Navegando por Assunto "Bioenergia"

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Acesso aberto (Open Access)
Alternativas para o abastecimento energético dos fornos de indústrias cerâmicas localizadas no município de São Miguel do Guamá-PA
(Universidade Federal do Pará, 2013-08-14) ROCHA, Alexander Lobo; NEVES, Renato Martins das; http://lattes.cnpq.br/6538317425557058
Economic and environmental differentials incorporated biomass energy has driven the spread of supply and use of biofuels in developed and developing countries. In the state of Pará (Brazil), the growing demand for biomass like acai lump and legalized firewood, specially related to the performance of the ceramic industry in the São Miguel do Guamá county and other industrial segments, pints to a possible shortage of these energy resources. Thus, initiative is needed to search for alternative fuels that are capable of not only ensuring the energy supply necessary for the current and future ceramic production of these industries, but also to ensure the continuation and conservation of renewable natural resources in the region. This work consolidates research among member companies of the Association of Ceramics Industries of São Miguel do Guamá, which are located in this municipality, using as a sample the ceramic companies seeking alternative bioenergy, along with the research among the agro-industries and farmers present in other municipalities of the state of Pará. The objective is to identify alternatives for energy supply in ceramic kilns, considering the use of renewable energy sources and opportunities for reducing the cost of its acquisition through the practice of return shipping. It was used as a research strategy case study in five moments of semi-structured interviews guided by questionnaires. The results obtained indicate that there is opportunity to supply biomass matched with the needs of the surveyed ceramic companies, with the potential to meet repressed energy demands and allowing the continuation of strategic business in Pará, as at this time, the growing civil construction industry.
Acesso aberto (Open Access)
Biomass yield and calorific value of six clonal stands of Eucalyptus urophylla S. T. Blake cultivated in Northeastern Brazil
(Universidade Federal de Lavras, 2013-09) ANDRADE, Thiago Cavalcante Gomes Ribeiro de; BARROS, Nairam Félix de; DIAS, Luiz Eduardo; AZEVEDO, Maria Inês Ramos
The worldwide demand for clean, sustainable energy has increased in recent years. A potential alternative energy source is biomass from nonnative forests, particularly from the genus Eucalyptus spp. in the specific case of Brazil, currently with several selected clonal stands for energy production. Because each stand adapts differently to different environments, specific studies are required in order to evaluate energy production in a given region. The objective of this study is to determine, from among six clonal stands of Eucalyptus urophylla S. T. Blake, which have greater potential for production of biomass and energy in the South Central region of Maranhão (Grajaú). Clonal stands planted at a spacing of 4 x 3 m apart were evaluated at age 41 months, distributed in a completely randomized design with five replicates. Each experimental plot consisted of 100 trees. Analysis included determining biomass yield and distribution in each tree portion as well as calorific value of bark and wood components. Out of the six clonal stands, two outdid the others both in biomass yield and in energy generation, surpassing the least yielding stand by up to 27%.
Acesso aberto (Open Access)
Sistemas agroindustriais integrados: uma análise por meio da entropia de informação
(2000-06) PONTE, Marcos Ximenes; VAN DYNE, Donald L.
Using the mathematical theory of the information, this article analyzes four agroindustry systems of bioenergy production: the industry of alcohol from sugar-cane in Brazil, the industry of corn alcohol and the industry of biodiesel in United States, besides the industry of manioc flour from the Amazonian. Based on an important group of empiric information, evaluations of energy efficiency for different organization levels of the systems are made.