Filamentous Bulking
Mostrando 1-10 de 10 artigos, teses e dissertações.
-
1. 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
-
2. Potencial de aplicação do processo foto-fenton/solar como pré-tratamento de efluente da indústria de laticínios
Dairy wastewater is characterized by frequent episodes of drastic increases of organic content, giving rise to bulking filamentous bacteria and compromising the biological treatment process. This study reports the reduction of organic content of such wastewater by the application of the solar photo-Fenton process. For a wastewater containing 335, 2627 or 540
Química Nova. Publicado em: 2007
-
3. 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
-
4. 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.
-
5. 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
-
6. Chlorine-Susceptible and Chlorine-Resistant Type 021N Bacteria Occurring in Bulking Activated Sludges
Two filamentous bacteria causing bulking in two activated sludges were examined. Investigations using morphological features, staining techniques, and fluorescent in situ hybridization identified both filaments as type 021N. However, an examination of the effect of chlorine on the sludges revealed a chlorine-susceptible type 021N in one sludge and a chlorine
American Society for Microbiology.
-
7. Phylogenetic Analysis of and Oligonucleotide Probe Development for Eikelboom Type 021N Filamentous Bacteria Isolated from Bulking Activated Sludge
Fifteen filamentous strains, morphologically classified as Eikelboom type 021N bacteria, were isolated from bulking activated sludges. Based on comparative 16S ribosomal DNA (rDNA) sequence analysis, all strains form a monophyletic cluster together with all recognized Thiothrix species (88.3 to 98.7% 16S rDNA sequence similarity) within the gamma-subclass of
American Society for Microbiology.
-
8. 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
-
9. Identification of a Gene Essential for Sheathed Structure Formation in Sphaerotilus natans, a Filamentous Sheathed Bacterium
Sphaerotilus natans, a filamentous bacterium that causes bulking in activated sludge processes, can assume two distinct morphologies, depending on the substrate concentration for growth; in substrate-rich media it grows as single rod-shaped cells, whereas in substrate-limited media it grows as filaments. To identify genes responsible for sheath formation, we
American Society for Microbiology.
-
10. 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