Activated Sludge Process
Mostrando 1-12 de 61 artigos, teses e dissertações.
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1. Production of nanostructured crystalline composite using residual ashes from flocculated sludge burning process in a poultry slaughterhouse wastewater treatment system
Abstract Nanostructured crystalline composite (activated carbon) was synthesized from residual ashes of the burning process of the sludge generated in the flotation step of a poultry slaughterhouse and was used for Allura red dye adsorption. The ashes were chemically activated using two types of reagents, H2O2 and H3PO4, and the structure, morphology, and su
Cerâmica. Publicado em: 2022
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2. Methodology for minimum nitrogen compounds removal efficiencies estimation and wastewater treatment systems pre-selection: a watershed approach
RESUMO O nitrogênio constitui importante parâmetro para o controle da poluição hídrica, uma vez que a nitrificação produz consumo de oxigênio do ambiente aquático, além da toxicidade associada à algumas formas de nitrogênio. Este estudo estabeleceu e empregou modelo de otimização visando a determinação simultânea de eficiências mínimas de
RBRH. Publicado em: 17/10/2019
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3. CO-TREATMENT OF LEACHATE AND DOMESTIC SEWAGE AND ITS INFLUENCE ON NITROGEN REMOVAL
Abstract This research investigated the performance of two pilot-scale treatment plants: an activated sludge and a hybrid model type IFAS (Integrated Fixed-Film Activated Sludge), combining sanitary landfill leachate with domestic sewage treatment with the objective of removing organic substances. In order to assess the possible impacts on the treatment, thr
Braz. J. Chem. Eng.. Publicado em: 30/09/2019
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4. REDUCTION OF EXCESS SLUDGE PRODUCTION IN AN ACTIVATED SLUDGE SYSTEM BASED ON LYSIS-CRYPTIC GROWTH, UNCOUPLING METABOLISM AND FOLIC ACID ADDITION
Abstract The following sludge reduction alternatives were tested in wastewater biological reactors: oxic-settling-anaerobic (OSA-process); ultrasonic disintegration (UD); chlorination (CH); 3,3',4',5-tetrachlorosalicylanilide (TCS); and folic acid (FA). Compared to the control system, UD reduced 55% of the sludge production, and greater substrate and nutrien
Braz. J. Chem. Eng.. Publicado em: 2016-03
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5. PREPARING AGRICULTURAL RESIDUE BASED ADSORBENTS FOR REMOVAL OF DYES FROM EFFLUENTS - A REVIEW
Abstract Industries engaged in dyeing operation generate coloured effluent due to the presence of spent dyes. Adsorption is among the various treatment processes employed for removal of dyes from effluents. Activated carbon is mostly used as an adsorbent in the treatment process. Attempts have been made by researchers to use non-conventional, low-cost, natur
Braz. J. Chem. Eng.. Publicado em: 2015-03
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6. Simulation and calibration of a full-scale sequencing batch reactor for wastewater treatment
The aim of this study is to apply the main mathematical models used in activated sludge reactors, the Activated Sludge Model No. 1 (ASM1) and its variations (ASM2d and ASM3), to predict the behavior of a full-scale sequencing batch reactor (SBR) used for the treatment of domestic wastewater employing the software ASIM®. Two cycles were studied, the step-fee
Braz. J. Chem. Eng.. Publicado em: 2014-09
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7. Activated sludge inhibition capacity index
Toxic compounds in sewage or industrial wastewater may inhibit the biological activity of activated sludge impairing the treatment process. This paper evaluates the Inhibition Capacity Index (ICI) for the assessment of activated sludge in the presence of toxicants. In this study, activated sludge was obtained from industrial treatment plants and was also syn
Braz. J. Chem. Eng.. Publicado em: 2014-06
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8. Detection of enteric viruses in activated sludge by feasible concentration methods
Human enteric viruses are responsible to cause several diseases, including gastroenteritis and hepatitis, and can be present in high amounts in sewage sludge. This study compared virus recovery efficiency of two feasible concentration methods used for detecting human adenovirus (HAdV), rotavirus species A (RV-A), norovirus genogroup II (NoV GII) and hepatiti
Braz. J. Microbiol.. Publicado em: 2014
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9. Oxygen air enrichment through composite membrane: application to an aerated biofilm reactor
A highly permeable composite hollow-fibre membrane developed for air separation was used in a membrane aerated biofilm reactor (MABR). The composite membrane consisted of a porous support layer covered with a thin dense film, which was responsible for oxygen enrichment of the permeate stream. Besides oxygen enrichment capability, dense membranes overcome maj
Braz. J. Chem. Eng.. Publicado em: 2013-12
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10. 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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11. Estudo da tratabilidade de efluente de reator anaeróbio e lixiviado de aterro sanitário utilizando o processo de lodos ativados / Treatability of the anaerobic effluent and landfill leachate using activated sludge process
Embora em alguns países como os europeus, o aterro sanitário como forma de disposição final de Resíduos Sólidos venha perdendo espaço, entre nós essa técnica é ainda largamente empregada. O lixiviado gerado nos aterros sanitários apresenta grande potencial poluidor, devido à presença de matéria orgânica, rica em substâncias húmicas e matéri
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/09/2011
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12. Análise comparativa entre o processo de lodo ativado e o reator de biofilme de leite móvel na remoção de nitrogênio de esgoto sanitário. / Comparative analysis between the activated sludge process and the moving bed biofilm reactor for nitrogen removal of municipal wastewater.
O processo de tratamento de esgoto por lodo ativado pode ser adaptado para o recebimento de maior carga orgânica ou para a remoção de nitrogênio por meio da introdução de suportes plásticos móveis, em um processo conhecido por IFAS Integrated Fixed-Film Activated Sludge. O objetivo do projeto é avaliar comparativamente os desempenhos dos sistemas de
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/08/2011