Denitrifying Bacteria
Mostrando 1-12 de 101 artigos, teses e dissertações.
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1. Temporal variation of bacterial population and response to physical and chemical parameters along a petrochemical industry wastewater treatment plant
Abstract: The petrochemical industry has played a considerable role in generation and release of waste in the environment. Activated sludge and facultative lagoons are commonly used for domestic and industrial wastewater treatment due to their low-cost and minimal need for operational requirements. Microorganisms present in wastewater treatment plant (WWTP)
An. Acad. Bras. Ciênc.. Publicado em: 01/07/2019
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2. Evaluation of the microbial diversity in sequencing batch reactor treating linear alkylbenzene sulfonate under denitrifying and mesophilic conditions using swine sludge as inoculum
The objective of this study was to evaluate the degradation of Linear Alkylbenzene Sulfonate (LAS) in anaerobic sequencing batch reactor (ASBR) under denitrifying conditions using swine sludge as inoculum. The reactor was operated for 104 days with synthetic substrate containing nitrate, and LAS was added later (22 mg/L). Considering the added mass of the LA
Braz. arch. biol. technol.. Publicado em: 06/03/2015
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3. Evaluation of the microbial diversity of denitrifying bacteria in batch reactor
Microbial communities in an industrial activated sludge plant may contribute to the denitrification process, but the information on the microorganisms present in denitrifying reactors is still scarce. Removal of inorganic nitrogen compounds can be accomplished by the addition of carbon sources to the biological process of denitrification. Ethanol is an econo
Braz. J. Chem. Eng.. Publicado em: 2013-09
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4. Microbial diversity associated with the use of sulfide as electron donor for nitrogen removal from wastewater of reactors applied to anaerobic treatment of sewage / Diversidade microbiana associada ao uso de sulfeto como doador de elétrons para a remoção de nitrogênio de efluentes de reatores anaeróbios aplicados ao tratamento de esgotos sanitários
The widespread nitrate contamination in concentrations higher than recommended by legislation has raised interest in technologies for water and wastewater treatment. Biological nitrogen removal is relatively low cost and higher efficiency. Sulfide as electron donor can be oxidized to elemental sulfur or sulfate by sulfide oxidizing bacteria that can use nitr
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/08/2012
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5. A performance study of simultaneous microbial removal of no and SO2 in a biotrickling-filter under anaerobic condition
The behaviors of simultaneous removal of NO and SO2 using the coculture of anaerobic denitrifying bacteria and sulfate reducing bacteria was investigated in a bench-scale biotrickling-filter. When the combined NO/SO2 removal biotrickling-filter was operated at an empty bed residence time of 76 s with NO and SO2 feed concentrations of 2 and 2 g/m3, respective
Brazilian Journal of Chemical Engineering. Publicado em: 2011-06
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6. 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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7. Enriquecimento de consórcios microbianos em quimiostatos sob condições anammox / Enrichment of microbial trusts in chemostats with anammox conditions
This research aimed to enrich and to purify, in chemostats, microbial trusts capable to realize ammonium oxidation to dinitrogen (N IND.2) under anaerobic conditions, using as inoculum: (Q1) biomass from nitrifying-denitrifying reactor of wastewater treatment plant of amino-acids industry (Ajinomoto) and (Q2) granular sludge from upflow anaerobic sludge blan
Publicado em: 2007
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8. 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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9. Caracterização microbiológica de cultura desnitrificante de reator anaeróbio horizontal de leito fixo utilizado na remoção de BTEX / Microbiologic characterization of anaerobic packed-bed reactor denitrifying culture used for BTEX removal
The monoaromatic hydrocarbons known as BTEX (benzene, toluene, ethylbenzene, and xylene) are among the greatest environmental pollution problems. These compounds are known by their recalcitrance in anoxic environments, and the removal of these toxics from anaerobic contaminated sites depends on the presence of an adapted microbial population capable of to pr
Publicado em: 2005
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10. Isolation and Characterization of Diverse Halobenzoate-Degrading Denitrifying Bacteria from Soils and Sediments
Denitrifying bacteria capable of degrading halobenzoates were isolated from various geographical and ecological sites. The strains were isolated after initial enrichment on one of the monofluoro-, monochloro-, or monobromo-benzoate isomers with nitrate as an electron acceptor, yielding a total of 33 strains isolated from the different halobenzoate-utilizing
American Society for Microbiology.
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11. Aerobic and anaerobic growth of rifampin-resistant denitrifying bacteria in soil.
The growth and survival of several rifampin-resistant isolates of denitrifying bacteria were examined under anaerobic (denitrifying) and aerobic conditions. Two isolates added to nonsterile Bruno soil at densities of between 10(4) and 10(6) CFU g dry soil-1 exhibited an initial period of growth followed by a gradual decline in numbers. After 28 days, both is
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12. Development of PCR Primer Systems for Amplification of Nitrite Reductase Genes (nirK and nirS) To Detect Denitrifying Bacteria in Environmental Samples
A system was developed for the detection of denitrifying bacteria by the amplification of specific nitrite reductase gene fragments with PCR. Primer sequences were found for the amplification of fragments from both nitrite reductase genes (nirK and nirS) after comparative sequence analysis. Whenever amplification was tried with these primers, the known nir t
American Society for Microbiology.