996 resultados para Expansão industrial


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Pós-graduação em Agronomia (Energia na Agricultura) - FCA

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Pós-graduação em Geografia - FCT

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No sudeste paraense houve o encontro de duas frentes de expansão de duas formas de valorização dos recursos naturais, a produção camponesa e a extração mineral de grande escala, especialmente a partir da década de 1970, quando passaram a sofrer pressões e influências recíprocas. A dissertação analisa o papel exercido pelas atividades mineradoras sobre a estabilidade da produção camponesa em três assentamentos localizados no município paraense de, Brasil. A dissertação aponta que as dinâmicas decorrentes da instalação de grandes empreendimentos mineiros contribuíram para alterações na produção nos assentamentos. Entre as mudanças observadas houve a valorização da terra e a saída de filhos de assentados dos lotes em direção às cidades, o que debilitou a força de trabalho que sustenta a produção familiar. Houve pressão pela qualidade dos assentamentos, devido à demanda urbana crescente, ao mesmo tempo em que contribuiu para alterações em nível espacial e social no assentamento. A dissertação conclui indicando que, da interação com a mineração, surgem dinâmicas contrditórias no que concerne à estabilidade da produção camponesa nos assentamentos rurais estudados.

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O objetivo deste trabalho é evidenciar a existência de relações entre progresso técnico e desenvolvimento econômico no processo de formação da economia brasileira. Em seu aspecto mais específico, refere-se ao estudo do desenvolvimento da eletrificação e seus efeitos sobre o crescimento industrial no Estado de São Paulo, no período compreendido entre as duas décadas finais do século passado até a década de 1930. Durante este período - quando a economia e a sociedade brasileiras se transformam pelo desenvolvimento de relações de produção de natureza capitalista, ocorridas a partir do fim do escravismo, da introdução do trabalho assalariado, da expansão cafeeira, do aparecimento da ferrovia e dos bancos, das primeiras indústrias e, enfim, de atividades voltadas ao desenvolvimento do mercado interno - , o desenvolvimento da eletrificação e, especialmente, o uso de força motriz elétrica na indústria constituíram transformações essenciais. A o provocarem alterações irrevogáveis na base técnica da indústria contribuíram, também, para a alteração do padrão de acumulação.

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The changes occurring in Brazilian agriculture, with the inclusion of agro-industrial activities in your mode of production, must be analyzed to verify the changes in the behavior of territorial dynamics. Through changing the Rural Complex, traditional for the Agroindustrial Complex tightly integrated with trade and industry brought many consequences for the rural population, with regard to employment. Understanding this transformation capitalist the field is needed to analyze the actors involved in this process and the policies adopted for the expansion of sugar and ethanol activity in the State of São Paulo and the consequences for the spatial organization. The expansion of cane production areas were governed by the Institute of Sugar and Alcohol (IAA), the National Alcohol Program (PROÁLCOOL) Development Plan for the West of São Paulo - PRO-WEST and Expansion Program for the production of Canavicultura for production of fuel for the State of São Paulo (PROCANA). The occupation of these agroindustrial facilities in rural spaces contextualized by territorialization of the rural complex, in that sense, understanding these concepts is a key part development in the research. therefore, are concepts of fundamental importance to geographical science, and interpreting their function and construction in rural spaces

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As recentes discussões sobre o parque edificado envelhecido que vem se formando nas grandes cidades, levando ao abandono e degradação, principalmente das grandes áreas centrais, tem começado a impor mudanças no pensamento da sociedade como um todo, visando uma reinserçpão dessas áreas abandonadas em uma cidade que está beirando seus limites de expansão. Compreender o conceito de retrofit, bem como, buscar meios de alcançar um equilíbrio entre o velho e o novo, são alguns dos desafios do século XXI. Nesse contexto, o presente trabalho tem como objetivo aplicar os critérios, ainda recentes, do retrafit. Para tal, foi escolhido um edifício antigo, em estado de degradação, localizado na região central da cidade de São Paulo, que receberá o novo projeto de uma escola de moda

