scholarly journals Integrated analysis of land-use, energy and water systems for ethanol production from sugarcane in Bolivia

2020 ◽  
Author(s):  
Jenny Gabriela Pena Balderrama ◽  
Dilip Khatiwada ◽  
Francesco Gardumi ◽  
Thomas Alfstad ◽  
Silvia Ulloa Jimenez ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Ethanol Production ◽  
Environmental Impacts ◽  
Energy Production ◽  
Cost Optimization ◽  
Economic Benefits ◽  
Energy Output ◽  
Transport Sector ◽  
Integrated Analysis ◽  
Production Chain

Abstract The use of biomass for renewable energy production is one alternative to reduce the environmental impacts of energy production worldwide. Sugarcane-based ethanol is one of the most widespread biofuels in the road transport sector and its development has been encouraged by strong incentives on production and use in several countries. The growing realization on the environmental impacts of ethanol production indicates the need to increase the efficient utilization of biomass resources by optimizing the production chain sustainably. This papers evaluates enhancements in the ethanol production chain quantitatively by identifying opportunities for agricultural intensification and for investments in advanced biorefineries in a least-cost optimization model. Results of our model show that significant cost and environemtal benefits can be achieved by modernizing sugarcane agriculture in Bolivia. Demands for ethanol and sugar can be met cost-effectively by increasing sugarcane yields from the current country-average of 55.34 ton/ha to 85.7 ton/ha in 2030 with a moderate cropland expansion of 14.4 thousand hectares in the period 2019-2030. Our results further suggest that it is cost-optimal to invest in current technological advancements in efficient cogeneration to maximize the renewable energy output and the economic benefits of sugarcane ethanol. Finally, biofuel support in the range of 8-10 US$/GJ is required for investments in second-generation ethanol to be cost-competitive in the medium-term.

scholarly journals Integrated analysis of land-use, energy and water systems for ethanol production from sugarcane in Bolivia

2020 ◽  
Author(s):  
Jenny Gabriela Pena Balderrama ◽  
Dilip Khatiwada ◽  
Francesco Gardumi ◽  
Thomas Alfstad ◽  
Silvia Ulloa Jimenez ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Ethanol Production ◽  
Environmental Impacts ◽  
Energy Production ◽  
Economic Benefits ◽  
Environmental Benefits ◽  
Energy Output ◽  
Transport Sector ◽  
Integrated Analysis ◽  
Production Chain

Abstract The use of biomass for renewable energy production is one alternative to reduce the environmental impacts of energy production worldwide. Sugarcane-based ethanol is one of the most widespread biofuels in the road transport sector and its development has been encouraged by strong incentives on production and use in several countries. The growing realization on the environmental impacts of ethanol production indicates the need to increase the efficient utilization of biomass resources by optimizing the production chain sustainably. This paper evaluates enhancements in the ethanol production chain quantitatively by identifying opportunities for agricultural intensification and investments in advanced biorefineries in a least-cost optimization model. Results of our model show that significant cost and environmental benefits can be achieved by modernizing sugarcane agriculture in Bolivia. Demands for ethanol and sugar can be met cost-effectively by increasing sugarcane yields from the current country-average of 55.34 ton/ha to 85.7 ton/ha in 2030 with a moderate cropland expansion of 11.4 thousand hectares in the period 2019-2030. Our results further suggest that it is cost-optimal to invest in efficient cogeneration in biorefineries to maximize the renewable energy output and the economic benefits of sugarcane ethanol. Finally, biofuel support in the range of 8-10 US$/GJ is required for investments in second-generation ethanol in biorefineries to be cost-competitive in the medium-term..

scholarly journals Solar Green Roofs: A Unified Outlook Twenty Years On

2019 ◽  
Author(s):  
Rosaria Ciriminna ◽  
Francesco Meneguzzo ◽  
Mario Pecoraino ◽  
Mario Pagliaro
Keyword(s):  
Renewable Energy ◽  
Urban Areas ◽  
Energy Production ◽  
Green Roofs ◽  
Economic Benefits ◽  
Symbiotic Relationship ◽  
Photovoltaic Modules ◽  
Wide Range ◽  
The World ◽  
Renewable Energy Production

