effects of starvation on physical characteristics of flocs in SBR for treating saline wastewater

This study focused on the effects of starvation on physical characteristics of flocs in SBR for treating saline wastewater. Feeding was stopped for 5 and 15 days. A time response of the floc to these starvation periods was monitored as well as the removal efficiencies of pollutants. Correlation betw...

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Bibliographic Details
Published in:Water science and technology 2007-01, Vol.56 (7), p.41-46
Main Authors: Kim, S.S, Moon, B.H, Seo, G.T, Yoon, C.H
Format: Article
Language:English
Subjects:
activated sludge
bioreactors
chemical oxygen demand
duration
Environmental monitoring
flocculation
fractal dimensions
Fractals
microorganisms
nitrogen
phosphorus
Physical characteristics
Physical properties
Pollutants
Pollution monitoring
Removal
saline water
Size distribution
Sludge
Sludge settling
Sodium Chloride - chemistry
Starvation
Time Factors
Time response
Waste Disposal, Fluid - methods
Wastewater
Wastewater treatment
Water Pollution, Chemical - analysis
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Summary:This study focused on the effects of starvation on physical characteristics of flocs in SBR for treating saline wastewater. Feeding was stopped for 5 and 15 days. A time response of the floc to these starvation periods was monitored as well as the removal efficiencies of pollutants. Correlation between the physical characteristics of flocs and settling of sludge was conducted. As the starvation periods were increased, there was a shift in the floc size distribution from a high proportion of large flocs to the development of small size flocs. The fractal dimension of flocs also decreased, as starvation periods were increased. From the results, the effect of starvation on SBR treating saline wastewater can be ordered as follows: COD Mn removal < floc size and fractal dimension < T-N removal < T-P removal.
ISSN:0273-1223
1996-9732
DOI:10.2166/wst.2007.691