Intermittent Aeration
Mostrando 1-9 de 9 artigos, teses e dissertações.
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1. EFFECT OF AERATION AND RECIRCULATION IN THE REMOVAL OF NITROGEN AND CHEMICAL OXYGEN DEMAND FROM SANITARY SEWAGE IN A STRUCTURED BED REACTOR
ABSTRACT This study aimed to evaluate a structured bed reactor with intermittent aeration in the simultaneous removal of Chemical Oxygen Demand (COD) and Total Nitrogen (TN) from sanitary sewage. The reactor was operated for 339 days with a Hydraulic Retention Time (HRT) of 12 hours, temperature of 30 ± 1°C and continuous feeding. Nine trials were carried
Eng. Agríc.. Publicado em: 2017-12
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2. Nutrient Biological Removal in an Up-flow Sludge Bed Reactor under Intermittent Aeration using Glycerol as the Sole Carbon Source
Abstract This work evaluated the feasibility of glycerol as the sole carbon source for nutrient biological removal in an intermittently aerated bioreactor. The reactor operation was divided into two phases: the first one aimed only at removing nitrogen; and the second one aimed at removing nitrogen and phosphorus. In the first operational phase, three C/N (C
Braz. J. Chem. Eng.. Publicado em: 2017-10
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3. BIODEGRADATION OF EFFLUENT CONTAMINATED WITH DIESEL OIL AND GASOLINE USING CHITOSAN AS A NATURAL COAGULANT IN A CONTINUOUS PROCESS
Abstract This study evaluated the effects of aeration (constant aeration, intermittent aeration and a lack of aeration) and hydraulic retention time (HRT) (2, 3 and 4 days) on a continuous process with cell recycling, using chitosan as a natural coagulant for the sedimentation of a C1 mixed culture. This culture was used for the biodegradation of hydrocarbon
Braz. J. Chem. Eng.. Publicado em: 2016-12
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4. Nitrous oxide emissions from an intermittent aeration activated sludge system of an urban wastewater treatment plant
This study investigated the emission of N2O during the sequential aerated (60-min) and non-aerated (30-min) stages of an intermittent aeration cycle in an activated sludge wastewater treatment plant (WWTP). N2O emission occurred during both stages; however, emission was much higher during aeration. Air stripping is the major factor controlling transfer of N2
Quím. Nova. Publicado em: 2013
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5. Desempenho de um reator vertical de fluxo contínuo e leito estruturado com recirculação do efluente, submetido à aeração intermitente, na remoção de carbono e nitrogênio de um efluente sintético / Performance of vertical reactor of continuous flow and bed structured with recirculation, submitted to intermittent aeration for the removal of carbon and nitrogen from a synthetic effluent
Essa pesquisa teve como objetivo principal avaliar o desempenho de um reator de leito estruturado e fluxo contínuo, sob diferentes condições operacionais como aeração intermitente e recirculação do efluente, na remoção biológica de carbono e nitrogênio de uma água residuária sintética. Foi utilizado um reator vertical, construído em acrílico,
Publicado em: 2011
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6. 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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7. Biotratamento de efluente contaminado por hidrocarbonetos de petróleo
O presente trabalho avaliou a capacidade de biodegradação aeróbia de hidrocarbonetos presentes em efluente contaminado por óleo diesel e gasolina, empregando culturas puras (Pseudomonas aeruginosa ATCC 10145, Pseudomonas aeruginosa ATCC 9027, Pseudomonas aeruginosa PATC) e mista (C1). Após a adaptação destas culturas ao efluente contaminado (com corre
Publicado em: 2008
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8. Remoção de nitrogênio de águas residuárias com elevada concentração de nitrogênio amoniacal em reator contendo biomassa em suspensão operado em bateladas seqüenciais e sob aeração intermitente / Nitrogen removal of wastewaters with high ammonium nitrogen concentrations in reactor containing suspended biomass operated in sequential batch and under intermittent aeration
O reator em batelada seqüencial com biomassa em suspensão foi submetido a concentrações de N-amoniacal de 125, 250 e 500 mg N/L e em condições de oxigênio dissolvido (OD) no reator de 2 mg O IND.2 /L, em ciclos de 2h/2h de anóxico/aeróbio. Em todas as fases, o reator foi operado como batelada alimentada. Na condição de 125 mg N/L obteve-se eficiê
Publicado em: 2006
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9. Nitrogen removal through nitrite in sequential batch reactor with immobilized biomass and intermittent aeration / Remoção de nitrogênio via nitrito em reator operado em bateladas seqüenciais contendo biomassa imobilizada e aeração intermitente
Um reator de leito fixo, preenchido com biomassa imobilizada em espuma de poliuretano, foi operado em bateladas seqüenciais, alimentado com substrato sintético com concentração de nitrogênio amoniacal de 125, 250, 500 e 40 mg/L. O principal objetivo da pesquisa foi verificar a possibilidade de se promover a nitrificação curta no reator submetido à ae
Publicado em: 2005