Extended Aeration
Mostrando 1-12 de 12 artigos, teses e dissertações.
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1. 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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2. Treatment of industry wastewater from a plastic containers (containing originally lubricant oil) recycling industry : biological and physical-chemical process / Tratamento de efluentes de uma industria de reciclagem de embalagens plasticas de oleos lubrificantes : processo biologico e fisico-quimico
In the present work, the treatment of the wastewater originated in a plastic container (containing originally lubricant oil) recycling industry was investigated. The purpose of this work was to study the individual efficiency to treat the industrial effluent, mixture of the plastic container washing process wastewater and sanitary wastewater, by activated sl
Publicado em: 2007
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3. Effects of the accepting water treatment plants (WTP) residuals at wastewater treatment plant (WWTP) using SBR activated-sludge process with extended aeration in the city of Juquitiba, SP. / Efeitos do recebimento do lodo da estação de tratamento de água pelo sistema de tratamento de esgoto por lodo ativado em bateladas e aeração prolongada do município de Juquitiba - SP.
There are different technical engineering solutions for the treatment and final disposal of water treatment plants (WTPs) residuals. Discharge of WTP residual to a wastewater treatment plant (WWTP) is a technical solution in evidence. Therefore, the purpose of this study was to evaluate the capacity of the WWTP using sequencing batch reactor (SBR) activated-
Publicado em: 2007
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4. Atendimento de aspectos legais de um sistema de tratamento de esgoto doméstico quanto ao lançamento do efluente tratado em curso dágua, Classe 2 / Legal compliance for a domestic sewage treatment pant discharging treated efluent in a class 2 receiving stream
Neste estudo foi abordada a legislação ambiental para aprovação de loteamentos no Estado de São Paulo. Foram verificadas também, a sistemática de ocupação dos loteamentos, a medição do consumo real de água por habitante e a taxa de retorno de água, para quantificar a vazão real do esgoto a ser tratado. Analisou-se uma estação de tratamento de
Publicado em: 2005
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5. Degradação de solos cultivados ao longo de uma sequencia topografica, em Bariri (SP)
During the present work, some pedological alterations resulting from traditional soil management methods, were studied after extended planting cycles, on a farm in Bariri County, São Paulo. A topographic sequence was established to evaluate the importance of relief soil position for the modifications of its physical, chemical and biological attributes. Fiel
Publicado em: 2001
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6. Low-temperature stability of viruses in sludges.
Enteroviruses survived for up to 38 days without diminishing in numbers in extended-aeration sludges maintained at 5 degrees C. In oxidation ditch sludges similarly maintained, enteroviruses survived for up to 17 days without diminishing in numbers. The pHs of the sludges in this study were well inside the pH 6 to 8 corridor in which destruction of enterovir
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7. Production of Staphylococcal Enterotoxins A, B, and C Under Conditions of Controlled pH and Aeration
The production of enterotoxins A, B, and C by nine strains of Staphylococcus aureus has been studied under controlled conditions in a fermenter. The strain to strain differences between staphylococci producing a specific enterotoxin were very marked. Increasing aeration in shake flasks improved both growth and production of all extracellular proteins measure
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8. Sporulation of Bacillus stearothermophilus
A broth medium containing tryptone and manganese sulfate supported heavy sporulation of Bacillus stearothermophilus ATCC 7953 (NCA 1518) and four isolates identified as B. stearothermophilus. Maximal spore yields were obtained by use of inocula grown anaerobically in a medium containing glucose with aeration of sporulation medium via bubbling. After an exten
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9. Optimum pH levels for eluting enteroviruses from sludge solids with beef extract.
This study demonstrates that elution of enteroviruses from a mixture of primary- and activated-sludge solids with beef extract at pH 9.2 +/- 0.2 may be less efficient than elution with beef extract at pH 7.2 +/- 0.2 and that elution of enteroviruses from extended-aeration-sludge solids with beef extract is at best no more efficient at pH 9.2 +/- 0.2 than at
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10. Viscous Product from Activated Sludge by Methanol Fermentation
Aeration of activated sludge with 3 to 4% added methanol for 5 to 7 days yields an odorless, highly viscous (5,000 to 10,000 centipoise), black, pudding-like product containing glycan(s) linked other than α-1-4 or β-1-3. Backseeding gives maximum thickening in 3 to 4 days. Incomplete acid hydrolysis of the black product gives a 0.27% solution of reducing s
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11. Reduction of Ferric Iron in Anaerobic, Marine Sediment and Interaction with Reduction of Nitrate and Sulfate
Studies were carried out to elucidate the nature and importance of Fe3+ reduction in anaerobic slurries of marine surface sediment. A constant accumulation of Fe2+ took place immediately after the endogenous NO3− was depleted. Pasteurized controls showed no activity of Fe3+ reduction. Additions of 0.2 mM NO3− and NO2− to the active slurries arrested th
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12. Growth Inhibition of Mycobacterium tuberculosis After Single-Pulsed Exposures to Streptomycin, Ethambutol, and Rifampin
It was reported earlier that the degree of growth inhibition of tubercle bacilli after single-pulsed isoniazid exposures is a function of the time-concentration product (TCP) of exposure rather than of either time or concentration alone (TCP = hr exposure × μg of drug/ml). In the present investigation, these time and concentration studies have been extende