Ozonolysate of excess sludge as a carbon source in an enhanced biological phosphorus removal for low strength wastewater
- Ozonolysate of excess sludge as a carbon source in an enhanced biological phosphorus removal for low strength wastewater
- 박기영; 이재우; 송경근; 안규홍
- Intermittently decanted extended aeration (IDEA) process; Carbon source; Enhanced biological phosphorus removal; Ozonolysate; Waste activated sludge
- Issue Date
- Bioresource technology : biomass, bioenergy, biowastes, conversion technologies, biotransformations, production technologies
- VOL 102, NO 3, 2462-2467
- 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 0.2 g 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.
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