Biofiltration
Mostrando 1-12 de 14 artigos, teses e dissertações.
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1. Biofiltration of a styrene/acetone vapor mixture in two reactor types under conditions of styrene overloading
This aim of study was to compare the performance of a biofilter (BF) and trickle bed reactor (TBR) under increased styrene loading with a constant acetone load, 2 gc/m3/h. At styrene loading rates up to 30 gc/m3/h, the BF showed higher styrene removal than TBR. However, the BF efficiency started to drop beyond this threshold loading and could never reach ste
Braz. arch. biol. technol.. Publicado em: 2014-10
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2. Biofiltration of volatile organic compounds of Brazilian gasoline
Gasoline vapors pollute the atmosphere and can be harmful to human and animal health. Tons of particles of this pollutant are expelled to the atmosphere, generating great economic losses to the industries and serious damage to the environment. Biofiltration is an option of simple technology with low costs that can be used for the gasoline vapor treatment. Th
Braz. arch. biol. technol.. Publicado em: 2014-02
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3. Study on biofiltration capacity and kinetics of nutrient uptake by Gracilaria cervicornis (Turner) J. Agardh (Rhodophyta, Gracilariaceae)
The absorption efficiency and kinetic parameters (Vmax, Ks and Vmax:Ks) of the seaweed Gracilaria cervicornis for the nutrients NH4+, NO3- and PO4(3-) were evaluated. Absorption efficiency was measured by monitoring nutrient concentrations for 5 h in culture media with initial concentrations of 5, 10, 20 and 30µM. Kinetic parameters were determined by using
Revista Brasileira de Farmacognosia. Publicado em: 06/05/2011
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4. MACRÓFITAS AQUÁTICAS NA REMOÇÃO DE MICROCISTINAS / MACRÓFITAS AQUÁTICAS NA REMOÇÃO DE MICROCISTINAS
As cianobactérias são microrganismos que fazem parte do fitoplâncton natural principalmente de água doce. A proliferação excessiva destes organismos (floração) tem sido relacionada à fatores como a eutrofização dos corpos dágua e o aumento da temperatura global. Várias espécies podem produzir toxinas, como as microcistinas, que representam risc
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/02/2009
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5. Styrene biofiltration in a trickle-bed reactor
The biological treatment of styrene waste gas in a trickle-bed filter (TBF) was investigated. The bioreactor consisted of a two-part glass cylinder (ID 150 mm) filled with 25 mm polypropylene Pall rings serving as packing material. The bed height was 1m. Although the laboratory temperature was maintained at 22 ºC, the water temperature in the trickle-bed fi
Brazilian Archives of Biology and Technology. Publicado em: 2008-04
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6. Avaliação da utilização de diferentes materiais suporte na biofiltração de sulfeto de hidrogênio / Utilization of different packing materials in the hydrogen sulfide biofiltration
O sulfeto de hidrogênio é um gás que pode causar os mais diversos danos se lançado ao meio ambiente devido, principalmente, à sua elevada toxicidade, corrosividade, odores indesejáveis e alta demanda de oxigênio. Atualmente existem diferentes processos físico-químicos estabelecidos para o tratamento desse composto, entretanto são consideradas técn
Publicado em: 2008
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7. Start-up and performance characteristics of a trickle bed reactor degrading toluene
The objective of this work was to evaluate toluene degradation in a trickle bed reactor when the loading was carried out by changing the air flow rate. The biofiltration system was inoculated with a mixed microbial population, adapted to degradation of hydrophobic compounds. Polypropylene high flow rings were used as a packing material. The system was operat
Brazilian Archives of Biology and Technology. Publicado em: 2007-09
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8. 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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9. Impact of biocatalyst and moisture content on toluene/xylene mixture biofiltration
The objective of this work was to determine the influence of microbial inoculation on degradation efficiency. Three biofilters were used for the treatment of waste gas. A mixture of compost and perlite (8:2) served as the packing material. One biofilter was inoculated with a constructed microbial population. The second remained uninoculated, having the natur
Brazilian Archives of Biology and Technology. Publicado em: 2006-11
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10. Impact of biocatalyst and moisture content on toluene/xylene mixture biofiltration
O objetivo deste trabalho foi determinar a influência da inoculação microbiana na eficiência da degradação. Três biofiltros foram utilizados no tratamento do gás residuais. Uma mistura de composto e perlite na proporção (8:2) serviu como o material de empacotamento dos biofiltros. Um biofiltro foi inoculado com uma população microbial selecionada
Brazilian Archives of Biology and Technology. Publicado em: 2006-03
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11. Concepção e estudo de um biofiltro para tratamento de compostos orgânicos voláteis COVs
In the last decade, biological purification of gaseous waste has become an important alternative to many conventional methods of exhaust air treatment. More recently, biofiltration has proved to be an effective and inexpensive method for the treatment of air contaminated with volatile organic compounds (VOCs). A biofilter consists in a reactor packed with a
Publicado em: 2005
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12. Assessment of Changes in Microbial Community Structure during Operation of an Ammonia Biofilter with Molecular Tools
Biofiltration has been used for two decades to remove odors and various volatile organic and inorganic compounds in contaminated off-gas streams. Although biofiltration is widely practiced, there have been few studies of the bacteria responsible for the removal of air contaminants in biofilters. In this study, molecular techniques were used to identify bacte
American Society for Microbiology.