Filamentous Sludge
Mostrando 1-12 de 20 artigos, teses e dissertações.
-
1. 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
-
2. Filamentous fungi from sewage sludge: impact on mycoflora and potential enzyme / Fungos filamentosos do lodo de esgoto: impacto na microbiota fúngica e potencial enzimático
As Estações de Tratamento de Esgotos (ETEs) surgiram para amenizar a poluição nos fluxos hídricos decorrentes dos despejos desse resíduo, como por exemplo, o lodo de esgoto. Esse resíduo está sendo muito utilizado na agricultura por ser rico em matéria orgânica e nutrientes, ajudando na produtividade e fertilidade do solo e contribuindo para o aume
Publicado em: 2009
-
3. Use of talc for filamentous bulking control in effluent treatment plant of a recycled paper mill / Uso de talco no controle do intumescimento filamentoso no tratamento de efluentes de fábrica de papel reciclado
A otimização e o monitoramento dos parâmetros operacionais de uma estação de tratamento de efluentes industriais tornam-se necessários para o perfeito equilíbrio do sistema e para a manutenção da eficiência de redução de poluentes a níveis compatíveis com a legislação vigente. Um dos principais problemas operacionais existentes em um sistema
Publicado em: 2007
-
4. Controle do intumescimento filamentoso em um sistema de lodos ativados utilizando seletores biológicos / Filamentous bulking control in activated sludge plant with biologic selectors
Avaliou-se métodos de controle do intumescimento filamentoso em um sistema de tratamento de efluentes por lodos ativados de uma fábrica de papel reciclado. Em uma primeira fase utilizou-se uma planta piloto de 72,9 litros e na segunda fase uma planta laboratorial de 5,0 litros, composta por quatro sistemas em paralelo. Em ambas escalas pretendeu-se simular
Publicado em: 2002
-
5. Tetrazolium Reduction-Malachite Green Method for Assessing the Viability of Filamentous Bacteria in Activated Sludge
A method was developed to assess the activity of filamentous bacteria in activated sludge. It involves the incubation of activated sludge with 2(p-iodophenyl)-3-(p-nitrophenyl)-5-phenyl tetrazolium chloride followed by staining with malachite green. Both cells and 2(p-iodophenyl)-3-(p-nitrophenyl)-5-phenyl tetrazolium chloride-formazan crystals can be observ
-
6. Relationship of Species-Specific Filament Levels to Filamentous Bulking in Activated Sludge
To examine the relationship between activated-sludge bulking and levels of specific filamentous bacteria, we developed a statistics-based quantification method for estimating the biomass levels of specific filaments using 16S rRNA-targeted fluorescent in situ hybridization (FISH) probes. The results of quantitative FISH for the filament Sphaerotilus natans w
American Society for Microbiology.
-
7. Group-specific small-subunit rRNA hybridization probes to characterize filamentous foaming in activated sludge systems.
Foaming in activated sludge systems is characterized by the formation of a thick, chocolate brown-colored scum that floats on the surface of aeration basins and secondary clarifiers. These viscous foams have been associated with the presence of filamentous mycolic acid-containing actinomycetes. To aid in evaluating the microbial representation in foam, we de
-
8. Application of the Fluorescent-Antibody Technique for the Detection of Sphaerotilus natans in Activated Sludge
Sphaerotilus natans, one of the most widely reported causes of bulking in activated sludge, can exist both within and outside of a sheath. It can easily be confused with similar activated sludge bacteria and thus can be overlooked when present in low numbers. Fluorescent antiserum was successfully prepared against the nonfilamentous form and was shown to be
-
9. Methanogenesis in an Upflow Anaerobic Sludge Blanket Reactor at pH 6 on an Acetate-Propionate Mixture
High-rate anaerobic digestion can be applied in upflow anaerobic sludge blanket reactors for the treatment of various wastewaters. In upflow anaerobic sludge blanket reactors, sludge retention time is increased by a natural immobilization mechanism (viz. the formation of a granular type of sludge). When this sludge is cultivated on acid-containing wastewater
-
10. Novel Actinomycete Isolated from Bulking Industrial Sludge
A novel actinomycete was the predominant filamentous microorganism in bulking activated sludge in a bench-scale reactor treating coke plant wastewater. The bacterium was isolated and identified as an actinomycete that is biochemically and morphologically similar to Amycolatopsis orientalis; however, a lack of DNA homology excludes true relatedness. At presen
-
11. Filamentous sulfur bacteria of activated sludge: characterization of Thiothrix, Beggiatoa, and Eikelboom type 021N strains.
Seventeen strains of filamentous sulfur bacteria were isolated in axenic culture from activated sludge mixed liquor samples and sulfide-gradient enrichment cultures. Isolation procedures involved plating a concentrated inoculum of washed filaments onto media containing sulfide or thiosulfate. The isolates were identified as Thiothrix spp., Beggiatoa spp., an
-
12. Microthrix parvicella, a filamentous bacterium isolated from activated sludge: cultivation in a chemically defined medium.
A large number of media have been tested for cultivating Microthris parvicella, a filamentous microorganism often present in the activated sludge of oxidation ditches. The bacterium was found to utilize oleic acid (preferably as Tween 80) as the sole source of carbon and energy. Sulfur is required in the reduced form. The tested media vary from a complex to