Activated Sludge
Mostrando 1-12 de 314 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. Aplicabilidade do Activated Sludge Model No. 1 (ASM 1) para simulação do cotratamento de esgoto sanitário e lixiviado de aterro sanitário em lagoas aeradas
RESUMO A necessidade crescente de alternativas para o tratamento e a disposição de lixiviados de aterros sanitários é uma realidade no Brasil, principalmente com os avanços estabelecidos pela Política Nacional de Resíduos Sólidos a partir de 2010 e consequentes metas de substituição de lixões por aterros sanitários. Uma alternativa empregada, dev
Eng. Sanit. Ambient.. Publicado em: 2020-03
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3. Lodo ativado com aeração prolongada operado sob baixa concentração de oxigênio dissolvido: comportamento cinético das bactérias heterotróficas e autotróficas nitrificantes
RESUMO Este trabalho teve como objetivo a determinação dos parâmetros cinéticos que descrevem o crescimento das bactérias heterotróficas e autotróficas nitrificantes em três sistemas de lodos ativados com aeração prolongada, operados com baixa aeração, a fim de se obter a remoção de nitrogênio de esgoto sanitário pelo processo de nitrificaç�
Eng. Sanit. Ambient.. Publicado em: 25/11/2019
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4. 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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5. 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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6. Temporal variation of bacterial population and response to physical and chemical parameters along a petrochemical industry wastewater treatment plant
Abstract: The petrochemical industry has played a considerable role in generation and release of waste in the environment. Activated sludge and facultative lagoons are commonly used for domestic and industrial wastewater treatment due to their low-cost and minimal need for operational requirements. Microorganisms present in wastewater treatment plant (WWTP)
An. Acad. Bras. Ciênc.. Publicado em: 01/07/2019
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7. Application of submerged membrane bioreactor technology for the treatment of high strength dairy wastewater
Abstract In this study, an aerobic submerged membrane bioreactor (sMBR) was used for the treatment of dairy wastewater at 15 h of hydraulic retention time (HRT) and 40 d of sludge retention time (SRT) with constant permeate flux (9.5 L.m-3.d-1(LMH)). The COD, ammonia-nitrogen (NH3-N) and orthophosphate (PO4-P) removal efficiencies were 98.2%, 95.4% and 88.9%
Braz. J. Chem. Eng.. Publicado em: 2018-01
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8. Isolation and characterization of a high salt-tolerant and glyphosate-degrading strain of Agrobacterium tumefaciens BZ8
ABSTRACT In this study, a high salt-tolerant and glyphosate-degrading strain named BZ8 was isolated from activated sludge. According to 16S rDNA sequencing methods, morphological, physiological and biochemical analysis, strain BZ8 was identified as Agrobacterium tumefaciens. The growth and glyphosate-degrading capability of A. tumefaciens BZ8 were investigat
Braz. J. Chem. Eng.. Publicado em: 2017-07
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9. SONO-OXIDATIVE PRE-TREATMENT OF WASTE ACTIVATED SLUDGE BEFORE ANAEROBIC BIODEGRADATION
Abstract The effects of sonication, potassium ferrate (K2FeO4) oxidation and their simultaneous combination (called "sono-oxidative pre-treatment") on chemical properties and anaerobic digestion of waste activated sludge (WAS) were investigated and compared comprehensively. Based on chemical parameters, the optimum operating conditions were found to be 0.3 g
Braz. J. Chem. Eng.. Publicado em: 2017-01
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10. Redução da toxicidade aguda de lixiviado de aterro sanitário em co-tratamento com esgoto doméstico pelo processo integrado de lodo ativado com biofilme em leito móvel
Resumo Neste estudo objetivou-se avaliar a redução da toxicidade aguda no efluente gerado pelo processo híbrido IFAS (Integrated Fixed-Film Activated Sludge) tratando lixiviado de aterro sanitário com esgoto doméstico, por meio de ensaios de toxicidade aguda sobre bactérias marinhas Allivibrio fischeri e microcrustáceo Daphnia similis. Com o intuito d
Rev. Ambient. Água. Publicado em: 2016-06
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11. 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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12. INHIBITION KINETICS DURING THE OXIDATION OF BINARY MIXTURES OF PHENOL WITH CATECHOL, RESORCINOL AND HYDROQUINONE BY PHENOL ACCLIMATED ACTIVATED SLUDGE
Abstract In this work the aerobic degradation of phenol (PH), catechol (CA), resorcinol (RE), hydroquinone (HY) and of the binary mixtures PH+CA, PH+RE, PH+HY by phenol-acclimated activated sludge was studied. Single substrate experiments show a Haldane-type dependence of the respiration rate on PH, RE and HY, while CA corresponded to the Monod model. Binary
Braz. J. Chem. Eng.. Publicado em: 2016-03