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One of the most primal ways of human work already known is the tessellation and ginning for the production of fabric and clothing - what used to be, back in those days, statement of power and status. The arrival of the Industrial Revolution - in the middle of the XVIII century at Britain - increased the textile industry production, and what used to be manufactured and hard to obtain, starts then to be produced in mechanical ways and large-scale. Despite all the boost given to the economy of an expanding capitalist market, it should be pointed out the consequences of this major industrialization, especially the environmental ones, more and more concerning nowadays. The emissions of waste - that sometimes could be toxic - in effluents can possibly contaminate the aquatic ecosystems, causing a huge damage to its fauna and flora, affecting therefore all the biodiversity, reaching inclusively the humans. To avoid these problems, a few strategies have been taking place in the attempt to eliminate - or at least reduce - the amount of dye found in the effluents, and as the textile industry constantly leaves waste, efficient methods - that present good results in a short period of time - with a low cost are needed. The present study will test the bioremoval capacity of yeast (Saccharomyces cerevisiae) in contact with dyes in a fix concentration, diluted in water with three different pH values. The tests will be done duplicate, and after the concentration analyses - made by spectrophotometry - it will be analyzed which pH shows major efficiency in the dye removal and what is the influence of the biomass in this process

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Faced with an agribusiness expansion scenario and the increase in fertilizer consumption due to the exponential growth of the population, it is necessary to make better use of existing reserves, by obtaining products of better quality and in adequate quantities to meet demand national. In Tapira Mining Complex, Vale Fertilizantes, the phosphate concentrate is produced with content of 35.0% P2O5 from ore with content of about 8.0% P2O5, which are intended to supply Complex Industrial Uberaba and Araxá Minero Chemical Complex for the production of fertilizers. The industrial flotation step responsible for the recovery of P2O5 and hence the viability of the business is divided into the crumbly, grainy and ultrathin circuits, and, friable and granular concentrate comprise the conventional concentrated. Today only 14.7% of the mass which feeds the mill product becomes, the remainder being considered losses in the process, and the larger mass losses are located in the waste of flotation, representing 42.3%. From 2012 to 2014, the daily global mass recovery processing plants varied from 12.4 to 15.9% while the daily metallurgical recovery of P2O5 from 48.7 to 82.4%. By the degree of variability, it appears that the plant operated under different conditions. Seen this, this study aimed to analyze the influence of operational and process variables in P2O5 mass and metallurgical recoveries of industrial flotation circuits of grainy, crumbly and ultrathin. And besides was made an analysis of the effect of ore variables, as degrees, hardnesse and the ore front 02 percentage, in global recoveries of processing plant and the effect of dosages of reagents in the recoveries obtained from the bench flotation using the experimental design methodology. All work was performed using the historical database of Vale Fertilizantes of Tapira-MG, where all independent variables were dimensionless as the experimental range used. To make the statistical analysis it used the response surface technique and the values of the independent variables that maximize recoveries were found by canonical analysis. In the study of industrial flotation circuit crispy were obtained from 41.3% mass recovery and 91.3% metallurgical recovery P2O5, good values for the circuit, and the highest recoveries occur for solids concentration of the new flotation power between 45 and 50%, which values are assigned to the residence time of the pulp in cells and industrial flotation columns. The greater the number of ore heaps resumed on the higher the mass recovery, but in this scenario flotation becomes unstable because there is enormous weight variation in the feed. Higher recoveries are obtained for mass depressant dosage exceeding 120 g / t for synthetic collector dosage of 11.6%. In the study of industrial flotation circuit of the granulate were obtained 28.3% to 79.4% mass recovery and metallurgical recovery of P2O5 being considered good values for the circuit. Higher recoveries are obtained when the front ore 02 percentage is above 90%, because the ore of this front have more clear apatite. Likewise recoveries increase when the level of pulp rougher step is highest due to the high mass of circulating step receives loads. In the analysis of industrial flotation circuit of the ultrafine were obtained 23.95% of mass recovery, and the same is maximized to depressant dosage and the top collector 420 and 300 g / t, respectively. The analysis of the influence of variables ore, it was observed that higher recoveries are obtained for ores with P2O5 content above 8.0%, Fe2O3 content in the order of 28% forward and 02 of ore percentage of 83%. Hard ore percentage has strong influence on recoveries due to mass division in the circuit that is linked to this variable. However, the hard ore percentage that maximizes recoveries was very close to the design capacity of the processing plant, which is 20%. Finally, the study of the bench flotation, has noted that in friable and granular circuits the highest recoveries are achieved for a collector dosage exceeding 250 g / t and the simultaneous increase of collector dosage and synthetic collector percentage contributes to the increase recovery in the flotation, but this scenario is suitable to produce a concentrate poorer in terms of P2O5 content, showing that higher recovery is not always the ideal scenario. Thus, the results show the values of variables that provide higher recoveries in the flotation and hence lower losses in the waste.