Filter Bed
Mostrando 13-24 de 31 artigos, teses e dissertações.
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13. Real time orbit determination using GPS navigation solution
This work analyses a real time orbit estimator using the raw navigation solution provided by GPS receivers. The estimation algorithm considers a Kalman filter with a rather simple orbit dynamic model and random walk modeling of the receiver clock bias and drift. Using the Topex/Poseidon satellite as test bed, characteristics of model truncation, sampling rat
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2007-09
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14. Biofilter efficiencies in the purification and deodorization of hydrogen sulfide emissions / Desempenho de filtro biológico na depuração e desodorização de emissões de sulfeto de hidrogênio
Traditionally the industrial waste gases have been treated by physical-chemical processes, such as scrubbers, absorption, condensation and oxidation. Although these techniques presented great efficiency, the need to add chemical products and the replacement of adsorbent results in relatively high operational costs compared to biological treatment techniques.
Publicado em: 2007
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15. Desempenho de reatores anaeróbios de leito fixo no tratamento de águas residuárias da lavagem e descascamento/despolpa dos frutos do cafeeiro / Performance of the anaerobic fixed-bed reactors in the treatment of wastewater from the washing and pulping/husking the cherries of the coffee shrub
Three anaerobic fixed-bed reactors with upflow and containing immobilized biomass were operationally evaluated for the treatment of wastewater from the coffee cherries processing (WCP). Because the performance of those reactors are related to the supportive medium providing adherence and growth to the biofilm, the following materials were studied: blast furn
Publicado em: 2007
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16. Floto-filtração como pós-tratamento de efluente de reator anaeróbio tratando esgoto sanitário / Floto-filtration as post-treatment of an anaerobic reactor effluent
Este trabalho compreende o estudo do desempenho de sistema piloto de floto-filtração, aplicado ao pós-tratamento de efluente de reator anaeróbio, sob diferentes taxas de aplicação superficial, quantidade de ar fornecida ao processo e leitos filtrantes. O trabalho foi dividido em duas fases: ensaios preliminares (fase 1) e ensaios com o floto-filtro (fa
Publicado em: 2007
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17. Remoção de Oocistos de Cryptosporidium por filtração direta: Influência de alguns aspectos operacionais / Removal of Cryptosporidium Oocysts by direct filtration: the influence some operational aspects
The present work deal with the removal of Cryptosporidium oocysts by downflow direct filtration with almost uniform filter bed to verify the influence of operational aspects such as coagulant dosage, filtration flow rate and raw waters characteristcs. The experimental work was carried out in pilot-plant comprised by a hydraulic flash mixing device and a rapi
Publicado em: 2006
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18. Influence of the contact bed in the efficiency of removal of iron of underground waters / Influência do leito de contato na eficiência de remoção de ferro de águas subterrâneas
Este trabalho teve como objetivo avaliar a influência da unidade leito de contato na eficiência de remoção ferro em Estação de Tratamento de Água (ETA) tipo desferrização que trata água subterrânea. Os ensaios foram realizados em uma instalação piloto, composta por um aerador tipo tabuleiro, um leito de contato de fluxo ascendente e um filtro r�
Publicado em: 2006
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19. Influência das características da camada filtrante e da taxa de filtração na eficiência de remoção de microcystis aeruginosa e microcistina na filtração lenta em areia / Influence of the filter bed characteristics and filtration rate in the removal efficiency of microcystis aeruginosa and microcystin by slow sand filtration
Esta pesquisa teve como objetivo avaliar o desempenho da filtração lenta no que se refere à remoção de células de M.aeruginosa e de microcistina extracelular, buscando a melhoria da eficiência por meio do estudo da influência de alguns parâmetros de projeto e operação. Para tanto, foi utilizada uma instalação piloto de filtração composta por t
Publicado em: 2006
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20. MODELO ESTOCÁSTICO PARA A EXCLUSÃO PELO TAMANHO DURANTE O TRANSPORTE DE SUSPENSÕES PARTICULADAS EM MEIOS POROSOS / STOCHASTIC MODEL FOR SIZE EXCLUSION MECHANISM DURING SUSPENDED PARTICLE SUSPENSION TRANSPORT IN POROUS MEDIUM
Deep bed filtration of water with particles occurs in several industrial and environmental processes like water filtration and soil contamination. In petroleum industry, deep bed filtration occurs near to injection wells during water injection, causing injectivity reduction. It also takes place during well drilling, sand production control, produced water di
Publicado em: 2005
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21. Influencia da redução da espessura da camada suporte na eficiencia da filtração lenta com uso de mantas sinteticas não tecidas para aguas de abastecimento
The purpose of this study was to investigate the influence of the gravel suporter bed replacement for nonwoven synthetic fabrics in slow sand filtration for treating water supplies. The experimental investigation was carried out in a pilot plant built with an upflow roughing filter unit and three slow sand filtration units, which were made by sand (Te = 0,25
Publicado em: 2001
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22. Production of inulinase: recovery and scale-up / Obtenção de inulinase: recuperação e ampliação de escala
It has been observed that the production of extracellular inulinase by Candida kefyr DSM 70106 was markedly affected by the rate of oxygen transfer to the medium. The highest inulinase activity (37,5 U.Ml-1) was attained at a KLa value (volumetric coefficient of oxygen transfer) equal to 43 h-1. As such, KLa was chosen as a criterion for scaling-up the biore
Publicado em: 1995
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23. Reovirus removal and inactivation by slow-rate sand filtration.
Laboratory column studies were conducted at the Utah Water Research Laboratory, Logan, Utah, to evaluate reovirus removal from drinking water supplies by slow-rate sand filtration (SSF). Columns, constructed to simulate a full-scale SSF field operation, were inoculated with reovirus at ca. 1,000-times-greater concentrations than those typically found in dome
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24. Studies on the Biology of Sewage Disposal: A Sprinkling Filter Bed and Its Bacteriological Population 1