A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Effects of Sludge Properties on the Thickening and Dewatering of Waste Activated Sludge
The thickening and dewatering of waste activated sludge, from a pilot‐scale submerged membrane bioreactor and two bench‐scale, complete‐mix activated sludge reactors (high‐shear and low‐shear aeration) treating the same municipal primary effluent, were investigated. Solids settling and compaction were measured using the diluted sludge volume index (DSVI) analysis and a batch centrifugation analysis, respectively. Elevated levels of filamentous microorganisms resulted in higher DSVI values and lower centrifuged pellet concentration. Elevated levels of nocardioform bacteria resulted in lower solids float concentrations, and higher colloidal material reduced solids recovery in batch flotation experiments. Sludge filterability, measured as time‐to‐filter, was shown to be a function of extracelluar polymeric substances and colloidal material, where higher levels of either reduced sludge filterability. Additional research is necessary to confirm these results using full‐ or demonstration‐scale thickening and dewatering units.
Effects of Sludge Properties on the Thickening and Dewatering of Waste Activated Sludge
The thickening and dewatering of waste activated sludge, from a pilot‐scale submerged membrane bioreactor and two bench‐scale, complete‐mix activated sludge reactors (high‐shear and low‐shear aeration) treating the same municipal primary effluent, were investigated. Solids settling and compaction were measured using the diluted sludge volume index (DSVI) analysis and a batch centrifugation analysis, respectively. Elevated levels of filamentous microorganisms resulted in higher DSVI values and lower centrifuged pellet concentration. Elevated levels of nocardioform bacteria resulted in lower solids float concentrations, and higher colloidal material reduced solids recovery in batch flotation experiments. Sludge filterability, measured as time‐to‐filter, was shown to be a function of extracelluar polymeric substances and colloidal material, where higher levels of either reduced sludge filterability. Additional research is necessary to confirm these results using full‐ or demonstration‐scale thickening and dewatering units.
Effects of Sludge Properties on the Thickening and Dewatering of Waste Activated Sludge
Merlo, Rion P. (author) / Trussell, R. Shane (author) / Hermanowicz, Slawomir W. (author) / Jenkins, David (author)
Water Environment Research ; 79 ; 2412-2419
2007-11-01
8 pages
Article (Journal)
Electronic Resource
English
Effects of Coagulation on Sludge Thickening and Dewatering
| Wiley | 1987
Temperature Effects on the Dewatering of Activated Sludge
| UB Braunschweig | 1969
Waste Activated Sludge Thickening: A Technology Review for Cake Lovers
| British Library Conference Proceedings | 1998
Activated sludge process and control based on sludge dewatering potential
| British Library Conference Proceedings | 1995
Laboratory Predictions of Waste Activated Sludge Dewatering by Belt Filter Presses
| British Library Conference Proceedings | 1998