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Environmental Engineering Research 2001;6(4): 251-259.
DEVELOPMENT OF MONITORING METHODOLOGY TO FINGERPRINT THE ACTIVATED SLUDGE PROCESSES USING OXYGEN UPTAKE RATE
In S. Kim1, James C. Young2, Sungyoun Kim1, and Sungmin Kim1
1Department of Environmental Science & Engineering, Kwangju Institute of Science and Technology, Kwangju 500-712, Korea
2Department of Environmental Engineering, University of Arkansas, Fayetteville, AR 72701, USA
Corresponding Author: In S. Kim ,Tel: +82-62-970-2436, Fax: +82-62-970-2434, Email: iskim@kjist.ac.kr
Received: January 15, 2001;  Accepted: September 15, 2001.
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ABSTRACT
Three case studies on oxygen uptake rate (OUR) were conducted to use OUR as "fingerprints" that can help assess the impact of changes in wastewater characteristics on plant operation. Wastewaters from three different sources, i.e. pharmaceutical wastewater, pulp mill wastewater and chemical production wastewater, were used for OUR measurement to determine the inhibition on biodegradation of organic constituents, the effect of F/M ratio changes on the oxidation rate of biodegradable organic matter and the presence of major groups in the organic constituents. Short-term BOD curves successfully illustrated the completion of biodegradation reaction for each wastewater sample. As it resembled the biodegradation fingerprint for an activated sludge process, OUR data provided reliable information for the significance of changes in wastewater composition and load. Visual observation of these effects was sufficient to identify a causal relationship between the changes in the fingerprint and changes in plant performance.
Keywords: activated sludge process | biodegradation | fingerprints | oxygen uptake rate (OUR)
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