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Showing 1 to 9 of 9 for “"filamentous bulking"”.
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Full scale demonstration of filamentous bulking control at a biological nutrient removal activated sludge plant
Includes bibliographical references.
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The effect of a large anoxic mass fraction and concentrations of nitrate and nitrite in the primary anoxic zone on low f/m filament bulking in nutrient removal activated sludge systems
Filamentous bulking occurs when filamentous organisms are present in excessive numbers and extend from floes into the bulk solution. They interfere with the compaction and settling of the activated sludge either by producing a very diffuse floe structure or by causing bridging between floes. This …
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The effect of fully anoxic conditions and frequency of exposure to anoxic and aerobic conditions on the growth of low F/M filaments in nitrogen remova
Filamentous bulking, caused predominantly by low F/M filaments (Blackbeard et al, 1986, 1988), results in considerable settling problems in full scale nitrogen (N) and nutrient (N & P) removal activated sludge plants in South Africa. The development of specific methods for control of low F/M …
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Development of a Biosensor to Predict Activated Sludge Deflocculation, and the Link Between Chlorination and Potassium Efflux
… established between chlorine addition to control filamentous bulking, increased soluble K+ levels and an increase in effluent suspended solids . The results demonstrate that the addition of chlorine to control filamentous bulking may elicit the GGKE mechanism, initiating activated sludge …
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The effect of operational parameters on the dewatering characteristics of municipal wastewater sludges
… on line with the CWWTP, which experienced filamentous bulking conditions since startup and operational parameters of the reactor monitored. Laboratory-scale experiments involved varying mixed liquor D.O. concentration and mean cell residence time (MCRT) and observing the resultant sludge …
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The effect of nitrite and nitrate concentrations on low F/M filament bulking in nitrogen removal activated sludge systems
Filamentous bulking and its associated poor sludge settleability is a considerable problem in South African activated sludge plants, as indicated by the two surveys undertaken on these plants in 1985 and 1988 (Blackbeard et al., 1986, 1988). Amelioration of this problem would enable a greater daily …
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The effect of temperature on denitrification kinetics and biological excess phosphorus removal in nutrient removal activated sludge systems in temperate climates (12°C - 20°C)
Filamentous bulking in nutrient (N & P) removal activated sludge systems is a problem of considerable magnitude - three quarters of 45 plants surveyed were found to have bulking sludges to the extent that sludge settleability (DSVI) was adversely affected. If filamentous organism proliferation …
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The effect of the type, size, position and recycle ratio of the anoxic zone on low F/M filament bulking in nitrogen removal activated sludge systems
Filamentous bulking, which causes deterioration in sludge settleability has been shown, in two nation-wide surveys to be a problem of considerable proportions. Poor sludge settleability in the secondary clarifier limits the daily flow and load that can be treated in activated sludge wastewater …
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Optimization of intermittent aeration for increased nitrogen removal efficiency and improved settling
… In addition to process operation, key issues of filamentous bulking were assessed. Concrete solutions to this continual issue are not available as the unique features of each plants influent and process dynamics prohibit the formulation of a universal solution. Filaments observed throughout this …