconomic and environmental concerns. Through integration with the prevailing land use, the model avoids the usual displacement of extensive livestock production to remote regions, causing leakage effects with deforestation, promotes milk and beef cattle intensification, and investment opportunities for local society. The expansion model is feasible at current market conditions and should have good prospects for complying with sustainability criteria within various certification schemes presently under development. A case study, developed in the Pontal do Paranapanema region (State of Sao Paulo, Brazil) illustrates the model in agrarian reform settlements.
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Modelling Sugarcane expansion - Socioeconomic and climate effects from an expansion in the Pontal do Paranapanema region, state of Sao Paulo, Brazil
2007Co-Authors: Stina Gustafsson, Andrea EgeskogAbstract:This thesis presents results from a study of socioeconomic and climate effects connected to a Sugarcane Ethanol expansion scenario in the Pontal do Paranapanema region, Sao Paulo state, Brazil. Sugarcane Ethanol prodcution is expected to grow in the Sao Paulo state. Pontal do Paranapanema is the only region in the state where a large scale Sugarcane expansion can take placre and this expansion will likely affect the rural family farmers in the region. There is concern that without guidelines the expansion might affect income growth in a negative way for the family farmers living in the area. Two models were created one for calculating income growth for the family farmers when introducing a combined Sugarcane and milk prodution system. The other model calculated energy and emissions from a Sugarcane expansion and the introduced production system. The model analyses indicate that income could more than double for family farmers if a combined Sugarcane and milk production system is introduced. At the same time, the global emissions of greenhouse gases could be significantly reduced if the Ethanol from such production replaced gasoline used for transport in EU.
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Expanding Sugarcane Ethanol production in Brazil - Socioeconomic and climate effects of expanding Sugarcane Ethanol production in the Pontal do Paranapanema region (State of São Paulo, Brazil)
2007Co-Authors: Göran Berndes, Andrea Egeskog, Stina Gustafsson, Julia Hansson, Flavio L. M. Freitas, Gerd SparovekAbstract:This paper presents results from a study of socioeconomic and climate effects connected to a Sugarcane expansion scenario in the Pontal do Paranapanema region, Sao Paulo state, Brazil. Sugarcane production is expected to grow in the Sao Paulo state. Pontal do Paranapanema is the only region in the state where a large scale Sugarcane expansion can take place and there is a concern that without guidelines the expansion might affect income growth in a negative way. A scenario where the settlers in the region gain from the Sugarcane expansion was modelled. The models showed that it is possible to introduce Sugarcane in the region with positive effects both on income growth and greenhouse gas emissions.
Carlos Ricardo Soccol - One of the best experts on this subject based on the ideXlab platform.
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economic process to produce biohydrogen and volatile fatty acids by a mixed culture using vinasse from Sugarcane Ethanol industry as nutrient source
Bioresource Technology, 2014Co-Authors: Eduardo Bittencourt Sydney, Christian Larroche, Alessandra Cristine Novak, Régis Nouaille, Saurabh Jyoti Sarma, Satinder Kaur Brar, Luiz Alberto Junior Letti, Vanete Thomaz Soccol, Carlos Ricardo SoccolAbstract:abstract This work evaluates the potential of vinasse (a waste obtained at the bottom of Sugarcane Ethanol distil-lation columns) as nutrient source for biohydrogen and volatile fatty acids production by means of anaer-obic consortia. Two different media were proposed, using Sugarcane juice or molasses as carbon source.The consortium LPBAH1 was selected for fermentation of vinasse supplemented with Sugarcane juice,resulting in a higher H 2 yield of 7.14 molH 2 molsucrose 1 and hydrogen content in biogas of approx.31%, while consortium LPBAH2 resulted in 3.66 molH 2 /molsucrose and 32.7% hydrogen content in biogas.The proposed process showed a rational and economical use for vinasse, a mandatory byproduct of therenewable Brazilian energy matrix. 2014 Elsevier Ltd. All rights reserved. 1. IntroductionAlmost 100% of the (increasing) energetic demand is suppliedby carbon-containing fossil sources such as oil, coal and naturalgas. The environmental concerns involving the use of such sourcesof energy are related to the increase inatmospheric carbon concen-tration, which is the main cause of global warming and climatechange.The gradual introduction of fuels with increasingly lower car-bon content (wood, coal, oil, natural gas) results in continuousdecarbonization of the global fuel mix, which ends up as hydrogen.Hydrogen has a higher gravimetric energy density than any otherknown fuel and is compatible with electrochemical and combus-tion processes for energy conversion without producing the car-bon-based emissions that contribute to environmental pollutionand climate change (Cuetos et al., 2007).Hydrogen can be produced through chemical, physical and bio-logical processes. Among the biological ones, the most studied arephoto-fermentation and dark fermentation. The advantages of darkfermentation over other biological processes are: (i) better processeconomy for lower energy requirements, (ii) process simplicity,(iii) higher rates of hydrogen production, and (iv) utilization oflow-value waste as raw materials (Kim et al., 2008).Among the wide range of by-products of diverse microbialmetabolism, the two pathways producing hydrogen from
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Economic process to produce biohydrogen and volatile fatty acids by a mixed culture using vinasse from Sugarcane Ethanol industry as nutrient source.
