Navegando por Assunto "Silo"

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Acesso aberto (Open Access)
Caracterização das propriedades de fluxo da lama vermelha para fins de dimensionamento de silos: aplicação para tremonhas cônicas
(Universidade Federal do Pará, 2013-10-07) LOBATO, Júlio César Mendes; MESQUITA, André Luiz Amarante; http://lattes.cnpq.br/1331279630816662
One of the factors that affect the flow of bulk solids in silos is the moisture content, which stands out by favoring the formation of cohesive arches. In this sense, the aim of this work focused on determining the flow properties of the product red mud and its classification as to its flowability due to the variation of moisture content. Having the moisture influence on the flow in conical hoppers lined with smooth metal plates and UHMW (Ultra High Weight Polyethylene molecular ). To that end we used the direct shear apparatus "Jenike Shear Cell", along with the two wall surfaces. To determine the factor flow from the hopper and the angle of inclination to the horizontal, we used the graphics methodology proposed by Jenike for mass flow. And in determining the minimum diameter of the hopper, we applied the equations proposed by Jenike and Enstad. It was found that red mud is cohesive and has flow type hard with little variation for levels of moisture studied. The roughness of parades tested had a mild influence on the slope of the hopper. While the results of diameter variation experienced hopper relative moisture levels analyzed for red mud. From the observations made to flow in the silo acrylic model has been found that it rises to the level of moisture becomes more difficult the flow of red mud product.
Acesso aberto (Open Access)
Efeito do uso de diferentes inoculantes microbianos à fresco e liofilizados sobre a silagem de sorgo
(Universidade Federal do Pará, 2008-08-12) PINHEIRO, Greice Emanuele Vieira; FERNANDES, Paulo Campos Christo; http://lattes.cnpq.br/8172521920469798; SILVA, Almir Vieira; http://lattes.cnpq.br/9485881672181545
In the conservation of animal feed, the microbial inoculants are used in pursuit of improving the standard fermentation of silages, by encouraging the population development of the beneficial microorganisms in this process conservative, as the bacteria that produce lactic acid, rather than using inhibition of undesirable microorganisms such as yeasts and clostridia. The proposed study evaluated the effect of using different microbial inoculants to using fresh and freeze-dried sorghum [Sorghum bicolor (L.) Moench], as raw material for silage, to indicate the possibility of using microbial inoculants developed in the Brazil country. Were conducted two experiments in the same silo, Experiment 1 (treatment with freeze-dried inoculants in the upper region of the silo) and Experiment 2 (treatment with inoculants to cool in the lower silo), with five treatments and three replicates per silo the treatments being characterized as a control (without inoculum), commercial inoculant (IC) and the different inoculants made from lactic acid bacteria isolated from the sorghum plant: Lactobacillus plantarum, Lactobacillus paracasei and Lactobacillus rhamnosus. When silage were used three experimental silos of wood, which were opened at different periods, 1, 3 and 28 days after ensiling. We used the experimental design in split plot in time, in which the three periods were open on plots and subplots the five treatments in a completely randomized design. In experiment 1, the levels of neutral detergent fiber (NDF) and acid detergent fiber (ADF) had the effect of microbial inoculants on the 3rd and 28th day of opening the silos, getting lower values in treatments IC and LPP (L. plantarum + L. paracasei. In experiment 2, NDF, had an effect on the 28th day of opening of the silo, showing that the IC and LPP treatments differed significantly, being statistically equal to others. The combination of freeze-dried microbial isolates of L. plantarum and L. paracasei showed potential for practical use because it was so effective as treatment failure.