Ozonation of wastewater sludge for reduction and recycling

An ozone treatment system was introduced as an alternative method for municipal sludge treatment and disposal. A pilot-scale facility was built to investigate the feasibility of the ozonation for sludge reduction and recycle. The system consists of three main parts; advanced wastewater treatment, sl...

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Bibliographic Details
Published in:Water science and technology 2002-01, Vol.46 (10), p.71-77
Main Authors: Ahn, K H, Park, K Y, Maeng, S K, Hwang, J H, Lee, J W, Song, K G, Choi, S
Format: Article
Language:English
Subjects:
Advanced wastewater treatment
Carbon sources
Conservation of Natural Resources
Denitrification
Dewatering
Facility Design and Construction
Feasibility studies
Incineration
Mineralization
Municipal wastes
Oxidants, Photochemical - chemistry
Ozonation
Ozone
Ozone - chemistry
Ozonization
Particle Size
Reduction
Sludge
Sludge disposal
Sludge treatment
Solubility
Waste Disposal, Fluid - methods
Wastewater
Wastewater treatment
Wastewater treatment plants
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Summary:An ozone treatment system was introduced as an alternative method for municipal sludge treatment and disposal. A pilot-scale facility was built to investigate the feasibility of the ozonation for sludge reduction and recycle. The system consists of three main parts; advanced wastewater treatment, sludge ozone treatment and belt press dewatering. Ozonation of wastewater sludge resulted in mass reduction by mineralization as well as volume reduction by improvement of dewatering characteristics. The supernatant of the ozonated sludge, consisting of solubilized organics and micro-particles, proved to be an effective carbon source for denitrification. A simple economic assessment reveals that the ozonation process can be more economical than incineration for sludge treatment and disposal at small- and medium-sized wastewater treatment plants.
ISSN:0273-1223
1996-9732
DOI:10.2166/wst.2002.0293