Solar green roofs, namely rooftops functionalized with properly selected living vegetation and photovoltaic modules, achieve an ideal symbiotic relationship in which promotion of biodiversity and onsite renewable energy production are both enhanced whereas the roof provides a wide range of environmental, health, aesthetic and economic benefits. This study provides a unified outlook of this eminent sustainable technology at the dawn of its uptake across the world, especially in polluted urban areas.

scholarly journals BIOGÁS E ÁGUA RESIDUÁRIA DE SUINOCULTURA: POTENCIAL DE PRODUÇÃO ENERGÉTICA

2019 ◽  
Vol 34 (3) ◽  
pp. 399-405
Author(s):  
Leonardo França da Silva ◽  
EMANUEL RANGEL SPADIM ◽  
BRUNA NOGUEIRA REZENDE ◽  
LETÍCIA DURON CURY ◽  
NATALIA LAÍS FELISARDO VIEIRA ARRUDA
Keyword(s):  
Renewable Energy ◽  
Energy Production ◽  
Alternative Energy ◽  
New Technologies ◽  
Biogas Production ◽  
Economic Benefits ◽  
Sao Paulo ◽  
Swine Wastewater ◽  
São Paulo ◽  
Renewable Sources

Biogás e água residuária de suinocultura: Potencial de produção energética   LEONARDO FRANÇA DA SILVA1, emanuel rangel spadim2, BRUNA NOGUEIRA REZENDE ³, LETÍCIA DURON CURY4, Natalia LAÍS FELISARDO VIEIRA ARRUDA5   1 Departamento de Economia, Sociologia e Tecnologia, Universidade Estadual Paulista –Unesp Av. Universitária, 3780, Alto Paraíso, 18610-034, Botucatu, São Paulo, Brasil, [email protected] 2 Departamento de Economia, Sociologia e Tecnologia, Universidade Estadual Paulista –Unesp Av. Universitária, 3780, Alto Paraíso, 18610-034, Botucatu, São Paulo, Brasil, [email protected], 3 Departamento de Engenharia Rural, Universidade Estadual Paulista –Unesp Av. Universitária, 3780, Alto Paraíso, 18610-034, Botucatu, São Paulo, Brasil, [email protected] 4 Departamento de Economia, Sociologia e Tecnologia, Universidade Estadual Paulista –Unesp Av. Universitária, 3780, Alto Paraíso, 18610-034, Botucatu, São Paulo, Brasil, [email protected] 5 Faculdade de Tecnologia de Botucatu – Fatec Av. José Ítalo Bacchi, s/n - Jardim Aeroporto, 18606-851, Botucatu, São Paulo, Brasil, [email protected]   RESUMO: Fontes renováveis de energia são consideradas atrativas pelos benefícios ambientais, sociais e econômicos envolvidos. Sendo assim, a elaboração de fontes alternativas de suprimento energético em menores escalas é uma forma de promover o desenvolvimento sustentável do Brasil. Com o avanço de novas tecnologias, além da grande produção de suínos no Brasil, o biogás tem potencial para aumentar a produção de energia, visto que o mesmo é tido como uma importante fonte de energia renovável. Com base nessas considerações, objetivou-se neste estudo, quantificar o potencial de geração de energia utilizando o biogás, oriundo dos dejetos produzidos por suínos em diversas regiões do Brasil. Levando em consideração o número de cabeças abatidas no Brasil no ano de 2017, tem-se o potencial de produção de biogás de 134.231 m3d-1 em todo o território nacional, o que equivale a 191.950 kWh de energia elétrica. A partir desses resultados, pode-se concluir que tal valor pode provocar um expressivo incremento no contexto nacional de geração de energia a partir de fontes renováveis e, com isto, tornar a implementação viável.   Palavras-chave: produção suinícola, fontes alternativas, energia na agricultura.   Biogas and swine wastewater: energy production potential   ABSTRACT: Renewable sources of energy are considered attractive for environmental, social and economic benefits. Therefore, the usage of alternative sources of energy supply in smaller scales is fundamental for the Brazil sustainable development. Linked with this situation and with the advancement of new technologies, associated to the great swine productions in Brazil, this makes the biogas has the potential to increase energy production, since it is considered as an important source of renewable energy. Based on these considerations, the aim of this study was to quantify the potential of energy generation using the biogas from the sludge produced by pigs in each region of Brazil. Taking into account the number of heads slaughtered in Brazil in 2017, there is a potential for biogas production of 134.231 m3d-1 in the whole national territory, equivalent to 191.950 kWh of electricity. From these results, it can be concluded that such value can cause a significant increase in the national context of generation of renewable energy renewable sources and with this, make the implementation feasible.   Keywords: swine production, alternative energy sources, energy in agriculture.

