Image Analysis as a Monitoring Tool for Activated Sludge Properties in Lab-Scale Installations

An important step in the battle against filamentous bulking is the development of a monitoring system for activated sludge properties. Therefore, a fully automatic image analysis method for recognizing and characterizing flocs and filaments in activated sludge images has been developed. This procedu...

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Bibliographic Details
Published in:Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering Toxic/hazardous substances & environmental engineering, 2003-01, Vol.38 (10), p.2009-2018
Main Authors: Jenné, R., Banadda, E. N., Philips, N., Van Impe, J. F.
Format: Article
Language:English
Subjects:
Activated sludge
Automation
Biological wastewater treatment
Environmental Monitoring - methods
Evolution
Filamentous bulking
Filaments
Flocculation
Image analysis
Image Processing, Computer-Assisted
Monitoring
Monitors
Sewage - microbiology
Sludge
Waste Disposal, Fluid - methods
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Summary:An important step in the battle against filamentous bulking is the development of a monitoring system for activated sludge properties. Therefore, a fully automatic image analysis method for recognizing and characterizing flocs and filaments in activated sludge images has been developed. This procedure has been subsequently used to monitor activated sludge properties in a lab-scale installation. The results of a 100-days experiment indicate that the image information correlates well with the evolution of standard settling properties, in this case the Sludge Volume Index. It is shown that, at the onset of severe filamentous bulking, there is an increase in total filament length on the one hand, and a significant change in floc shape on the other hand.
ISSN:1093-4529
1532-4117
DOI:10.1081/ESE-120023328