Nitrifying Microorganisms
Mostrando 1-12 de 17 artigos, teses e dissertações.
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1. Assessment of the nitrification process in a culture of pacific white shrimp, using artificial substrate and bacterial inoculum in a biofloc technology system (BFT)
RESUMO: Litopenaeus vannamei é o camarão marinho mais cultivado em todos os tipos de sistemas, incluindo o Sistema de Tecnologia de Bioflocos (BFT). Os bioflocos são formados por microorganismos, entre estes, bactérias autotróficas que são responsáveis pelo processo de nitrificação. Este estudo teve como objetivo identificar e promover o desenvolvi
Cienc. Rural. Publicado em: 16/05/2019
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2. Comunidade bacteriana, atributos do solo e fluxo de gases em solo sob Cerrado e cana-de-açúcar / Bacterial community, soil properties and gas fluxes in a soil under Cerrado and sugarcane
The sugarcane crop plays an important role on Brazilian economy, and is passing through an expansion process concentrated mainly on the Cerrado (savannah) biome (Middle West region of Brazil). In order to understand the influence of sugarcane cultivation and management on soil chemical, physical and biological properties, we studied two sugarcane areas, with
Publicado em: 2010
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3. Caracterização de comunidade microbiana em biofilme associada a filtro biológico para o tratamento de efluente de aquacultura
Na aquacultura de recirculação são utilizados filtros biológicos para o tratamento do efluente antes que este retorne aos tanques. Estas unidades de tratamento têm como finalidade a transformação de nitrogênio amoniacal em nitrato, pois a amônia e o nitrito são tóxicos para os peixes. O nitrogênio amoniacal tende a se acumular na água de cultivo
Publicado em: 2010
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4. Reator de leito expandido em escala plena com zonas anaeróbia e aeróbia sobrepostas: remoção conjunta de matéria orgânica e nutrientes e estudo do comportamento microbiológico do biofilme, por respirometria e microsensor de OD / Full scale expanded bed reactor with overlaid anaerobic and aerobic zones: joint removal of organic matter and nutrients and the study of microbiological biofilm behavior and DO microsensor
The current research aimed the development of a 159 M POT.3total volume biological reactor, with a expanded and partially aerated granular coal bed (activated and anthracite), to promote organic matter and nutrients (N and P) removal from wastewater due to the maintenance of anaerobic and aerobic environments, stratified throughout the height of the reactor
Publicado em: 2007
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5. Otimização tecnológica de estações de tratamento biológico (ETB) de águas residuárias de coqueria
The treatment of effluents in a coke industry occurs generally by activated sludge process. The operation and efficiency of the process depends on a large number of factors including chemical composition, quantity of the effluents, mass and composition of the activated sludge, environmental temperature, precipitation, solar radiation, dissolved oxygen, and h
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/05/2005
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6. Anaerobic ammonium oxidation in a bioreactor treating slaughterhouse wastewater
Ammonium oxidation was thought to be an exclusively aerobic process; however, as recently described in the literature, it is also possible under anaerobic conditions and this process was named ANAMMOX. This work describes the operation of a system consisting of a denitrifying reactor coupled to a nitrifying reactor used for removal of nitrogen from slaughter
Brazilian Journal of Chemical Engineering. Publicado em: 2005-12
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7. Comparative analysis of nitrifying bacteria associated with freshwater and marine aquaria.
Three nucleic acid probes, two for autotrophic ammonia-oxidizing bacteria of the beta subdivision of the class Proteobacteria and one for alpha subdivision nitrite-oxidizing bacteria, were developed and used to study nitrifying bacterial phylotypes associated with various freshwater and seawater aquarium biofilters. Nitrosomonas europaea and related species
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8. Production of Nitrous Oxide by Ammonia-Oxidizing Chemoautotrophic Microorganisms in Soil †
Gas chromatographic studies showed that nitrous oxide was produced in each instance when sterilized (autoclaved) soil was incubated after treatment with ammonium sulfate and inoculation with pure cultures of ammonia-oxidizing chemoautotrophic microorganisms (strains of Nitrosomonas, Nitrosospira, and Nitrosolobus). Production of N2O in ammonium-treated steri
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9. Nitrification in the intertidal zone: influence of effluent type and effect of tannin on nitrifiers.
Nitrification by intertidal sediments was measured by using a tide simulator that approximated the cycle of seawater on tidal flats. Sediments were chosen from sites affected by industrial and municipal effluents and pastoral seepage and runoff. The ability of sediments from different sites to nitrify endogenous nitrogen varied markedly. All sites exhibited
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10. Nitrifying Bacteria in Wastewater Reservoirs
Deep wastewater reservoirs are used throughout Israel to store domestic wastewater effluents for summer irrigation. These effluents contain high concentrations of ammonia (≤5 mM) that are frequently toxic to photosynthetic microorganisms and that lead to development of anoxic conditions. Population dynamics of nitrifying bacteria and rates of nitrification
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11. Nitrification at Low pH by Aggregated Chemolithotrophic Bacteria
A study was performed to gain insight into the mechanism of acid-tolerant, chemolithotrophic nitrification. Microorganisms that nitrified at pH 4 were enriched from two Dutch acid soils. Nitrate production in the enrichment cultures was indicated to be of a chemolithoautotrophic nature as it was (i) completely inhibited by acetylene at a concentration as low
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12. Morphological Survey of Microbial Mats Near Deep-Sea Thermal Vents †
A microscopic survey is presented of the most commonly observed and morphologically conspicuous microorganisms found attached to natural surfaces or to artificial materials deposited in the immediate vicinity of thermal submarine vents at the Galapagos Rift ocean spreading zone at a depth of 2,550 meters. Of special interest were the following findings: (i)