Bioresource technology, 2014Co-Authors: Eduardo Bittencourt Sydney, Christian Larroche, Alessandra Cristine Novak, Régis Nouaille, Saurabh Jyoti Sarma, Satinder Kaur Brar, Luiz Alberto Junior Letti, Vanete Thomaz Soccol, Carlos Ricardo SoccolAbstract:This work evaluates the potential of vinasse (a waste obtained at the bottom of Sugarcane Ethanol distillation columns) as nutrient source for biohydrogen and volatile fatty acids production by means of anaerobic consortia. Two different media were proposed, using Sugarcane juice or molasses as carbon source. The consortium LPBAH1 was selected for fermentation of vinasse supplemented with Sugarcane juice, resulting in a higher H2 yield of 7.14 molH2 molsucrose(-1) and hydrogen content in biogas of approx. 31%, while consortium LPBAH2 resulted in 3.66 molH2/molsucrose and 32.7% hydrogen content in biogas. The proposed process showed a rational and economical use for vinasse, a mandatory byproduct of the renewable Brazilian energy matrix.
Antonio Bonomi - One of the best experts on this subject based on the ideXlab platform.
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Future Perspectives of Sugarcane Biofuels
Sugarcane Biofuels, 2019Co-Authors: Luís Augusto Barbosa Cortez, Telma Teixeira Franco, Antonio BonomiAbstract:Biofuels need to be sustainable, with low GHG emissions, no use of forest lands, and no competition with food production, and should still be produced at low and competitive cost. The requirements for biofuels to fulfill are somehow “not fair” because they need not only to help reducing GHG emissions but also satisfy requirements they simply were not designed for. Nevertheless, the two most important modern biofuel production systems are the Brazilian Sugarcane Ethanol and the US corn Ethanol. One may ask, what happened with Ethanol in these two countries that made their production systems a success? Somehow, in both systems the environment aspect is considered satisfactory, and there is no competition with food production. However, what makes them a success is the economics involved in both cases. Biofuels need to be produced sharing its cost with its coproducts, animal feed (DDG) for the corn Ethanol case and sugar and electricity in the case of Sugarcane Ethanol. Brazil became the first world sugar exporter because of its Sugarcane Ethanol program, and the United States produced a quite strong beef industry in great part due to its correspondent DDG production largely used as animal feed. However, in both cases, DDG in the United States and sugar in Brazil are relatively saturated. In both countries, a new model will need to be invented. This chapter intends to analyze these issues and discuss the advantages of different production models. Also, the future perspectives of Sugarcane biofuels are analyzed in the light of contributing to the global GHG emissions reduction and technology development of the most important biofuel alternatives.
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Sugarcane Ethanol and beef cattle integration in Brazil
Biomass and Bioenergy, 2019Co-Authors: Nariê Rinke Dias De Souza, Juliana Aparecida Fracarolli, Tassia L. Junqueira, Mateus F. Chagas, Terezinha De Fátima Cardoso, Marcos D.b. Watanabe, Otávio Cavalett, Solismar P. Venzke Filho, Bruce E. Dale, Antonio BonomiAbstract:Abstract New models for renewable energy production are needed to simultaneously decrease greenhouse gases (GHG) emissions, use land more efficiently and replace large amounts of fossil fuel. Ethanol production and livestock feed integration as practiced in the United States (USA) is one model for Ethanol production combined with animal feed production. Brazil, the second largest Ethanol and beef cattle producer in the world, can adapt the USA model of corn Ethanol and cattle integration considering its local characteristics. This paper evaluates the techno-economic and environmental feasibility of Sugarcane Ethanol and cattle integration, thereby avoiding pasture displacement into forests or other sensitive lands. Cattle can be fattened in feedlots using some Sugarcane Ethanol byproducts. Intensification of cattle production by integration with Sugarcane production releases pasture area to produce more biofuels, without needing more land for cattle production. The release of pasture land to produce more Sugarcane results in what we call “avoided ILUC”, the resultant reduced GHG emissions compared to conventional Sugarcane Ethanol, because no additional land is needed to accommodate an additional Sugarcane Ethanol production. Simulations were performed using the Virtual Sugarcane Biorefinery (VSB) model developed by the Brazilian BioEthanol Science and Technology Laboratory (CTBE). We calculated as economic parameters the internal rate of return (IRR), net present value (NPV) and payback time. Climate impacts were assessed via Life Cycle Assessment. Sugarcane and cattle integration decreases overall climate impacts compared to non-integrated systems. Techno-economic feasibility is achieved by additional land rental revenues for released pasture area and by carbon credits.
