Anoxic Process
Mostrando 1-12 de 43 artigos, teses e dissertações.
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1. Remoção simultânea de material orgânico, nitrogênio e fósforo em um reator em bateladas sequenciais com biofilme de leito móvel operado pelo processo anaeróbio-anóxico-óxico
RESUMO Neste estudo, foi avaliado o desempenho de um reator em bateladas sequenciais com biofilme de leito móvel operado pelo processo anaeróbio-anóxico-óxico (A2O), aplicado à remoção simultânea de material orgânico, nitrogênio e fósforo de esgoto sanitário. Utilizaram-se dois reatores com volume útil de 36 L cada, sendo que um deles recebeu an
Eng. Sanit. Ambient.. Publicado em: 06/06/2019
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2. Removal of Beta-Lactams Antibiotics through Zero-Valent Copper Nanoparticles
The removal of the beta-lactam antibiotics (ceftriaxone and cefadroxil) through zero-valent copper nanoparticle (nZVC) was studied in this work. Excellent removal degrees (> 85%) were obtained for both analytes in only 20 min of reaction. Studies were performed in both oxic and anoxic conditions, and in the presence of t-butyl alcohol (TBA), an inhibitor of
J. Braz. Chem. Soc.. Publicado em: 2018-08
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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. Biological nitrogen removal over nitritation/denitritation using phenol as carbon source
A laboratory scale activated sludge sequencing batch reactor was operated in order to obtain total removal of influent ammonia (200; 300 and 500 mg NH3-N.L-1) with sustained nitrite accumulation at the end of the aerobic stages with phenol (1,000 mg C6H5OH.L-1) as the carbon source for denitrifying microorganisms during the anoxic stages. Ammonia removal abo
Brazilian Journal of Chemical Engineering. Publicado em: 2011-06
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5. RemoÃÃo biolÃgica de nitrogÃnio de efluente avÃcola usando reator em batelada sequÃncial
Slaughterhouses and bird cold storage processing plants stand out as large polluters, particularly because of the large amounts of waste rich in organic substances, solids, oils and greases, nutrients, specially nitrogen and phosphorus. Nitrogen compounds removal from wastewater is usually accomplished through biological processes, by nitrification under aer
Publicado em: 2009
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6. Remoção de nitrogênio de lixiviado de resíduos sólidos urbanos por meio do processo nitrificação/desnitrificação via nitrito em reator em bateladas sequenciais / Nitrogen removal from solid waste leachate by nitrification/denitrification via nitrite in a sequencing batch reactor.
The leachate is an effluent with high potential to cause environmental problems in receiving body due to the high concentrations of ammoniacal nitrogen. Currently, several treatment processes have been studied to promote nitrogen removal by the hand of conventional process variations. Therefore, the present study was developed to evaluate the performance of
Publicado em: 2009
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7. Effect of ammonia load on efficiency of nitrogen removal in an SBBR with liquid-phase circulation
The removal of biological nitrogen from a synthetic wastewater with different ammonium nitrogen concentrations (50 and 100 mgN-NH4+/L) by a nitrification and denitrification process using a sequencing batch biofilm reactor (SBBR) with liquid-phase circulation was studied. The system with a total working volume of 4.6 L (3.7 L in the reactor and 0.9 L in the
Brazilian Journal of Chemical Engineering. Publicado em: 2008-06
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8. Utilização do metano como doador de elétrons para remoção de nitrogênio via nitrificação e desnitrificação em reator operado em bateladas seqüenciais / Nitrogen removal by biological nitrification and denitrification using methane as electron donor in a sequencing batch aerobic/anoxic reactor
Nitrogen removal via biological nitrification and denitrification was studied in a sequencing batch reactor submitted to aerate and anoxic periods. Methane was added as electron donor for denitrification in the anoxic periods. Different operational and nutritional conditions referred to as stages in this text were tested aiming to achieve the best nitrogen r
Publicado em: 2008
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9. Aspectos do enchimento da represa Paraitinga, sistema produtor Alto Tietê: zooplâncton e qualidade da água / Aspects of the filling of Paraitinga Reservoir, Sistema Produtor Alto Tietê: zooplankton and water quality
Due to rapid population growth, construction of dams has become indispensable to meet the demand of water needed to supply the entire population and to support the social and economic system. The transformation of a river in an artificial lake not only promotes positive effects, the practice changes permanently the environment in which it is inserted, with h
Publicado em: 2008
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10. Remoção de carbono e nitrogênio em reator de leito móvel submetido à aeração intermitente / Nitrogen and carbon removal in moving bed reactor operated under intermittent aeration
The operating conditions for the combined removal of nitrogen and organic matter in moving- bed biological reactor were investigated. Two bench-scale reactors, two liters each, were operated under intermittent aeration and continuously fed with synthetic wastewater containing ammonia nitrogen (90 to 110 mg/L) and molasses as organic carbon source (COD of 450
Publicado em: 2008
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11. Phenol removal an anaerobic fluidized bed reactor under denitrifying conditions. / Remoção de fenol em reator anaeróbio de leito fluidificado sob condições desnitrificantes
Este trabalho teve como objetivo geral a caracterização de um sistema de tratamento biológico de remoção de fenol em reator anaeróbio de leito fluidificado utilizando o nitrato como aceptor final de elétrons. O reator foi construído em acrílico transparente, com dimensões equivalentes a 190 cm de altura e 5,3 cm de diâmetro interno, totalizando um
Publicado em: 2008
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12. Formação de aldeídos e trialometanos da desinfecção por ozonização, cloração e ozonização/cloração de efluente de tratamento anaeróbio de esgoto sanitário / Aldehydes and trihalomethanes formation from desinfection in ozonization, chloration and, ozonation/chloration in anaerobic effluent from sanitary wastewater
The present work was mostly carried out in Brazil. However, aiming to enhance the research, a six-month data collection was performed at the Wageningen University - the Netherlands. The step carried out in Brazil proposed: to study the formation of by-products (aldehydes and trihalomethanes) from the disinfection of an anaerobic treatment wastewater effluent
Publicado em: 2008