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Thermal Hydrolysis of Secondary Scum for Control of Biological Foam
Thermal hydrolysis of secondary scum at 9 bars and 170°C was shown to completely destroy Gordonia sp. cells and reduce its foaming potential, so that it can be recycled to headworks or sent to the solids‐handling side of the plant without the risk of causing foaming problems in the activated sludge system and anaerobic digesters. This process shows promise for biological foam control in wastewater treatment plants where solids retention time control and selective wasting cannot be applied and/or selector installation is not possible. An initial cost comparison of thermal hydrolysis and several widely accepted foam‐management strategies shows it to be competitive; however, optimization of operating pressure and temperature is necessary.
Thermal Hydrolysis of Secondary Scum for Control of Biological Foam
Thermal hydrolysis of secondary scum at 9 bars and 170°C was shown to completely destroy Gordonia sp. cells and reduce its foaming potential, so that it can be recycled to headworks or sent to the solids‐handling side of the plant without the risk of causing foaming problems in the activated sludge system and anaerobic digesters. This process shows promise for biological foam control in wastewater treatment plants where solids retention time control and selective wasting cannot be applied and/or selector installation is not possible. An initial cost comparison of thermal hydrolysis and several widely accepted foam‐management strategies shows it to be competitive; however, optimization of operating pressure and temperature is necessary.
Thermal Hydrolysis of Secondary Scum for Control of Biological Foam
Jolis, Domènec (author) / Marneri, Matina (author)
Water Environment Research ; 78 ; 835-841
2006-08-01
7 pages
Article (Journal)
Electronic Resource
English
Scum in Biological Wastewater Treatment
| Online Contents | 2005
Engineering Index Backfile | 1941
Special issue: Scum in biological wastewater treatment
Catalogue agriculture | 2005
| Engineering Index Backfile | 1946