Hydraulic Detention Time
Mostrando 13-22 de 22 artigos, teses e dissertações.
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13. Avaliação da eficiência da remoção de matéria orgânica e microbiológica de três sistemas de lagoas de estabilização em série na Grande Natal-RN: Beira Rio, Jardim Lola I e Jardim Lola II
Waste stabilization ponds are the main technology in use for domestic sewage treatment in Rio Grande do Norte State (RN), northeast Brazil. The are around 80 systems, constructed mainly by municipal city halls, being series comprised by a primary facultative pond followed by two maturation ponds the most used configuration. Due to problems related with the p
Publicado em: 2006
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14. Avaliação da influência da distribuição de tamanho de partículas e do binômio velocidade/tempo de detenção na zona de reação no desempenho da flotação com emprego de sonda ultra-sônica e de técnica de análise por imagem / Analysis of particles distribution size and the pair velocity/hydraulic residence time in the reaction zone performance of a flotation unit by using ultrasonic probe and image analysis
This work investigated the performance of a dissolved air flotation (DAF) pilot plant, used to treat drinking water containing 05 Tu and 50 Cu. The particles (micro-bubbles and flocs) and hydraulic characteristics were taken into account. The focus was given in the reaction zone as hypothesized by Realis mathematic model (REALI, 1991). An image analyses was
Publicado em: 2005
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15. Avaliação de partículas poliméricas como material suporte em reator anaeróbio de leito fluidizado no tratamento de fenol.
This work had as objective studies of the biofilms formation in polymerics particles used as material supports in anaerobic fluidized-bed reactors. Three polymerics supports were tested: polystyrene, PET and PVC, which suffered appropriate acid treatment, in way to provide them superficial characteristics as rugosity, porosity and favorable electric charge,
Publicado em: 2005
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16. Avaliação do uso da banda de rodagem de pneus inservíveis triturada como suporte ao desenvolvimento de biofilmes em um reator anaeróbio de leito expansível / Granulated tread of scrap tires as support for the development of biofilms in an expanded bed anaerobic reactor
The present research had as objective the assessment of granulated tread of scrap tires (GTST) as support for the development of biofilms in an expanded bed anaerobic reactor (EBAR), in full scale, with a total volume of 32m3, employed for wastewater treatment. The use of this material as support was presented as an innovating proposal, with a high applicati
Publicado em: 2005
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17. Evaluation of the anaerobic biodegradability of sewage sludge stabilized by anaerobic reactors / Avaliação da biodegradabilidade anaerobia de lodos de esgoto provenientes de reatores anaerobios sequenciais
The potential of applicability of an anaerobic process can be evaluated from the knowledge of some characteristics of the residues to be treated. A preliminary evaluation of these characteristics can assist in the choice of a more suitable treatment system, what allows to estimate the production of biological solids, requirements for nutrients, methane produ
Publicado em: 2005
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18. Influência da recirculação de percolado em sistemas de batelada de uma fase e híbrido na digestão da fração orgânica de resíduos sólidos urbanos / Influency of leachate recirculation in batch and one-phase reactors to anaerobic digestion of organic fraction of urban solid waste
This thesis studied the influence of the leachate recirculation, adjusting to the best rates and frequencies, for degradation of the organic fraction of the urban solid wastes, in one and two-phases (hybrid) system. Bioreactors of 3.45 L were used and filled out with OFMSW pattern, leachate as seed and an anaerobic filter as methanogenic reactor. The perform
Publicado em: 2004
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19. Performance and microbial characterization of the two stage process with upflow anaerobic sludge blanket reactors (UASB) treating swine wastewater / Desempenho e caracterização microbiana do processo de dois estágios com reatores anaeróbios de fluxo ascendente com manta de lodo (UASB) tratando águas residuárias de suinocultura
Two bench scale UASB reactors (volumes of 39,0 and 10,5 L) were operated in sequence, fed with swine wastewater with total suspended solids (TSS) concentration around 5000 mg/L in the first reactor, with controlled temperature (from 25 to 30 Celsius degrees) and operating with hydraulic detention time (HDT) in the first reactor varying from 62 to 16 h and in
Publicado em: 2004
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20. Photocatalytic inactivation of Clostridium perfringens and coliphages in water
This study presents results of the photocatalytic inactivation of two groups of microorganisms: spores of the anaerobic bacterium Clostridium perfringens and coliphage. A cylindrical reactor impregnated with titanium dioxide and irradiated with ultraviolet light (15 W) was used. Parameters such as color, turbidity, hydraulic detention time (HDT) and initial
Brazilian Journal of Chemical Engineering. Publicado em: 2003-10
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21. Tratamento de efluente liquido da industria citrica por lodo ativado por batelada )LAB) : tratabilidade e microbiologia
The aim of this study, in pilot scale of laboratory, was to verify the applicability of the Activated Sludge Process (SRB) on the wastewaters treatment ofthe processing of citric fruits, as well as to determine the rnicrobiological characteristics ofthe sludge and to study the by-products formed for this wastewater. For this purpose two reactors were built i
Publicado em: 2000
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22. Avaliação do desempenho de filtros anaerobicos com diferentes meios de enchimento no tratamento de esgotos sanitarios
The general objetive of this study was the application of the upflow anaerobic filter to the treatment of sanitary wastewater. Efficiency was verified through the utilization of the three different packing media: pall-rings, rocks, and bamboo rings. The especific objetive was to evaluate an alternative system for wastewater treatment, utilizing a low cost pa
Publicado em: 1998