Ozonolysate of excess sludge as a carbon source in an enhanced biological phosphorus removal for low strength wastewater

Potential use of the municipal sludge ozonolysate as a carbon source was examined for phosphorus removal from low strength wastewater in a modified intermittently decanted extended aeration (IDEA) process. At ozone dosage of 0.2g O3/g solids, readily biodegradable COD accounted for about 36% of COD...

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Bibliographic Details
Published in:Bioresource technology 2011-02, Vol.102 (3), p.2462-2467
Main Authors: Park, K.Y., Lee, J.W., Song, K.G., Ahn, K.H.
Format: Article
Language:English
Subjects:
Acetates
Applied sciences
Bacteria, Anaerobic - metabolism
Biodegradability
Biological and medical sciences
Biological treatment of sewage sludges and wastes
Biotechnology
Carbon
Carbon source
Crack opening displacement
Enhanced biological phosphorus removal
Environment and pollution
Exact sciences and technology
Fundamental and applied biological sciences. Psychology
Industrial applications and implications. Economical aspects
Intermittently decanted extended aeration (IDEA) process
Ozone - metabolism
Ozonolysate
Phosphorus
Phosphorus - isolation & purification
Phosphorus - metabolism
Phosphorus removal
Pollution
Sewage - microbiology
Sludge
Strength
Waste activated sludge
Waste water
Wastes
Wastewaters
Water Pollutants, Chemical - metabolism
Water Purification - methods
Water treatment and pollution
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Summary:Potential use of the municipal sludge ozonolysate as a carbon source was examined for phosphorus removal from low strength wastewater in a modified intermittently decanted extended aeration (IDEA) process. At ozone dosage of 0.2g O3/g solids, readily biodegradable COD accounted for about 36% of COD from sludge ozonolysate. The denitrification potential of ozonolysate as a carbon source was comparable to that of acetate. Although, the first order constant for phosphorus release with the ozonolysate was half that of acetate, it was much higher than that of wastewater. Continuous operation of the modified IDEA process showed that the removals of nitrogen and phosphorus were simultaneously enhanced by addition of the ozonolysate. Phosphorus release was significantly induced after complete denitrification indicating that phosphorus release was strongly depended on nitrate concentration. Effectiveness of the ozonolysate as a carbon source for EBPR was also confirmed in a track study of the modified IDEA.
ISSN:0960-8524
1873-2976
DOI:10.1016/j.biortech.2010.11.012