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Comparison of biofuel life-cycle GHG emissions assessment tools: The case studies of Ethanol produced from Sugarcane, corn, and wheat
Renewable and Sustainable Energy Reviews, 2019Co-Authors: Lucas G. Pereira, Antonio Bonomi, Otávio Cavalett, Yimin Zhang, E. Warner, H.l. ChumAbstract:Abstract The use of alternative fuels, particularly bio-based fuels, has been an important strategy to achieve greenhouse gas (GHG) emission reductions compared to petroleum-based fuels. However, discrepancies between results obtained by using different attributional life-cycle assessment (LCA) tools have challenged the credibility of the individual assessments, and as result, the progress towards or compliance with GHG mitigation targets. The objective of this study was to identify the main differences and commonalities in methodological structures, calculation procedures, and assumptions for the major commercial biofuel, Ethanol, across three public LCA tools, BioGrace (EU), GHGenius (Canada), and GREET (U.S.), and a research-oriented fourth, the Virtual Sugarcane Biorefinery (VSB), a Brazilian platform for Sugarcane Ethanol assessments. The calculated emissions across models ranged from 16 to 45 for Sugarcane, 43–62 for corn, and 45–68 g CO2eq MJ−1 for wheat Ethanol. Harmonizing the three public models with VSB assumptions for Sugarcane Ethanol produced in Brazil, the range was reduced to 16–17 g CO2eq MJ−1 for Sugarcane Ethanol. Agricultural production (e.g., N2O emissions from fertilizers; energy and fuel use; straw field-burning; and limestone application) and Ethanol shipping were found to be the major causes for variations for differences calculated for Sugarcane Ethanol. Similarly, harmonizing BioGrace and GHGenius calculations using GREET assumptions for U.S. corn Ethanol generated nearly identical results (models varied within a 3% range). The coproduct treatment method was found to be the most influential parameter in the variations calculated for both corn and wheat Ethanol. The application of the tools as part of GHG emissions accounting requirements is often defined via regulations and differences and/or conflicting assumptions set-forth in these models lead to most differences observed. Our study provides recommendations for promoting transparency in LCA calculations and assumptions across the tools used in research and development or for regulatory tools regarding biofuels.
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Sustainable Production of Food and Bioenergy: Techno- economic and Environmental Assessment of Sugarcane Ethanol and Livestock Integration
Chemical engineering transactions, 2018Co-Authors: Tassia L. Junqueira, Mateus F. Chagas, Marcos D.b. Watanabe, N.r.d. Souza, Charles D.f. Jesus, R. Maciel Filho, Antonio BonomiAbstract:Despite their advantages when replacing fossil fuels, biofuels have faced some concerns related to their expansion within the so-called “food vs. bioenergy” debate. This debate relies on the premise that the use of food crops and/or the increase of land use for bioenergy production would affect food availability and price. Nevertheless, it is worth to mention that livestock production is the largest anthropic use of land resources worldwide. In Brazil, livestock production mainly consists of extensive management with low technology level, which results in a low average productivity. The intensification of this system would release pasture areas to expand cropland for biofuels production. In this way, the integration of Sugarcane Ethanol and livestock production would allow taking advantage of the synergies between both systems; for instance, using Sugarcane agroindustrial residues as animal feed ingredients in feedlot systems. In addition, Ethanol production from lignocellulosic feedstock (second-generation process) is also a possible solution towards a productive land use, since a larger amount of biofuels can be produced per crop area. This work focuses on the sustainability assessment of a first- and second-generation (1G2G) Ethanol facility that produces animal feed using Sugarcane by-products integrated to livestock production in feedlots. The Virtual Sugarcane Biorefinery (VSB) – a computer framework that simulates the entire production chain and assesses the sustainability impacts of different biorefinery alternatives/routes – was used in this work. This paper indicates that the integration of a future 1G2G Sugarcane mill with intensive livestock system may be a feasible alternative. Regarding the economic performance, verticalization of a mill with intensive livestock is preferable when compared to extensive cattle production. Integrated scenarios also have environmental advantages, such as the production of more outputs using the same area, as well as more efficient technologies that may represent lower emissions. In addition, this paper revealed that it is possible to sustainably produce biofuels without displacing food crops or livestock production, which otherwise could advance, for example, in forest areas.
