Maximum Energy Recovery
Mostrando 1-12 de 29 artigos, teses e dissertações.
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1. Determination of maximum zinc recovery of Vazante mine ore by flotation process
Abstract Nowadays, Nexa Resources (ex-Votorantim Metais) operates two zinc mines in Brazil, represented by the Vazante unit in Vazante - MG and the Morro Agudo unit in Paracatu - MG. The present study was carried out at the Vazante unit, where zinc concentrate is produced from a silicate ore called Willemite (Zn2SiO4) through froth flotation processes. The t
REM, Int. Eng. J.. Publicado em: 2019-06
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2. Development of Alternative Methods for Determining Soil Organic Matter
ABSTRACT Soil organic matter (SOM) is important to fertility, since it performs several functions such as cycling, water and nutrient retention and soil aggregation, in addition to being an energy requirement for biological activity. This study proposes new trends to the Embrapa, Walkley-Black, and Mebius methods that allowed the determination of SOM by spec
Rev. Bras. Ciênc. Solo. Publicado em: 29/08/2016
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3. ESTUDO EXPERIMENTAL DA COMBUSTÃO DO GLP E GLICEROL RESIDUAL DERIVADO DA PRODUÇÃO DE BIODIESEL EM MEIOS POROSOS RADIANTE / EXPERIMENTAL STUDY OF LPG COMBUSTION OF GLYCEROL AND RESIDUAL DERIVED FROM BIODIESEL PRODUCTION IN RADIANT POROUS MEDIA
The increasing production of biodiesel has caused increased production of residue glycerol. The large amount of glycerin (our glycerol) in the market causes a surplus unusable commercially and industrially, which should give a correct destination. At this point, the porous combustion is characterized by burning within an inert medium, to the pollutants reduc
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/05/2012
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4. Maximum profit cogeneration plant - MPCP: system modeling, optimization problem formulation, and solution
The well-known CGAM optimization problem was formulated to serve as a benchmark for comparison of different thermoeconomic methodologies. The CGAM cogeneration plant produced 30 MW of power and 14 kg/s of saturated vapor at 20 bar. The objective function was the total cost rate of the system, related to thermodynamic variables and installation costs. Because
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2011-03
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5. Recuperação de urânio de rejeito de mina por meio de lixiviação alcalina / Recovery of uranium from mine wastes by alkaline leaching
Appropriate management of wastes is one of the most important environmental problems, particularly concerning the tailings of mining activities. Interim storage of the tailings at incorrect places pending treatment demands an urgent solution. The Osamu Utsumi Mine located in the city of Caldas, Minas Gerais, has faced such problem. The waste of the mine cons
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/04/2010
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6. Energetic integration of extraction step of soybean oil, using Pinch analysis / IntegraÃÃo energÃtica da etapa de extraÃÃo de Ãleo de soja, utilizando a anÃlise Pinch
No processo de fabricaÃÃo de Ãleo de soja, o consumo de energia à extremamente alto, sendo sempre um tema de foco para criar alternativas de reduÃÃo do consumo energÃtico. Neste trabalho, realizou-se um estudo de caso de integraÃÃo energÃtica na etapa da extraÃÃo de uma fÃbrica de Ãleo de soja operando com produÃÃo mÃdia de 15.000 toneladas/
Publicado em: 2009
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7. Eficiência agronômica das adubações nitrogenadas de plantio e após o primeiro corte avaliada na primeira soca da cana-de-açúcar / Agronomic efficiency of nitrogen fertilization at planting and after the first harvest, evaluated during the first sugarcane ratoon cultivation
Renewable energy sources will gradually replace non-renewable sources due to economic sustainability reasons and to the rational use of natural resources. Consequently, this study aimed to investigate sugarcane nitrogen fertilization in detail, which may help the country to become a world model in the production and use of renewable biofuels. The current kno
Publicado em: 2008
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8. ANÁLISE DO DESEMPENHO DE UM SISTEMA DE COGERAÇÃO COM UMA MICROTURBINA A GÁS NATURAL / PERFORMANCE ANALYSIS OF A GAS FIRED MICROTURBINE BASED COGENERATION SYSTEM
In this dissertation the performance of a cogeneration system was simulated using data obtained in tests of a natural gas fired 30 kW microturbine, operated during peak hours, and coupled to a heat recovery unit to generate hot water to be consumed in the showers of the PUC-Rio Gymnasium, together with a thermal reservoir to match the demand. Initially, the
Publicado em: 2007
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9. Influencia da suplementação de proteinas do soro de leite na composição corporal, desempenho fisico e parametros bioquimicos de atletas juvenis de futebol. / Influence of the supplementation with whey proteins in body composition, physical performance and biochemistry parameters of young soccer players.
The soccer as well as other sporting modalities comes using the knowledge produced for training the athletes. These better training results in large distances covered during the game. So the better preparation of the muscle is need for the soccer players. The physical activity raises the proteins requirements, however, how much is not known accurately. The m
Publicado em: 2007
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10. Partial purification and cinetic-biochemistry characterization of α-galactosidase from Aspergillus terreus / Purificação parcial e caracterização bioquímico-cinética de α-galactosidase de Aspergillus terreus
The α-galactosidase has the potencial to hydrolyze α-1,6 linkages in galactose oligosaccharides (GO). These oligosaccharides are considered the major factors responsible for flatulence following ingestion of soybean and other seed legumes, due to the absence of this enzyme in the intestinal mucous membrane of men and monogastrics animals. Therefore
Publicado em: 2007
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11. Recuperação de solvente em miscelas oleo de soja/hexano utilizando tecnologia de membranas. / Soja/hexano solvent oil recovery in miscelas using technology of membranes.
Soybean oil is industrially obtained by hexane extraction, producing an oil/hexane miscella that is submitted to distillation for solvent recovery. The process with membranes present low energy consumption and have been proposed to replace or complete the traditional operations in removal of solvent. Furthermore, the use of this technology might result in co
Publicado em: 2005
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12. Modelagem e simulação do processo de separação de oleo de soja-hexano por evaporação
Until the two first decades of century XX, the industrial extraction of oleaginosas were carried out exclusively by mechanical process. This process allow to extracted oil of very good quality, but it leads the left residues in the solid material (pie) to be very high, for example 5% for grains as of soy. Such residues besides implying in loss of oil, affect
Publicado em: 2003