Journal of Chemical Technology & Biotechnology · 2001 · 41 citations · 7 references
EngineeringChemical EngineeringEnvironmental EngineeringWaste ManagementWastewater TreatmentWater TreatmentActivated Sludge ProcessSludge ManagementSludge TreatmentWaste TreatmentWastewater BiotreatmentWastewater ManagementOzonationOzoneReactor OperationSludge MinimizationSludge ValorizationWaste Activated Sludge TreatmentWastewater Sludge Management
Abstract Intermittent ozonation of a part of the recycle sludge was performed two times a week for a laboratory‐scale reactor at an average ozone dose of 0.019 g O 3 (gSS ozonated ) −1 . Under these conditions a decrease of about 50% in sludge growth was obtained for the ozone‐treated system, in comparison with the control. As a consequence less sludge had to be removed from the test reactor. Only a slight decrease in quality of effluent was noticed. A comparative cost calculation was made, based on these results, between an ozone‐treated activated sludge system and a traditional activated sludge system. © 2001 Society of Chemical Industry
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