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anaerobic digestion of vinasse from Sugarcane Ethanol production in brazil challenges and perspectives
Renewable & Sustainable Energy Reviews, 2015Co-Authors: Bruna De Souza Moraes, Marcelo Zaiat, Antonio BonomiAbstract:The replacement of fossil fuels by biofuels has been extremely important worldwide to stimulate the growth of economies based on the sustainability through the use of renewable resources. Anaerobic digestion for biogas production is recognized as a clean technology that allies the suitability of wastes with energy generation, fulfilling the requirements for a sustainable alternative to provide the optimization of the biofuels production. This alternative is especially interesting for the Sugarcane Ethanol production in Brazil, in which the generation of vinasse, the main liquid waste, is very expressive. Nevertheless, the use of vinasse for anaerobic digestion has been finding some challenges to its establishment in the Brazilian Sugarcane biorefineries. This paper reviews the actual context of anaerobic digestion within the Sugarcane Ethanol production in Brazil, presenting the main obstacles for its full application and the directions to promote it as well. Alternatives for biogas use are also presented and compared, highlighting the environmental and energy advantages of applying anaerobic digestion in the Sugarcane biorefineries. This scenario is envisaged as a suitable way to achieve the future biorefineries model, based on the use and recovery of renewable resources with economic, social, and environmental benefits.
Eduardo Bittencourt Sydney - One of the best experts on this subject based on the ideXlab platform.
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economic process to produce biohydrogen and volatile fatty acids by a mixed culture using vinasse from Sugarcane Ethanol industry as nutrient source
Bioresource Technology, 2014Co-Authors: Eduardo Bittencourt Sydney, Christian Larroche, Alessandra Cristine Novak, Régis Nouaille, Saurabh Jyoti Sarma, Satinder Kaur Brar, Luiz Alberto Junior Letti, Vanete Thomaz Soccol, Carlos Ricardo SoccolAbstract:abstract This work evaluates the potential of vinasse (a waste obtained at the bottom of Sugarcane Ethanol distil-lation columns) as nutrient source for biohydrogen and volatile fatty acids production by means of anaer-obic consortia. Two different media were proposed, using Sugarcane juice or molasses as carbon source.The consortium LPBAH1 was selected for fermentation of vinasse supplemented with Sugarcane juice,resulting in a higher H 2 yield of 7.14 molH 2 molsucrose 1 and hydrogen content in biogas of approx.31%, while consortium LPBAH2 resulted in 3.66 molH 2 /molsucrose and 32.7% hydrogen content in biogas.The proposed process showed a rational and economical use for vinasse, a mandatory byproduct of therenewable Brazilian energy matrix. 2014 Elsevier Ltd. All rights reserved. 1. IntroductionAlmost 100% of the (increasing) energetic demand is suppliedby carbon-containing fossil sources such as oil, coal and naturalgas. The environmental concerns involving the use of such sourcesof energy are related to the increase inatmospheric carbon concen-tration, which is the main cause of global warming and climatechange.The gradual introduction of fuels with increasingly lower car-bon content (wood, coal, oil, natural gas) results in continuousdecarbonization of the global fuel mix, which ends up as hydrogen.Hydrogen has a higher gravimetric energy density than any otherknown fuel and is compatible with electrochemical and combus-tion processes for energy conversion without producing the car-bon-based emissions that contribute to environmental pollutionand climate change (Cuetos et al., 2007).Hydrogen can be produced through chemical, physical and bio-logical processes. Among the biological ones, the most studied arephoto-fermentation and dark fermentation. The advantages of darkfermentation over other biological processes are: (i) better processeconomy for lower energy requirements, (ii) process simplicity,(iii) higher rates of hydrogen production, and (iv) utilization oflow-value waste as raw materials (Kim et al., 2008).Among the wide range of by-products of diverse microbialmetabolism, the two pathways producing hydrogen from
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Economic process to produce biohydrogen and volatile fatty acids by a mixed culture using vinasse from Sugarcane Ethanol industry as nutrient source.
Bioresource technology, 2014Co-Authors: Eduardo Bittencourt Sydney, Christian Larroche, Alessandra Cristine Novak, Régis Nouaille, Saurabh Jyoti Sarma, Satinder Kaur Brar, Luiz Alberto Junior Letti, Vanete Thomaz Soccol, Carlos Ricardo SoccolAbstract:This work evaluates the potential of vinasse (a waste obtained at the bottom of Sugarcane Ethanol distillation columns) as nutrient source for biohydrogen and volatile fatty acids production by means of anaerobic consortia. Two different media were proposed, using Sugarcane juice or molasses as carbon source. The consortium LPBAH1 was selected for fermentation of vinasse supplemented with Sugarcane juice, resulting in a higher H2 yield of 7.14 molH2 molsucrose(-1) and hydrogen content in biogas of approx. 31%, while consortium LPBAH2 resulted in 3.66 molH2/molsucrose and 32.7% hydrogen content in biogas. The proposed process showed a rational and economical use for vinasse, a mandatory byproduct of the renewable Brazilian energy matrix.
