Anaerobic Aerobic Anoxic
Mostrando 1-12 de 39 artigos, teses e dissertações.
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1. NUTRIENT REMOVAL FROM SWINE WASTEWATER IN A COMBINED VERTICAL AND HORIZONTAL FLOW CONSTRUCTED WETLAND SYSTEM
ABSTRACT This study aimed to assess the performance of a combined vertical flow (VFCW) and horizontal subsurface-flow (HFCW) constructed wetland systems built on a pilot scale and submitted to different configurations and organic load application rates of pre-treated swine wastewater (SWW) in anaerobic systems on the nitrogen and phosphorus removal. The aver
Eng. Agríc.. Publicado em: 2018-06
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2. 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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3. 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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4. 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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5. 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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6. Desenvolvimento e avaliação de sistema de leito fixo reator misto radial seguido de reator anóxico horizontal, para remoção de matéria orgânica e de nitrogênio de esgoto sanitário / Immobilized bed system development and evaluation radial mixed reactor followed by horizontal-flow anoxic reactor for organic matter and nitrogen reduction in domestic wastewater
Os sistemas combinados anaeróbio/aeróbio, para tratamento de água residuária, têm sido considerados alternativas viáveis do ponto de vista técnico-econômico em relação aos sistemas tradicionais. Este trabalho consiste no desenvolvimento de nova configuração para um sistema, com dois reatores operados seqüencialmente, composto por Reator Misto Ra
Publicado em: 2003
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7. Pós-tratamento de efluente de reator UASB em sistema de lodos ativados visando a remoção biológica do nitrogênio associada à remoção físico-química do fósforo. / Association of biological removal of nitrogen and physical-chemical of phosphorus by means of activated sludge post-treatment of UASB reactor effluent.
In this research work a pilot-scale, activated sludge plant was operated to treat the treated effluent of an anaerobic treatment system, in order to remove nitrogen and phosphorus. The pilot unit was composed of anoxic reactor, aerobic reactor and secondary settler. The experiments were carried out while keeping both the affluent and return sludge flow rates
Publicado em: 2003
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8. Atypical Polyphosphate Accumulation by the Denitrifying Bacterium Paracoccus denitrificans
Polyphosphate accumulation by Paracoccus denitrificans was examined under aerobic, anoxic, and anaerobic conditions. Polyphosphate synthesis by this denitrifier took place with either oxygen or nitrate as the electron acceptor and in the presence of an external carbon source. Cells were capable of poly-β-hydroxybutyrate (PHB) synthesis, but no polyphosphate
American Society for Microbiology.
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9. Regulation of cobalamin biosynthetic operons in Salmonella typhimurium.
Transcription of cobalamin (cob) biosynthetic genes in Salmonella typhimurium is repressed by cobalamin and by molecular oxygen. These genes seem to be subject to catabolite repression, and they are maximally expressed under conditions of anaerobic respiration of glycerol-fumarate. A 215-fold increase in the expression of cob genes occurs when S. typhimurium
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10. Use of 31P nuclear magnetic resonance spectroscopy and electron microscopy to study phosphorus metabolism of microorganisms from wastewaters.
We used 31P nuclear magentic resonance to study the transfer of phosphorus between Pis and polyphosphates in microorganisms involved in wastewater treatment. We showed that the transfer process is reversible and of the first order in accordance with the polyphosphate concentration. The presence of nitrates in the anoxic phase led to results similar to those
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11. Aerobic and Anaerobic Catabolism of Vanillic Acid and Some Other Methoxy-Aromatic Compounds by Pseudomonas sp. Strain PN-1
Vanillic acid (4-hydroxy-3-methoxybenzoic acid) supported the anaerobic (nitrate respiration) but not the aerobic growth of Pseudomonas sp. strain PN-1. Cells grown anaerobically on vanillate oxidized vanillate, p-hydroxybenzoate, and protocatechuic acid (3,4-dihydroxybenzoic acid) with O2 or nitrate. Veratric acid (3,4-dimethoxybenzoic acid) but not isovani
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12. Growth and survival of Serratia marcescens under aerobic and anaerobic conditions in the presence of materials from blood bags.
Several patients receiving blood transfusions during the summer of 1991 developed bacteremia after the transfusion. In all cases, the infection was caused by Serratia marcescens. The same strain of Serratia marcescens was isolated from the patients and from the outer surface of unfilled blood bags. The transport containers for the blood bags were made anoxic