Autotrophic Denitrification
Mostrando 1-12 de 13 artigos, teses e dissertações.
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1. Lodo ativado com aeração prolongada operado sob baixa concentração de oxigênio dissolvido: comportamento cinético das bactérias heterotróficas e autotróficas nitrificantes
RESUMO Este trabalho teve como objetivo a determinação dos parâmetros cinéticos que descrevem o crescimento das bactérias heterotróficas e autotróficas nitrificantes em três sistemas de lodos ativados com aeração prolongada, operados com baixa aeração, a fim de se obter a remoção de nitrogênio de esgoto sanitário pelo processo de nitrificaç�
Eng. Sanit. Ambient.. Publicado em: 25/11/2019
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2. Desnitrificação autotrófica com o uso de sulfeto e integração com o processo de nitrificação em um único reator / Autotrophic denitrification with sulphide and the use of integration with the process of nitrification in a single reactor
A remoção de nitrogênio acoplada à oxidação de sulfeto pode ser uma opção adequada para o pós-tratamento de efluentes de reatores anaeróbios, os quais contêm nitrogênio amoniacal, que deve ser nitrificado, e sulfeto, que poderia ser utilizado como doador de elétrons endógeno para a desnitrificação autotrófica. Com base nessa constatação, e
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/03/2012
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3. Nitrificação e desnitrificação simultânea em reator com biomassa em suspensão e fluxo contínuo de esgoto / Simultaneous nitrification and denitrification in reactor with biomass in suspension and continuous flow of sewage
It was developed in Europe the process known as Simultaneous Nitrification and Denitrification (SND) in activated sludge that operates with a SRT, high enough for nitrification to occur, even with low concentration of dissolved oxygen in the aeration tanks. Such situation in the tanks is possible to maintain anoxic conditions inside the flocs and to have the
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/07/2011
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4. Remoção de matéria orgânica carbonácea e nitrogênio em Reator Aeróbio-Anóxico de Leito Fixo (RAALF) aplicado ao pós-tratamento de efluente de reator anaeróbio / Removal of carbonaceous organic matter and nitrogen in an Aerobic-Anoxic Fix Bed Reactor (AAFBR) applied to the tertiary treatment of domestic wastewater
This work presents the Aerobic-Anoxic Fix Bed Reactor (AAFBR), with superimposed chambers, as an alternative concerning the post-treatment of anaerobic reactors efiluents aiming the removal of carbonaceous organic matter and nitrogen. Polyurethane foam cubic matrices (5 mm) were used packing material. Hydrodynamic essays were carried out in order to obtain t
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/07/2011
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5. Desnitrificação autotrófica usando sulfeto como doador de elétrons para remoção de nitrogênio de efluentes de reatores anaeróbios utilizados no tratamento de esgotos sanitários / Autotrophic denitrification using sulfide as electron donor for nitrogen removal from anaerobically pre-treated domestic sewage
A remoção de nitrogênio é um aspecto importante do tratamento de águas residuárias, visto que este nutriente causa diversos inconvenientes, com consequentes danos à saúde humana e ao meio ambiente. A forma mais utilizada para a remoção biológica de nitrogênio de águas residuárias é a nitrificação autotrófica seguida de desnitrificação het
Publicado em: 2011
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6. Isolation and characterization of a microorganism involved on autotrophic denitrification by sulfide oxidation in a vertical fixed-bed reactor / Isolamento e caracterização de microrganismo envolvido na desnitrificação autrófica pela oxidação de sulfeto em reator vertical de leito fixo
The aim of this study was to evaluate the community involved on autotrophic denitrification by sulfide oxidation applied to the post-treatment of anaerobic effluents. The enrichment of the bacterial community and autotrophic denitrifier community was accessed in three immobilized bed reactors operated at the conditions of autotrophic reduction of nitrate, au
Publicado em: 2010
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7. Utilização de sulfeto como doador de elétrons para a desnitrificação autotrófica aplicada ao tratamento de esgoto sanitário / Utilization of sulfide as electron donor in autotrophic denitrification applied to treatment of domestic sewage
The feasibility of autotrophic denitrification of effluent from anaerobic reactor treating domestic sewage using sulfide as electron donor was evaluated. Prior researches reveals sulfide into liquid phase of effluents and biogas can be utilized as electron donor for denitrification. However, information about the interaction between carbon, nitrogen and sulf
Publicado em: 2009
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8. Ammonium Removal by the Oxygen-Limited Autotrophic Nitrification-Denitrification System
The present lab-scale research reveals the potential of implementation of an oxygen-limited autotrophic nitrification-denitrification (OLAND) system with normal nitrifying sludge as the biocatalyst for the removal of nitrogen from nitrogen-rich wastewater in one step. In a sequential batch reactor, synthetic wastewater containing 1 g of NH4+-N liter−1 and
American Society for Microbiology.
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9. Microscale Distribution of Nitrification Activity in Sediment Determined with a Shielded Microsensor for Nitrate
Microprofiles of O2 and NO3- were measured simultaneously in freshwater sediment with microsensors which were completely free from electrical interference because of coaxial designs. Depth profiles of nitrification (NO3- production) and denitrification (NO3- consumption) were subsequently determined by computer simulation of the measured microprofiles. The n
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10. Relative Rates of Nitric Oxide and Nitrous Oxide Production by Nitrifiers, Denitrifiers, and Nitrate Respirers
Biogenic emissions of nitric and nitrous oxides have important impacts on the photochemistry and chemistry of the atmosphere. Although biogenic production appears to be the overwhelming source of N2O, the magnitude of the biogenic emission of NO is very uncertain. In soils, possible sources of NO and N2O include nitrification by autotrophic and heterotrophic
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11. Autotrophic, Hydrogen-Oxidizing, Denitrifying Bacteria in Groundwater, Potential Agents for Bioremediation of Nitrate Contamination
Addition of hydrogen or formate significantly enhanced the rate of consumption of nitrate in slurried core samples obtained from an active zone of denitrification in a nitrate-contaminated sand and gravel aquifer (Cape Cod, Mass.). Hydrogen uptake by the core material was immediate and rapid, with an apparent Km of 0.45 to 0.60 μM and a Vmax of 18.7 nmol cm
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12. A comparison of NO and N2O production by the autotrophic nitrifier Nitrosomonas europaea and the heterotrophic nitrifier Alcaligenes faecalis.
Soil microorganisms are important sources of the nitrogen trace gases NO and N2O for the atmosphere. Present evidence suggests that autotrophic nitrifiers such as Nitrosomonas europaea are the primary producers of NO and N2O in aerobic soils, whereas denitrifiers such as Pseudomonas spp. or Alcaligenes spp. are responsible for most of the NO and N2O emission