Analysis of IEEJ AGC30 Model Analysis Results using the Evaluation Method for Suppression of Fluctuations in Renewable Energy Output

2020 ◽  
Vol 140 (10) ◽  
pp. 715-723
Author(s):  
Tatsuya Oyama ◽  
Hisashi Kato ◽  
Norikazu Yamaguchi ◽  
Yuichi Tobita ◽  
Hideo Hosogoe ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Evaluation Method ◽  
Model Analysis ◽  
Energy Output

Assessing desalination as a sustainable alternative using a multiple criteria decision support model

2008 ◽  
Vol 3 (3) ◽  
Author(s):  
M. B. Fernandes ◽  
M. C. Almeida ◽  
A. G. Henriques
Keyword(s):  
Decision Support ◽  
Energy Production ◽  
Fossil Fuels ◽  
Cost Benefit Analysis ◽  
Cost Benefit ◽  
High Energy ◽  
Economic Benefits ◽  
Multiple Criteria ◽  
Water Production ◽  
Decision Support Model

Desalination technologies provide an alternative for potable water production, having significant potential for application where fresh water scarcity exists. Potential benefits have to be balanced with other factors, such as high costs, high energy consumption, and significant environmental impacts, for the understanding of real risks and gains of desalination within the context of integrated water resources management. Multiple factors can be considered when analysing the viability of a desalination project but often a limited approach is used. The complexity in the analysis lies in finding the alternatives that obey to multiple objectives (e.g. reduced environmental impact, social acceptance, less cost associated). In this paper, development of a methodology based on multiple criteria decision support system for the evaluation and ranking the potential of desalination technologies is described and applied to a Portuguese case study. Relevant factors to the selection of desalination technologies were identified using SWOT analysis and the MACBETH (Measuring Attractiveness by a Categorical Based Evaluation Technique) approach was applied. Technical alternatives considered include reverse osmosis and multi-effect desalination (MED), together with energy production by fossil fuels or solar energy. Production of water by conventional approaches was also considered. Results, for non-economic benefits, show higher score for MED solar but, in the cost-benefit analysis, conventional methods of water production have higher ranking since costs of renewable energies are not yet competitive. However, even if not preferred in economic terms, desalination is ranked significantly above the conventional approaches for non-economic criteria.

scholarly journals The Energy System of an Ecovillage: Barriers and Enablers

Land ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 682
Author(s):  
Zita Szabó ◽  
Viola Prohászka ◽  
Ágnes Sallay
Keyword(s):  
Renewable Energy ◽  
Spatial Structure ◽  
Energy Management ◽  
Energy Production ◽  
Renewable Energy Sources ◽  
Energy System ◽  
Energy Sources ◽  
Energy Management System ◽  
Production And Consumption ◽  
Ecologically Sustainable

Nowadays, in the context of climate change, efficient energy management and increasing the share of renewable energy sources in the energy mix are helping to reduce greenhouse gases. In this research, we present the energy system and its management and the possibilities of its development through the example of an ecovillage. The basic goal of such a community is to be economically, socially, and ecologically sustainable, so the study of energy system of an ecovillage is especially justified. As the goal of this community is sustainability, potential technological and efficiency barriers to the use of renewable energy sources will also become visible. Our sample area is Visnyeszéplak ecovillage, where we examined the energy production and consumption habits and possibilities of the community with the help of interviews, literature, and map databases. By examining the spatial structure of the settlement, we examined the spatial structure of energy management. We formulated development proposals that can make the community’s energy management system more efficient.

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